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...
Main Authors: | , , , , , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10400.1/1906 |
id |
ftunivalgarve:oai:sapientia.ualg.pt:10400.1/1906 |
---|---|
record_format |
openpolar |
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 |
_version_ |
1766134349091045376 |