EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES
Oceanic reanalyses are powerful products to reconstruct the historical 3D-state of the ocean and related circulation. At present a challenge is to have oceanic reanalyses covering the whole 20th century. This study describes the exercise of comparing available datasets to force Mediterranean Sea and...
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Istituto Nazionale di Geofisica e Vulcanologia, INGV
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Online Access: | https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793 https://doi.org/10.4401/ag-7793 |
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ftjaog:oai:ojs.annalsofgeophysics.eu:article/7793 2023-05-15T18:18:52+02:00 EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES Cherchi, Annalisa Ratna, Satyaban Bishoyi Masina, Simona Storto, Andrea Yang, Chunxue Fratianni, Claudia Simoncelli, Simona Pinardi, Nadia 2018-12-12 application/pdf https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793 https://doi.org/10.4401/ag-7793 eng eng Istituto Nazionale di Geofisica e Vulcanologia, INGV https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793 doi:10.4401/ag-7793 Copyright (c) 2018 Annals of Geophysics Annals of Geophysics; V. 61 N. 5 (2018); OC559 Annals of Geophysics; Vol. 61 No. 5 (2018); OC559 2037-416X 1593-5213 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftjaog https://doi.org/10.4401/ag-7793 2022-03-27T06:38:42Z Oceanic reanalyses are powerful products to reconstruct the historical 3D-state of the ocean and related circulation. At present a challenge is to have oceanic reanalyses covering the whole 20th century. This study describes the exercise of comparing available datasets to force Mediterranean Sea and global oceanic reanalyses from 1901 to present. In particular, we compared available atmospheric reanalyses with a set of experiments performed with an atmospheric general circulation model where sea surface temperature (SST) and sea-ice concen- tration are prescribed. These types of experiments have the advantage of covering long time records, at least for the period for which global SST is available, and they can be performed at relatively high horizontal resolutions, a very important requisite for regional oceanic re- analyses. However, they are limited by the intrinsic model biases in representing the mean atmospheric state and its variability. In this study, we show that, within some limits, the atmospheric model performance in representing the basic variables needed for the bulk-formulae to force oceanic data assimilation systems can be comparable to the differences among available atmospheric reanalyses. In the case of the Mediterranean Sea the high horizontal resolution of the set of SST-prescribed experiments combined with their good performance in rep- resenting the surface winds in the area made them the most appropriate atmospheric forcing. On the other hand, in the case of the global ocean, atmospheric reanalyses have been proven to be still preferable due to the better representation of spatial and temporal variability of surface winds and radiative fluxes. Because of their intrinsic limitations AMIP experiments cannot provide atmospheric fields alterna- tive to atmospheric reanalyses. Nevertheless, here we show how in the specific case of the Mediterranean Sea, they can be of use, if not preferable, to available atmospheric reanalyses. Article in Journal/Newspaper Sea ice Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) Tive ENVELOPE(12.480,12.480,65.107,65.107) Annals of Geophysics 61 5 |
institution |
Open Polar |
collection |
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftjaog |
language |
English |
description |
Oceanic reanalyses are powerful products to reconstruct the historical 3D-state of the ocean and related circulation. At present a challenge is to have oceanic reanalyses covering the whole 20th century. This study describes the exercise of comparing available datasets to force Mediterranean Sea and global oceanic reanalyses from 1901 to present. In particular, we compared available atmospheric reanalyses with a set of experiments performed with an atmospheric general circulation model where sea surface temperature (SST) and sea-ice concen- tration are prescribed. These types of experiments have the advantage of covering long time records, at least for the period for which global SST is available, and they can be performed at relatively high horizontal resolutions, a very important requisite for regional oceanic re- analyses. However, they are limited by the intrinsic model biases in representing the mean atmospheric state and its variability. In this study, we show that, within some limits, the atmospheric model performance in representing the basic variables needed for the bulk-formulae to force oceanic data assimilation systems can be comparable to the differences among available atmospheric reanalyses. In the case of the Mediterranean Sea the high horizontal resolution of the set of SST-prescribed experiments combined with their good performance in rep- resenting the surface winds in the area made them the most appropriate atmospheric forcing. On the other hand, in the case of the global ocean, atmospheric reanalyses have been proven to be still preferable due to the better representation of spatial and temporal variability of surface winds and radiative fluxes. Because of their intrinsic limitations AMIP experiments cannot provide atmospheric fields alterna- tive to atmospheric reanalyses. Nevertheless, here we show how in the specific case of the Mediterranean Sea, they can be of use, if not preferable, to available atmospheric reanalyses. |
format |
Article in Journal/Newspaper |
author |
Cherchi, Annalisa Ratna, Satyaban Bishoyi Masina, Simona Storto, Andrea Yang, Chunxue Fratianni, Claudia Simoncelli, Simona Pinardi, Nadia |
spellingShingle |
Cherchi, Annalisa Ratna, Satyaban Bishoyi Masina, Simona Storto, Andrea Yang, Chunxue Fratianni, Claudia Simoncelli, Simona Pinardi, Nadia EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
author_facet |
Cherchi, Annalisa Ratna, Satyaban Bishoyi Masina, Simona Storto, Andrea Yang, Chunxue Fratianni, Claudia Simoncelli, Simona Pinardi, Nadia |
author_sort |
Cherchi, Annalisa |
title |
EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
title_short |
EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
title_full |
EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
title_fullStr |
EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
title_full_unstemmed |
EVALUATION OF AMIP-TYPE ATMOSPHERIC FIELDS AS FORCING FOR MEDITERRANEAN SEA AND GLOBAL OCEAN REANALYSES |
title_sort |
evaluation of amip-type atmospheric fields as forcing for mediterranean sea and global ocean reanalyses |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia, INGV |
publishDate |
2018 |
url |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793 https://doi.org/10.4401/ag-7793 |
long_lat |
ENVELOPE(12.480,12.480,65.107,65.107) |
geographic |
Tive |
geographic_facet |
Tive |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Annals of Geophysics; V. 61 N. 5 (2018); OC559 Annals of Geophysics; Vol. 61 No. 5 (2018); OC559 2037-416X 1593-5213 |
op_relation |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793 doi:10.4401/ag-7793 |
op_rights |
Copyright (c) 2018 Annals of Geophysics |
op_doi |
https://doi.org/10.4401/ag-7793 |
container_title |
Annals of Geophysics |
container_volume |
61 |
container_issue |
5 |
_version_ |
1766195611998093312 |