Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis
We analyzed 20 years (1993–2013) of observations of dissolved inorganic macronutrients (nitrate, N; phosphate, P; and silicate, Si) and chlorophyll a (Chl) at Palmer Station, Antarctica (64.8°S, 64.1°W) to elucidate how large-scale climate and local physical forcing affect the interannual variabilit...
Published in: | Journal of Geophysical Research: Biogeosciences |
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American Geophysical Union
2016
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Online Access: | http://nora.nerc.ac.uk/id/eprint/512468/ https://nora.nerc.ac.uk/id/eprint/512468/1/Kim_et_al-2016-Journal_of_Geophysical_Research__Biogeosciences.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JG003311/full |
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ftnerc:oai:nora.nerc.ac.uk:512468 2023-05-15T13:49:32+02:00 Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis Kim, Hyewon Doney, Scott C. Iannuzzi, Richard A. Meredith, Michael P. Martinson, Douglas G. Ducklow, Hugh W. 2016-09 text http://nora.nerc.ac.uk/id/eprint/512468/ https://nora.nerc.ac.uk/id/eprint/512468/1/Kim_et_al-2016-Journal_of_Geophysical_Research__Biogeosciences.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JG003311/full en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/512468/1/Kim_et_al-2016-Journal_of_Geophysical_Research__Biogeosciences.pdf Kim, Hyewon; Doney, Scott C.; Iannuzzi, Richard A.; Meredith, Michael P. orcid:0000-0002-7342-7756 Martinson, Douglas G.; Ducklow, Hugh W. 2016 Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis. Journal of Geophysical Research: Biogeosciences, 121 (9). 2369-2389. https://doi.org/10.1002/2015JG003311 <https://doi.org/10.1002/2015JG003311> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2015JG003311 2023-02-04T19:42:27Z We analyzed 20 years (1993–2013) of observations of dissolved inorganic macronutrients (nitrate, N; phosphate, P; and silicate, Si) and chlorophyll a (Chl) at Palmer Station, Antarctica (64.8°S, 64.1°W) to elucidate how large-scale climate and local physical forcing affect the interannual variability in the seasonal phytoplankton bloom and associated drawdown of nutrients. The leading modes of nutrients (N, P, and Si empirical orthogonal functions 1, EOF1) represent overall negative anomalies throughout growing seasons, showing a mixed signal of variability in the initial levels and drawdown thereafter (low-frequency dynamics). The second most common seasonal patterns of nitrate and phosphate (N and P EOF2) capture prolonged drawdown events during December–March, which are correlated to Chl EOF1. Si EOF2 captures a drawdown event during November–December, which is correlated to Chl EOF2. These different drawdown patterns are shaped by different sets of physical and climate forcing mechanisms. N and P drawdown events during December–March are influenced by the winter and spring Southern Annular Mode (SAM) phase, where nutrient utilization is enhanced in a stabilized upper water column as a consequence of SAM-driven winter sea ice and spring wind dynamics. Si drawdown during November–December is influenced by early sea ice retreat, where ice breakup may induce abrupt water column stratification and a subsequent diatom bloom or release of diatom cells from within the sea ice. Our findings underscore that seasonal nutrient dynamics in the coastal WAP are coupled to large-scale climate forcing and related physics, understanding of which may enable improved projections of biogeochemical responses to climate change. Article in Journal/Newspaper Antarc* Antarctica Sea ice Natural Environment Research Council: NERC Open Research Archive Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Journal of Geophysical Research: Biogeosciences 121 9 2369 2389 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
We analyzed 20 years (1993–2013) of observations of dissolved inorganic macronutrients (nitrate, N; phosphate, P; and silicate, Si) and chlorophyll a (Chl) at Palmer Station, Antarctica (64.8°S, 64.1°W) to elucidate how large-scale climate and local physical forcing affect the interannual variability in the seasonal phytoplankton bloom and associated drawdown of nutrients. The leading modes of nutrients (N, P, and Si empirical orthogonal functions 1, EOF1) represent overall negative anomalies throughout growing seasons, showing a mixed signal of variability in the initial levels and drawdown thereafter (low-frequency dynamics). The second most common seasonal patterns of nitrate and phosphate (N and P EOF2) capture prolonged drawdown events during December–March, which are correlated to Chl EOF1. Si EOF2 captures a drawdown event during November–December, which is correlated to Chl EOF2. These different drawdown patterns are shaped by different sets of physical and climate forcing mechanisms. N and P drawdown events during December–March are influenced by the winter and spring Southern Annular Mode (SAM) phase, where nutrient utilization is enhanced in a stabilized upper water column as a consequence of SAM-driven winter sea ice and spring wind dynamics. Si drawdown during November–December is influenced by early sea ice retreat, where ice breakup may induce abrupt water column stratification and a subsequent diatom bloom or release of diatom cells from within the sea ice. Our findings underscore that seasonal nutrient dynamics in the coastal WAP are coupled to large-scale climate forcing and related physics, understanding of which may enable improved projections of biogeochemical responses to climate change. |
format |
Article in Journal/Newspaper |
author |
Kim, Hyewon Doney, Scott C. Iannuzzi, Richard A. Meredith, Michael P. Martinson, Douglas G. Ducklow, Hugh W. |
spellingShingle |
Kim, Hyewon Doney, Scott C. Iannuzzi, Richard A. Meredith, Michael P. Martinson, Douglas G. Ducklow, Hugh W. Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
author_facet |
Kim, Hyewon Doney, Scott C. Iannuzzi, Richard A. Meredith, Michael P. Martinson, Douglas G. Ducklow, Hugh W. |
author_sort |
Kim, Hyewon |
title |
Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
title_short |
Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
title_full |
Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
title_fullStr |
Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
title_full_unstemmed |
Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis |
title_sort |
climate forcing for dynamics of dissolved inorganic nutrients at palmer station, antarctica: an interdecadal (1993-2013) analysis |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/512468/ https://nora.nerc.ac.uk/id/eprint/512468/1/Kim_et_al-2016-Journal_of_Geophysical_Research__Biogeosciences.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JG003311/full |
long_lat |
ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) |
geographic |
Palmer Station Palmer-Station |
geographic_facet |
Palmer Station Palmer-Station |
genre |
Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/512468/1/Kim_et_al-2016-Journal_of_Geophysical_Research__Biogeosciences.pdf Kim, Hyewon; Doney, Scott C.; Iannuzzi, Richard A.; Meredith, Michael P. orcid:0000-0002-7342-7756 Martinson, Douglas G.; Ducklow, Hugh W. 2016 Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993-2013) analysis. Journal of Geophysical Research: Biogeosciences, 121 (9). 2369-2389. https://doi.org/10.1002/2015JG003311 <https://doi.org/10.1002/2015JG003311> |
op_doi |
https://doi.org/10.1002/2015JG003311 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
121 |
container_issue |
9 |
container_start_page |
2369 |
op_container_end_page |
2389 |
_version_ |
1766251516897787904 |