Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results
We describe the development of a coupled regional atmosphere-ocean model (RegCM4-ROMS) and its implementation over the Caspian Sea basin. The coupled model is run for the period 1999–2008 (after a spin up of 4 yr) and it is compared to corresponding stand alone model simulations and a simulation in...
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ftdoajarticles:oai:doaj.org/article:82e57b105cf34523a85777a76e91efb9 2023-05-15T18:18:05+02:00 Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results U. U. Turuncoglu G. Giuliani N. Elguindi F. Giorgi 2013-03-01T00:00:00Z https://doi.org/10.5194/gmd-6-283-2013 https://doaj.org/article/82e57b105cf34523a85777a76e91efb9 EN eng Copernicus Publications http://www.geosci-model-dev.net/6/283/2013/gmd-6-283-2013.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-6-283-2013 1991-959X 1991-9603 https://doaj.org/article/82e57b105cf34523a85777a76e91efb9 Geoscientific Model Development, Vol 6, Iss 2, Pp 283-299 (2013) Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/gmd-6-283-2013 2022-12-30T21:47:45Z We describe the development of a coupled regional atmosphere-ocean model (RegCM4-ROMS) and its implementation over the Caspian Sea basin. The coupled model is run for the period 1999–2008 (after a spin up of 4 yr) and it is compared to corresponding stand alone model simulations and a simulation in which a distributed 1d lake model is run for the Caspian Sea. All model versions show a good performance in reproducing the climatology of the Caspian Sea basin, with relatively minor differences across them. The coupled ROMS produces realistic, although somewhat overestimated, Caspian Sea Surface Temperature (SST), with a considerable improvement compared to the use of the simpler coupled lake model. Simulated near surface salinity and sea currents are also realistic, although the upwelling over the eastern coastal regions is underestimated. The sea ice extent over the shallow northern shelf of the Caspian Sea and its seasonal evolution are well reproduced, however, a significant negative bias in sea-ice fraction exists due to the relatively poor representation of the bathymetry. ROMS also calculates the Caspian Sea Level (CSL), showing that for the present experiment excessive evaporation over the lake area leads to a drift in estimated CSL. Despite this problem, which requires further analysis due to many uncertainties in the estimation of CSL, overall the coupled RegCM4-ROMS system shows encouraging results in reproducing both the climatology of the region and the basic characteristics of the Caspian Sea. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles Geoscientific Model Development 6 2 283 299 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 U. U. Turuncoglu G. Giuliani N. Elguindi F. Giorgi Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
topic_facet |
Geology QE1-996.5 |
description |
We describe the development of a coupled regional atmosphere-ocean model (RegCM4-ROMS) and its implementation over the Caspian Sea basin. The coupled model is run for the period 1999–2008 (after a spin up of 4 yr) and it is compared to corresponding stand alone model simulations and a simulation in which a distributed 1d lake model is run for the Caspian Sea. All model versions show a good performance in reproducing the climatology of the Caspian Sea basin, with relatively minor differences across them. The coupled ROMS produces realistic, although somewhat overestimated, Caspian Sea Surface Temperature (SST), with a considerable improvement compared to the use of the simpler coupled lake model. Simulated near surface salinity and sea currents are also realistic, although the upwelling over the eastern coastal regions is underestimated. The sea ice extent over the shallow northern shelf of the Caspian Sea and its seasonal evolution are well reproduced, however, a significant negative bias in sea-ice fraction exists due to the relatively poor representation of the bathymetry. ROMS also calculates the Caspian Sea Level (CSL), showing that for the present experiment excessive evaporation over the lake area leads to a drift in estimated CSL. Despite this problem, which requires further analysis due to many uncertainties in the estimation of CSL, overall the coupled RegCM4-ROMS system shows encouraging results in reproducing both the climatology of the region and the basic characteristics of the Caspian Sea. |
format |
Article in Journal/Newspaper |
author |
U. U. Turuncoglu G. Giuliani N. Elguindi F. Giorgi |
author_facet |
U. U. Turuncoglu G. Giuliani N. Elguindi F. Giorgi |
author_sort |
U. U. Turuncoglu |
title |
Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
title_short |
Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
title_full |
Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
title_fullStr |
Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
title_full_unstemmed |
Modelling the Caspian Sea and its catchment area using a coupled regional atmosphere-ocean model (RegCM4-ROMS): model design and preliminary results |
title_sort |
modelling the caspian sea and its catchment area using a coupled regional atmosphere-ocean model (regcm4-roms): model design and preliminary results |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/gmd-6-283-2013 https://doaj.org/article/82e57b105cf34523a85777a76e91efb9 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Geoscientific Model Development, Vol 6, Iss 2, Pp 283-299 (2013) |
op_relation |
http://www.geosci-model-dev.net/6/283/2013/gmd-6-283-2013.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-6-283-2013 1991-959X 1991-9603 https://doaj.org/article/82e57b105cf34523a85777a76e91efb9 |
op_doi |
https://doi.org/10.5194/gmd-6-283-2013 |
container_title |
Geoscientific Model Development |
container_volume |
6 |
container_issue |
2 |
container_start_page |
283 |
op_container_end_page |
299 |
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