Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica)
King George Island (KGI, Isla 25 de Mayo) is located within one of the most rapidly warming regions on Earth at the north-western tip of the Antarctic Peninsula. Since 1991 hydrographical characteristics and phytoplankton dynamics were monitored at two stations in Potter Cove, a fjord-like environme...
Published in: | Journal of Marine Systems |
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Online Access: | http://hdl.handle.net/2078/122131 https://doi.org/10.1016/j.jmarsys.2011.10.006 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:122131 2024-05-12T07:53:15+00:00 Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) Schloss, Irène Abele, Doris Moreau, Sébastien Demers, Serge Bers, Valeria González, Oscar Ferreyra, Gustavo A. UCL - SST/ELI - Earth and Life Institute Université du Québec - Institut des sciences de la mer de Rimouski 2012 http://hdl.handle.net/2078/122131 https://doi.org/10.1016/j.jmarsys.2011.10.006 eng eng boreal:122131 http://hdl.handle.net/2078/122131 doi:10.1016/j.jmarsys.2011.10.006 urn:ISSN:0924-7963 info:eu-repo/semantics/restrictedAccess Journal of Marine Systems, Vol. 92, no.1, p. 53-66 (2012) Antarctica Phytoplankton Hydrography Particulate matter SAM Temperature Coastal fjord-like system info:eu-repo/semantics/article 2012 ftunistlouisbrus https://doi.org/10.1016/j.jmarsys.2011.10.006 2024-04-18T18:02:24Z King George Island (KGI, Isla 25 de Mayo) is located within one of the most rapidly warming regions on Earth at the north-western tip of the Antarctic Peninsula. Since 1991 hydrographical characteristics and phytoplankton dynamics were monitored at two stations in Potter Cove, a fjord-like environment on the south-eastern KGI coastline. Seawater temperature and salinity, total suspended particulate matter (TSPM) and chlorophyll-a (Chl-a, a proxy for phytoplankton biomass) concentrations were measured in summer and winter over a 19-year period, together with local air temperature. Mean air temperatures rose by 0.39 and 0.48°C per decade in summer and winter, respectively. Positive anomalies characterized wind speeds during the decade between the mid '90 and the mid 2000years, whereas negative anomalies were observed from 2004 onwards. Day of sea ice formation and retreat, based on satellite data, did not change, although total sea ice cover diminished during the studied period. Surface water temperature increased during summer (0.36°C per decade), whereas no trend was observed in salinity. Summer Chl-a concentrations were around 1mgm -3 Chl-a with no clear trend throughout the study period. TSPM increased in surface waters of the inner cove during the spring-summer months. The Southern Annular Mode (SAM) climate signal was apparent in the fluctuating interannual pattcern of the hydrographic variables in the outer Potter Cove and bottom waters whereas surface hydrography was strongly governed by the local forcing of glacier melt. The results show that global trends have significant effects on local hydrographical and biological conditions in the coastal marine environments of Western Antarctica. © 2011 Elsevier B.V. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Isla 25 de Mayo King George Island Sea ice DIAL@USL-B (Université Saint-Louis, Bruxelles) 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic Antarctic Peninsula isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) King George Island Potter Cove The Antarctic Journal of Marine Systems 92 1 53 66 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
Antarctica Phytoplankton Hydrography Particulate matter SAM Temperature Coastal fjord-like system |
spellingShingle |
Antarctica Phytoplankton Hydrography Particulate matter SAM Temperature Coastal fjord-like system Schloss, Irène Abele, Doris Moreau, Sébastien Demers, Serge Bers, Valeria González, Oscar Ferreyra, Gustavo A. Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
topic_facet |
Antarctica Phytoplankton Hydrography Particulate matter SAM Temperature Coastal fjord-like system |
description |
King George Island (KGI, Isla 25 de Mayo) is located within one of the most rapidly warming regions on Earth at the north-western tip of the Antarctic Peninsula. Since 1991 hydrographical characteristics and phytoplankton dynamics were monitored at two stations in Potter Cove, a fjord-like environment on the south-eastern KGI coastline. Seawater temperature and salinity, total suspended particulate matter (TSPM) and chlorophyll-a (Chl-a, a proxy for phytoplankton biomass) concentrations were measured in summer and winter over a 19-year period, together with local air temperature. Mean air temperatures rose by 0.39 and 0.48°C per decade in summer and winter, respectively. Positive anomalies characterized wind speeds during the decade between the mid '90 and the mid 2000years, whereas negative anomalies were observed from 2004 onwards. Day of sea ice formation and retreat, based on satellite data, did not change, although total sea ice cover diminished during the studied period. Surface water temperature increased during summer (0.36°C per decade), whereas no trend was observed in salinity. Summer Chl-a concentrations were around 1mgm -3 Chl-a with no clear trend throughout the study period. TSPM increased in surface waters of the inner cove during the spring-summer months. The Southern Annular Mode (SAM) climate signal was apparent in the fluctuating interannual pattcern of the hydrographic variables in the outer Potter Cove and bottom waters whereas surface hydrography was strongly governed by the local forcing of glacier melt. The results show that global trends have significant effects on local hydrographical and biological conditions in the coastal marine environments of Western Antarctica. © 2011 Elsevier B.V. |
author2 |
UCL - SST/ELI - Earth and Life Institute Université du Québec - Institut des sciences de la mer de Rimouski |
format |
Article in Journal/Newspaper |
author |
Schloss, Irène Abele, Doris Moreau, Sébastien Demers, Serge Bers, Valeria González, Oscar Ferreyra, Gustavo A. |
author_facet |
Schloss, Irène Abele, Doris Moreau, Sébastien Demers, Serge Bers, Valeria González, Oscar Ferreyra, Gustavo A. |
author_sort |
Schloss, Irène |
title |
Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
title_short |
Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
title_full |
Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
title_fullStr |
Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
title_full_unstemmed |
Response of phytoplankton dynamics to 19-year (1991-2009) climate trends in Potter Cove (Antarctica) |
title_sort |
response of phytoplankton dynamics to 19-year (1991-2009) climate trends in potter cove (antarctica) |
publishDate |
2012 |
url |
http://hdl.handle.net/2078/122131 https://doi.org/10.1016/j.jmarsys.2011.10.006 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
25 de Mayo Antarctic Antarctic Peninsula isla 25 de Mayo King George Island Potter Cove The Antarctic |
geographic_facet |
25 de Mayo Antarctic Antarctic Peninsula isla 25 de Mayo King George Island Potter Cove The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Isla 25 de Mayo King George Island Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Isla 25 de Mayo King George Island Sea ice |
op_source |
Journal of Marine Systems, Vol. 92, no.1, p. 53-66 (2012) |
op_relation |
boreal:122131 http://hdl.handle.net/2078/122131 doi:10.1016/j.jmarsys.2011.10.006 urn:ISSN:0924-7963 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2011.10.006 |
container_title |
Journal of Marine Systems |
container_volume |
92 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
66 |
_version_ |
1798841718846521344 |