Articles | Volume 18, issue 24
https://doi.org/10.5194/bg-18-6393-2021
© Author(s) 2021. 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-18-6393-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Dec 2021
Research article |
| 14 Dec 2021
| 14 Dec 2021
Evaluating the dendroclimatological potential of blue intensity on multiple conifer species from Tasmania and New Zealand
School of Earth & Environmental Sciences, University of St.
Andrews, St. Andrews, UK
Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA
Kathy Allen
School of Ecosystem and Forest Sciences, University of Melbourne, 500
Yarra Boulevard, Richmond 3121, Australia
Patrick Baker
School of Ecosystem and Forest Sciences, University of Melbourne, 500
Yarra Boulevard, Richmond 3121, Australia
Gretel Boswijk
Tree-Ring Laboratory, School of Environment, The University of
Auckland, Private Bag 92019, Auckland, New Zealand
Brendan Buckley
Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA
Edward Cook
Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA
Rosanne D'Arrigo
Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA
Dan Druckenbrod
Department of Geological, Environmental, and Marine Sciences, Rider
University, 2083 Lawrenceville Rd, Lawrenceville, NJ, 08648, USA
Anthony Fowler
Tree-Ring Laboratory, School of Environment, The University of
Auckland, Private Bag 92019, Auckland, New Zealand
Margaux Grandjean
School of Earth & Environmental Sciences, University of St.
Andrews, St. Andrews, UK
Paul Krusic
Department of Geography, University of Cambridge, Cambridge, UK
Department of Physical Geography, Stockholm University, Stockholm, Sweden
Jonathan Palmer
ARC Centre of Excellence in Australian Biodiversity and Heritage,
School of Biological, Earth and Environmental Sciences, University of New
South Wales, Sydney, NSW 2052, Australia
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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.
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The 1809 eruption is one of the most recent unidentified volcanic eruptions with a global climate impact. We demonstrate that climate model simulations of the 1809 eruption show generally good agreement with many large-scale temperature reconstructions and early instrumental records for a range of radiative forcing estimates. In terms of explaining the spatially heterogeneous and temporally delayed Northern Hemisphere cooling suggested by tree-ring networks, the investigation remains open.
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Alkalinity biases in CMIP6 Earth system models and implications for simulated CO2 drawdown via artificial alkalinity enhancement
Experiments of the efficacy of tree ring blue intensity as a climate proxy in central and western China
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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.
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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.
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Marcus Breil, Annabell Weber, and Joaquim G. Pinto
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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.
Marcus Breil, Vanessa Schneider, and Joaquim Pinto
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-94, https://doi.org/10.5194/bg-2023-94, 2023
Revised manuscript accepted for BG
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The general impact of afforestation on the regional climate conditions in Europe during the period 1986–2015 is investigated. For this purpose, a regional climate model simulation is performed, in which afforestation during this period is considered, and results are compared to a simulation in which this is not the case. Results show that afforestation had discernible impacts on the climate change signal in Europe, which may have mitigated the local warming trend especially in summer in Europe.
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.
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.
Johnathan Daniel Maxey, Neil David Hartstein, Aazani Mujahid, and Moritz Müller
Biogeosciences, 19, 3131–3150, https://doi.org/10.5194/bg-19-3131-2022, https://doi.org/10.5194/bg-19-3131-2022, 2022
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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.
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.
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.
Cited articles
Allen, K. J., Cook, E. R., Francey, R. J., and Michael, K.: The climatic
response of Phyllocladus aspleniifolius (Labill.) Hook. f in Tasmania,
J. Biogeogr., 28, 305–316, https://doi.org/10.1046/j.1365-2699.2001.00546.x, 2002.
Allen, K. J., Ogden, J., Buckley, B. M., Cook, E. R., and Baker, P. J.: The
potential to reconstruct broadscale climate indices associated with
southeast Australian droughts from Athrotaxis species, Tasmania, Clim.
Dynam., 37, 1799–1821, https://doi.org/10.1007/s00382-011-1011-7,
2011.
Allen, K. J., Lee, G., Ling, F., Allie, S., Willis, M., and Baker, P. J.:
Palaeohydrology in climatological context: developing the case for use of
remote predictors in Australian streamflow reconstructions, Appl. Geogr., 64, 132–152, https://doi.org/10.1016/j.apgeog.2015.09.007, 2015a.
Allen, K. J., Nichols, S. C., Evans, R., Cook, E. R., Allie, S., Carson, G.,
Ling, F., and Baker, P. J.: Preliminary December–January inflow and
streamflow reconstructions from tree rings for western Tasmania,
southeastern Australia, Water Resour. Res., 51, 5487–5503, https://doi.org/10.1002/2015WR017062, 2015b.
Allen, K. J., Fenwick, P., Palmer, J. G., Nichols, S. C., Cook, E. R., Buckley,
B. M., and Baker, P. J.: A 1700-year Athrotaxis selaginoides tree-ring width
chronology from southeastern Australia, Dendrochronologia, 45, 90–100,
https://doi.org/10.1016/j.dendro.2017.07.004, 2017.
Allen, K. J., Cook, E. R., Evans, R., Francey, R., Buckley, B. M., Palmer,
J. G., Peterson, M. J., and Baker, P. J.: Lack of cool, not warm, extremes
distinguishes late 20th Century climate in 979-year Tasmanian summer
temperature reconstruction, Environ. Res. Lett., 13, 034041,
https://doi.org/10.1088/1748-9326/aaafd7, 2018.
Alexander, M. R., Pearl, J. K., Bishop, D. A., Cook, E. R., Anchukaitis, K. J.,
and Pederson, N.: The potential to strengthen temperature reconstructions in
ecoregions with limited tree line using a multispecies approach, Quat. Res., 92, 583–597, https://doi.org/10.1017/qua.2019.33, 2019.
Altman, J.: Tree-ring-based disturbance reconstruction in interdisciplinary
research: Current state and future directions. Dendrochronologia, 125733,
https://doi.org/10.1016/j.dendro.2020.125733, 2020.
Arbellay, E., Jarvis, I., Chavardès, R. D., Daniels, L. D., and Stoffel,
M.: Tree-ring proxies of larch bud moth defoliation: latewood width and blue
intensity are more precise than tree-ring width, Tree Physiol., 38,
1237–1245, https://doi.org/10.1093/treephys/tpy057, 2018.
Babst, F., Poulter, B., Trouet, V., Tan, K., Neuwirth, B., Wilson, R.,
Carrer, M., Grabner, M., Tegel, W., Levanic, T., and Panayotov, M.: Site-and
species-specific responses of forest growth to climate across the European
continent, Global Ecol. Biogeogr., 22, 706–717, https://doi.org/10.1111/geb.12023, 2013.
Babst, F., Wright, W. E., Szejner, P., Wells, L., Belmecheri, S., and Monson,
R. K.: Blue intensity parameters derived from Ponderosa pine tree rings
characterize intra-annual density fluctuations and reveal seasonally
divergent water limitations, Trees, 30, 1403–1415, https://doi.org/10.1007/s00468-016-1377-6, 2016.
Björklund, J. A., Gunnarson, B. E., Seftigen, K., Esper, J., and Linderholm, H. W.: Blue intensity and density from northern Fennoscandian tree rings, exploring the potential to improve summer temperature reconstructions with earlywood information, Clim. Past, 10, 877–885, https://doi.org/10.5194/cp-10-877-2014, 2014a.
Björklund, J., Gunnarson, B.E., Seftigen, K., Zhang, P., and Linderholm,
H. W.: Using adjusted blue intensity data to attain high-quality summer
temperature information: a case study from Central Scandinavia, The Holocene,
25, 547–556, https://doi.org/10.1177/0959683614562434, 2014b.
Björklund, J., Seftigen, K., Schweingruber, F., Fonti, P., von Arx, G.,
Bryukhanova, M. V., Cuny, H. E., Carrer, M., Castagneri, D., and Frank, D. C.:
Cell size and wall dimensions drive distinct variability of earlywood and
latewood density in Northern Hemisphere conifers, New Phytologist, 216,
728–740, https://doi.org/10.1111/nph.14639, 2017.
Björklund, J., von Arx, G., Nievergelt, D., Wilson, R., Van den Bulcke, J., Günther, B., Loader, N. J., Rydval, M., Fonti, P., Scharnweber, T., Andreu-Hayles, L., Büntgen, U., D'Arrigo, R., Davi, N., De Mil, T., Esper, J., Gärtner, H., Geary, J., Gunnarson, B. E., Hartl, C., Hevia, A., Song, H., Janecka, K., Kaczka, R. J., Kirdyanov, A. V., Kochbeck, M., Liu, Y., Meko, M., Mundo, I., Nicolussi, K., Oelkers, R., Pichler, T., Sánchez-Salguero, R., Schneider, L., Schweingruber, F., Timonen, M., Trouet, V., Van Acker, J., Verstege, A., Villalba, R., Wilmking, M., and Frank, D.: Scientific Merits and Analytical Challenges of Tree-Ring Densitometry, Rev. Geophys., 57, 1224–1264, https://doi.org/10.1029/2019RG000642, 2019.
Björklund, J., Seftigen, K., Fonti, P., Nievergelt, D., von Arx, G.:
Dendroclimatic potential of dendroanatomy in temperature-sensitive Pinus
sylvestris, Dendrochronologia, 60, 125673, https://doi.org/10.1016/j.dendro.2020.125673, 2020.
Blake, S. A., Palmer, J. G., Björklund, J., Harper, J. B., and Turney, C. S.:
Palaeoclimate potential of New Zealand Manoao colensoi (silver pine) tree
rings using Blue-Intensity (BI), Dendrochronologia, 60, 125664, https://doi.org/10.1016/j.dendro.2020.125664, 2020.
Boswijk, G., Fowler, A. M., Palmer, J. G., Fenwick, P., Hogg, A., Lorrey, A.
and Wunder, J.: The late Holocene kauri chronology: assessing the potential
of a 4500-year record for palaeoclimate reconstruction, Quat. Sci. Rev., 90, 128–142, https://doi.org/10.1016/j.quascirev.2014.02.022, 2014.
Bradley, R. S.: Paleoclimatology: reconstructing climates of the Quaternary,
Elsevier, 595 pp., 1999.
Briffa, K. R., Osborn, T. J., Schweingruber, F. H., Jones, P. D., Shiyatov, S. G.,
and Vaganov, E. A.: Tree-ring width and density data around the Northern
Hemisphere: Part 1, local and regional climate signals, The Holocene, 12,
737–757, https://doi.org/10.1191/0959683602hl587rp, 2002.
Brookhouse, M. and Graham, R.: Application of the minimum blue-intensity
technique to a southern-hemisphere conifer, Tree-Ring Res., 72,
103–107, https://doi.org/10.3959/1536-1098-72.02.103, 2016.
Buckley, B. M., Cook, E. R., Peterson, M. J., and Barbetti, M.: A changing
temperature response with elevation for Lagarostrobos franklinii in
Tasmania, Australia, In Climatic Change at High Elevation Sites, Springer, Dordrecht. https://doi.org/10.1023/A:1005322332230, 245–266, 1997.
Buckley, B., Ogden, J., Palmer, J., Fowler, A., and Salinger, J.:
Dendroclimatic interpretation of tree-rings in Agathis australis (kauri), 1.
Climate correlation functions and master chronology. Journal of the Royal
Society of New Zealand, 30, 263–276, https://doi.org/10.1080/10412905.2002.9699839, 2000.
Buckley, B. M., Hansen, K. G., Griffin, K.L., Schmiege, S., Oelkers, R.,
D'Arrigo, R. D., Stahle, D. K., Davi, N., Nguyen, T. Q. T., Le, C. N., and Wilson,
R. J.: Blue intensity from a tropical conifer's annual rings for climate
reconstruction: An ecophysiological perspective, Dendrochronologia, 50,
10–22, https://doi.org/10.1016/j.dendro.2018.04.003, 2018.
Büntgen, U., Krusic, P. J., Verstege, A., Sangüesa-Barreda, G.,
Wagner, S., Camarero, J. J., Ljungqvist, F. C., Zorita, E., Oppenheimer, C.,
Konter, O., and Tegel, W.: New tree-ring evidence from the Pyrenees reveals
Western Mediterranean climate variability since medieval times, J. Climate, 30, 5295–5318, https://doi.org/10.1175/JCLI-D-16-0526.1, 2017.
Büntgen, U., Urban, O., Krusic, P.J., Rybníček, M.,
Kolář, T., Kyncl, T., Ač, A., Koňasová, E.,
Čáslavský, J., Esper, J., and Wagner, S.: Recent European drought
extremes beyond Common Era background variability, Nat. Geosci., 14,
190–196, https://doi.org/10.1038/s41561-021-00698-0, 2021.
Buras, A.: A comment on the expressed population signal, Dendrochronologia,
44, 130–132, https://doi.org/10.1016/j.dendro.2017.03.005, 2017
Buras, A., Spyt, B., Janecka, K., and Kaczka, R.: Divergent growth of Norway
spruce on Babia Góra Mountain in the western Carpathians,
Dendrochronologia, 50, 33–43, https://doi.org/10.1016/j.dendro.2018.04.005, 2018.
Camarero, J. J., Rozas, V., and Olano, J. M.: Minimum wood density of Juniperus
thurifera is a robust proxy of spring water availability in a continental
Mediterranean climate, J. Biogeogr., 41, 1105–1114, https://doi.org/10.1111/jbi.12271, 2014.
Camarero, J. J., Fernández-Pérez, L., Kirdyanov, A. V., Shestakova,
T. A., Knorre, A. A., Kukarskih, V. V., and Voltas, J.: Minimum wood density of
conifers portrays changes in early season precipitation at dry and cold
Eurasian regions, Trees, 31, 1423–1437, https://doi.org/10.1007/s00468-017-1559-x, 2017.
Campbell, R., McCarroll, D., Loader, N. J., Grudd, H., Robertson, I.,
Jalkanen, R.: Blue intensity in Pinus sylvestris tree-rings: developing a
new palaeoclimate proxy, The Holocene, 17, 821–828, https://doi.org/10.1177/0959683607080523, 2007.
Campbell, R., McCarroll, D., Robertson, I., Loader, N. J., Grudd, H.,
and Gunnarson, B.: Blue intensity in Pinus sylvestris tree rings: a manual for a
new palaeoclimate proxy, Tree-Ring Res., 67, 127–135, https://doi.org/10.3959/2010-13.1, 2011.
Cleaveland, M. K.: Climatic response of densitometric properties in semiarid
site tree rings, Tree-Ring Bull, 46, 13–29, 1986.
Cook, E. R. and Peters, K.: The smoothing spline: a new approach to
standardizing forest interior tree-ring width series for dendroclimatic
studies, 45–53, 1981.
Cook, E. R.: The Decomposition of Tree-Ring Series for Environmental
Studies, Tree-Ring Bull., 47, 37–59, 1987.
Cook, E. R., Briffa, K. R., and Jones, P. D.: Spatial regression methods in
dendroclimatology: a review and comparison of two techniques, Int. J. Climatol., 14, 379–402, doi.org/10.1002/joc.3370140404,
1994.
Cook, E. R., Palmer, J. G., Cook, B. I., Hogg, A., and D D'Arrigo, R.: A
multi-millennial palaeoclimatic resource from Lagarostrobos colensoi
tree-rings at Oroko Swamp, New Zealand, Glob. Planet. Change,
33, 209–220, https://doi.org/10.1016/S0921-8181(02)00078-4, 2002.
Cook, E. R., Buckley, B. M., Palmer, J. G., Fenwick, P., Peterson, M. J.,
Boswijk, G., and Fowler, A.: Millennia-long tree-ring records from Tasmania
and New Zealand: A basis for modelling climate variability and forcing,
past, present and future, J. Quat. Sci., 21, 689–699, https://doi.org/10.1002/jqs.1071,
2006.
Cook, E. R. and Pederson, N.: Uncertainty, emergence, and statistics in
dendrochronology, in: Dendroclimatology, Springer, Dordrecht, 77–112,
https://doi.org/10.1007/978-1-4020-5725-0_4, 2011.
D'Arrigo, R. D., Buckley, B. M., Cook, E. R., and Wagner, W. S.:
Temperature-sensitive tree-ring width chronologies of pink pine (Halocarpus
biformis) from Stewart Island, New Zealand. Palaeogeography,
Palaeoclimatology, Palaeoecology, 119, 293–300,
https://doi.org/10.1016/0031-0182(95)00014-3, 1996.
Davi, N. K., Rao, M. P., Wilson, R., Andreu-Hayles, L., Oelkers, R., D'Arrigo,
R., Nachin, B., Buckley, B., Pederson, N., Leland, C., and Suran, B.:
Accelerated Recent Warming and Temperature Variability over the Past Eight
Centuries in the Central Asian Altai from Blue Intensity in Tree Rings,
Geophys. Res. Lett., 49, doi.org/10.1029/2021GL092933, 2021.
Dolgova, E.: June–September temperature reconstruction in the Northern
Caucasus based on blue intensity data, Dendrochronologia, 39, 17–23, https://doi.org/10.1016/j.dendro.2016.03.002, 2016.
Drew, D. M., Allen, K., Downes, G. M., Evans, R., Battaglia, M., and Baker, P.:
Wood properties in a long-lived conifer reveal strong climate signals where
ring-width series do not, Tree Physiol., 33, 37–47, https://doi.org/10.1093/treephys/tps111, 2012.
Druckenbrod, D. L., Pederson, N., Rentch, J., and Cook, E.R.: A comparison of
times series approaches for dendroecological reconstructions of past canopy
disturbance events, Forest Ecol. Manage., 302, 23–33, https://doi.org/10.1016/j.foreco.2013.03.040, 2013.
Duncan, R. P., Fenwick, P., Palmer, J. G., McGlone, M. S., and Turney, C. S.:
Non-uniform interhemispheric temperature trends over the past 550
years, Clim. Dynam., 35, 1429–1438, https://doi.org/10.1007/s00382-010-0794-2, 2010.
Esper, J., Frank, D. C., Timonen, M., Zorita, E., Wilson, R. J., Luterbacher,
J., Holzkämper, S., Fischer, N., Wagner, S., Nievergelt, D., and
Verstege, A.: Orbital forcing of tree-ring data, Nat. Clim. Change,
2, 862–866, https://doi.org/10.1038/NCLIMATE1589, 2012.
Evans R.: Rapid measurement of the transverse dimensions of tracheids in
radial wood sections from Pinus radiata, Holzforschung, 48, 168–172,
https://doi.org/10.1515/hfsg.1994.48.2.168, 1994.
Fonti, P., Bryukhanova, M. V., Myglan, V. S., Kirdyanov, A. V., Naumova, O. V.,
and Vaganov, E. A.: Temperature-induced responses of xylem structure of Larix
sibirica (Pinaceae) from the Russian Altay, American Journal of Botany,
100, 1332–1343, https://doi.org/10.3732/ajb.1200484, 2013.
Fowler, A., Palmer, J., Salinger, J., and Ogden, J.: Dendroclimatic
interpretation of tree-rings in Agathis australis (kauri): 2. Evidence of a
significant relationship with ENSO, Journal of the Royal Society of New
Zealand, 30, 277–292, https://doi.org/10.1080/03014223.2000.9517622, 2000.
Fowler, A. M., Boswijk, G., Lorrey, A. M., Gergis, J., Pirie, M., McCloskey,
S. P., Palmer, J. G., and Wunder, J.: Multi-centennial tree-ring record of
ENSO-related activity in New Zealand, Nat. Clim. Change, 2,
172–176, https://doi.org/10.1038/nclimate1374, 2012.
Fritts, H. C., Smith, D. G., Cardis, J. W., and Budelsky, C. A.: Tree-ring
characteristics along a vegetation gradient in northern Arizona, Ecology,
46, 393–401, doi.org/10.2307/1934872, 1965.
Fritts, H. C.: Tree Rings and Climate, London, Academic Press Ltd, 553 pp., 1976.
Fuentes, M., Salo, R., Björklund, J., Seftigen, K., Zhang, P.,
Gunnarson, B., Aravena, J. C., and Linderholm, H. W.: A 970-year-long summer
temperature reconstruction from Rogen, west-central Sweden, based on blue
intensity from tree rings, The Holocene, 28, 254–266, https://doi.org/10.1177/0959683617721322, 2017.
Harley, G. L., Heeter, K. J., Maxwell, J. T., Rayback, S. A., Maxwell, R. S.,
Reinemann, T. E., and Taylor, A.: Towards broad-scale temperature
reconstructions for Eastern North America using blue light intensity from
tree rings, Int. J. Clim., 41, 3142–3159, https://doi.org/10.1002/joc.6910, 2021.
Harris, I. P. D. J., Jones, P. D., Osborn, T. J., and Lister, D.H.: Updated
high-resolution grids of monthly climatic observations–the CRU TS3. 10,
Dataset, Int. J. Climatol., 34, 623–642, https://doi.org/10.1002/joc.3711, 2014.
Heeter, K. J., Harley, G. L., Maxwell, J. T., McGee, J. H., and Matheus, T. J.:
Late summer temperature variability for the Southern Rocky Mountains (USA)
since 1735 CE: applying blue light intensity to low-latitude Picea
engelmannii Parry ex Engelm, Clim. Change, 162, 965–988, https://doi.org/10.1007/s10584-020-02772-9, 2020.
Helama, S., Arentoft, B. W., Collin-Haubensak, O., Hyslop, M. D., Brandstrup,
C. K., Mäkelä, H. M., Tian, Q., and Wilson, R.: Dendroclimatic signals
deduced from riparian versus upland forest interior pines in North Karelia,
Finland, Ecol. Res., 28, 1019–1028, https://doi.org/10.1007/s11284-013-1084-3, 2013.
Kaczka, R. J., Spyt, B., Janecka, K., Beil, I., Büntgen, U., Scharnweber,
T., Nievergelt, D., and Wilmking, M.: Different maximum latewood density and
blue intensity measurements techniques reveal similar results,
Dendrochronologia, 49, 94–101, https://doi.org/10.1016/j.dendro.2018.03.005, 2018.
Kaczka, R. J. and Wilson, R.: I-BIND: International Blue Intensity Network
Development Working Group, Dendrochronologia, 68, 125859, https://doi.org/10.1016/j.dendro.2021.125859, 2021.
Ljungqvist, F. C., Thejll, P., Björklund, J., Gunnarson, B. E.,
Piermattei, A., Rydval, M., Seftigen, K., Støve, B., and Büntgen, U.:
Assessing non-linearity in European temperature-sensitive tree-ring data,
Dendrochronologia, 59, 125652, https://doi.org/10.1016/j.dendro.2019.125652, 2019.
Loader, N. J., Santillo, P. M., Woodman-Ralph, J. P., Rolfe, J. E., Hall, M. A.,
Gagen, M., Robertson, I., Wilson, R., Froyd, C. A., and McCarroll, D.:
Multiple stable isotopes from oak trees in southwestern Scotland and the
potential for stable isotope dendroclimatology in maritime climatic regions,
Chem. Geol., 252, 62–71, https://doi.org/10.1016/j.chemgeo.2008.01.006,
2008.
Loader, N. J., Young, G. H., McCarroll, D., Davies, D., Miles, D., and Bronk
Ramsey, C.: Summer precipitation for the England and Wales region,
1201–2000 CE, from stable oxygen isotopes in oak tree rings, J. Quat. Sci., 35, 731–736, https://doi.org/10.1002/jqs.3226, 2020.
Lorimer, C. G. and Frelich, L. E.: A methodology for estimating canopy
disturbance frequency and intensity in dense temperate forests, Canadian
Journal of Forest Research, 19, 651–663, https://doi.org/10.1139/x89-102, 1989.
McCarroll, D., Pettigrew, E., Luckman, A., Guibal, F., and Edouard, J. L.:
Blue reflectance provides a surrogate for latewood density of high-latitude
pine tree rings, Arctic, Antarctic, and Alpine Research, 34, 450–453,
https://doi.org/10.2307/1552203, 2002.
McCarroll, D. and Loader, N. J.: Stable isotopes in tree rings, Quat. Sci. Rev., 23, 771–801, https://doi.org/10.1016/j.quascirev.2003.06.017,
2004.
Neukom, R., Gergis, J., Karoly, D. J., Wanner, H., Curran, M., Elbert, J.,
González-Rouco, F., Linsley, B. K., Moy, A. D., Mundo, I., and Raible,
C. C.: Inter-hemispheric temperature variability over the past millennium,
Nat. Clim. Change, 4, 362–367, https://doi.org/10.1038/nclimate2174, 2014.
O'Donnell, A. J., Allen, K. J., Evans, R. M., Cook, E. R., Trouet, V., and Baker,
P. J.: Wood density provides new opportunities for reconstructing past
temperature variability from southeastern Australian trees, Global Planet. Change, 141, 1–11, https://doi.org/10.1016/j.gloplacha.2016.03.010, 2016.
Palmer, J. G. and Xiong, L.: New Zealand climate over the last 500 years
reconstructed from Libocedrus bidwillii Hook. f. tree-ring chronologies, The
Holocene, 14, 282–289, https://doi.org/10.1191/0959683604hl679rr, 2004.
Panyushkina, I. P., Hughes, M. K., Vaganov, E. A., and Munro, M. A.: Summer
temperature in northeastern Siberia since 1642 reconstructed from tracheid
dimensions and cell numbers of Larix cajanderi, Canadian Journal of Forest
Research, 33, 1905–1914, https://doi.org/10.1139/x03-109, 2003.
Prendin, A. L., Petit, G., Carrer, M., Fonti, P., Björklund, J., and von
Arx, G.: New research perspectives from a novel approach to quantify
tracheid wall thickness, Tree Physiol., 37, 976–983, https://doi.org/10.1093/treephys/tpx037, 2017.
Reid, E. and Wilson, R.: Delta Blue Intensity vs. Maximum Density: A Case
Study using Pinus uncinata in the Pyrenees, Dendrochronologia, 61, 125706, https://doi.org/10.1016/j.dendro.2020.125706, 2020.
Rohde, R., Muller, R. A., Jacobsen, R., Muller, E., Perlmutter, S.,
Rosenfeld, A., Wurtele J., Groom D., and Wickham C.: A new estimate of the
average earth surface land temperature spanning 1753 to 2011, Geoinformatics and Geostatistics, 1:1, available at: https://static.berkeleyearth.org/papers/Results-Paper-Berkeley-Earth.pdf,
2013.
Rydval, M., Larsson, L. Å., McGlynn, L., Gunnarson, B. E., Loader, N. J.,
Young, G. H., and Wilson, R.: Blue intensity for dendroclimatology: should we
have the blues? Experiments from Scotland, Dendrochronologia, 32, 191–204,
https://doi.org/10.1016/j.dendro.2014.04.003, 2014.
Rydval, M., Druckenbrod, D., Anchukaitis, K. J., and Wilson, R.: Detection and
removal of disturbance trends in tree-ring series for dendroclimatology,
Canadian Journal of Forest Research, 46, 387–401, https://doi.org/10.1139/cjfr-2015-0366, 2015.
Rydval, M., Loader, N.J., Gunnarson, B. E., Druckenbrod, D. L., Linderholm,
H. W., Moreton, S. G., Wood, C. V., and Wilson, R.: Reconstructing 800 years of
summer temperatures in Scotland from tree rings, Clim. Dynam., 49,
2951–2974, https://doi.org/10.1007/s00382-016-3478-8, 2017.
Rydval, M., Druckenbrod, D. L., Svoboda, M., Trotsiuk, V., Janda, P.,
Mikoláš, M., Čada, V., Bače, R., Teodosiu, M., and Wilson, R.:
Influence of sampling and disturbance history on climatic sensitivity of
temperature-limited conifers, The Holocene, 28, 1574–1587, https://doi.org/10.1177/0959683618782605, 2018.
Seftigen, K., Fuentes, M., Ljungqvist, F. C., and Björklund, J.: Using
Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to
improve reconstruction of past hydroclimate variability, Clim. Dynam.,
1–16, https://doi.org/10.1007/s00382-020-05287-2, 2020.
St. George, S.: An overview of tree-ring width records across the Northern
Hemisphere, Quat. Sci. Rev., 95, 132–150, https://doi.org/10.1016/j.quascirev.2014.04.029, 2014.
Trotsiuk, V., Pederson, N., Druckenbrod, D. L., Orwig, D. A., Bishop, D. A.,
Barker-Plotkin, A., Fraver, S., and Martin-Benito, D.: Testing the efficacy
of tree-ring methods for detecting past disturbances, Forest Ecol.
Manage., 425, 59–67, https://doi.org/10.1016/j.foreco.2018.05.045, 2018.
Visser, H. and Molenaar, J.: Kalman filter analysis in dendroclimatology,
Biometrics, 44, 929–940, https://doi.org/10.2307/2531724, 1988.
von Arx, G., Crivellaro, A., Prendin, A. L., Čufar, K., and Carrer, M.:
Quantitative wood anatomy – practical guidelines, Front. Plant
Sci., 7, 781, https://doi.org/10.3389/fpls.2016.00781, 2016.
Wang, L., Payette, S., and Bégin, Y.: Relationships between anatomical
and densitometric characteristics of black spruce and summer temperature at
tree line in northern Quebec, Canadian Journal of Forest Research, 32,
477–486, https://doi.org/10.1139/x01-208, 2002.
Wigley, T. M., Briffa, K. R., and Jones, P. D.: On the average value of
correlated time series, with applications in dendroclimatology and
hydrometeorology, J. Appl. Meteorol. Clim., 23,
201–213, https://doi.org/10.1175/1520-0450(1984)023<0201:OTAVOC>2.0.CO;2, 1984.
Wiles, G. C., Charlton, J., Wilson, R. J., D'Arrigo, R. D., Buma, B., Krapek,
J., Gaglioti, B. V., Wiesenberg, N., and Oelkers, R.: Yellow-cedar blue intensity
tree-ring chronologies as records of climate in Juneau, Alaska, USA,
Canadian Journal of Forest Research, 49, 1483–1492, https://doi.org/10.1139/cjfr-2018-0525, 2019.
Wilmking, M., van der Maaten-Theunissen, M., van der Maaten, E.,
Scharnweber, T., Buras, A., Biermann, C., Gurskaya, M., Hallinger, M.,
Lange, J., Shetti, R., and Smiljanic, M.: Global assessment of relationships
between climate and tree growth, Glob. Change Biol., 26, 3212–3220,
https://doi.org/10.1111/gcb.15057, 2020.
Wilson, R. J. and Hopfmueller, M.: Dendrochronological investigations of
Norway spruce along an elevational transect in the Bavarian Forest, Germany,
Dendrochronologia, 19, 67–79, 2001.
Wilson, R. J. and Luckman, B. H.: Dendroclimatic reconstruction of maximum
summer temperatures from upper treeline sites in Interior British Columbia,
Canada, The Holocene, 13, 851–861, https://doi.org/10.1191/0959683603hl663rp,
2003.
Wilson, R. and Elling, W.: Temporal instability in tree-growth/climate
response in the Lower Bavarian Forest region: implications for
dendroclimatic reconstruction, Trees, 18, 19–28, https://doi.org/10.1007/s00468-003-0273-z, 2004.
Wilson, R. J. S, Rao, R., Rydval, M., Wood, C., Larsson, L.-A., and Luckman, B. H.:
Blue Intensity for Dendroclimatology: The BC Blues: A Case Study from
British Columbia Canada, The Holocene, 24, 1428–1438, https://doi.org/10.1177/0959683614544051, 2014.
Wilson, R., Anchukaitis, K., Briffa, K., Büntgen, U., Cook, E., D’Arrigo, R., Davi, N., Esper, J., Frank, D., Gunnarson, B., Hegerl, G., Helema, S., Klesse, S., Krusic, P., Linderholm, H.W., Myglan, V., Osborn, T., Rydval, M., Schneider, L., Schurer, A., Wiles, G., Zhang, P., and Zorita, E.: Last millennium Northern Hemisphere summer temperatures from tree rings: Part I: the long term context, Quat. Sci. Rev., 134, 1–18, https://doi.org/10.1016/j.quascirev.2015.12.005, 2016.
Wilson, R., Wilson, D., Rydval, M., Crone, A., Büntgen, U., Clark, S.,
Ehmer, J., Forbes, E., Fuentes, M., Gunnarson, B. E., Linderholm, H.,
Nicolussi, K., Wood, C., and Mills, C.: Facilitating tree-ring dating of
historic conifer timbers using Blue Intensity, J. Archaeol. Sci., 78, 99–111, https://doi.org/10.1016/j.jas.2016.11.011, 2017a.
Wilson, R., D'Arrigo, R., Andreu-Hayles, L., Oelkers, R., Wiles, G., Anchukaitis, K., and Davi, N.: Experiments based on blue intensity for reconstructing North Pacific temperatures along the Gulf of Alaska, Clim. Past, 13, 1007–1022, https://doi.org/10.5194/cp-13-1007-2017, 2017b.
Wilson, R., Anchukaitis, K., Andreu-Hayles, L., Cook, E., D'Arrigo, R.,
Davi, N., Haberbauer, L., Krusic, P., Luckman, B., Morimoto, D., and Oelkers,
R.: Improved dendroclimatic calibration using blue intensity in the
southern Yukon, The Holocene, 29, 1817–1830, https://doi.org/10.1177/0959683619862037, 2019.
Xiong, L., Okada, N., Fujiwara, T., Ohta, S., and Palmer, J. G.: Chronology
development and climate response analysis of different New Zealand pink pine
(Halocarpus biformis) tree-ring parameters, Canadian Journal of Forest
Research, 28, 566–573, https://doi.org/10.1139/cjfr-28-4-566, 1998.
Yasue, K., Funada, R., Kobayashi, O., and Ohtani, J.: The effects of tracheid
dimensions on variations in maximum density of Picea glehnii and
relationships to climatic factors, Trees, 14, 223–229, https://doi.org/10.1007/PL00009766, 2000.
Young, G. H., Loader, N. J., McCarroll, D., Bale, R. J., Demmler, J. C., Miles,
D., Nayling, N. T., Rinne, K. T., Robertson, I., Watts, C., and Whitney, M.:
Oxygen stable isotope ratios from British oak tree-rings provide a strong
and consistent record of past changes in summer rainfall, Clim. Dynam.,
45, 3609–3622, https://doi.org/10.1007/s00382-015-2559-4, 2015.
Short summary
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.
We explore blue intensity (BI) – a low-cost method for measuring ring density – to enhance...
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