Articles | Volume 19, issue 13
https://doi.org/10.5194/bg-19-3131-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-3131-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Jul 2022
Research article |
| 04 Jul 2022
| 04 Jul 2022
The influence of mesoscale climate drivers on hypoxia in a fjord-like deep coastal inlet and its potential implications regarding climate change: examining a decade of water quality data
Johnathan Daniel Maxey
CORRESPONDING AUTHOR
Faculty of Engineering, Computing and Science, Swinburne University of Technology, Kuching 93350, Malaysia
ADS Environmental Services, Kota Kinabalu, Sabah, 88400, Malaysia
Neil David Hartstein
ADS Environmental Services, Kota Kinabalu, Sabah, 88400, Malaysia
Aazani Mujahid
Faculty of Resource Science & Technology, University Malaysia
Sarawak, Kota Samarahan 94300, Sarawak, Malaysia
Moritz Müller
Faculty of Engineering, Computing and Science, Swinburne University of Technology, Kuching 93350, Malaysia
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Jenny Choo, Nagur Cherukuru, Eric Lehmann, Matt Paget, Aazani Mujahid, Patrick Martin, and Moritz Müller
Biogeosciences, 19, 5837–5857, https://doi.org/10.5194/bg-19-5837-2022, https://doi.org/10.5194/bg-19-5837-2022, 2022
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This study presents the first observation of water quality changes over space and time in the coastal systems of Sarawak, Malaysian Borneo, using remote sensing technologies. While our findings demonstrate that the southwestern coast of Sarawak is within local water quality standards, historical patterns of water quality degradation that were detected can help to alert local authorities and enhance management and monitoring strategies of coastal waters in this region.
Alexandra Klemme, Tim Rixen, Denise Müller-Dum, Moritz Müller, Justus Notholt, and Thorsten Warneke
Biogeosciences, 19, 2855–2880, https://doi.org/10.5194/bg-19-2855-2022, https://doi.org/10.5194/bg-19-2855-2022, 2022
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Tropical peat-draining rivers contain high amounts of carbon. Surprisingly, measured carbon dioxide (CO2) emissions from those rivers are comparatively moderate. We compiled data from 10 Southeast Asian rivers and found that CO2 production within these rivers is hampered by low water pH, providing a natural threshold for CO2 emissions. Furthermore, we find that enhanced carbonate input, e.g. caused by human activities, suspends this natural threshold and causes increased CO2 emissions.
Zhuo-Yi Zhu, Joanne Oakes, Bradley Eyre, Youyou Hao, Edwin Sien Aun Sia, Shan Jiang, Moritz Müller, and Jing Zhang
Biogeosciences, 17, 2473–2485, https://doi.org/10.5194/bg-17-2473-2020, https://doi.org/10.5194/bg-17-2473-2020, 2020
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Samples were collected in August 2016 in the Rajang River and its estuary, with tropical forest in the river basin and peatland in the estuary. Organic matter composition was influenced by transportation in the river basin, whereas peatland added clear biodegraded parts to the fluvial organic matter, which implies modification of the initial lability and/or starting points in the subsequent degradation and alternation processes after the organic matter enters the sea.
Xiaohui Zhang, Moritz Müller, Shan Jiang, Ying Wu, Xunchi Zhu, Aazani Mujahid, Zhuoyi Zhu, Mohd Fakharuddin Muhamad, Edwin Sien Aun Sia, Faddrine Holt Ajon Jang, and Jing Zhang
Biogeosciences, 17, 1805–1819, https://doi.org/10.5194/bg-17-1805-2020, https://doi.org/10.5194/bg-17-1805-2020, 2020
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This study offered detailed information on dFe concentrations, distribution and the magnitude of yield in the Rajang River, the largest river in Malaysia. Three blackwater rivers, draining from peatlands, were also included in our study. Compared with the Rajang River, the dFe concentrations and yield from three blackwater rivers were much higher. The precipitation and agricultural activities, such as palm oil plantations, may markedly increase the concentration dFe in these tropical rivers.
Yan Chang, Moritz Müller, Ying Wu, Shan Jiang, Wan Wan Cao, Jian Guo Qu, Jing Ling Ren, Xiao Na Wang, En Ming Rao, Xiao Lu Wang, Aazani Mujahid, Mohd Fakharuddin Muhamad, Edwin Sien Aun Sia, Faddrine Holt Ajon Jang, and Jing Zhang
Biogeosciences, 17, 1133–1145, https://doi.org/10.5194/bg-17-1133-2020, https://doi.org/10.5194/bg-17-1133-2020, 2020
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Selenium (Se) is an essential micronutrient for many organisms. Our knowledge of dissolved Se biogeochemical cycling in tropical estuaries is limited. We have found that dissolved organic Se (DOSe) was the major speciation in the peat-draining rivers and estuaries. The DOSe fractions may be associated with high molecular weight peatland-derived carbon compounds and may photodegrade to more bioavailable forms once transported to oligotrophic coastal water, where they may promote productivity.
Ying Wu, Kun Zhu, Jing Zhang, Moritz Müller, Shan Jiang, Aazani Mujahid, Mohd Fakharuddin Muhamad, and Edwin Sien Aun Sia
Biogeosciences, 16, 4517–4533, https://doi.org/10.5194/bg-16-4517-2019, https://doi.org/10.5194/bg-16-4517-2019, 2019
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Our understanding of terrestrial organic matter (TOM) in tropical peat-draining rivers remains limited, especially in Southeast Asia. We explored the characteristics of TOM via bulk parameters and lignin phenols of sediment in Malaysia. This showed that the most important plant source of the organic matter in these rivers is woody angiosperm C3 plants with limited diagenetic alteration. This slower degradation of TOM may be a link to higher total nitrogen content, especially for the small river.
Hermann W. Bange, Chun Hock Sim, Daniel Bastian, Jennifer Kallert, Annette Kock, Aazani Mujahid, and Moritz Müller
Biogeosciences, 16, 4321–4335, https://doi.org/10.5194/bg-16-4321-2019, https://doi.org/10.5194/bg-16-4321-2019, 2019
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Nitrous oxide (N2O) and methane (CH4) are atmospheric trace gases which play important roles in the climate and atmospheric chemistry of the Earth. However, little is known about their emissions from rivers and estuaries. To this end, concentrations of N2O and CH4 were measured during a seasonal study in six rivers and estuaries in northwestern Borneo. The concentrations of both gases were mainly driven by rainfall. The rivers and estuaries were an overall net source of atmospheric N2O and CH4.
Edwin Sien Aun Sia, Zhuoyi Zhu, Jing Zhang, Wee Cheah, Shan Jiang, Faddrine Holt Jang, Aazani Mujahid, Fuh-Kwo Shiah, and Moritz Müller
Biogeosciences, 16, 4243–4260, https://doi.org/10.5194/bg-16-4243-2019, https://doi.org/10.5194/bg-16-4243-2019, 2019
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Microbial community composition and diversity in freshwater habitats are much less studied compared to marine and soil communities. This study presents the first assessment of microbial communities of the Rajang River, the longest river in Malaysia, expanding our knowledge of microbial ecology in tropical regions. Areas surrounded by oil palm plantations showed the lowest diversity and other signs of anthropogenic impacts included the presence of CFB groups as well as probable algal blooms.
Shan Jiang, Moritz Müller, Jie Jin, Ying Wu, Kun Zhu, Guosen Zhang, Aazani Mujahid, Tim Rixen, Mohd Fakharuddin Muhamad, Edwin Sien Aun Sia, Faddrine Holt Ajon Jang, and Jing Zhang
Biogeosciences, 16, 2821–2836, https://doi.org/10.5194/bg-16-2821-2019, https://doi.org/10.5194/bg-16-2821-2019, 2019
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Three cruises were conducted in the Rajang River estuary, Malaysia. The results revealed that the decomposition of terrestrial organic matter and the subsequent soil leaching were the main sources of dissolved inorganic nitrogen (DIN) in the fresh river water. Porewater exchange and ammonification enhanced DIN concentrations in the estuary water, while intensities of DIN addition varied between seasons. The riverine DIN flux could reach 101.5 ton(N) / d, supporting the coastal primary producers.
Yongli Zhou, Patrick Martin, and Moritz Müller
Biogeosciences, 16, 2733–2749, https://doi.org/10.5194/bg-16-2733-2019, https://doi.org/10.5194/bg-16-2733-2019, 2019
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We found that peatlands in coastal Sarawak, Borneo, export extremely humified organic matter, which dominates the riverine organic matter pool and conservatively mixes with seawater, while the freshly produced fraction is low and stable in concentration at all salinities. We estimated that terrigenous fractions, which showed high photolability, still account for 20 % of the coastal dissolved organic carbon pool, implying the importance of peat-derived organic matter in the coastal carbon cycle.
Edwin Sien Aun Sia, Jing Zhang, Shan Jiang, Zhuoyi Zhu, Gonzalo Carrasco, Faddrine Holt Jang, Aazani Mujahid, and Moritz Müller
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-219, https://doi.org/10.5194/bg-2019-219, 2019
Revised manuscript not accepted
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Nutrient loads carried by large rivers and discharged into the continental shelf and coastal waters are vital to support primary production. Our knowledge of tropical river systems is fragmented with very few seasonal studies available for Southeast Asia (SEA). We present data from three sampling campaigns on the longest river in Malaysia, the Rajang river. Our results show the generalization of SEA as a nutrient hotspot might not hold true for all regions and requires further investigation.
Denise Müller-Dum, Thorsten Warneke, Tim Rixen, Moritz Müller, Antje Baum, Aliki Christodoulou, Joanne Oakes, Bradley D. Eyre, and Justus Notholt
Biogeosciences, 16, 17–32, https://doi.org/10.5194/bg-16-17-2019, https://doi.org/10.5194/bg-16-17-2019, 2019
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Southeast Asian peat-draining rivers are potentially strong sources of carbon to the atmosphere due to the large amounts of organic carbon stored in those ecosystems. We present the first assessment of CO2 emissions from the Rajang River, the largest peat-draining river in Malaysia. The peatlands’ influence on the CO2 emissions from the Rajang River was smaller than expected, probably due to their proximity to the coast. Therefore, the Rajang was only a moderate source of CO2 to the atmosphere.
Patrick Martin, Nagur Cherukuru, Ashleen S. Y. Tan, Nivedita Sanwlani, Aazani Mujahid, and Moritz Müller
Biogeosciences, 15, 6847–6865, https://doi.org/10.5194/bg-15-6847-2018, https://doi.org/10.5194/bg-15-6847-2018, 2018
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The carbon cycle is a key control for the Earth's climate. Every year rivers deliver a lot of organic carbon to coastal seas, but we do not know what happens to this carbon, particularly in the tropics. We show that rivers in Borneo deliver carbon from peat swamps to the sea with at most minimal biological or chemical alteration in estuaries, but sunlight can rapidly oxidise this carbon to CO2. This means that south-east Asian seas are likely hotspots of terrestrial carbon decomposition.
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Experiments of the efficacy of tree ring blue intensity as a climate proxy in central and western China
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Stability of alkalinity in ocean alkalinity enhancement (OAE) approaches – consequences for durability of CO2 storage
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Olivia Haas, Iain Colin Prentice, and Sandy P. Harrison
Biogeosciences, 20, 3981–3995, https://doi.org/10.5194/bg-20-3981-2023, https://doi.org/10.5194/bg-20-3981-2023, 2023
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We quantify the impact of CO2 and climate on global patterns of burnt area, fire size, and intensity under Last Glacial Maximum (LGM) conditions using three climate scenarios. Climate change alone did not produce the observed LGM reduction in burnt area, but low CO2 did through reducing vegetation productivity. Fire intensity was sensitive to CO2 but strongly affected by changes in atmospheric dryness. Low CO2 caused smaller fires; climate had the opposite effect except in the driest scenario.
Rebecca M. Varney, Sarah E. Chadburn, Eleanor J. Burke, Simon Jones, Andy J. Wiltshire, and Peter M. Cox
Biogeosciences, 20, 3767–3790, https://doi.org/10.5194/bg-20-3767-2023, https://doi.org/10.5194/bg-20-3767-2023, 2023
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This study evaluates soil carbon projections during the 21st century in CMIP6 Earth system models. In general, we find a reduced spread of changes in global soil carbon in CMIP6 compared to the previous CMIP5 generation. The reduced CMIP6 spread arises from an emergent relationship between soil carbon changes due to change in plant productivity and soil carbon changes due to changes in turnover time. We show that this relationship is consistent with false priming under transient climate change.
Claudia Hinrichs, Peter Köhler, Christoph Völker, and Judith Hauck
Biogeosciences, 20, 3717–3735, https://doi.org/10.5194/bg-20-3717-2023, https://doi.org/10.5194/bg-20-3717-2023, 2023
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This study evaluated the alkalinity distribution in 14 climate models and found that most models underestimate alkalinity at the surface and overestimate it in the deeper ocean. It highlights the need for better understanding and quantification of processes driving alkalinity distribution and calcium carbonate dissolution and the importance of accounting for biases in model results when evaluating potential ocean alkalinity enhancement experiments.
Yonghong Zheng, Huanfeng Shen, Rory Abernethy, and Rob Wilson
Biogeosciences, 20, 3481–3490, https://doi.org/10.5194/bg-20-3481-2023, https://doi.org/10.5194/bg-20-3481-2023, 2023
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Investigations in central and western China show that tree ring inverted latewood intensity expresses a strong positive relationship with growing-season temperatures, indicating exciting potential for regions south of 30° N that are traditionally not targeted for temperature reconstructions. Earlywood BI also shows good potential to reconstruct hydroclimate parameters in some humid areas and will enhance ring-width-based hydroclimate reconstructions in the future.
Stefano Potter, Sol Cooperdock, Sander Veraverbeke, Xanthe Walker, Michelle C. Mack, Scott J. Goetz, Jennifer Baltzer, Laura Bourgeau-Chavez, Arden Burrell, Catherine Dieleman, Nancy French, Stijn Hantson, Elizabeth E. Hoy, Liza Jenkins, Jill F. Johnstone, Evan S. Kane, Susan M. Natali, James T. Randerson, Merritt R. Turetsky, Ellen Whitman, Elizabeth Wiggins, and Brendan M. Rogers
Biogeosciences, 20, 2785–2804, https://doi.org/10.5194/bg-20-2785-2023, https://doi.org/10.5194/bg-20-2785-2023, 2023
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Here we developed a new burned-area detection algorithm between 2001–2019 across Alaska and Canada at 500 m resolution. We estimate 2.37 Mha burned annually between 2001–2019 over the domain, emitting 79.3 Tg C per year, with a mean combustion rate of 3.13 kg C m−2. We found larger-fire years were generally associated with greater mean combustion. The burned-area and combustion datasets described here can be used for local- to continental-scale applications of boreal fire science.
V. Rachel Chimuka, Claude-Michel Nzotungicimpaye, and Kirsten Zickfeld
Biogeosciences, 20, 2283–2299, https://doi.org/10.5194/bg-20-2283-2023, https://doi.org/10.5194/bg-20-2283-2023, 2023
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We propose a new method to quantify carbon cycle feedbacks under negative CO2 emissions. Our method isolates the lagged carbon cycle response to preceding positive emissions from the response to negative emissions. Our findings suggest that feedback parameters calculated with the novel approach are larger than those calculated with the conventional approach whereby carbon cycle inertia is not corrected for, with implications for the effectiveness of carbon dioxide removal in reducing CO2 levels.
Marcus Breil, Annabell Weber, and Joaquim G. Pinto
Biogeosciences, 20, 2237–2250, https://doi.org/10.5194/bg-20-2237-2023, https://doi.org/10.5194/bg-20-2237-2023, 2023
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A promising strategy for mitigating burdens of heat extremes in Europe is to replace dark coniferous forests with brighter deciduous forests. The consequence of this would be reduced absorption of solar radiation, which should reduce the intensities of heat periods. In this study, we show that deciduous forests have a certain cooling effect on heat period intensities in Europe. However, the magnitude of the temperature reduction is quite small.
Gesche Blume-Werry, Jonatan Klaminder, Eveline J. Krab, and Sylvain Monteux
Biogeosciences, 20, 1979–1990, https://doi.org/10.5194/bg-20-1979-2023, https://doi.org/10.5194/bg-20-1979-2023, 2023
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Northern soils store a lot of carbon. Most research has focused on how this carbon storage is regulated by cold temperatures. However, it is soil organisms, from minute bacteria to large earthworms, that decompose the organic material. Novel soil organisms from further south could increase decomposition rates more than climate change does and lead to carbon losses. We therefore advocate for including soil organisms when predicting the fate of soil functions in warming northern ecosystems.
Koramanghat Unnikrishnan Jayakrishnan and Govindasamy Bala
Biogeosciences, 20, 1863–1877, https://doi.org/10.5194/bg-20-1863-2023, https://doi.org/10.5194/bg-20-1863-2023, 2023
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Afforestation and reducing fossil fuel emissions are two important mitigation strategies to reduce the amount of global warming. Our work shows that reducing fossil fuel emissions is relatively more effective than afforestation for the same amount of carbon removed from the atmosphere. However, understanding of the processes that govern the biophysical effects of afforestation should be improved before considering our results for climate policy.
Jens Hartmann, Niels Suitner, Carl Lim, Julieta Schneider, Laura Marín-Samper, Javier Arístegui, Phil Renforth, Jan Taucher, and Ulf Riebesell
Biogeosciences, 20, 781–802, https://doi.org/10.5194/bg-20-781-2023, https://doi.org/10.5194/bg-20-781-2023, 2023
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CO2 can be stored in the ocean via increasing alkalinity of ocean water. Alkalinity can be created via dissolution of alkaline materials, like limestone or soda. Presented research studies boundaries for increasing alkalinity in seawater. The best way to increase alkalinity was found using an equilibrated solution, for example as produced from reactors. Adding particles for dissolution into seawater on the other hand produces the risk of losing alkalinity and degassing of CO2 to the atmosphere.
Damian L. Arévalo-Martínez, Amir Haroon, Hermann W. Bange, Ercan Erkul, Marion Jegen, Nils Moosdorf, Jens Schneider von Deimling, Christian Berndt, Michael Ernst Böttcher, Jasper Hoffmann, Volker Liebetrau, Ulf Mallast, Gudrun Massmann, Aaron Micallef, Holly A. Michael, Hendrik Paasche, Wolfgang Rabbel, Isaac Santos, Jan Scholten, Katrin Schwalenberg, Beata Szymczycha, Ariel T. Thomas, Joonas J. Virtasalo, Hannelore Waska, and Bradley A. Weymer
Biogeosciences, 20, 647–662, https://doi.org/10.5194/bg-20-647-2023, https://doi.org/10.5194/bg-20-647-2023, 2023
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Groundwater flows at the land–ocean transition and the extent of freshened groundwater below the seafloor are increasingly relevant in marine sciences, both because they are a highly uncertain term of biogeochemical budgets and due to the emerging interest in the latter as a resource. Here, we discuss our perspectives on future research directions to better understand land–ocean connectivity through groundwater and its potential responses to natural and human-induced environmental changes.
Morgan Sparey, Peter Cox, and Mark S. Williamson
Biogeosciences, 20, 451–488, https://doi.org/10.5194/bg-20-451-2023, https://doi.org/10.5194/bg-20-451-2023, 2023
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Accurate climate models are vital for mitigating climate change; however, projections often disagree. Using Köppen–Geiger bioclimate classifications we show that CMIP6 climate models agree well on the fraction of global land surface that will change classification per degree of global warming. We find that 13 % of land will change climate per degree of warming from 1 to 3 K; thus, stabilising warming at 1.5 rather than 2 K would save over 7.5 million square kilometres from bioclimatic change.
Huanhuan Wang, Chao Yue, and Sebastiaan Luyssaert
Biogeosciences, 20, 75–92, https://doi.org/10.5194/bg-20-75-2023, https://doi.org/10.5194/bg-20-75-2023, 2023
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This study provided a synthesis of three influential methods to quantify afforestation impact on surface temperature. Results showed that actual effect following afforestation was highly dependent on afforestation fraction. When full afforestation is assumed, the actual effect approaches the potential effect. We provided evidence the afforestation faction is a key factor in reconciling different methods and emphasized that it should be considered for surface cooling impacts in policy evaluation.
Ryan S. Padrón, Lukas Gudmundsson, Laibao Liu, Vincent Humphrey, and Sonia I. Seneviratne
Biogeosciences, 19, 5435–5448, https://doi.org/10.5194/bg-19-5435-2022, https://doi.org/10.5194/bg-19-5435-2022, 2022
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The answer to how much carbon land ecosystems are projected to remove from the atmosphere until 2100 is different for each Earth system model. We find that differences across models are primarily explained by the annual land carbon sink dependence on temperature and soil moisture, followed by the dependence on CO2 air concentration, and by average climate conditions. Our insights on why each model projects a relatively high or low land carbon sink can help to reduce the underlying uncertainty.
Julian Gutt, Stefanie Arndt, David Keith Alan Barnes, Horst Bornemann, Thomas Brey, Olaf Eisen, Hauke Flores, Huw Griffiths, Christian Haas, Stefan Hain, Tore Hattermann, Christoph Held, Mario Hoppema, Enrique Isla, Markus Janout, Céline Le Bohec, Heike Link, Felix Christopher Mark, Sebastien Moreau, Scarlett Trimborn, Ilse van Opzeeland, Hans-Otto Pörtner, Fokje Schaafsma, Katharina Teschke, Sandra Tippenhauer, Anton Van de Putte, Mia Wege, Daniel Zitterbart, and Dieter Piepenburg
Biogeosciences, 19, 5313–5342, https://doi.org/10.5194/bg-19-5313-2022, https://doi.org/10.5194/bg-19-5313-2022, 2022
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Long-term ecological observations are key to assess, understand and predict impacts of environmental change on biotas. We present a multidisciplinary framework for such largely lacking investigations in the East Antarctic Southern Ocean, combined with case studies, experimental and modelling work. As climate change is still minor here but is projected to start soon, the timely implementation of this framework provides the unique opportunity to document its ecological impacts from the very onset.
Daniel François, Adina Paytan, Olga Maria Oliveira de Araújo, Ricardo Tadeu Lopes, and Cátia Fernandes Barbosa
Biogeosciences, 19, 5269–5285, https://doi.org/10.5194/bg-19-5269-2022, https://doi.org/10.5194/bg-19-5269-2022, 2022
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Our analysis revealed that under the two most conservative acidification projections foraminifera assemblages did not display considerable changes. However, a significant decrease in species richness was observed when pH decreases to 7.7 pH units, indicating adverse effects under high-acidification scenarios. A micro-CT analysis revealed that calcified tests of Archaias angulatus were of lower density in low pH, suggesting no acclimation capacity for this species.
Leander Moesinger, Ruxandra-Maria Zotta, Robin van der Schalie, Tracy Scanlon, Richard de Jeu, and Wouter Dorigo
Biogeosciences, 19, 5107–5123, https://doi.org/10.5194/bg-19-5107-2022, https://doi.org/10.5194/bg-19-5107-2022, 2022
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The standardized vegetation optical depth index (SVODI) can be used to monitor the vegetation condition, such as whether the vegetation is unusually dry or wet. SVODI has global coverage, spans the past 3 decades and is derived from multiple spaceborne passive microwave sensors of that period. SVODI is based on a new probabilistic merging method that allows the merging of normally distributed data even if the data are not gap-free.
Rebecca M. Varney, Sarah E. Chadburn, Eleanor J. Burke, and Peter M. Cox
Biogeosciences, 19, 4671–4704, https://doi.org/10.5194/bg-19-4671-2022, https://doi.org/10.5194/bg-19-4671-2022, 2022
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Soil carbon is the Earth’s largest terrestrial carbon store, and the response to climate change represents one of the key uncertainties in obtaining accurate global carbon budgets required to successfully militate against climate change. The ability of climate models to simulate present-day soil carbon is therefore vital. This study assesses soil carbon simulation in the latest ensemble of models which allows key areas for future model development to be identified.
Laurent Bopp, Olivier Aumont, Lester Kwiatkowski, Corentin Clerc, Léonard Dupont, Christian Ethé, Thomas Gorgues, Roland Séférian, and Alessandro Tagliabue
Biogeosciences, 19, 4267–4285, https://doi.org/10.5194/bg-19-4267-2022, https://doi.org/10.5194/bg-19-4267-2022, 2022
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The impact of anthropogenic climate change on the biological production of phytoplankton in the ocean is a cause for concern because its evolution could affect the response of marine ecosystems to climate change. Here, we identify biological N fixation and its response to future climate change as a key process in shaping the future evolution of marine phytoplankton production. Our results show that further study of how this nitrogen fixation responds to environmental change is essential.
Negar Vakilifard, Richard G. Williams, Philip B. Holden, Katherine Turner, Neil R. Edwards, and David J. Beerling
Biogeosciences, 19, 4249–4265, https://doi.org/10.5194/bg-19-4249-2022, https://doi.org/10.5194/bg-19-4249-2022, 2022
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To remain within the Paris climate agreement, there is an increasing need to develop and implement carbon capture and sequestration techniques. The global climate benefits of implementing negative emission technologies over the next century are assessed using an Earth system model covering a wide range of plausible climate states. In some model realisations, there is continued warming after emissions cease. This continued warming is avoided if negative emissions are incorporated.
Marco Reale, Gianpiero Cossarini, Paolo Lazzari, Tomas Lovato, Giorgio Bolzon, Simona Masina, Cosimo Solidoro, and Stefano Salon
Biogeosciences, 19, 4035–4065, https://doi.org/10.5194/bg-19-4035-2022, https://doi.org/10.5194/bg-19-4035-2022, 2022
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Future projections under the RCP8.5 and RCP4.5 emission scenarios of the Mediterranean Sea biogeochemistry at the end of the 21st century show different levels of decline in nutrients, oxygen and biomasses and an acidification of the water column. The signal intensity is stronger under RCP8.5 and in the eastern Mediterranean. Under RCP4.5, after the second half of the 21st century, biogeochemical variables show a recovery of the values observed at the beginning of the investigated period.
Charly A. Moras, Lennart T. Bach, Tyler Cyronak, Renaud Joannes-Boyau, and Kai G. Schulz
Biogeosciences, 19, 3537–3557, https://doi.org/10.5194/bg-19-3537-2022, https://doi.org/10.5194/bg-19-3537-2022, 2022
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This research presents the first laboratory results of quick and hydrated lime dissolution in natural seawater. These two minerals are of great interest for ocean alkalinity enhancement, a strategy aiming to decrease atmospheric CO2 concentrations. Following the dissolution of these minerals, we identified several hurdles and presented ways to avoid them or completely negate them. Finally, we proceeded to various simulations in today’s oceans to implement the strategy at its highest potential.
Taraka Davies-Barnard, Sönke Zaehle, and Pierre Friedlingstein
Biogeosciences, 19, 3491–3503, https://doi.org/10.5194/bg-19-3491-2022, https://doi.org/10.5194/bg-19-3491-2022, 2022
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Biological nitrogen fixation is the largest natural input of new nitrogen onto land. Earth system models mainly represent global total terrestrial biological nitrogen fixation within observational uncertainties but overestimate tropical fixation. The model range of increase in biological nitrogen fixation in the SSP3-7.0 scenario is 3 % to 87 %. While biological nitrogen fixation is a key source of new nitrogen, its predictive power for net primary productivity in models is limited.
Geneviève W. Elsworth, Nicole S. Lovenduski, Kristen M. Krumhardt, Thomas M. Marchitto, and Sarah Schlunegger
EGUsphere, https://doi.org/10.5194/egusphere-2022-579, https://doi.org/10.5194/egusphere-2022-579, 2022
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Anthropogenic climate change will influence marine phytoplankton over the coming century. Here, we quantify the influence of anthropogenic climate change on marine phytoplankton variance using an Earth System Model ensemble, identifying a decline in global phytoplankton biomass variance with warming. Our results suggest that climate mitigation efforts that account for marine phytoplankton changes should also consider changes in phytoplankton variance driven by anthropogenic warming.
Niel Verbrigghe, Niki I. W. Leblans, Bjarni D. Sigurdsson, Sara Vicca, Chao Fang, Lucia Fuchslueger, Jennifer L. Soong, James T. Weedon, Christopher Poeplau, Cristina Ariza-Carricondo, Michael Bahn, Bertrand Guenet, Per Gundersen, Gunnhildur E. Gunnarsdóttir, Thomas Kätterer, Zhanfeng Liu, Marja Maljanen, Sara Marañón-Jiménez, Kathiravan Meeran, Edda S. Oddsdóttir, Ivika Ostonen, Josep Peñuelas, Andreas Richter, Jordi Sardans, Páll Sigurðsson, Margaret S. Torn, Peter M. Van Bodegom, Erik Verbruggen, Tom W. N. Walker, Håkan Wallander, and Ivan A. Janssens
Biogeosciences, 19, 3381–3393, https://doi.org/10.5194/bg-19-3381-2022, https://doi.org/10.5194/bg-19-3381-2022, 2022
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In subarctic grassland on a geothermal warming gradient, we found large reductions in topsoil carbon stocks, with carbon stocks linearly declining with warming intensity. Most importantly, however, we observed that soil carbon stocks stabilised within 5 years of warming and remained unaffected by warming thereafter, even after > 50 years of warming. Moreover, in contrast to the large topsoil carbon losses, subsoil carbon stocks remained unaffected after > 50 years of soil warming.
Roberto Pilli, Ramdane Alkama, Alessandro Cescatti, Werner A. Kurz, and Giacomo Grassi
Biogeosciences, 19, 3263–3284, https://doi.org/10.5194/bg-19-3263-2022, https://doi.org/10.5194/bg-19-3263-2022, 2022
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To become carbon neutral by 2050, the European Union (EU27) forest C sink should increase to −450 Mt CO2 yr-1. Our study highlights that under current management practices (i.e. excluding any policy scenario) the forest C sink of the EU27 member states and the UK may decrease to about −250 Mt CO2eq yr-1 in 2050. The expected impacts of future climate change, however, add a considerable uncertainty, potentially nearly doubling or halving the sink associated with forest management.
Guang Gao, Tifeng Wang, Jiazhen Sun, Xin Zhao, Lifang Wang, Xianghui Guo, and Kunshan Gao
Biogeosciences, 19, 2795–2804, https://doi.org/10.5194/bg-19-2795-2022, https://doi.org/10.5194/bg-19-2795-2022, 2022
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After conducting large-scale deck-incubation experiments, we found that seawater acidification (SA) increased primary production (PP) in coastal waters but reduced it in pelagic zones, which is mainly regulated by local pH, light intensity, salinity, and community structure. In future oceans, SA combined with decreased upward transports of nutrients may synergistically reduce PP in pelagic zones.
Joko Sampurno, Valentin Vallaeys, Randy Ardianto, and Emmanuel Hanert
Biogeosciences, 19, 2741–2757, https://doi.org/10.5194/bg-19-2741-2022, https://doi.org/10.5194/bg-19-2741-2022, 2022
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This study is the first assessment to evaluate the interactions between river discharges, tides, and storm surges and how they can drive compound flooding in the Kapuas River delta. We successfully created a realistic hydrodynamic model whose domain covers the land–sea continuum using a wetting–drying algorithm in a data-scarce environment. We then proposed a new method to delineate compound flooding hazard zones along the river channels based on the maximum water level profiles.
Svenja Dobbert, Roland Pape, and Jörg Löffler
Biogeosciences, 19, 1933–1958, https://doi.org/10.5194/bg-19-1933-2022, https://doi.org/10.5194/bg-19-1933-2022, 2022
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Understanding how vegetation might respond to climate change is especially important in arctic–alpine ecosystems, where major shifts in shrub growth have been observed. We studied how such changes come to pass and how future changes might look by measuring hourly variations in the stem diameter of dwarf shrubs from one common species. From these data, we are able to discern information about growth mechanisms and can thus show the complexity of shrub growth and micro-environment relations.
Jody Daniel, Rebecca C. Rooney, and Derek T. Robinson
Biogeosciences, 19, 1547–1570, https://doi.org/10.5194/bg-19-1547-2022, https://doi.org/10.5194/bg-19-1547-2022, 2022
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The threat posed by climate change to prairie pothole wetlands is well documented, but gaps remain in our ability to make meaningful predictions about how prairie pothole wetlands will respond. We integrate aspects of topography, land cover/land use and climate to model the permanence class of tens of thousands of wetlands at the western edge of the Prairie Pothole Region.
Ádám T. Kocsis, Qianshuo Zhao, Mark J. Costello, and Wolfgang Kiessling
Biogeosciences, 18, 6567–6578, https://doi.org/10.5194/bg-18-6567-2021, https://doi.org/10.5194/bg-18-6567-2021, 2021
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Biodiversity is under threat from the effects of global warming, and assessing the effects of climate change on areas of high species richness is of prime importance to conservation. Terrestrial and freshwater rich spots have been and will be less affected by climate change than other areas. However, marine rich spots of biodiversity are expected to experience more pronounced warming.
Rob Wilson, Kathy Allen, Patrick Baker, Gretel Boswijk, Brendan Buckley, Edward Cook, Rosanne D'Arrigo, Dan Druckenbrod, Anthony Fowler, Margaux Grandjean, Paul Krusic, and Jonathan Palmer
Biogeosciences, 18, 6393–6421, https://doi.org/10.5194/bg-18-6393-2021, https://doi.org/10.5194/bg-18-6393-2021, 2021
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We explore blue intensity (BI) – a low-cost method for measuring ring density – to enhance palaeoclimatology in Australasia. Calibration experiments, using several conifer species from Tasmania and New Zealand, model 50–80 % of the summer temperature variance. The implications of these results have profound consequences for high-resolution paleoclimatology in Australasia, as the speed and cheapness of BI generation could lead to a step change in our understanding of past climate in the region.
Alex R. Quijada-Rodriguez, Pou-Long Kuan, Po-Hsuan Sung, Mao-Ting Hsu, Garett J. P. Allen, Pung Pung Hwang, Yung-Che Tseng, and Dirk Weihrauch
Biogeosciences, 18, 6287–6300, https://doi.org/10.5194/bg-18-6287-2021, https://doi.org/10.5194/bg-18-6287-2021, 2021
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Anthropogenic CO2 is chronically acidifying aquatic ecosystems. We aimed to determine the impact of future freshwater acidification on the physiology and behaviour of an important aquaculture crustacean, Chinese mitten crabs. We report that elevated freshwater CO2 levels lead to impairment of calcification, locomotor behaviour, and survival and reduced metabolism in this species. Results suggest that present-day calcifying invertebrates could be heavily affected by freshwater acidification.
Junrong Zha and Qianlai Zhuang
Biogeosciences, 18, 6245–6269, https://doi.org/10.5194/bg-18-6245-2021, https://doi.org/10.5194/bg-18-6245-2021, 2021
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This study incorporated moss into an extant biogeochemistry model to simulate the role of moss in carbon dynamics in the Arctic. The interactions between higher plants and mosses and their competition for energy, water, and nutrients are considered in our study. We found that, compared with the previous model without moss, the new model estimated a much higher carbon accumulation in the region during the last century and this century.
Maria Belke-Brea, Florent Domine, Ghislain Picard, Mathieu Barrere, and Laurent Arnaud
Biogeosciences, 18, 5851–5869, https://doi.org/10.5194/bg-18-5851-2021, https://doi.org/10.5194/bg-18-5851-2021, 2021
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Expanding shrubs in the Arctic change snowpacks into a mix of snow, impurities and buried branches. Snow is a translucent medium into which light penetrates and gets partly absorbed by branches or impurities. Measurements of light attenuation in snow in Northern Quebec, Canada, showed (1) black-carbon-dominated light attenuation in snowpacks without shrubs and (2) buried branches influence radiation attenuation in snow locally, leading to melting and pockets of large crystals close to branches.
Sazlina Salleh and Andrew McMinn
Biogeosciences, 18, 5313–5326, https://doi.org/10.5194/bg-18-5313-2021, https://doi.org/10.5194/bg-18-5313-2021, 2021
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The benthic diatom communities in Tanjung Rhu, Malaysia, were regularly exposed to high light and temperature variability during the tidal cycle, resulting in low photosynthetic efficiency. We examined the impact of high temperatures on diatoms' photosynthetic capacities, and temperatures beyond 50 °C caused severe photoinhibition. At the same time, those diatoms exposed to temperatures of 40 °C did not show any sign of photoinhibition.
Cornelius Senf and Rupert Seidl
Biogeosciences, 18, 5223–5230, https://doi.org/10.5194/bg-18-5223-2021, https://doi.org/10.5194/bg-18-5223-2021, 2021
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Europe was affected by an extreme drought in 2018. We show that this drought has increased forest disturbances across Europe, especially central and eastern Europe. Disturbance levels observed 2018–2020 were the highest on record for 30 years. Increased forest disturbances were correlated with low moisture and high atmospheric water demand. The unprecedented impacts of the 2018 drought on forest disturbances demonstrate an urgent need to adapt Europe’s forests to a hotter and drier future.
Jessica L. McCarty, Juha Aalto, Ville-Veikko Paunu, Steve R. Arnold, Sabine Eckhardt, Zbigniew Klimont, Justin J. Fain, Nikolaos Evangeliou, Ari Venäläinen, Nadezhda M. Tchebakova, Elena I. Parfenova, Kaarle Kupiainen, Amber J. Soja, Lin Huang, and Simon Wilson
Biogeosciences, 18, 5053–5083, https://doi.org/10.5194/bg-18-5053-2021, https://doi.org/10.5194/bg-18-5053-2021, 2021
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Fires, including extreme fire seasons, and fire emissions are more common in the Arctic. A review and synthesis of current scientific literature find climate change and human activity in the north are fuelling an emerging Arctic fire regime, causing more black carbon and methane emissions within the Arctic. Uncertainties persist in characterizing future fire landscapes, and thus emissions, as well as policy-relevant challenges in understanding, monitoring, and managing Arctic fire regimes.
Alexander J. Winkler, Ranga B. Myneni, Alexis Hannart, Stephen Sitch, Vanessa Haverd, Danica Lombardozzi, Vivek K. Arora, Julia Pongratz, Julia E. M. S. Nabel, Daniel S. Goll, Etsushi Kato, Hanqin Tian, Almut Arneth, Pierre Friedlingstein, Atul K. Jain, Sönke Zaehle, and Victor Brovkin
Biogeosciences, 18, 4985–5010, https://doi.org/10.5194/bg-18-4985-2021, https://doi.org/10.5194/bg-18-4985-2021, 2021
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Satellite observations since the early 1980s show that Earth's greening trend is slowing down and that browning clusters have been emerging, especially in the last 2 decades. A collection of model simulations in conjunction with causal theory points at climatic changes as a key driver of vegetation changes in natural ecosystems. Most models underestimate the observed vegetation browning, especially in tropical rainforests, which could be due to an excessive CO2 fertilization effect in models.
Vincent Niderkorn, Annette Morvan-Bertrand, Aline Le Morvan, Angela Augusti, Marie-Laure Decau, and Catherine Picon-Cochard
Biogeosciences, 18, 4841–4853, https://doi.org/10.5194/bg-18-4841-2021, https://doi.org/10.5194/bg-18-4841-2021, 2021
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Climate change can change vegetation characteristics in grasslands with a potential impact on forage chemical composition and quality, as well as its use by ruminants. Using controlled conditions mimicking a future climatic scenario, we show that forage quality and ruminant digestion are affected in opposite ways by elevated atmospheric CO2 and an extreme event (heat wave, severe drought), indicating that different factors of climate change have to be considered together.
Verónica Pancotto, David Holl, Julio Escobar, María Florencia Castagnani, and Lars Kutzbach
Biogeosciences, 18, 4817–4839, https://doi.org/10.5194/bg-18-4817-2021, https://doi.org/10.5194/bg-18-4817-2021, 2021
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We investigated the response of a wetland plant community to elevated temperature conditions in a cushion bog on Tierra del Fuego, Argentina. We measured carbon dioxide fluxes at experimentally warmed plots and at control plots. Warmed plant communities sequestered between 55 % and 85 % less carbon dioxide than untreated control cushions over the main growing season. Our results suggest that even moderate future warming could decrease the carbon sink function of austral cushion bogs.
Melissa A. Ward, Tessa M. Hill, Chelsey Souza, Tessa Filipczyk, Aurora M. Ricart, Sarah Merolla, Lena R. Capece, Brady C O'Donnell, Kristen Elsmore, Walter C. Oechel, and Kathryn M. Beheshti
Biogeosciences, 18, 4717–4732, https://doi.org/10.5194/bg-18-4717-2021, https://doi.org/10.5194/bg-18-4717-2021, 2021
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Salt marshes and seagrass meadows ("blue carbon" habitats) can sequester and store high levels of organic carbon (OC), helping to mitigate climate change. In California blue carbon sediments, we quantified OC storage and exchange between these habitats. We find that (1) these salt marshes store about twice as much OC as seagrass meadows do and (2), while OC from seagrass meadows is deposited into neighboring salt marshes, little of this material is sequestered as "long-term" carbon.
Damien Couespel, Marina Lévy, and Laurent Bopp
Biogeosciences, 18, 4321–4349, https://doi.org/10.5194/bg-18-4321-2021, https://doi.org/10.5194/bg-18-4321-2021, 2021
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An alarming consequence of climate change is the oceanic primary production decline projected by Earth system models. These coarse-resolution models parameterize oceanic eddies. Here, idealized simulations of global warming with increasing resolution show that the decline in primary production in the eddy-resolved simulations is half as large as in the eddy-parameterized simulations. This stems from the high sensitivity of the subsurface nutrient transport to model resolution.
Wu Ma, Lu Zhai, Alexandria Pivovaroff, Jacquelyn Shuman, Polly Buotte, Junyan Ding, Bradley Christoffersen, Ryan Knox, Max Moritz, Rosie A. Fisher, Charles D. Koven, Lara Kueppers, and Chonggang Xu
Biogeosciences, 18, 4005–4020, https://doi.org/10.5194/bg-18-4005-2021, https://doi.org/10.5194/bg-18-4005-2021, 2021
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We use a hydrodynamic demographic vegetation model to estimate live fuel moisture dynamics of chaparral shrubs, a dominant vegetation type in fire-prone southern California. Our results suggest that multivariate climate change could cause a significant net reduction in live fuel moisture and thus exacerbate future wildfire danger in chaparral shrub systems.
Bertold Mariën, Inge Dox, Hans J. De Boeck, Patrick Willems, Sebastien Leys, Dimitri Papadimitriou, and Matteo Campioli
Biogeosciences, 18, 3309–3330, https://doi.org/10.5194/bg-18-3309-2021, https://doi.org/10.5194/bg-18-3309-2021, 2021
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The drivers of the onset of autumn leaf senescence for several deciduous tree species are still unclear. Therefore, we addressed (i) if drought impacts the timing of autumn leaf senescence and (ii) if the relationship between drought and autumn leaf senescence depends on the tree species. Our study suggests that the timing of autumn leaf senescence is conservative across years and species and even independent of drought stress.
Anna Katavouta and Richard G. Williams
Biogeosciences, 18, 3189–3218, https://doi.org/10.5194/bg-18-3189-2021, https://doi.org/10.5194/bg-18-3189-2021, 2021
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Diagnostics of the latest-generation Earth system models reveal the ocean will continue to absorb a large fraction of the anthropogenic carbon released to the atmosphere in the next century, with the Atlantic Ocean storing a large amount of this carbon relative to its size. The ability of the ocean to absorb carbon will reduce in the future as the ocean warms and acidifies. This reduction is larger in the Atlantic Ocean due to a weakening of the meridional overturning with changes in climate.
Genevieve Jay Brett, Daniel B. Whitt, Matthew C. Long, Frank Bryan, Kate Feloy, and Kelvin J. Richards
Biogeosciences, 18, 3123–3145, https://doi.org/10.5194/bg-18-3123-2021, https://doi.org/10.5194/bg-18-3123-2021, 2021
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We quantify one form of uncertainty in modeled 21st-century changes in phytoplankton growth. The supply of nutrients from deep to surface waters decreases in the warmer future ocean, but the effect on phytoplankton growth also depends on changes in available light, how much light and nutrient the plankton need, and how fast they can grow. These phytoplankton properties can be summarized as a biological timescale: when it is short, future growth decreases twice as much as when it is long.
Sean M. Ridge and Galen A. McKinley
Biogeosciences, 18, 2711–2725, https://doi.org/10.5194/bg-18-2711-2021, https://doi.org/10.5194/bg-18-2711-2021, 2021
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Approximately 40 % of the CO2 emissions from fossil fuel combustion and cement production have been absorbed by the ocean. The goal of the UNFCCC Paris Agreement is to reduce humanity's emissions so as to limit global warming to no more than 2 °C, and ideally less than 1.5 °C. If we achieve this level of mitigation, the ocean's uptake of carbon will be strongly reduced. Excess carbon trapped in the near-surface ocean will begin to mix back to the surface and will limit additional uptake.
Alexander Koch, Chris Brierley, and Simon L. Lewis
Biogeosciences, 18, 2627–2647, https://doi.org/10.5194/bg-18-2627-2021, https://doi.org/10.5194/bg-18-2627-2021, 2021
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Estimates of large-scale tree planting and forest restoration as a carbon sequestration tool typically miss a crucial aspect: the Earth system response to the increased land carbon sink from new vegetation. We assess the impact of tropical forest restoration using an Earth system model under a scenario that limits warming to 2 °C. Almost two-thirds of the carbon impact of forest restoration is offset by negative carbon cycle feedbacks, suggesting a more modest benefit than in previous studies.
Wei Min Hao, Matthew C. Reeves, L. Scott Baggett, Yves Balkanski, Philippe Ciais, Bryce L. Nordgren, Alexander Petkov, Rachel E. Corley, Florent Mouillot, Shawn P. Urbanski, and Chao Yue
Biogeosciences, 18, 2559–2572, https://doi.org/10.5194/bg-18-2559-2021, https://doi.org/10.5194/bg-18-2559-2021, 2021
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We examined the trends in the spatial and temporal distribution of the area burned in northern Eurasia from 2002 to 2016. The annual area burned in this region declined by 53 % during the 15-year period under analysis. Grassland fires in Kazakhstan dominated the fire activity, comprising 47 % of the area burned but accounting for 84 % of the decline. A wetter climate and the increase in grazing livestock in Kazakhstan are the major factors contributing to the decline in the area burned.
Cited articles
Arrigo, K. R.: Marine microorganisms and global nutrient cycles, Nature,
437, 349–355, 2005.
Augustinus, P., Barton, C. E., Zawadzki, A., and Harle, K.: Lithological and
geochemical record of mining-induced changes in sediments from Macquarie
Harbour, southwest Tasmania, Australia, Environ. Earth Sci., 61,
625–639, 2010.
Austin, W. E. and Inall, M. E.: Deep-water renewal in a Scottish fjord:
temperature, salinity and oxygen isotopes, Polar Res., 21, 251–257,
2002.
Baker, W. E. and Ahmad, N.: Re-examination of the fjord theory of Port
Davey, Tasmania, Papers and Proceedings of the Royal Society of Tasmania,
93, 113–116, 1959.
Bennett, J. C., Ling, F. L. N., Graham, B., Grose, M. R., Corney, S. P.,
White, C. J., Holz, G. K., Post, D. A., Gaynor, S. M., and Bindoff, N. L.:
Climate Futures for Tasmania: water and catchments technical report,
Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart,
Tasmania, Antarctic Climate and Ecosystems Cooperative Research Centre, ISBN 978-1-921197-06-8, 2010.
Bianchi, T. S., Cui, X., Blair, N. E., Burdige, D. J., Eglinton, T. I., and
Galy, V.: Centers of organic carbon burial and oxidation at the land-ocean
interface, Org. Geochem., 115, 138–155, 2018.
Bianchi, T. S., Arndt, S., Austin, W. E., Benn, D. I., Bertrand, S., Cui,
X., Faust, J., Koziorowska-Makuch, K., Moy, C., Savage, C., Smeaton, C.,
Smith, R., and Syvitski, J.: Fjords as aquatic critical zones (ACZs),
Earth-Sci. Rev., 203, 103145, https://doi.org/10.1016/j.earscirev.2020.103145, 2020.
Breitburg, D., Levin, L. A., Oschlies, A., Grégoire, M., Chavez, F. P.,
Conley, D. J., Garçon, V., Gilbert, D., Gutiérrez, D., Isensee, K.,
and Jacinto, G. S.: Declining oxygen in the global ocean and coastal waters,
Science, 359, https://doi.org/10.1126/science.aam7240, 2018.
Brooks, K. M.: Salmon Farm Benthic and Shellfish Effects Study 1996–1997, Aquatic Environmental Sciences, 644 Old Eaglemount Road, Port Townsend, WA 98368, 117, 2000.
Cage, A. G.: The modern and late Holocene marine environments of Loch Sunart, NW Scotland, Doctoral dissertation, University of St Andrews, University of St. Andrews, http://hdl.handle.net/10023/15910 (last access: 23 June 2022), 2006.
Calvete, C. and Sobarzo, M.: Quantification of the surface brackish water
layer and frontal zones in southern Chilean fjords between Boca del Guafo
(43∘30′ S) and Estero Elefantes (46∘30′ S), Cont. Shelf Res., 31, 162–171, 2011.
Carpenter, P. D., Butler, E. C. V., Higgins, H. W., Mackey, D. J., and Nichols, P. D.: Chemistry of trace elements, humic substances and
sedimentary organic matter in Macquarie Harbour, Tasmania, Mar. Freshwater Res., 42, 625–654, 1991.
Codispoti, L. A., Yoshinari, T., and Devol, A. H.: Suboxic respiration in
the oceanic water column, in Respiration in Aquatic Ecosystems, edited by:
del Giorgio, P. and Williams, P., Oxford University Press, 225–247,
https://doi.org/10.1093/acprof:oso/9780198527084.001.0001, 2005.
Cracknell, M. J., Nascimento, S. C., Heng, W. X., Parbhakar-Fox, A., and Schaap, T. A.: Geophysical investigation of mine waste in the King River
Delta, Macquarie Harbour, Tasmania, ASEG Extended Abstracts, 1, 1–4, 2019.
Crawford, C.: Environmental management of marine aquaculture in Tasmania,
Australia, Aquaculture, 226, 129–138, 2003.
Crawford, C. M., Mitchell, I. M., and Macleod, C. K. A.: Video assessment
of environmental impacts of salmon farms, ICES J. Mar. Sci.,
58, 445–452, 2001.
Cresswell, G. R., Edwards, R. J., and Barker, B. A.: Macquarie Harbour,
Tasmania-seasonal oceanographic surveys in 1985, Papers and Proceedings
of the Royal Society of Tasmania, 123, 63–66, 1989.
Da Silva, R. R. P., White, C. A., Bowman, J. P., Raes, E., Bisset, A.,
Chapman, C., Bodrossy, L., and Ross, D. J.: Environmental influences shaping
microbial communities in a low oxygen, highly stratified marine embayment,
Aquat. Microb. Ecol., 87, 185–203, 2021.
del Giorgio, P. and Williams, P. (Eds.): Respiration in aquatic
ecosystems, Oxford University Press,
https://doi.org/10.1093/acprof:oso/9780198527084.001.0001, 2005.
De Mello, N. A. S. T., Brighenti, L. S., Barbosa, F. A. R., Staehr, P. A.,
and Bezerra Neto, J. F.: Spatial variability of methane (CH4)
ebullition in a tropical hypereutrophic reservoir: silted areas as a bubble
hot spot, Lake Reserv. Manage., 34, 105–114, 2018.
Dey, R., Lewis, S. C., Arblaster, J. M., and Abram, N. J.: A review of past
and projected changes in Australia's rainfall, WIRES Clim. Change, 10, e577, https://doi.org/10.1002/wcc.577, 2018.
Diaz, R. J. and Rosenberg, R.: Spreading dead zones and consequences for
marine ecosystems, Science, 321, 926–929, 2008.
Edgar, G. J., Barrett, N. S., and Last, P. R.: The distribution of
macroinvertebrates and fishes in Tasmanian estuaries, J. Biogeogr., 26, 1169–1189, 1999.
Edwards, A. and Edelsten, D. J.: Deep water renewal of Loch Etive: a three
basin Scottish fjord, Estuar. Coast. Mar. Sci., 5, 575–595,
1977.
Eriksen, R. S., Mackey, D. J., van Dam, R., and Nowak, B.: Copper
speciation and toxicity in Macquarie Harbour, Tasmania: an investigation
using a copper ion selective electrode, Mar. Chem., 74, 99–113,
2001.
Featherstone, A. M. and O'Grady, B. V.: Removal of dissolved copper and
iron at the freshwater-saltwater interface of an acid mine stream, Mar. Pollut. Bull., 34, 332–337, https://doi.org/10.1016/S0025-326X(96)00089-6, 1997.
Fogt, R. L. and Marshall, G. J.: The Southern annular mode: Variability,
trends, and climate impacts across the Southern Hemisphere, WIRES Clim. Change, 11, e652, https://doi.org/10.1002/wcc.652, 2020.
Frey, C., Bange, H. W., Achterberg, E. P., Jayakumar, A., Löscher, C. R., Arévalo-Martínez, D. L., León-Palmero, E., Sun, M., Sun, X., Xie, R. C., Oleynik, S., and Ward, B. B.: Regulation of nitrous oxide production in low-oxygen waters off the coast of Peru, Biogeosciences, 17, 2263–2287, https://doi.org/10.5194/bg-17-2263-2020, 2020.
Gade, H. G. and Edwards, A.: Deep water renewal in fjords, in: Fjord
oceanography, edited by: Freeland, H. J, Farmer, D. M., and Levings, C. D.,
Springer, Boston, MA, 453–489, ISBN: 978-1-4613-3107-0, 1980.
Geyer, W. R. and Cannon, G. A.: Sill processes related to deep water
renewal in a fjord, J. Geophys. Res.-Oceans, 87,
7985–7996, 1982.
Gilbert, D., Rabalais, N. N., Díaz, R. J., and Zhang, J.: Evidence for greater oxygen decline rates in the coastal ocean than in the open ocean, Biogeosciences, 7, 2283–2296, https://doi.org/10.5194/bg-7-2283-2010, 2010.
Gillibrand, P. A. and Turrell, W. R.: The use of simple models in the
regulation of the impact of fish farms on water quality in Scottish sea
lochs, Aquaculture, 159, 33–46, 1997.
Gillibrand, P. A., Cage, A. G., and Austin, W. E.: A preliminary
investigation of basin water response to climate forcing in a Scottish
fjord: evaluating the influence of the NAO, Cont. Shelf Res.,
25, 571–587, 2005.
Gillibrand, P. A., Cromey, C. J., Black, K. D., Inall, M. E., and Gontarek,
S. J.: Identifying the risk of deoxygenation in Scottish sea lochs with
isolated deep water, in: Scottish Aquaculture Research Forum, SARF, 7, Scottish Association for Marine Science Dunstaffnage Marine Laboratory Oban Argyll PA37 1QA, February 2006.
Gonsior, M., Peake, B. M., Cooper, W. J., Jaffé, R., Young, H., Kahn, A.
E., and Kowalczuk, P.: Spectral characterization of chromophoric dissolved
organic matter (CDOM) in a fjord (Doubtful Sound, New Zealand), Aquat.
Sci., 70, 397–409, 2008.
Goreau, T. J., Kaplan, W. A., Wofsy, S. C., McElroy, M. B., Valois, F. W., and Watson, S. W.: Production of NO2-and N2O by nitrifying
bacteria at reduced concentrations of oxygen, Appl. Environ.
Microb., 40, 526–532, 1980.
Goyal, R., England, M. H., Jucker, M., and Sen Gupta, A.: Response of
Southern Hemisphere western boundary current regions to future zonally
symmetric and asymmetric atmospheric changes, J. Geophys.
Res.-Oceans, 126, e2021JC017858, https://doi.org/10.1029/2021JC017858, 2021.
Grose, M. R., Barnes-Keoghan, I., Corney S. P., White C. J., Holz, G. K.,
Bennett, J. B., Gaynor, S. M., and Bindof, N. L.: Climate Futures for
Tasmania: general climate impacts technical report, Antarctic Climate and
Ecosystems Cooperative Research Centre, Hobart, Tasmania, ISBN 978-1-921197-05-5, 2010.
Gupta, G. V. M., Jyothibabu, R., Ramu, C. V., Reddy, A. Y., Balachandran, K.
K., Sudheesh, V., Kumar, S., Chari, N. V. H. K., Bepari, K. F., Marathe, P.
H., and Reddy, B. B.: The world's largest coastal deoxygenation zone is not
anthropogenically driven, Environ. Res. Lett., 16, p. 054009, https://doi.org/10.1088/1748-9326/abe9eb, 2021.
Hartstein, N. D.: Supply and dispersal of mussel farm debris and its impacts
on benthic habitats in contrasting hydrodynamic regimes, PhD thesis,
University of Auckland, ResearchSpace@Auckland, 2003.
Hartstein, N. D., Maxey, J. D., Loo, J. C. H., and Then, A. Y. H.: Drivers
of deep water renewal in Macquarie Harbour, Tasmania, J. Marine
Syst., 199, 103226, https://doi.org/10.1016/j.jmarsys.2019.103226, 2019.
Hartstein, N., Maxey, J. D., and Kerroux, A.: Potential Causes of Beggiatoa
Coverage in and Around Franklin Lease and Macquarie Harbour, a Report to the
Tasmanian Salmonid Growers Association from Aquadynamic Solutions, Sdn. Bhd., Kota
Kinabalu, Sabah, Malaysia, Aquadynamic Solutions Sdn. Bhd., 2016.
Hemer, M. A. and Griffin, D. A.: The wave energy resource along
Australia's Southern margin, J. Renew. Sustain. Ener.,
2, 043108, https://doi.org/10.1063/1.3464753, 2010.
Hemer, M. A., Church, J. A., and Hunter, J. R.: Variability and trends in
the directional wave climate of the Southern Hemisphere, Int.
J. Climatol., 30, 475–491, 2010.
Hill, K. J., Santoso, A., and England, M. H.: Interannual Tasmanian
rainfall variability associated with large-scale climate modes, J. Climate, 22, 4383–4397, 2009.
Inall, M. E. and Gillibrand, P. A.: The physics of mid-latitude fjords: a review, in: Fjord Systems and Archives, edited by: Howe, J., Austin, W., Forwick, M., and Paetzel, M., The Geological Society, 17–33, https://doi.org/10.1144/SP344.3, 2010.
Ji, Q., Frey, C., Sun, X., Jackson, M., Lee, Y.-S., Jayakumar, A., Cornwell, J. C., and Ward, B. B.: Nitrogen and oxygen availabilities control water column nitrous oxide production during seasonal anoxia in the Chesapeake Bay, Biogeosciences, 15, 6127–6138, https://doi.org/10.5194/bg-15-6127-2018, 2018.
Ji, Q., Jameson, B. D., Juniper, S. K., and Grundle, D. S.: Temporal and
vertical oxygen gradients modulate nitrous oxide production in a seasonally
anoxic fjord: Saanich Inlet, British Columbia, J. Geophys.
Res.-Biogeo., 125, e2020JG005631, https://doi.org/10.1029/2020JG005631, 2020.
Keeling, R. F., Körtzinger, A., and Gruber, N.: Ocean deoxygenation in
a warming world, Annu. Rev. Mar. Sci., 2, 199–229, 2010.
Keith, D. A., Ferrer-Paris, J. R., Nicholson, E., and Kingsford, R. T.
(Eds.): The IUCN Global Ecosystem Typology 2.0: Descriptive profiles for
biomes and ecosystem functional groups, Gland, Switzerland: IUCN,
https://doi.org/10.2305/IUCN.CH.2020.13.en, 2020.
Kiernan, K.: The Extent of Late Cenozoic Glaciation in the Central Highlands
of Tasmania, Australia, Arctic Alpine Res., 22, 341–354.
https://doi.org/10.2307/1551459, 1990.
Kiernan, K.: Glacial history of the upper Derwent Valley, Tasmania, New Zeal. J. Geol. Geop., 34, 157–166,
https://doi.org/10.1080/00288306.1991.9514453, 1991.
Kiernan, K.: A reconnaissance of the geomorphology and glacial history of
the upper Gordon River Valley, Tasmania, Tasforests, 7, 51–76, 1995.
King, R. D.: Limnology of the Gordon River Basin, Tasmania, and its
meromictic lakes, Doctoral Dissertation, University of Tasmania, 1980.
King, R. D. and Tyler, P. A.: Meromictic lakes of south-west Tasmania,
Mar. Freshwater Res., 32, 741–756, 1981.
King, R. D. and Tyler, P. A.: Downstream effects of the Gordon River Power
Development, south-west Tasmania, Mar. Freshwater Res., 33,
431–442, 1982.
Kirkpatrick, J. B., Nunez, M., Bridle, K. L., Parry, J., and Gibson, N.: Causes
and consequences of variation in snow incidence on the high mountains of
Tasmania, 1983–2013, Aust. J. Bot., 65, 214–224,
https://doi.org/10.1071/BT16179, 2017.
Koehnken, L.: Water Quality in the King River and Macquarie Harbour,
Tasmania: Pre-and Post-Mount Lyell Mine Closure, in: Hydrology and Water
Resources Symposium 1996: Water and the Environment, Barton, ACT: Institution of Engineers, Australia, 1996, 157–162, National conference publication, Institution of Engineers, Australia, ; no. 96/05, ISBN: 0858256495, 2006.
Lam, P. and Kuypers, M. M.: Microbial nitrogen cycling processes in oxygen
minimum zones, Ann. Rev. Mar. Sci., 3, 317–345, 2011.
Levin, L. A. and Breitburg, D. L.: Linking coasts and seas to address
ocean deoxygenation, Nat. Clim. Change, 5, 401–403, 2015.
Li, Y., Xie, H., Scarratt, M., Damm, E., Bourgault, D., Galbraith, P. S., and Wallace, D. W.: Dissolved methane in the water column of the Saguenay Fjord, Mar. Chem., 230, 103926, https://doi.org/10.51200/bjomsa.v1i0.995, 2021.
Liu, L., Wilkinson, J., Koca, K., Buchmann, C., and Lorke, A.: The role of
sediment structure in gas bubble storage and release, J. Geophys. Res.-Biogeo., 121, 1992–2005, 2016.
Lucieer, V.: SeaMap Tasmania Bathymetric Data, Institute for
Marine and Antarctic Studies, University of Tasmania [data set], https://doi.org/10.1016/j.ecss.2020.107016, 2007.
Marshall, G. and National Center for Atmospheric Research Staff (Eds): The Climate Data Guide: Marshall Southern Annular Mode (SAM) Index
(Station-based), https://climatedataguide.ucar.edu/climate-data/marshall-southern-annular-mode-sam-index-station-based
(last access: 20 January 2022), 2018.
Mau, S., Blees, J., Helmke, E., Niemann, H., and Damm, E.: Vertical distribution of methane oxidation and methanotrophic response to elevated methane concentrations in stratified waters of the Arctic fjord Storfjorden (Svalbard, Norway), Biogeosciences, 10, 6267–6278, https://doi.org/10.5194/bg-10-6267-2013, 2013.
Maxey, J. D., Hartstein, N. D., Penjinus, D., and Kerroux, A.: Simple
quality control technique to identify dissolved oxygen diffusion issues with
biochemical oxygen demand bottle incubations, BJoMSA, 1, 2017.
Maxey, J. D., Hartstein, N. D., Then, A. Y. H., and Barrenger, M.:
Dissolved oxygen consumption in a fjord-like estuary, Macquarie Harbour,
Tasmania, Estuar. Coast. Shelf S., 246, 107016, https://doi.org/10.1016/j.ecss.2020.107016, 2020.
Meneghini, B., Simmonds, I., and Smith, I. N.: Association between
Australian rainfall and the southern annular mode, Int. J.
Climatol., 27, 109–121,
2007.
MHDOWG (Macquarie Harbour Dissolved Oxygen Working Group): Final Report to the Tasmanian Salmonid Growers Association, 2014.
Oschlies, A., Brandt, P., Stramma, L., and Schmidtko, S.: Drivers and
mechanisms of ocean deoxygenation, Nat. Geosci., 11, 467–473, 2018.
Pereira, P. M., Black, K. D., McLusky, D. S., and Nickell, T. D.: Recovery
of sediments after cessation of marine fish farm production, Aquaculture,
235, 315–330, 2004.
Pickard, G. L. and Stanton, B. R.: Pacific fjords-a review of their water
characteristics, Fjord Oceanography, edited by: Freeland, H. J., Farmer, D. M., and Levings, C. D., Fjord oceanography, Plenum Press, New York, 1–51, 1980.
Pitcher, G. C., Aguirre-Velarde, A., Breitburg, D., et al.: System controls of coastal and
open ocean oxygen depletion, Prog. Oceanogr., p. 102613, https://doi.org/10.1016/j.pocean.2021.102613, 2021.
Priestley, M. D. and Catto, J. L.: Future changes in the extratropical
storm tracks and cyclone intensity, wind speed, and structure, Weather and
Climate Dynamics Discussions, 3, 1–40, https://doi.org/10.5194/wcd-3-337-2022, 2021.
Rabalais, N. N., Díaz, R. J., Levin, L. A., Turner, R. E., Gilbert, D., and Zhang, J.: Dynamics and distribution of natural and human-caused hypoxia, Biogeosciences, 7, 585–619, https://doi.org/10.5194/bg-7-585-2010, 2010.
Reeburgh, W. S.: Oceanic methane biogeochemistry, Chem. Rev., 107,
486–513, 2007.
Rosenberg, R.: Benthic macrofaunal dynamics, production, and dispersion in
an oxygen-deficient estuary of west Sweden, J. Exp. Mar.
Biol. Ecol., 26, 107–133, 1977.
Sharples, C., Walford, H., Watson, C., Ellison, J. C., Hua, Q., Bowden, N., and Bowman, D.: Ocean Beach, Tasmania: A swell-dominated shoreline reaches
climate-induced recessional tipping point?, Mar. Geol., 419, https://doi.org/10.1016/j.margeo.2019.106081,
2020.
Skogen, M. D., Eknes, M., Asplin, L. C., and Sandvik, A. D.: Modelling the
environmental effects of fish farming in a Norwegian fjord, Aquaculture,
298, 70–75, 2009.
Smith, R. W., Bianchi, T. S., Allison, M., Savage, C., and Galy, V.: High
rates of organic carbon burial in fjord sediments globally, Nat.
Geosci., 8, 450–453, 2015.
Stanton, B. R. and Pickard, G. L.: Physical oceanography of the New
Zealand fjords, in: Fjord oceanography, edited by: Freeland, H. J,
Farmer, D. M., and Levings, C. D., Springer, Boston, MA, 453–489, 329-332, ISBN: 978-1-4613-3107-0, 1980.
Stauber, J. L., Benning, R. J., Hales, L. T., Eriksen, R., and Nowak, B.:
Copper bioavailability and amelioration of toxicity in Macquarie Harbour,
Tasmania, Australia, Mar. Freshwater Res., 51, 1–10, 2000.
Taschetto, A. S. and England, M. H.: An analysis of late twentieth century
trends in Australian rainfall, Int. J. Climatol., 29, 791–807, 2009.
Teasdale, P. R., Apte, S. C., Ford, P. W., Batley, G. E., and Koehnken, L.:
Geochemical cycling and speciation of copper in waters and sediments of
Macquarie Harbour, Western Tasmania, Estuar. Coast. Shelf S.,
57, 475–487, 2003.
Viney, N. R., Post, D. A., Yang, A., Willis, M., Robinson, K. A., Bennett,
J. C., Ling, F. L. N., and Marvanek, S.: Rainfall-runoff modelling for
Tasmania, A report to the Australian Government from the CSIRO Tasmania
Sustainable Yields Project, CSIRO Water for a Healthy Country Flagship,
Australia, https://doi.org/10.4225/08/585c15667ff2b, 2009.
Walinsky, S. E., Prahl, F. G., Mix, A. C., Finney, B. P., Jaeger, J. M., and Rosen, G. P.: Distribution and composition of organic matter in surface
sediments of coastal Southeast Alaska, Cont. Shelf Res., 29,
1565–1579, 2009.
Walker, K. F.: A review of the ecological effects of river regulation in
Australia, Perspectives in Southern Hemisphere Limnology, 28, 111–129, https://doi.org/10.1007/978-94-009-5522-6_8, 1985.
Wang, Y., Hendy, I., and Napier, T. J.: Climate and anthropogenic controls
of coastal deoxygenation on interannual to centennial timescales,
Geophys. Res. Lett., 44, 11–528, 2017.
Willis, M.: Tascatch Variation 2 – Surface Water Models, Department of Primary Industries and Water, Hydro Tasmania
Consulting, document ID no.: WR 2008/005,
https://nre.tas.gov.au/water/water-monitoring-and-assessment/hydrological-assessment/tasmanian-catchments-modelling/surface-water-models (last access: 15 April 2022), 2008.
Ye, W., Zhang, G., Zheng, W., Zhang, H., and Wu, Y.: Methane distributions
and sea-to-air fluxes in the Pearl River Estuary and the northern South
China sea, Deep-Sea Res. Pt., 167,
34–45, 2019.
Short summary
Deep coastal inlets are important sites for regulating land-based organic pollution before it enters coastal oceans. This study focused on how large climate forces, rainfall, and river flow impact organic loading and oxygen conditions in a coastal inlet in Tasmania. Increases in rainfall were linked to higher organic loading and lower oxygen in basin waters. Finally we observed a significant correlation between the Southern Annular Mode and oxygen concentrations in the system's basin waters.
Deep coastal inlets are important sites for regulating land-based organic pollution before it...
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