Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica)
Sangrà, Pablo et al.-- Trabajo presentado en el 2nd International Workshop Nonlinear Processes in Oceanic and Atmospheric Flow, celebrado en Madrid del 3 al 6 de julio de 2012. A high resolution interdisciplinary survey was conducted around the South Shetland Islands (SSI) during the austral summer...
Main Authors: | , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/110334 |
id |
ftcsic:oai:digital.csic.es:10261/110334 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/110334 2024-02-11T09:58:50+01:00 Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) Sangrà, Pablo García Muñoz, Cristina Lubián, Luis M. Estrada-Allis, S. 2012-07 http://hdl.handle.net/10261/110334 unknown 2nd International Workshop Nonlinear Processes in Oceanic and Atmospheric Flow (2012) http://hdl.handle.net/10261/110334 none comunicación de congreso http://purl.org/coar/resource_type/c_5794 2012 ftcsic 2024-01-16T10:05:04Z Sangrà, Pablo et al.-- Trabajo presentado en el 2nd International Workshop Nonlinear Processes in Oceanic and Atmospheric Flow, celebrado en Madrid del 3 al 6 de julio de 2012. A high resolution interdisciplinary survey was conducted around the South Shetland Islands (SSI) during the austral summer 2010. We observed that the Bransfield Current (BC) recirculates around the SSI originating a mesoscale anticyclonic eddy at the tip of SSI and a thermohaline front (SF) along the north face of the SSI. Theses structures complete the previously reported components of the Bransfield Current System that includes the BC, a shallow frontal region (PF) and a system of anticyclonic eddies (AE) between both structures (Sangrà et al., DSR, 2011) . We succeed to sample quasi-synoptically a transect through this rich mesoscale variability region that includes the PF, an AE, the BC and the SF. Nutrient samples indicate that phytoplankton growth could be limited by Iron only in those stations north of the SF. Phytoplankton properties distribution show a strong correlation with the physical environment linked to the above mesoscale structures. Mixed layer depth (MLD), turbulence profiler data and preliminary analysis of the dynamical stability combined with size-fractionated chlorophyll-a, Flow cytometry and FlowCam analysis suggest an increase/decrease of the percentage of large phytoplankton with the increase/decrease of the turbulence/instability degree of the physical environment. Chlorophyll concentrations well below the MLD and the euphotic layer suggest also a control of the phytoplankton distribution by ASC vertical cells at the BC and PF frontal regions. Peer Reviewed Conference Object Antarc* Antarctica South Shetland Islands Digital.CSIC (Spanish National Research Council) Austral Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) South Shetland Islands |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
Sangrà, Pablo et al.-- Trabajo presentado en el 2nd International Workshop Nonlinear Processes in Oceanic and Atmospheric Flow, celebrado en Madrid del 3 al 6 de julio de 2012. A high resolution interdisciplinary survey was conducted around the South Shetland Islands (SSI) during the austral summer 2010. We observed that the Bransfield Current (BC) recirculates around the SSI originating a mesoscale anticyclonic eddy at the tip of SSI and a thermohaline front (SF) along the north face of the SSI. Theses structures complete the previously reported components of the Bransfield Current System that includes the BC, a shallow frontal region (PF) and a system of anticyclonic eddies (AE) between both structures (Sangrà et al., DSR, 2011) . We succeed to sample quasi-synoptically a transect through this rich mesoscale variability region that includes the PF, an AE, the BC and the SF. Nutrient samples indicate that phytoplankton growth could be limited by Iron only in those stations north of the SF. Phytoplankton properties distribution show a strong correlation with the physical environment linked to the above mesoscale structures. Mixed layer depth (MLD), turbulence profiler data and preliminary analysis of the dynamical stability combined with size-fractionated chlorophyll-a, Flow cytometry and FlowCam analysis suggest an increase/decrease of the percentage of large phytoplankton with the increase/decrease of the turbulence/instability degree of the physical environment. Chlorophyll concentrations well below the MLD and the euphotic layer suggest also a control of the phytoplankton distribution by ASC vertical cells at the BC and PF frontal regions. Peer Reviewed |
format |
Conference Object |
author |
Sangrà, Pablo García Muñoz, Cristina Lubián, Luis M. Estrada-Allis, S. |
spellingShingle |
Sangrà, Pablo García Muñoz, Cristina Lubián, Luis M. Estrada-Allis, S. Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
author_facet |
Sangrà, Pablo García Muñoz, Cristina Lubián, Luis M. Estrada-Allis, S. |
author_sort |
Sangrà, Pablo |
title |
Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
title_short |
Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
title_full |
Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
title_fullStr |
Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
title_full_unstemmed |
Observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (ASC) in a non nutrient limited environment (Antarctica) |
title_sort |
observations on phytoplankton distribution/size structure modulation by turbulence/dynamical stability and ageostrophic secondary circulation (asc) in a non nutrient limited environment (antarctica) |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/110334 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) |
geographic |
Austral Pablo South Shetland Islands |
geographic_facet |
Austral Pablo South Shetland Islands |
genre |
Antarc* Antarctica South Shetland Islands |
genre_facet |
Antarc* Antarctica South Shetland Islands |
op_relation |
2nd International Workshop Nonlinear Processes in Oceanic and Atmospheric Flow (2012) http://hdl.handle.net/10261/110334 |
op_rights |
none |
_version_ |
1790594613559427072 |