Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts
The representation of the CFSv2 ocean-atmosphere ensemble hindcasts is investigated during Dec-Jan-Feb (DJF) and Jun-Jul-Aug (JJA) from 1983 to 2010. The skill anomaly correlations showed that in some continents the forecasts do not have dependency with changes in the initial conditions. Also, in bo...
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fthindawi:oai:hindawi.com:10.1155/2014/695067 2023-05-15T14:01:25+02:00 Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts Gyrlene A. M. Silva Lívia M. M. Dutra Rosmeri P. da Rocha Tércio Ambrizzi Érico Leiva 2014 https://doi.org/10.1155/2014/695067 en eng Advances in Meteorology https://doi.org/10.1155/2014/695067 Copyright © 2014 Gyrlene A. M. Silva et al. Research Article 2014 fthindawi https://doi.org/10.1155/2014/695067 2019-05-25T22:43:57Z The representation of the CFSv2 ocean-atmosphere ensemble hindcasts is investigated during Dec-Jan-Feb (DJF) and Jun-Jul-Aug (JJA) from 1983 to 2010. The skill anomaly correlations showed that in some continents the forecasts do not have dependency with changes in the initial conditions. Also, in both seasons the model has a higher skill at the 0-month lead time with the largest spatial biases occurring over the North America, South America, and Oceania. Over the continents the largest biases in the nonlinearity of El Niño minus La Niña events are found over the eastern South Africa, part of Oceania, and central-southeastern parts of South America. During DJF the main biases are related to double-ITCZ, strengthening of SPCZ, and deepening of the Aleutian and Icelandic low pressures. The simulation of a warmer SST on the eastern of most austral oceans, the strengthening (weakening) of the Subtropical (Polar) Jet over the Southern Hemisphere, and the weakening of the zonal circulation near the Antarctic continent are also found in both seasons. Over the central-eastern Equatorial Pacific a cooler bias in SST is found during JJA. These biases are interpreted by analyses of the simulated global mean-state and their impact on the main patterns of variability. Article in Journal/Newspaper Antarc* Antarctic Hindawi Publishing Corporation Antarctic Austral Pacific The Antarctic Advances in Meteorology 2014 1 21 |
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Open Polar |
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Hindawi Publishing Corporation |
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fthindawi |
language |
English |
description |
The representation of the CFSv2 ocean-atmosphere ensemble hindcasts is investigated during Dec-Jan-Feb (DJF) and Jun-Jul-Aug (JJA) from 1983 to 2010. The skill anomaly correlations showed that in some continents the forecasts do not have dependency with changes in the initial conditions. Also, in both seasons the model has a higher skill at the 0-month lead time with the largest spatial biases occurring over the North America, South America, and Oceania. Over the continents the largest biases in the nonlinearity of El Niño minus La Niña events are found over the eastern South Africa, part of Oceania, and central-southeastern parts of South America. During DJF the main biases are related to double-ITCZ, strengthening of SPCZ, and deepening of the Aleutian and Icelandic low pressures. The simulation of a warmer SST on the eastern of most austral oceans, the strengthening (weakening) of the Subtropical (Polar) Jet over the Southern Hemisphere, and the weakening of the zonal circulation near the Antarctic continent are also found in both seasons. Over the central-eastern Equatorial Pacific a cooler bias in SST is found during JJA. These biases are interpreted by analyses of the simulated global mean-state and their impact on the main patterns of variability. |
format |
Article in Journal/Newspaper |
author |
Gyrlene A. M. Silva Lívia M. M. Dutra Rosmeri P. da Rocha Tércio Ambrizzi Érico Leiva |
spellingShingle |
Gyrlene A. M. Silva Lívia M. M. Dutra Rosmeri P. da Rocha Tércio Ambrizzi Érico Leiva Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
author_facet |
Gyrlene A. M. Silva Lívia M. M. Dutra Rosmeri P. da Rocha Tércio Ambrizzi Érico Leiva |
author_sort |
Gyrlene A. M. Silva |
title |
Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
title_short |
Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
title_full |
Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
title_fullStr |
Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
title_full_unstemmed |
Preliminary Analysis on the Global Features of the NCEP CFSv2 Seasonal Hindcasts |
title_sort |
preliminary analysis on the global features of the ncep cfsv2 seasonal hindcasts |
publisher |
Advances in Meteorology |
publishDate |
2014 |
url |
https://doi.org/10.1155/2014/695067 |
geographic |
Antarctic Austral Pacific The Antarctic |
geographic_facet |
Antarctic Austral Pacific The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://doi.org/10.1155/2014/695067 |
op_rights |
Copyright © 2014 Gyrlene A. M. Silva et al. |
op_doi |
https://doi.org/10.1155/2014/695067 |
container_title |
Advances in Meteorology |
container_volume |
2014 |
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1 |
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21 |
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1766271229119954944 |