Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait
This study investigates the spatio-temporal variations in the chlorophyll- a (chl- a ) blooms in the Bransfield Strait (BS) at a climatological scale (1998–2018). We propose that suitable monitoring of these blooms can be achieved through remotely sensed observations only if the BS is divided follow...
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ftcopernicus:oai:publications.copernicus.org:egusphere114709 2024-06-23T07:51:50+00:00 Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait Veny, Marta Aguiar-González, Borja Marrero-Díaz, Ángeles Pereira-Vázquez, Tania Rodríguez-Santana, Ángel 2024-05-03 application/pdf https://doi.org/10.5194/egusphere-2023-2051 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2051/ eng eng doi:10.5194/egusphere-2023-2051 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2051/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2023-2051 2024-06-13T01:23:50Z This study investigates the spatio-temporal variations in the chlorophyll- a (chl- a ) blooms in the Bransfield Strait (BS) at a climatological scale (1998–2018). We propose that suitable monitoring of these blooms can be achieved through remotely sensed observations only if the BS is divided following the Peninsula Front (PF), which ultimately influences the phytoplankton assemblage. Our analysis is based on characterizing climatological fields of sea surface temperature (SST), air temperature, sea ice coverage, chl- a concentrations and wind stress, guided by synoptic novel and historical in situ observations which reveal two niches for phytoplankton assemblage: the Transitional Bellingshausen Water (TBW) and Transitional Weddell Water (TWW) pools. The TBW pool features stratified, less saline, warmer waters with shallow mixed layers, while the TWW pool features well-mixed, saltier, and colder waters. We identify that the 0.6 °C isotherm corresponds to the summertime climatological PF location, effectively dividing the BS into two different scenarios. Furthermore, the 0.5 mg m −3 chl- a isoline aligns well with the 0.6 °C isotherm, serving as a threshold for chl- a blooms of the highest concentrations around the South Shetland Islands. For the first time, these thresholds enable the monthly climatological descriptions of the two blooms developing in the BS on both sides of the PF. We think this approach underscores the potential of combining SST and chl- a data to monitor the year-to-year interplay of the chl- a blooms occurring in the TBW and TWW pools contoured by the PF. Text Bransfield Strait Sea ice South Shetland Islands Copernicus Publications: E-Journals Bransfield Strait South Shetland Islands Weddell |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
This study investigates the spatio-temporal variations in the chlorophyll- a (chl- a ) blooms in the Bransfield Strait (BS) at a climatological scale (1998–2018). We propose that suitable monitoring of these blooms can be achieved through remotely sensed observations only if the BS is divided following the Peninsula Front (PF), which ultimately influences the phytoplankton assemblage. Our analysis is based on characterizing climatological fields of sea surface temperature (SST), air temperature, sea ice coverage, chl- a concentrations and wind stress, guided by synoptic novel and historical in situ observations which reveal two niches for phytoplankton assemblage: the Transitional Bellingshausen Water (TBW) and Transitional Weddell Water (TWW) pools. The TBW pool features stratified, less saline, warmer waters with shallow mixed layers, while the TWW pool features well-mixed, saltier, and colder waters. We identify that the 0.6 °C isotherm corresponds to the summertime climatological PF location, effectively dividing the BS into two different scenarios. Furthermore, the 0.5 mg m −3 chl- a isoline aligns well with the 0.6 °C isotherm, serving as a threshold for chl- a blooms of the highest concentrations around the South Shetland Islands. For the first time, these thresholds enable the monthly climatological descriptions of the two blooms developing in the BS on both sides of the PF. We think this approach underscores the potential of combining SST and chl- a data to monitor the year-to-year interplay of the chl- a blooms occurring in the TBW and TWW pools contoured by the PF. |
format |
Text |
author |
Veny, Marta Aguiar-González, Borja Marrero-Díaz, Ángeles Pereira-Vázquez, Tania Rodríguez-Santana, Ángel |
spellingShingle |
Veny, Marta Aguiar-González, Borja Marrero-Díaz, Ángeles Pereira-Vázquez, Tania Rodríguez-Santana, Ángel Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
author_facet |
Veny, Marta Aguiar-González, Borja Marrero-Díaz, Ángeles Pereira-Vázquez, Tania Rodríguez-Santana, Ángel |
author_sort |
Veny, Marta |
title |
Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
title_short |
Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
title_full |
Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
title_fullStr |
Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
title_full_unstemmed |
Biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the Peninsula Front in the Bransfield Strait |
title_sort |
biophysical coupling of seasonal chlorophyll-a bloom variations and phytoplankton assemblages across the peninsula front in the bransfield strait |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2051 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2051/ |
geographic |
Bransfield Strait South Shetland Islands Weddell |
geographic_facet |
Bransfield Strait South Shetland Islands Weddell |
genre |
Bransfield Strait Sea ice South Shetland Islands |
genre_facet |
Bransfield Strait Sea ice South Shetland Islands |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2051 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2051/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2051 |
_version_ |
1802642971962638336 |