Articles | Volume 19, issue 5
https://doi.org/10.5194/bg-19-1587-2022
© 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-19-1587-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
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18 Mar 2022
Research article | Highlight paper |
| 18 Mar 2022
| 18 Mar 2022
Performance of temperature and productivity proxies based on long-chain alkane-1, mid-chain diols at test: a 5-year sediment trap record from the Mauritanian upwelling
Gerard J. M. Versteegh
CORRESPONDING AUTHOR
Alfred Wegener Institute for Polar and Marine Research, Am
Handelshafen 12, 27570 Bremerhaven, Germany
Department of Physics and Earth Sciences, Jacobs University, Bremen,
28759 Bremen, Germany
MARUM – Zentrum für Marine Umweltwissenschaften, Universität
Bremen, 28359 Bremen, Germany
Karin A. F. Zonneveld
MARUM – Zentrum für Marine Umweltwissenschaften, Universität
Bremen, 28359 Bremen, Germany
Fachbereich Geowissenschaften, Universität Bremen, 28359 Bremen,
Germany
Jens Hefter
Alfred Wegener Institute for Polar and Marine Research, Am
Handelshafen 12, 27570 Bremerhaven, Germany
MARUM – Zentrum für Marine Umweltwissenschaften, Universität
Bremen, 28359 Bremen, Germany
Oscar E. Romero
Alfred Wegener Institute for Polar and Marine Research, Am
Handelshafen 12, 27570 Bremerhaven, Germany
MARUM – Zentrum für Marine Umweltwissenschaften, Universität
Bremen, 28359 Bremen, Germany
Gerhard Fischer
Fachbereich Geowissenschaften, Universität Bremen, 28359 Bremen,
Germany
Gesine Mollenhauer
Alfred Wegener Institute for Polar and Marine Research, Am
Handelshafen 12, 27570 Bremerhaven, Germany
MARUM – Zentrum für Marine Umweltwissenschaften, Universität
Bremen, 28359 Bremen, Germany
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Polarforschung, 94, 69–95, https://doi.org/10.5194/polf-94-69-2026, https://doi.org/10.5194/polf-94-69-2026, 2026
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This paper reviews how the Alfred Wegener Institute studies changes in the ocean and the polar ice regions under climate warming. We bring together results from field observations, laboratory work, and computer models to show how melting ice and changing seas affect global climate and sea level. By combining many approaches, we identify key advances, remaining gaps, and future priorities. Integrating these methods improves our ability to project future climate change and guide decision-making.
Tsai-Wen Lin, Florian Adolphi, Hendrik Grotheer, Jens Hefter, Tommaso Tesi, Johannes Lachner, Stella Winkler, Junjie Wu, Eduardo Queiroz Alves, and Gesine Mollenhauer
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This preprint is open for discussion and under review for Climate of the Past (CP).
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Janina Güntzel, Juliane Müller, Ralf Tiedemann, Gesine Mollenhauer, Lester Lembke-Jene, Estella Weigelt, Lasse Schopen, Niklas Wesch, Laura Kattein, Andrew N. Mackintosh, and Johann P. Klages
The Cryosphere, 20, 3739–3758, https://doi.org/10.5194/tc-20-3739-2026, https://doi.org/10.5194/tc-20-3739-2026, 2026
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Combined multi-proxy sediment core analyses and bathymetry data reveal the deglaciation along the Mac. Robertson Shelf, a yet insufficiently studied sector of the East Antarctic margin. Grounding line extent towards the continental shelf break prior to ~12.7 cal. ka BP and subsequent episodic mid-shelf retreat until the early Holocene prevented Dense Shelf Water formation in its current form, hence suggesting a different formation mechanism under such full glacial conditions.
Surya Eldo V. Roza, Runa T. Reuter, Jan-Berend W. Stuut, Gerard J. M. Versteegh, Vera Pospelova, Iria García-Moreiras, and Karin A. F. Zonneveld
Biogeosciences, 23, 831–850, https://doi.org/10.5194/bg-23-831-2026, https://doi.org/10.5194/bg-23-831-2026, 2026
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Arnaud Nicolas, Jens Hefter, Hendrik Grotheer, Tommaso Tesi, Ruediger Stein, Alessio Nogarotto, Eduardo Queiroz Alves, and Gesine Mollenhauer
Clim. Past, 21, 2579–2599, https://doi.org/10.5194/cp-21-2579-2025, https://doi.org/10.5194/cp-21-2579-2025, 2025
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We analyzed a high-resolution marine sediment record from the Laptev Sea to reconstruct deglacial permafrost thaw events during the last 16 kyr. Using biomarkers and radiocarbon dating, we found that peaks in pre-aged terrigenous material coincided with rapid sea-level rise, indicating coastal erosion as the main mobilization mechanism. This research provides insights into past permafrost carbon release, informing predictions of future climate-permafrost feedback in a warming world.
Tsai-Wen Lin, Tommaso Tesi, Jens Hefter, Hendrik Grotheer, Jutta Wollenburg, Florian Adolphi, Henning A. Bauch, Alessio Nogarotto, Juliane Müller, and Gesine Mollenhauer
Clim. Past, 21, 753–772, https://doi.org/10.5194/cp-21-753-2025, https://doi.org/10.5194/cp-21-753-2025, 2025
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In order to understand the mechanisms governing permafrost organic matter remobilization, we investigated organic matter composition during past intervals of rapid sea-level rise, of inland warming, and of dense sea-ice cover in the Laptev Sea. We find that sea-level rise resulted in widespread erosion and transport of permafrost materials to the ocean but that erosion is mitigated by regional dense sea-ice cover. Factors like inland warming or floods increase permafrost mobilization locally.
Wee Wei Khoo, Juliane Müller, Oliver Esper, Wenshen Xiao, Christian Stepanek, Paul Gierz, Gerrit Lohmann, Walter Geibert, Jens Hefter, and Gesine Mollenhauer
Clim. Past, 21, 299–326, https://doi.org/10.5194/cp-21-299-2025, https://doi.org/10.5194/cp-21-299-2025, 2025
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Using a multiproxy approach, we analyzed biomarkers and diatom assemblages from a marine sediment core from the Powell Basin, Weddell Sea. The results reveal the first continuous coastal Antarctic sea ice record since the Last Penultimate Glacial. Our findings contribute valuable insights into past glacial–interglacial sea ice responses to a changing climate and enhance our understanding of ocean–sea ice–ice shelf interactions and dynamics.
Bennet Juhls, Anne Morgenstern, Jens Hölemann, Antje Eulenburg, Birgit Heim, Frederieke Miesner, Hendrik Grotheer, Gesine Mollenhauer, Hanno Meyer, Ephraim Erkens, Felica Yara Gehde, Sofia Antonova, Sergey Chalov, Maria Tereshina, Oxana Erina, Evgeniya Fingert, Ekaterina Abramova, Tina Sanders, Liudmila Lebedeva, Nikolai Torgovkin, Georgii Maksimov, Vasily Povazhnyi, Rafael Gonçalves-Araujo, Urban Wünsch, Antonina Chetverova, Sophie Opfergelt, and Pier Paul Overduin
Earth Syst. Sci. Data, 17, 1–28, https://doi.org/10.5194/essd-17-1-2025, https://doi.org/10.5194/essd-17-1-2025, 2025
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Arnaud Nicolas, Gesine Mollenhauer, Johannes Lachner, Konstanze Stübner, Maylin Malter, Jutta Wollenburg, Hendrik Grotheer, and Florian Adolphi
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We use the authigenic 10Be/9Be record of a Laptev Sea sediment core for the period 8–14 kyr BP and synchronize it with the 10Be records from absolutely dated ice cores. We employed a likelihood function to calculate the ΔR values. A benthic ΔR value of +345±60 14C years was estimated, which corresponds to a marine reservoir age of 848±90 14C years. This new ΔR value was used to refine the age–depth model for core PS2458-4, establishing it as a potential reference chronology for the Laptev Sea.
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Clim. Past, 20, 523–546, https://doi.org/10.5194/cp-20-523-2024, https://doi.org/10.5194/cp-20-523-2024, 2024
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The climatic factors sustaining vegetation in the Sahara during the African humid period (AHP) are still not fully understood. Using biomarkers in a marine sediment core from the eastern Mediterranean, we infer variations in Mediterranean (winter) and monsoonal (summer) rainfall in the Nile river watershed around the AHP. We find that winter and summer rain enhanced during the AHP, suggesting that Mediterranean moisture supported the monsoon in sustaining the “green Sahara”.
Eduardo Queiroz Alves, Wanyee Wong, Jens Hefter, Hendrik Grotheer, Tommaso Tesi, Torben Gentz, Karin Zonneveld, and Gesine Mollenhauer
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Julia Rieke Hagemann, Lester Lembke-Jene, Frank Lamy, Maria-Elena Vorrath, Jérôme Kaiser, Juliane Müller, Helge W. Arz, Jens Hefter, Andrea Jaeschke, Nicoletta Ruggieri, and Ralf Tiedemann
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Maria-Elena Vorrath, Juliane Müller, Paola Cárdenas, Thomas Opel, Sebastian Mieruch, Oliver Esper, Lester Lembke-Jene, Johan Etourneau, Andrea Vieth-Hillebrand, Niko Lahajnar, Carina B. Lange, Amy Leventer, Dimitris Evangelinos, Carlota Escutia, and Gesine Mollenhauer
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Sea ice is important to stabilize the ice sheet in Antarctica. To understand how the global climate and sea ice were related in the past we looked at ancient molecules (IPSO25) from sea-ice algae and other species whose dead cells accumulated on the ocean floor over time. With chemical analyses we could reconstruct the history of sea ice and ocean temperatures of the past 14 000 years. We found out that sea ice became less as the ocean warmed, and more phytoplankton grew towards today's level.
Lidia A. Kuhn, Karin A. F. Zonneveld, Paulo A. Souza, and Rodrigo R. Cancelli
Biogeosciences, 20, 1843–1861, https://doi.org/10.5194/bg-20-1843-2023, https://doi.org/10.5194/bg-20-1843-2023, 2023
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This study investigated changes in coastal ecosystems that reflect environmental changes over the past 6500 years on Brazil's largest oceanic island. This study was motivated by the need to understand the natural evolution of coastal areas to predict future changes. The results highlight the sensitivity of this ecosystem to changes caused by relative sea level variations. As such, it contributes to the debate about potential effects of current climate change induced by global sea level changes.
Olga Ogneva, Gesine Mollenhauer, Bennet Juhls, Tina Sanders, Juri Palmtag, Matthias Fuchs, Hendrik Grotheer, Paul J. Mann, and Jens Strauss
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Mengli Cao, Jens Hefter, Ralf Tiedemann, Lester Lembke-Jene, Vera D. Meyer, and Gesine Mollenhauer
Clim. Past, 19, 159–178, https://doi.org/10.5194/cp-19-159-2023, https://doi.org/10.5194/cp-19-159-2023, 2023
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We use sediment records of lignin to reconstruct deglacial vegetation change and permafrost mobilization, which occurred earlier in the Yukon than in the Amur river basin. Sea ice extent or surface temperatures of adjacent oceans might have had a strong influence on the timing of permafrost mobilization. In contrast to previous evidence, our records imply that during glacial peaks of permafrost decomposition, lipids and lignin might have been delivered to the ocean by identical processes.
Stefan Mulitza, Torsten Bickert, Helen C. Bostock, Cristiano M. Chiessi, Barbara Donner, Aline Govin, Naomi Harada, Enqing Huang, Heather Johnstone, Henning Kuhnert, Michael Langner, Frank Lamy, Lester Lembke-Jene, Lorraine Lisiecki, Jean Lynch-Stieglitz, Lars Max, Mahyar Mohtadi, Gesine Mollenhauer, Juan Muglia, Dirk Nürnberg, André Paul, Carsten Rühlemann, Janne Repschläger, Rajeev Saraswat, Andreas Schmittner, Elisabeth L. Sikes, Robert F. Spielhagen, and Ralf Tiedemann
Earth Syst. Sci. Data, 14, 2553–2611, https://doi.org/10.5194/essd-14-2553-2022, https://doi.org/10.5194/essd-14-2553-2022, 2022
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Stable isotope ratios of foraminiferal shells from deep-sea sediments preserve key information on the variability of ocean circulation and ice volume. We present the first global atlas of harmonized raw downcore oxygen and carbon isotope ratios of various planktonic and benthic foraminiferal species. The atlas is a foundation for the analyses of the history of Earth system components, for finding future coring sites, and for teaching marine stratigraphy and paleoceanography.
Charlotte Haugk, Loeka L. Jongejans, Kai Mangelsdorf, Matthias Fuchs, Olga Ogneva, Juri Palmtag, Gesine Mollenhauer, Paul J. Mann, P. Paul Overduin, Guido Grosse, Tina Sanders, Robyn E. Tuerena, Lutz Schirrmeister, Sebastian Wetterich, Alexander Kizyakov, Cornelia Karger, and Jens Strauss
Biogeosciences, 19, 2079–2094, https://doi.org/10.5194/bg-19-2079-2022, https://doi.org/10.5194/bg-19-2079-2022, 2022
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Buried animal and plant remains (carbon) from the last ice age were freeze-locked in permafrost. At an extremely fast eroding permafrost cliff in the Lena Delta (Siberia), we found this formerly frozen carbon well preserved. Our results show that ongoing degradation releases substantial amounts of this carbon, making it available for future carbon emissions. This mobilisation at the studied cliff and also similarly eroding sites bear the potential to affect rivers and oceans negatively.
Gerhard Fischer, Oscar E. Romero, Johannes Karstensen, Karl-Heinz Baumann, Nasrollah Moradi, Morten Iversen, Götz Ruhland, Marco Klann, and Arne Körtzinger
Biogeosciences, 18, 6479–6500, https://doi.org/10.5194/bg-18-6479-2021, https://doi.org/10.5194/bg-18-6479-2021, 2021
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Low-oxygen eddies in the eastern subtropical North Atlantic can form an oasis for phytoplankton growth. Here we report on particle flux dynamics at the oligotrophic Cape Verde Ocean Observatory. We observed consistent flux patterns during the passages of low-oxygen eddies. We found distinct flux peaks in late winter, clearly exceeding background fluxes. Our findings suggest that the low-oxygen eddies sequester higher organic carbon than expected for oligotrophic settings.
Cited articles
Brassell, S. C., Eglinton, G., Marlowe, I. T., Pflaumann, U., and Sarnthein,
M.: Molecular stratigraphy: a new tool for climatic assessment, Nature, 320,
129–133, https://doi.org/10.1038/320129a0, 1986.
Chavez, F. P. and Messié, M.: A comparison of eastern boundary upwelling
ecosystems, Prog. Oceanogr., 83, 80–96,
https://doi.org/10.1016/j.pocean.2009.07.032, 2009.
Conte, M. H., Sicre, M. A., Rühlemann, C., Weber, J. C., Schulte, S.,
Schulz-Bull, D., and Blanz, T.: Global temperature calibration of the
alkenone unsaturation index (
Cropper, T. E., Hanna, E., and Bigg, G. R.: Spatial and temporal seasonal
trends in coastal upwelling off Northwest Africa, 1981–2012, Deep-Sea Res. Pt. I, 86, 94–111, https://doi.org/10.1016/j.dsr.2014.01.007, 2014.
de Bar, M. W., Ullgren, J. E., Thunnell, R. C., Wakeham, S. G., Brummer, G.-J. A., Stuut, J.-B. W., Sinninghe Damsté, J. S., and Schouten, S.: Long-chain diols in settling particles in tropical oceans: insights into sources, seasonality and proxies, Biogeosciences, 16, 1705–1727, https://doi.org/10.5194/bg-16-1705-2019, 2019.
de Bar, M. W., Weiss, G., Yildiz, C., Rampen, S. W., Lattaud, J., Bale, N.
J., Mienis, F., Brummer, G.-J. A., Schulz, H., Ruch, D., Kim, J.-H., Donner,
B., Knies, J., Lückge, A., Stuut, J.-B. W., Sinninghe Damsté, J. S.,
and Schouten, S.: Global temperature calibration of the Long chain Diol
Index in marine surface sediments, Org. Geochem., 142, 103983,
https://doi.org/10.1016/j.orggeochem.2020.103983, 2020.
de Leeuw, J. W., Rijpstra, W. I. C., and Schenck, P. A.: The occurrence and
identification of C30, C31 and C32 alkan-1,15-diols and
alkan-15-on-1-ols in Unit I and Unit II Black Sea sediments, Geochim. Cosmochim. Ac., 45, 2281–2285,
https://doi.org/10.1016/0016-7037(81)90077-6, 1981.
Elling, F. J., Könneke, M., Mußmann, M., Greve, A., and Hinrichs,
K.-U.: Influence of temperature, pH, and salinity on membrane lipid
composition and TEX86 of marine planktonic thaumarchaeal isolates,
Geochim. Cosmochim. Ac., 171, 238–255,
https://doi.org/10.1016/j.gca.2015.09.004, 2015.
Fischer, G. and Karakaş, G.: Sinking rates and ballast composition of particles in the Atlantic Ocean: implications for the organic carbon fluxes to the deep ocean, Biogeosciences, 6, 85–102, https://doi.org/10.5194/bg-6-85-2009, 2009.
Gabric, A. J., Garcia, L., Camp, L. V., Nykjaer, L., Eifler, W., and
Schrimpf, W.: Offshore export of shelf production in the Cape Blanc
(Mauritania) giant filament as derived from coastal zone color scanner
imagery, J. Geophys. Res., 98, 4697–4712,
https://doi.org/10.1029/92JC01714, 1993.
Gal, J.-K., Kim, J.-H., and Shin, K.-H.: Distribution of long chain alkyl
diols along a south-north transect of the northwestern Pacific region:
Insights into a paleo sea surface nutrient proxy, Org. Geochem., 119,
80–90, https://doi.org/10.1016/j.orggeochem.2018.01.010, 2018.
Gal, J.-K., Kim, J.-H., Kim, S., Lee, S. H., Yoo, K.-C., and Shin, K.-H.:
Application of the newly developed nutrient diol index (NDI) as a sea
surface nutrient proxy in the East Sea for the last 240 years, Quat.
Intern., 503, 146–152, https://doi.org/10.1016/j.quaint.2018.11.003, 2019.
Gal, J.-K., Kim, J.-H., Kim, S., Hwang, J., and Shin, K.-H.: Assessment of
the nutrient diol index (NDI) as a sea surface nutrient proxy using sinking
particles in the East Sea, Mar. Chem., 231, 103937,
https://doi.org/10.1016/j.marchem.2021.103937, 2021.
Garcia, H. E., Weathers, K., Paver, C. R., Smolyar, I., Boyer, T. P.,
Locarnini, M. M., Zweng, M. M., Mishonov, A. V., Baranova, O. K., Seidov,
D., and Reagan, J. R.: World Ocean Atlas 2018, Vol. 4: Dissolved Inorganic
Nutrients (phosphate, nitrate and nitrate + nitrite, silicate), Mishonov, A., Technical Editor, Silver Spring MD, NOAA Atlas NESDIS 84 [data set], p. 35, https://www.ncei.noaa.gov/access/world-ocean-atlas-2018/bin/woa18.pl?parameter=p (last access: 10 March 2022), https://www.ncei.noaa.gov/access/world-ocean-atlas-2018/bin/woa18.pl?parameter=n (last access: 10 March 2022), 2019.
Gelin, F., Boogers, I., Noordeloos, A. A. M., Sinninghe Damsté, J. S., Riegman, R., and de Leeuw, J. W.: Resistant biomacromolecules in marine microalgae of the classes Eustigmatophyceae and Chlorophyceae: Geochemical applications, Org. Geochem., 26, 659–675, https://doi.org/10.1016/S0146-6380(97)00035-1, 1997.
Grange, S. K.: Technical note: Averaging wind speeds and directions,
https://doi.org/10.13140/RG.2.1.3349.2006, 2014.
Hammer, Ø., Harper, D. A. T., and Ryan, P. D.: PAST: Paleontological
statistics software package for education and data analysis, Palaeontol.
Electron., 4, 1–9, 2001.
Huang, B., Liu, C., Banzon, V. F., Freeman, E., Graham, G., Hankins, B.,
Smith, T., and Zhang, H.-M.: NOAA 0.25-degree daily optimum interpolation sea
surface temperature (OISST), Version 2.1, Dataset
ncdcOisst21Agg_LonPM180, NOAA National Centers for
Environmental Information [data set], https://doi.org/10.25921/RE9P-PT57, 2020.
Kim, M., Hwang, J., Rho, T., Lee, T., Kang, D.-J., Chang, K.-I., Noh, S.,
Joo, H., Kwak, J. H., Kang, C.-K., and Kim, K.-R.: Biogeochemical properties
of sinking particles in the southwestern part of the East Sea (Japan Sea),
J. Marine Syst., 167, 33–42, https://doi.org/10.1016/j.jmarsys.2016.11.001,
2017.
Kremling, K., Lentz, U., Zeitzschel, B., Schulz-Bull, D. E., and Duinker, J.
C.: New type of time-series sediment trap for the reliable collection of
inorganic and organic trace chemical substances, Rev. Sci. Instrum., 67,
4360, https://doi.org/10.1063/1.1147582, 1998.
Lathuilière, C., Echevin, V., and Lévy, M.: Seasonal and
intraseasonal surface chlorophyll-a variability along the northwest African
coast, J. Geophys. Res., 113, C05007, https://doi.org/10.1029/2007JC004433,
2008.
Lattaud, J., Dorhout, D., Schulz, H., Castañeda, I. S., Schefuß, E., Sinninghe Damsté, J. S., and Schouten, S.: The C32 alkane-1,15-diol as a proxy of late Quaternary riverine input in coastal margins, Clim. Past, 13, 1049–1061, https://doi.org/10.5194/cp-13-1049-2017, 2017a.
Lattaud, J., Kim, J.-H., De Jonge, C., Zell, C., Sinninghe-Damsté, J.
S., and Schouten, S.: The C32 alkane-1,15-diol as a tracer for riverine
input in coastal seas, Geochim. Cosmochim. Ac., 202, 146–158,
https://doi.org/10.1016/j.gca.2016.12.030, 2017b.
Locarnini, M. M., Mishonov, A. V., Baranova, O. K., Boyer, T. P., Zweng, M.
M., Garcia, H. E., Reagan, J. R., Seidov, D., Weathers, K., Paver, C. R.,
and Smolyar, I.: World ocean atlas 2018, Vol 1: Temperature, Mishonov, A., Technical Editor, Silver Spring MD, NOAA Atlas NESDIS 81 [data set], p. 52., https://www.ncei.noaa.gov/access/world-ocean-atlas-2018/bin/woa18.pl?parameter=t (last access: 10 March 2022) 2018.
Lovecchio, E., Gruber, N., Münnich, M., and Lachkar, Z.: On the long-range offshore transport of organic carbon from the Canary Upwelling System to the open North Atlantic, Biogeosciences, 14, 3337–3369, https://doi.org/10.5194/bg-14-3337-2017, 2017.
Lovecchio, E., Gruber, N., and Münnich, M.: Mesoscale contribution to the long-range offshore transport of organic carbon from the Canary Upwelling System to the open North Atlantic, Biogeosciences, 15, 5061–5091, https://doi.org/10.5194/bg-15-5061-2018, 2018.
Mollenhauer, G., Basse, A., Kim, J.-H., Sinninghe Damsté, J. S., and
Fischer, G.: A four-year record of
Müller, P. J., Kirst, G., Ruhland, G., Von Storch, I., and
Rosell-Melé, A.: Calibration of the alkenone paleotemperature index
based on coretops from the eastern South Atlantic and global ocean
(60∘ N–60∘ S), Geochim. Cosmochim. Ac., 62, 1757–1772,
https://doi.org/10.1016/S0016-7037(98)00097-0, 1998.
Prahl, F. G. and Wakeham, S. G.: Calibration of unsaturation patterns in
long-chain ketone compositions for palaeotemperature assessment, Nature,
330, 367–369, https://doi.org/10.1038/330367a0, 1987.
Rampen, S. W., Schouten, S., Wakeham, S. G., and Sinninghe Damsté, J. S.: Seasonal and spatial variation in the sources and fluxes of long chain diols and mid-chain hydroxy methyl alkanoates in the Arabian Sea, Org. Geochem., 38, 165–179, https://doi.org/10.1016/j.orggeochem.2006.10.008, 2007.
Rampen, S. W., Schouten, S., Koning, E., Brummer, G.-J. A., and Sinninghe
Damsté, J. S.: A 90 kyr upwelling record from the northwestern Indian
Ocean using a novel long-chain diol index, Earth Planet. Sc. Lett., 276,
207–213, https://doi.org/10.1016/j.epsl.2008.09.022, 2008.
Rampen, S. W., Schouten, S., Schefuß, E., and Sinninghe Damsté, J.
S.: Impact of temperature on long chain diol and mid-chain hydroxy methyl
alkanoate composition in Proboscia diatoms: Results from culture and field studies,
Org. Geochem., 40, 1124–1131,
https://doi.org/10.1016/j.orggeochem.2009.08.005, 2009.
Rampen, S. W., Schouten, S., and Sinninghe Damsté, J. S.: Occurrence of long chain 1,14-diols in Apedinella radians, Org. Geochem., 42, 572–574, https://doi.org/10.1016/j.orggeochem.2011.03.009, 2011.
Rampen, S. W., Willmott, V., Kim, J.-H., Uliana, E., Mollenhauer, G.,
Schefuß, E., Sinninghe Damsté, J. S., and Schouten, S.: Long chain
1,13- and 1,15-diols as a potential proxy for palaeotemperature
reconstruction, Geochim. Cosmochim. Ac., 84, 204–216,
https://doi.org/10.1016/j.gca.2012.01.024, 2012.
Rampen, S. W., Willmott, V., Kim, J.-H., Rodrigo-Gámiz, M., Uliana, R.
E., Mollenhauer, G., Schefuß, E., Sinninghe Damsté, J. S., and
Schouten, S.: Evaluation of long chain 1,14-alkyl diols in marine sediments
as indicators for upwelling and temperature., Org. Geochem., 76, 39–47,
https://doi.org/10.1016/j.orggeochem.2014.07.012, 2014.
Redfield, A. C., Ketchum, B. H., and Richards, F. A.: The influence of
organisms on the composition of sea-water, in: The Sea, edited by: Hill, M.
N., Interscience, New York, 26–77, 554 pp., ISBN 978-0-674-01728-3, 1963.
Romero, O. E., Baumann, K.-H., Zonneveld, K. A. F., Donner, B., Hefter, J., Hamady, B., Pospelova, V., and Fischer, G.: Flux variability of phyto- and zooplankton communities in the Mauritanian coastal upwelling between 2003 and 2008, Biogeosciences, 17, 187–214, https://doi.org/10.5194/bg-17-187-2020, 2020.
Saha, K., Zhao, X., Zhang, H.-M., Casey, K. S., Zhang, D., Baker-Yeboah, S.,
Kilpatrick, K. A., Evans, R. H., Ryan, T., and Relph, J. M.: AVHRR Pathfinder
version 5.3 level3 collated (L3C) global 4 km sea surface temperature for
1981-Present, Dataset nceiPH53sstn1day_Lon360, NOAA National
Centers for Environmental Information [data set], https://doi.org/10.7289/v52j68xx, 2018.
Sinninghe Damsté, J. S., Rampen, S., Rijpstra, W. I. C., Abbas, B.,
Muyzer, G., and Schouten, S.: A diatomaceous origin for long-chain diols and
mid-chain hydroxy methyl alkanoates widely occurring in Quaternary marine
sediments: Indicators for high-nutrient conditions, Geochim. Cosmochim. Ac., 67, 1339–1348, https://doi.org/10.1016/S0016-7037(02)01225-5, 2003.
Sollich, M., Yoshinaga, M. Y., Häusler, S., Price, R. E., Hinrichs,
K.-U., and Bühring, S. I.: Heat stress dictates microbial lipid
composition along a thermal gradient in marine sediments, Front. Microbiol.,
8, 1550, https://doi.org/10.3389/fmicb.2017.01550, 2017.
Suutari, M. and Laakso, S.: Microbial fatty acids and thermal adaptation,
Crit. Rev. Microbiol., 20, 285–328,
https://doi.org/10.3109/10408419409113560, 1994.
Versteegh, G. J. M., Bosch, H. J., and de Leeuw, J. W.: Potential
palaeoenvironmental information of C24 to C30 mid-chain diols,
keto-ols and mid-chain hydroxy fatty acids; a critical review, Org.
Geochem., 27, 1–13, https://doi.org/10.1016/S0146-6380(97)00063-6, 1997.
Versteegh, G. J. M., Jansen, J. H. F., de Leeuw, J. W., and Schneider, R.
R.: Mid-chain diols and keto-ols in SE Atlantic sediments. A new tool for
tracing past sea surface water masses?, Geochim. Cosmochim. Ac., 64,
1879–1892, https://doi.org/10.1016/S0016-7037(99)00398-1, 2000.
Versteegh, G. J. M., Zonneveld, K. A. F., Hefter, J., Romero, O. E., Fischer, G., and Mollenhauer, G.: long-chain 1, mid-chain alkane-diol and accompanying environmental data for CBeu sediment trap (off Mauritania) samples from 2003 to 2008, PANGAEA [data set], https://doi.pangaea.de/10.1594/PANGAEA.940305, 2022.
Volkman, J. K., Barrett, S. M., Dunstan, G. A., and Jeffrey, S. W.:
C30–C32 alkyl diols and unsaturated alcohols in microalgae of the
class Eustigmatophyceae, Org. Geochem., 18, 131–138,
https://doi.org/10.1016/0146-6380(92)90150-V, 1992.
Volkman, J. K., Barrett, S. M., and Blackburn, S. I.: Eustigmatophyte
microalgae are potential sources of C29 sterols, C22–C28
n-alcohols and C28–C32 n-alkyl diols in freshwater environments,
Org. Geochem., 30, 307–318, https://doi.org/10.1016/S0146-6380(99)00009-1,
1999.
Willmott, V., Rampen, S. W., Domack, E., Canals, M., Sinninghe Damsté,
J. S., and Schouten, S.: Holocene changes in Proboscia diatom productivity in shelf
waters of the north-western Antarctic Peninsula, Antarct. Sci., 22, 3–10,
https://doi.org/10.1017/S095410200999037X, 2010.
Zweng, M. M., Reagan, J. R., Seidov, D., Boyer, T. P., Locarnini, M. M.,
Garcia, H. E., Mishonov, A. V., and Baranova, O. K.: World ocean atlas 2018,
Vol. 2: Salinity, edited by: , Weathers, K. W., Paver, C. R., and Smolyar, I. V., Mishonov, A., Technical Editor, Silver Spring MD, NOAA Atlas NESDIS 82 [data set], p. 50, https://www.ncei.noaa.gov/access/world-ocean-atlas-2018/bin/woa18.pl?parameter=s (last access: 10 March 2022), 2019.
Short summary
A 5-year record of long-chain mid-chain diol export flux and composition is presented with a 1- to 3-week resolution sediment trap CBeu (in the NW African upwelling). All environmental parameters as well as the diol composition are dominated by the seasonal cycle, albeit with different phase relations for temperature and upwelling. Most diol-based proxies are dominated by upwelling. The long-chain diol index reflects temperatures of the oligotrophic summer sea surface.
A 5-year record of long-chain mid-chain diol export flux and composition is presented with a 1-...
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