Future climate evolution in the canary current upwelling system from a regional coupled model
The Canary current upwelling system (CCUS) is one of the major eastern boundary coastal upwelling systems in the world, bearing a high productive ecosystem and commercially important fisheries. The CCUS has a large latitudinal extension, and it is divided into upwelling zones with different characte...
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2023
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ftunivcadiz:oai:rodin.uca.es:10498/29231 2023-10-09T21:54:08+02:00 Future climate evolution in the canary current upwelling system from a regional coupled model Vázquez Medina, Rubén Izquierdo González, Alfredo Cabos Narváez, William Física Aplicada 2023-09-14T10:27:21Z application/pdf http://hdl.handle.net/10498/29231 eng eng http://hdl.handle.net/10498/29231 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Oceanografía física Canary current upwelling system (CCUS) climate regional coupled model doctoral thesis NA 2023 ftunivcadiz 2023-09-19T23:17:56Z The Canary current upwelling system (CCUS) is one of the major eastern boundary coastal upwelling systems in the world, bearing a high productive ecosystem and commercially important fisheries. The CCUS has a large latitudinal extension, and it is divided into upwelling zones with different characteristics. Eddies, filaments and other mesoscale processes characterize upwelling dynamics and are known to have an impact in the upwelling productivity. Thus, for a proper representation of the CCUS, a high horizontal resolution is required. In this study we assess present and future climate of the CCUS using an atmosphere¿ocean regionally coupled model. The regional coupled model consists of a global oceanic component with increased horizontal resolution along the northwestern African coast (reaching the 5 km in Cape Ghir) coupled to a high-resolution regional atmosphere (25 km), which extends its domain to the North Atlantic, including the whole CCUS region. We assess the model¿s present-time performance over the CCUS against relevant reanalysis data sets and compared with an ensemble of global climate models (GCMs) and an ensemble of atmosphere-only regional climate models (RCMs) to evaluate the role of the horizontal resolution. The coupled system reproduces the larger scale pattern of the CCUS and its latitudinal and seasonal variability over the coastal band, improving the GCMs outputs. The model properly reproduces mesoscale structures and is able to simulate the upwelling filaments events off Cape Ghir, which are not well represented in most of GCMs. Our results demonstrate the ability of the regionally coupled model to reproduce both the larger scale and mesoscale processes over the CCUS. Under RCP8.5 scenario in summer (winter), the upwelling favourable winds increase (decrease) along the Iberian coast and decrease (increase) for the African region. The model simulations suggest that the Azores high is the main driver of these variations in winter, while in summer, the changes are attributed to the ... Doctoral or Postdoctoral Thesis North Atlantic RODIN - Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz |
institution |
Open Polar |
collection |
RODIN - Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz |
op_collection_id |
ftunivcadiz |
language |
English |
topic |
Oceanografía física Canary current upwelling system (CCUS) climate regional coupled model |
spellingShingle |
Oceanografía física Canary current upwelling system (CCUS) climate regional coupled model Vázquez Medina, Rubén Future climate evolution in the canary current upwelling system from a regional coupled model |
topic_facet |
Oceanografía física Canary current upwelling system (CCUS) climate regional coupled model |
description |
The Canary current upwelling system (CCUS) is one of the major eastern boundary coastal upwelling systems in the world, bearing a high productive ecosystem and commercially important fisheries. The CCUS has a large latitudinal extension, and it is divided into upwelling zones with different characteristics. Eddies, filaments and other mesoscale processes characterize upwelling dynamics and are known to have an impact in the upwelling productivity. Thus, for a proper representation of the CCUS, a high horizontal resolution is required. In this study we assess present and future climate of the CCUS using an atmosphere¿ocean regionally coupled model. The regional coupled model consists of a global oceanic component with increased horizontal resolution along the northwestern African coast (reaching the 5 km in Cape Ghir) coupled to a high-resolution regional atmosphere (25 km), which extends its domain to the North Atlantic, including the whole CCUS region. We assess the model¿s present-time performance over the CCUS against relevant reanalysis data sets and compared with an ensemble of global climate models (GCMs) and an ensemble of atmosphere-only regional climate models (RCMs) to evaluate the role of the horizontal resolution. The coupled system reproduces the larger scale pattern of the CCUS and its latitudinal and seasonal variability over the coastal band, improving the GCMs outputs. The model properly reproduces mesoscale structures and is able to simulate the upwelling filaments events off Cape Ghir, which are not well represented in most of GCMs. Our results demonstrate the ability of the regionally coupled model to reproduce both the larger scale and mesoscale processes over the CCUS. Under RCP8.5 scenario in summer (winter), the upwelling favourable winds increase (decrease) along the Iberian coast and decrease (increase) for the African region. The model simulations suggest that the Azores high is the main driver of these variations in winter, while in summer, the changes are attributed to the ... |
author2 |
Izquierdo González, Alfredo Cabos Narváez, William Física Aplicada |
format |
Doctoral or Postdoctoral Thesis |
author |
Vázquez Medina, Rubén |
author_facet |
Vázquez Medina, Rubén |
author_sort |
Vázquez Medina, Rubén |
title |
Future climate evolution in the canary current upwelling system from a regional coupled model |
title_short |
Future climate evolution in the canary current upwelling system from a regional coupled model |
title_full |
Future climate evolution in the canary current upwelling system from a regional coupled model |
title_fullStr |
Future climate evolution in the canary current upwelling system from a regional coupled model |
title_full_unstemmed |
Future climate evolution in the canary current upwelling system from a regional coupled model |
title_sort |
future climate evolution in the canary current upwelling system from a regional coupled model |
publishDate |
2023 |
url |
http://hdl.handle.net/10498/29231 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://hdl.handle.net/10498/29231 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ open access |
_version_ |
1779317599890309120 |