Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM
Trabajo presentado en EGU General Assembly, celebrada en modalidad virtual del 19 al 30 de abril de 2021. The Antarctic Peninsula is one of the most affected regions in a warming climate. Climate change not only involves rising air temperatures or changing precipitation patterns, but also wind. Over...
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ftcsic:oai:digital.csic.es:10261/266936 2024-02-11T09:57:34+01:00 Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM Andrés-Martín, M. Azorín-Molina, César Utrabo-Carazo, Eduardo Bedoya-Valest, Shalenys 2021-04-19 http://hdl.handle.net/10261/266936 https://doi.org/10.5194/egusphere-egu21-8706 unknown Copernicus Publications Publisher's version https://doi.org/10.5194/egusphere-egu21-8706 Sí EGU General Assembly (2021) http://hdl.handle.net/10261/266936 doi:10.5194/egusphere-egu21-8706 open comunicación de congreso http://purl.org/coar/resource_type/c_5794 2021 ftcsic https://doi.org/10.5194/egusphere-egu21-8706 2024-01-16T11:23:00Z Trabajo presentado en EGU General Assembly, celebrada en modalidad virtual del 19 al 30 de abril de 2021. The Antarctic Peninsula is one of the most affected regions in a warming climate. Climate change not only involves rising air temperatures or changing precipitation patterns, but also wind. Over the past few decades, one of the most prominent changes in the near-Antarctic climate has been the southward shift of the westerly winds, associated with a positive trend in the Southern Annular Mode index (SAM). Some studies revealed that the poleward shift of the westerlies results in an increased in the seasonality of the coastal easterlies, concretely an increase in the difference between weak easterly winds in summer and strong easterlies in winter. The assessment and attribution of the variability of the easterly winds that encircle the coastline is crucial due to its influence e.g. (i) in the sea ice formation and export, (ii) a variation in the easterly winds can modify the Antarctic Bottom Water formation and properties, (iii) the heat transport trough the continent. Due to operational challenges of measuring weather data in the Antarctic region, there are few long-terms time series and studies dealing with wind trends and variability. In this work, wind series from 1988 to 2019 from the Spanish Juan Carlos I Base, located in the South Shetland Islands, specifically in Livingston Island , have been used for the first time to fill this research niche. Speed series have been subjected to a robust quality control and homogenization protocol in Climatol. The results of the magnitude, sign and decadal variability of this series have been compared with the same results for the same time period for the data of ERA5 reanalysis, all of them at three time scales: annual, seasonal and monthly. For both observations and ERA5 we investigate the relationship between speed series and SAM. Conference Object Antarc* Antarctic Antarctic Peninsula Livingston Island Sea ice South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Juan Carlos I Base ENVELOPE(-60.389,-60.389,-62.663,-62.663) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands The Antarctic |
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Digital.CSIC (Spanish National Research Council) |
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description |
Trabajo presentado en EGU General Assembly, celebrada en modalidad virtual del 19 al 30 de abril de 2021. The Antarctic Peninsula is one of the most affected regions in a warming climate. Climate change not only involves rising air temperatures or changing precipitation patterns, but also wind. Over the past few decades, one of the most prominent changes in the near-Antarctic climate has been the southward shift of the westerly winds, associated with a positive trend in the Southern Annular Mode index (SAM). Some studies revealed that the poleward shift of the westerlies results in an increased in the seasonality of the coastal easterlies, concretely an increase in the difference between weak easterly winds in summer and strong easterlies in winter. The assessment and attribution of the variability of the easterly winds that encircle the coastline is crucial due to its influence e.g. (i) in the sea ice formation and export, (ii) a variation in the easterly winds can modify the Antarctic Bottom Water formation and properties, (iii) the heat transport trough the continent. Due to operational challenges of measuring weather data in the Antarctic region, there are few long-terms time series and studies dealing with wind trends and variability. In this work, wind series from 1988 to 2019 from the Spanish Juan Carlos I Base, located in the South Shetland Islands, specifically in Livingston Island , have been used for the first time to fill this research niche. Speed series have been subjected to a robust quality control and homogenization protocol in Climatol. The results of the magnitude, sign and decadal variability of this series have been compared with the same results for the same time period for the data of ERA5 reanalysis, all of them at three time scales: annual, seasonal and monthly. For both observations and ERA5 we investigate the relationship between speed series and SAM. |
format |
Conference Object |
author |
Andrés-Martín, M. Azorín-Molina, César Utrabo-Carazo, Eduardo Bedoya-Valest, Shalenys |
spellingShingle |
Andrés-Martín, M. Azorín-Molina, César Utrabo-Carazo, Eduardo Bedoya-Valest, Shalenys Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
author_facet |
Andrés-Martín, M. Azorín-Molina, César Utrabo-Carazo, Eduardo Bedoya-Valest, Shalenys |
author_sort |
Andrés-Martín, M. |
title |
Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
title_short |
Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
title_full |
Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
title_fullStr |
Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
title_full_unstemmed |
Wind speed variability over the South Shetland Islands, 1988-2019: the relationship between easterlies winds and SAM |
title_sort |
wind speed variability over the south shetland islands, 1988-2019: the relationship between easterlies winds and sam |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/266936 https://doi.org/10.5194/egusphere-egu21-8706 |
long_lat |
ENVELOPE(-60.389,-60.389,-62.663,-62.663) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Juan Carlos I Base Livingston Island South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Juan Carlos I Base Livingston Island South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Livingston Island Sea ice South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Livingston Island Sea ice South Shetland Islands |
op_relation |
Publisher's version https://doi.org/10.5194/egusphere-egu21-8706 Sí EGU General Assembly (2021) http://hdl.handle.net/10261/266936 doi:10.5194/egusphere-egu21-8706 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/egusphere-egu21-8706 |
_version_ |
1790593115434778624 |