Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean
In the Ocean, the seasonal cycle is the mode that couples climate forcing to ecosystem response in production, diversity and carbon export. A better characterisation of the ecosystem's seasonal cycle therefore addresses an important gap in our ability to estimate the sensitivity of the biologic...
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Language: | English |
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Online Access: | http://hdl.handle.net/11427/34228 https://open.uct.ac.za/bitstream/11427/34228/1/ThomallaSJ_Regional_scale_2011.pdf |
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ftunivcapetownir:oai:localhost:11427/34228 2023-05-15T13:32:17+02:00 Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean Thomalla, S J Fauchereau, N Swart, S Monteiro, P M S 2011 application/pdf http://hdl.handle.net/11427/34228 https://open.uct.ac.za/bitstream/11427/34228/1/ThomallaSJ_Regional_scale_2011.pdf eng eng Faculty of Science Department of Oceanography http://hdl.handle.net/11427/34228 https://open.uct.ac.za/bitstream/11427/34228/1/ThomallaSJ_Regional_scale_2011.pdf Biogeosciences https://dx.doi.org/10.5194/bg-8-2849-2011 8 10 2849 - 2866 Burns Disaster Planning Humans Mass Casualty Incidents National Health Programs Practice Guidelines as Topic Societies Medical South Africa Journal Article 2011 ftunivcapetownir https://doi.org/10.5194/bg-8-2849-2011 2022-09-13T05:54:37Z In the Ocean, the seasonal cycle is the mode that couples climate forcing to ecosystem response in production, diversity and carbon export. A better characterisation of the ecosystem's seasonal cycle therefore addresses an important gap in our ability to estimate the sensitivity of the biological pump to climate change. In this study, the regional characteristics of the seasonal cycle of phytoplankton biomass in the Southern Ocean are examined in terms of the timing of the bloom initiation, its amplitude, regional scale variability and the importance of the climatological seasonal cycle in explaining the overall variance. The seasonal cycle was consequently defined into four broad zonal regions; the subtropical zone (STZ), the transition zone (TZ), the Antarctic circumpolar zone (ACZ) and the marginal ice zone (MIZ). Defining the Southern Ocean according to the characteristics of its seasonal cycle provides a more dynamic understanding of ocean productivity based on underlying physical drivers rather than climatological biomass. The response of the biology to the underlying physics of the different seasonal zones resulted in an additional classification of four regions based on the extent of inter-annual seasonal phase locking and the magnitude of the integrated seasonal biomass. This regionalisation contributes towards an improved understanding of the regional differences in the sensitivity of the Southern Oceans ecosystem to climate forcing, potentially allowing more robust predictions of the effects of long term climate trends. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Cape Town: OpenUCT Antarctic Southern Ocean The Antarctic Biogeosciences 8 10 2849 2866 |
institution |
Open Polar |
collection |
University of Cape Town: OpenUCT |
op_collection_id |
ftunivcapetownir |
language |
English |
topic |
Burns Disaster Planning Humans Mass Casualty Incidents National Health Programs Practice Guidelines as Topic Societies Medical South Africa |
spellingShingle |
Burns Disaster Planning Humans Mass Casualty Incidents National Health Programs Practice Guidelines as Topic Societies Medical South Africa Thomalla, S J Fauchereau, N Swart, S Monteiro, P M S Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
topic_facet |
Burns Disaster Planning Humans Mass Casualty Incidents National Health Programs Practice Guidelines as Topic Societies Medical South Africa |
description |
In the Ocean, the seasonal cycle is the mode that couples climate forcing to ecosystem response in production, diversity and carbon export. A better characterisation of the ecosystem's seasonal cycle therefore addresses an important gap in our ability to estimate the sensitivity of the biological pump to climate change. In this study, the regional characteristics of the seasonal cycle of phytoplankton biomass in the Southern Ocean are examined in terms of the timing of the bloom initiation, its amplitude, regional scale variability and the importance of the climatological seasonal cycle in explaining the overall variance. The seasonal cycle was consequently defined into four broad zonal regions; the subtropical zone (STZ), the transition zone (TZ), the Antarctic circumpolar zone (ACZ) and the marginal ice zone (MIZ). Defining the Southern Ocean according to the characteristics of its seasonal cycle provides a more dynamic understanding of ocean productivity based on underlying physical drivers rather than climatological biomass. The response of the biology to the underlying physics of the different seasonal zones resulted in an additional classification of four regions based on the extent of inter-annual seasonal phase locking and the magnitude of the integrated seasonal biomass. This regionalisation contributes towards an improved understanding of the regional differences in the sensitivity of the Southern Oceans ecosystem to climate forcing, potentially allowing more robust predictions of the effects of long term climate trends. |
format |
Article in Journal/Newspaper |
author |
Thomalla, S J Fauchereau, N Swart, S Monteiro, P M S |
author_facet |
Thomalla, S J Fauchereau, N Swart, S Monteiro, P M S |
author_sort |
Thomalla, S J |
title |
Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
title_short |
Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
title_full |
Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
title_fullStr |
Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
title_full_unstemmed |
Regional scale characteristics of the seasonal cycle of chlorophyll in the Southern Ocean |
title_sort |
regional scale characteristics of the seasonal cycle of chlorophyll in the southern ocean |
publisher |
Faculty of Science |
publishDate |
2011 |
url |
http://hdl.handle.net/11427/34228 https://open.uct.ac.za/bitstream/11427/34228/1/ThomallaSJ_Regional_scale_2011.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Biogeosciences https://dx.doi.org/10.5194/bg-8-2849-2011 8 10 2849 - 2866 |
op_relation |
http://hdl.handle.net/11427/34228 https://open.uct.ac.za/bitstream/11427/34228/1/ThomallaSJ_Regional_scale_2011.pdf |
op_doi |
https://doi.org/10.5194/bg-8-2849-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
10 |
container_start_page |
2849 |
op_container_end_page |
2866 |
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1766025671130218496 |