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 20 th century. This study describes the exercise of comparing available datasets to force Mediterranean Sea an...

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Published in:Annals of Geophysics
Main Authors: Cherchi, Annalisa, Ratna, Satyaban Bishoyi, Masina, Simona, Storto, Andrea, Yang, Chunxue, Fratianni, Claudia, Simoncelli, Simona, Pinardi, Nadia
Format: Article in Journal/Newspaper
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/11585/681914
https://doi.org/10.4401/ag-7793
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966
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spelling ftunibolognairis:oai:cris.unibo.it:11585/681914 2024-02-11T10:08:33+01:00 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 Cherchi, Annalisa Ratna, Satyaban Bishoyi Masina, Simona Storto, Andrea Yang, Chunxue Fratianni, Claudia Simoncelli, Simona Pinardi, Nadia 2018 STAMPA http://hdl.handle.net/11585/681914 https://doi.org/10.4401/ag-7793 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000456271200003 volume:61 issue:5 firstpage:1 lastpage:24 numberofpages:24 journal:ANNALS OF GEOPHYSICS info:eu-repo/grantAgreement/EC/H2020/633085 http://hdl.handle.net/11585/681914 doi:10.4401/ag-7793 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85060555061 https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966 info:eu-repo/semantics/openAccess AMIP experiment Atmospheric forcing Global ocean Mediterranean sea Ocean reanalyse Geophysics info:eu-repo/semantics/article 2018 ftunibolognairis https://doi.org/10.4401/ag-7793 2024-01-17T17:51:39Z 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 20 th 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 concentration 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 reanalyses. 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 representing 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 alternative 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 IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Annals of Geophysics 61 5
institution Open Polar
collection IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
op_collection_id ftunibolognairis
language English
topic AMIP experiment
Atmospheric forcing
Global ocean
Mediterranean sea
Ocean reanalyse
Geophysics
spellingShingle AMIP experiment
Atmospheric forcing
Global ocean
Mediterranean sea
Ocean reanalyse
Geophysics
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
topic_facet AMIP experiment
Atmospheric forcing
Global ocean
Mediterranean sea
Ocean reanalyse
Geophysics
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 20 th 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 concentration 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 reanalyses. 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 representing 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 alternative 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.
author2 Cherchi, Annalisa
Ratna, Satyaban Bishoyi
Masina, Simona
Storto, Andrea
Yang, Chunxue
Fratianni, Claudia
Simoncelli, Simona
Pinardi, Nadia
format Article in Journal/Newspaper
author Cherchi, Annalisa
Ratna, Satyaban Bishoyi
Masina, Simona
Storto, Andrea
Yang, Chunxue
Fratianni, Claudia
Simoncelli, Simona
Pinardi, Nadia
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
publishDate 2018
url http://hdl.handle.net/11585/681914
https://doi.org/10.4401/ag-7793
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966
genre Sea ice
genre_facet Sea ice
op_relation info:eu-repo/semantics/altIdentifier/wos/WOS:000456271200003
volume:61
issue:5
firstpage:1
lastpage:24
numberofpages:24
journal:ANNALS OF GEOPHYSICS
info:eu-repo/grantAgreement/EC/H2020/633085
http://hdl.handle.net/11585/681914
doi:10.4401/ag-7793
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85060555061
https://www.annalsofgeophysics.eu/index.php/annals/article/view/7793/6966
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.4401/ag-7793
container_title Annals of Geophysics
container_volume 61
container_issue 5
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