Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula

The region off southwestern Iberia (NE Atlantic) encompasses a wide variety of oceanographic regimes, including differently (geographic) oriented coastal areas impacted by upwelling, riverine inputs and submarine groundwater discharge, submarine canyons and seamounts, and open ocean waters, thereby...

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Main Authors: Krug, Lilian, Silvano, Kathleen M., Barbosa, Ana B., Domingues, Rita B., Galvão, Helena M., Luis, Joaquim, Platt, Trevor, Relvas, Paulo, Sathyendranath, Shubha
Format: Conference Object
Language:English
Published: 2012
Subjects:
Online Access:http://hdl.handle.net/10400.1/1906
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spelling ftunivalgarve:oai:sapientia.ualg.pt:10400.1/1906 2023-05-15T17:35:15+02:00 Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula Krug, Lilian Silvano, Kathleen M. Barbosa, Ana B. Domingues, Rita B. Galvão, Helena M. Luis, Joaquim Platt, Trevor Relvas, Paulo Sathyendranath, Shubha 2012 http://hdl.handle.net/10400.1/1906 eng eng Krug LA, Kathleen M. Silvano, Ana B. Barbosa, Rita B. Domingues, Helena M. Galvão, Joaquim Luís, Trevor Platt, Paulo Relvas and Shubha Sathyendranath, 2012. Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula. Proceedings Ocean Optics XXI Conference, October 8 - 12, 2012, Glasgow, Scotland, 11 p. http://hdl.handle.net/10400.1/1906 restrictedAccess Phytoplankton Chlorophyll Iberia Remote sensing Ocean color Upwelling patterns conferenceObject 2012 ftunivalgarve 2022-05-30T08:45:11Z The region off southwestern Iberia (NE Atlantic) encompasses a wide variety of oceanographic regimes, including differently (geographic) oriented coastal areas impacted by upwelling, riverine inputs and submarine groundwater discharge, submarine canyons and seamounts, and open ocean waters, thereby potentially promoting zone-specific phytoplankton dynamics. Overall, this heterogeneous region is classified as being very sensitive to climate change, and climate-driven alterations (e.g., sea surface warming, changes in upwelling patterns and intensity) have been recently reported for the area. The present study aims to understand the contribution of upwelling to seasonal and interannual variability of coastal phytoplankton, using a remote sensing-based approach. Phytoplankton variability was evaluated using satellite-derived chlorophyll-a (Chl-a), as a proxy for phytoplankton biomass, and primary productivity (PP). Chl-a were obtained from merged SeaWiFS (Seaviewing Wide Field-of-view Sensor), MeRIS (Medium Resolution Imaging Spectrometer) and MODIS-Aqua (Moderate-resolution Imaging Spectroradiometer) sensors at Globcolour portal. PP data at 9.25 km resolution were derived from Eppley’s Vertically Generalized Production Model, based on SeaWiFS and MODIS-Aqua and available at the Ocean Productivity site. Upwelling intensity was estimated using the difference in sea surface temperature (SST) between off and nearshore zones. Advanced Very-High Resolution Radiometer (AVHRR) 4 km SST were obtained from Pathfinder database. Other phytoplankton environmental drivers, such as local (e.g., river flow) and global (e.g., North Atlantic Oscillation - NAO) climate variables, were also analysed. The study area was divided into subareas differently impacted by upwelling and riverine flow, and satellitederived data was averaged for each zone. Seasonal and interannual variability covering a 14-year time series (1998- 2011) for each variable/region were explored. Chl-a at offshelf locations was significantly lower than coastal ... Conference Object North Atlantic North Atlantic oscillation Universidade do Algarve: Sapienta
institution Open Polar
collection Universidade do Algarve: Sapienta
op_collection_id ftunivalgarve
language English
topic Phytoplankton
Chlorophyll
Iberia
Remote sensing
Ocean color
Upwelling patterns
spellingShingle Phytoplankton
Chlorophyll
Iberia
Remote sensing
Ocean color
Upwelling patterns
Krug, Lilian
Silvano, Kathleen M.
Barbosa, Ana B.
Domingues, Rita B.
Galvão, Helena M.
Luis, Joaquim
Platt, Trevor
Relvas, Paulo
Sathyendranath, Shubha
Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
topic_facet Phytoplankton
Chlorophyll
Iberia
Remote sensing
Ocean color
Upwelling patterns
description The region off southwestern Iberia (NE Atlantic) encompasses a wide variety of oceanographic regimes, including differently (geographic) oriented coastal areas impacted by upwelling, riverine inputs and submarine groundwater discharge, submarine canyons and seamounts, and open ocean waters, thereby potentially promoting zone-specific phytoplankton dynamics. Overall, this heterogeneous region is classified as being very sensitive to climate change, and climate-driven alterations (e.g., sea surface warming, changes in upwelling patterns and intensity) have been recently reported for the area. The present study aims to understand the contribution of upwelling to seasonal and interannual variability of coastal phytoplankton, using a remote sensing-based approach. Phytoplankton variability was evaluated using satellite-derived chlorophyll-a (Chl-a), as a proxy for phytoplankton biomass, and primary productivity (PP). Chl-a were obtained from merged SeaWiFS (Seaviewing Wide Field-of-view Sensor), MeRIS (Medium Resolution Imaging Spectrometer) and MODIS-Aqua (Moderate-resolution Imaging Spectroradiometer) sensors at Globcolour portal. PP data at 9.25 km resolution were derived from Eppley’s Vertically Generalized Production Model, based on SeaWiFS and MODIS-Aqua and available at the Ocean Productivity site. Upwelling intensity was estimated using the difference in sea surface temperature (SST) between off and nearshore zones. Advanced Very-High Resolution Radiometer (AVHRR) 4 km SST were obtained from Pathfinder database. Other phytoplankton environmental drivers, such as local (e.g., river flow) and global (e.g., North Atlantic Oscillation - NAO) climate variables, were also analysed. The study area was divided into subareas differently impacted by upwelling and riverine flow, and satellitederived data was averaged for each zone. Seasonal and interannual variability covering a 14-year time series (1998- 2011) for each variable/region were explored. Chl-a at offshelf locations was significantly lower than coastal ...
format Conference Object
author Krug, Lilian
Silvano, Kathleen M.
Barbosa, Ana B.
Domingues, Rita B.
Galvão, Helena M.
Luis, Joaquim
Platt, Trevor
Relvas, Paulo
Sathyendranath, Shubha
author_facet Krug, Lilian
Silvano, Kathleen M.
Barbosa, Ana B.
Domingues, Rita B.
Galvão, Helena M.
Luis, Joaquim
Platt, Trevor
Relvas, Paulo
Sathyendranath, Shubha
author_sort Krug, Lilian
title Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
title_short Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
title_full Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
title_fullStr Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
title_full_unstemmed Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula
title_sort connections between upwelling patterns and phytoplankton variability under different coastal regimes in sw iberia peninsula
publishDate 2012
url http://hdl.handle.net/10400.1/1906
genre North Atlantic
North Atlantic oscillation
genre_facet North Atlantic
North Atlantic oscillation
op_relation Krug LA, Kathleen M. Silvano, Ana B. Barbosa, Rita B. Domingues, Helena M. Galvão, Joaquim Luís, Trevor Platt, Paulo Relvas and Shubha Sathyendranath, 2012. Connections between upwelling patterns and phytoplankton variability under different coastal regimes in SW Iberia Peninsula. Proceedings Ocean Optics XXI Conference, October 8 - 12, 2012, Glasgow, Scotland, 11 p.
http://hdl.handle.net/10400.1/1906
op_rights restrictedAccess
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