Influence of ENSO on the Coastal Upwelling along Northwest Africa
The El Niño Southern Oscillation (ENSO) is known to influence global atmospheric and oceanic conditions through teleconnection effects. Further, it is also known that teleconnection effects are highly sensitive to ENSO diversity (the variation in the location of the warm SST anomalies). In this anal...
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ftzenodo:oai:zenodo.org:11069131 2024-09-15T18:24:07+00:00 Influence of ENSO on the Coastal Upwelling along Northwest Africa Sthitapragya, Ray Baranova-Parfenova, Elizaveta Cabrera, Andrea A. Guzmán, Diana Proklova, Daria 2024-04-26 https://doi.org/10.5281/zenodo.11069131 eng eng Zenodo https://youtu.be/Grlpch464jQ?feature=shared https://zenodo.org/communities/sciencematch https://doi.org/10.5281/zenodo.11069130 https://doi.org/10.5281/zenodo.11069131 oai:zenodo.org:11069131 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode CISP, Climatematch Impact Scholars Program 2023-2024, Virtual, 26 March 2024 EL NINO SOUTHERN OSCILLATION (ENSO) info:eu-repo/semantics/other 2024 ftzenodo https://doi.org/10.5281/zenodo.1106913110.5281/zenodo.11069130 2024-07-26T14:27:06Z The El Niño Southern Oscillation (ENSO) is known to influence global atmospheric and oceanic conditions through teleconnection effects. Further, it is also known that teleconnection effects are highly sensitive to ENSO diversity (the variation in the location of the warm SST anomalies). In this analysis, we have analysed the teleconnection between ENSO and the North West African (NWA) coastal upwelling system. This upwelling system consists of two parts: the northern part of coastline is a permanent upwelling system (with cool coastal SST prevalent throughout the year) and the southern part is a seasonal upwelling system (where cooler SSTs only occur along the coast in particular seasons). Coastal upwelling systems, characterised by the upward flow of cool nutrient-rich waters from the deeper ocean to its surface, produce hotspots of biological activity and are crucial for ocean productivity. Our analysis relied on a method called canonical correlation analysis (CCA,) which identifies strongly linked variations between two spatio-temporal fields. The dominant modes of Atlantic SST variability associated with Eastern Pacific warm SST anomalies (also known as canonical El Niño events,) and Central Pacific warm SST anomalies (also known as Modoki El Niño events) are presented in panels e and d, respectively. Canonical El Niño events are strongly correlated with coastal cooling (indicative of stronger coastal upwelling) along the Western Sahara with a lag of 4 months, while Modoki El Niño events are weakly correlated with coastal warming (indicative of weaker coastal upwelling) along the Western Sahara at a lag of 2-3 months. It is possible that these teleconnections result from the comparatively better (poorer) alignment of East Atlantic trade winds with the coast of Western Sahara following Canonical (Modoki) El Niño events. The Pacific-North Atlantic teleconnection is known to modulate Atlantic trade winds through the Walker cell (atmospheric bridge) and atmospheric Kelvin waves. Other/Unknown Material North Atlantic Zenodo |
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Open Polar |
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op_collection_id |
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language |
English |
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EL NINO SOUTHERN OSCILLATION (ENSO) |
spellingShingle |
EL NINO SOUTHERN OSCILLATION (ENSO) Sthitapragya, Ray Baranova-Parfenova, Elizaveta Cabrera, Andrea A. Guzmán, Diana Proklova, Daria Influence of ENSO on the Coastal Upwelling along Northwest Africa |
topic_facet |
EL NINO SOUTHERN OSCILLATION (ENSO) |
description |
The El Niño Southern Oscillation (ENSO) is known to influence global atmospheric and oceanic conditions through teleconnection effects. Further, it is also known that teleconnection effects are highly sensitive to ENSO diversity (the variation in the location of the warm SST anomalies). In this analysis, we have analysed the teleconnection between ENSO and the North West African (NWA) coastal upwelling system. This upwelling system consists of two parts: the northern part of coastline is a permanent upwelling system (with cool coastal SST prevalent throughout the year) and the southern part is a seasonal upwelling system (where cooler SSTs only occur along the coast in particular seasons). Coastal upwelling systems, characterised by the upward flow of cool nutrient-rich waters from the deeper ocean to its surface, produce hotspots of biological activity and are crucial for ocean productivity. Our analysis relied on a method called canonical correlation analysis (CCA,) which identifies strongly linked variations between two spatio-temporal fields. The dominant modes of Atlantic SST variability associated with Eastern Pacific warm SST anomalies (also known as canonical El Niño events,) and Central Pacific warm SST anomalies (also known as Modoki El Niño events) are presented in panels e and d, respectively. Canonical El Niño events are strongly correlated with coastal cooling (indicative of stronger coastal upwelling) along the Western Sahara with a lag of 4 months, while Modoki El Niño events are weakly correlated with coastal warming (indicative of weaker coastal upwelling) along the Western Sahara at a lag of 2-3 months. It is possible that these teleconnections result from the comparatively better (poorer) alignment of East Atlantic trade winds with the coast of Western Sahara following Canonical (Modoki) El Niño events. The Pacific-North Atlantic teleconnection is known to modulate Atlantic trade winds through the Walker cell (atmospheric bridge) and atmospheric Kelvin waves. |
format |
Other/Unknown Material |
author |
Sthitapragya, Ray Baranova-Parfenova, Elizaveta Cabrera, Andrea A. Guzmán, Diana Proklova, Daria |
author_facet |
Sthitapragya, Ray Baranova-Parfenova, Elizaveta Cabrera, Andrea A. Guzmán, Diana Proklova, Daria |
author_sort |
Sthitapragya, Ray |
title |
Influence of ENSO on the Coastal Upwelling along Northwest Africa |
title_short |
Influence of ENSO on the Coastal Upwelling along Northwest Africa |
title_full |
Influence of ENSO on the Coastal Upwelling along Northwest Africa |
title_fullStr |
Influence of ENSO on the Coastal Upwelling along Northwest Africa |
title_full_unstemmed |
Influence of ENSO on the Coastal Upwelling along Northwest Africa |
title_sort |
influence of enso on the coastal upwelling along northwest africa |
publisher |
Zenodo |
publishDate |
2024 |
url |
https://doi.org/10.5281/zenodo.11069131 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
CISP, Climatematch Impact Scholars Program 2023-2024, Virtual, 26 March 2024 |
op_relation |
https://youtu.be/Grlpch464jQ?feature=shared https://zenodo.org/communities/sciencematch https://doi.org/10.5281/zenodo.11069130 https://doi.org/10.5281/zenodo.11069131 oai:zenodo.org:11069131 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.1106913110.5281/zenodo.11069130 |
_version_ |
1810464422233112576 |