A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem
Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean. They are also climate sensitive, with both sea ice extent and glacial melt influencing their productivity. The Amundsen Sea Polynya (ASP)...
Published in: | Elementa: Science of the Anthropocene |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Uppsala universitet, Limnologi
2016
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Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311392 https://doi.org/10.12952/journal.elementa.000140 |
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ftuppsalauniv:oai:DiVA.org:uu-311392 |
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openpolar |
institution |
Open Polar |
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Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
spellingShingle |
Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Yager, Patricia L. Sherrell, R. M. Stammerjohn, S. E. Ducklow, H. W. Schofield, O. M E. Ingall, E. D. Wilson, S. E. Lowry, K. E. Williams, C. M. Riemann, Lasse Bertilsson, Stefan Alderkamp, A-C Dinasquet, J. Logares, R. Richert, Inga Sipler, R.E. Melara, A.J. Mu, L. Newstead, R.G. Post, A.F. Swalethorp, R. van Dijken, G.L. A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
topic_facet |
Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
description |
Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean. They are also climate sensitive, with both sea ice extent and glacial melt influencing their productivity. The Amundsen Sea Polynya (ASP) is the greenest polynya in the Southern Ocean, with summertime chlorophyll a concentrations exceeding 20 µg L−1. During the Amundsen Sea Polynya International Research Expedition (ASPIRE) in austral summer 2010–11, we aimed to determine the fate of this high algal productivity. We collected water column profiles for total dissolved inorganic carbon (DIC) and nutrients, particulate and dissolved organic matter, chlorophyll a, mesozooplankton, and microbial biomass to make a carbon budget for this ecosystem. We also measured primary and secondary production, community respiration rates, vertical particle flux and fecal pellet production and grazing. With observations arranged along a gradient of increasing integrated dissolved inorganic nitrogen drawdown (ΔDIN; 0.027–0.74 mol N m−2), changes in DIC in the upper water column (ranging from 0.2 to 4.7 mol C m−2) and gas exchange (0–1.7 mol C m−2) were combined to estimate early season net community production (sNCP; 0.2–5.9 mol C m−2) and then compared to organic matter inventories to estimate export. From a phytoplankton bloom dominated by Phaeocystis antarctica, a high fraction (up to ~60%) of sNCP was exported to sub-euphotic depths. Microbial respiration remineralized much of this export in the mid waters. Comparisons to short-term (2–3 days) drifting traps and a year-long moored sediment trap capturing the downward flux confirmed that a relatively high fraction (3–6%) of the export from ~100 m made it through the mid waters to depth. We discuss the climate-sensitive nature of these carbon fluxes, in light of the changing sea ice cover and melting ice sheets in the region. Part of an Elementa Special Feature ASPIRE: The Amundsen Sea Polynya International Research ... |
format |
Article in Journal/Newspaper |
author |
Yager, Patricia L. Sherrell, R. M. Stammerjohn, S. E. Ducklow, H. W. Schofield, O. M E. Ingall, E. D. Wilson, S. E. Lowry, K. E. Williams, C. M. Riemann, Lasse Bertilsson, Stefan Alderkamp, A-C Dinasquet, J. Logares, R. Richert, Inga Sipler, R.E. Melara, A.J. Mu, L. Newstead, R.G. Post, A.F. Swalethorp, R. van Dijken, G.L. |
author_facet |
Yager, Patricia L. Sherrell, R. M. Stammerjohn, S. E. Ducklow, H. W. Schofield, O. M E. Ingall, E. D. Wilson, S. E. Lowry, K. E. Williams, C. M. Riemann, Lasse Bertilsson, Stefan Alderkamp, A-C Dinasquet, J. Logares, R. Richert, Inga Sipler, R.E. Melara, A.J. Mu, L. Newstead, R.G. Post, A.F. Swalethorp, R. van Dijken, G.L. |
author_sort |
Yager, Patricia L. |
title |
A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
title_short |
A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
title_full |
A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
title_fullStr |
A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
title_full_unstemmed |
A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem |
title_sort |
carbon budget for the amundsen sea polynya, antarctica : estimating net community production and export in a highly productive polar ecosystem |
publisher |
Uppsala universitet, Limnologi |
publishDate |
2016 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311392 https://doi.org/10.12952/journal.elementa.000140 |
geographic |
Amundsen Sea Austral Southern Ocean |
geographic_facet |
Amundsen Sea Austral Southern Ocean |
genre |
Amundsen Sea Antarc* Antarctica Mesozooplankton Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctica Mesozooplankton Sea ice Southern Ocean |
op_relation |
Elementa : Science of the Anthropocene, 2016, 4, http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311392 doi:10.12952/journal.elementa.000140 ISI:000389924300002 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.12952/journal.elementa.000140 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
4 |
container_start_page |
000140 |
_version_ |
1766374473626288128 |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-311392 2023-05-15T13:23:44+02:00 A carbon budget for the Amundsen Sea Polynya, Antarctica : estimating net community production and export in a highly productive polar ecosystem Yager, Patricia L. Sherrell, R. M. Stammerjohn, S. E. Ducklow, H. W. Schofield, O. M E. Ingall, E. D. Wilson, S. E. Lowry, K. E. Williams, C. M. Riemann, Lasse Bertilsson, Stefan Alderkamp, A-C Dinasquet, J. Logares, R. Richert, Inga Sipler, R.E. Melara, A.J. Mu, L. Newstead, R.G. Post, A.F. Swalethorp, R. van Dijken, G.L. 2016 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311392 https://doi.org/10.12952/journal.elementa.000140 eng eng Uppsala universitet, Limnologi Uppsala universitet, Science for Life Laboratory, SciLifeLab Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA Rutgers State Univ, Dept Marine & Coastal Sci, New Brunswick, NJ USA Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA Bangor Univ, Sch Ocean Sci, Bangor, Gwynedd, Wales Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA Univ Copenhagen, Marine Biol Sect, Helsingor, Denmark Univ Copenhagen, Marine Biol Sect, Helsingor, Denmark; Linnaeus Univ, Dept Nat Sci, Kalmar, Sweden CSIC, Inst Marine Sci, Barcelona, Spain Coll William & Mary, Virginia Inst Marine Sci, Gloucester Pt, VA USA Florida Atlantic Univ, Oceanog Inst, Harbor Branch, Boca Raton, FL 33431 USA Tech Univ Denmark, Sect Oceanog & Climate, Natl Inst Aquat Resources DTU Aqua, Charlottenlund, Denmark; Univ Gothenburg, Dept Biol & Environm Sci, Gothenburg, Sweden Elementa : Science of the Anthropocene, 2016, 4, http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-311392 doi:10.12952/journal.elementa.000140 ISI:000389924300002 info:eu-repo/semantics/openAccess Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Article in journal info:eu-repo/semantics/article text 2016 ftuppsalauniv https://doi.org/10.12952/journal.elementa.000140 2023-02-23T21:53:54Z Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean. They are also climate sensitive, with both sea ice extent and glacial melt influencing their productivity. The Amundsen Sea Polynya (ASP) is the greenest polynya in the Southern Ocean, with summertime chlorophyll a concentrations exceeding 20 µg L−1. During the Amundsen Sea Polynya International Research Expedition (ASPIRE) in austral summer 2010–11, we aimed to determine the fate of this high algal productivity. We collected water column profiles for total dissolved inorganic carbon (DIC) and nutrients, particulate and dissolved organic matter, chlorophyll a, mesozooplankton, and microbial biomass to make a carbon budget for this ecosystem. We also measured primary and secondary production, community respiration rates, vertical particle flux and fecal pellet production and grazing. With observations arranged along a gradient of increasing integrated dissolved inorganic nitrogen drawdown (ΔDIN; 0.027–0.74 mol N m−2), changes in DIC in the upper water column (ranging from 0.2 to 4.7 mol C m−2) and gas exchange (0–1.7 mol C m−2) were combined to estimate early season net community production (sNCP; 0.2–5.9 mol C m−2) and then compared to organic matter inventories to estimate export. From a phytoplankton bloom dominated by Phaeocystis antarctica, a high fraction (up to ~60%) of sNCP was exported to sub-euphotic depths. Microbial respiration remineralized much of this export in the mid waters. Comparisons to short-term (2–3 days) drifting traps and a year-long moored sediment trap capturing the downward flux confirmed that a relatively high fraction (3–6%) of the export from ~100 m made it through the mid waters to depth. We discuss the climate-sensitive nature of these carbon fluxes, in light of the changing sea ice cover and melting ice sheets in the region. Part of an Elementa Special Feature ASPIRE: The Amundsen Sea Polynya International Research ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Mesozooplankton Sea ice Southern Ocean Uppsala University: Publications (DiVA) Amundsen Sea Austral Southern Ocean Elementa: Science of the Anthropocene 4 000140 |