DART/CAM: An ensemble data assimilation system for CESM atmospheric models
The Community Atmosphere Model (CAM) has been interfaced to the Data Assimilation Research Testbed (DART), a community facility for ensemble data assimilation. This provides a large set of data assimilation tools for climate model research and development. Aspects of the interface to the Community E...
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American Meteorological Society
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ftncar:oai:drupal-site.org:articles_12245 2024-06-23T07:50:38+00:00 DART/CAM: An ensemble data assimilation system for CESM atmospheric models Raeder, Kevin (author) Anderson, Jeffrey (author) Collins, Nancy (author) Hoar, Timothy (author) Kay, Jennifer (author) Lauritzen, Peter (author) Pincus, Robert (author) 2012-09-15 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-238 https://doi.org/10.1175/JCLI-D-11-00395.1 en eng American Meteorological Society Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-238 doi:10.1175/JCLI-D-11-00395.1 ark:/85065/d7cv4jh1 Copyright 2012 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Kalman filters Model evaluation/performance Model comparison Data assimilation Climate models Text article 2012 ftncar https://doi.org/10.1175/JCLI-D-11-00395.1 2024-05-27T14:15:41Z The Community Atmosphere Model (CAM) has been interfaced to the Data Assimilation Research Testbed (DART), a community facility for ensemble data assimilation. This provides a large set of data assimilation tools for climate model research and development. Aspects of the interface to the Community Earth System Model (CESM) software are discussed and a variety of applications are illustrated, ranging from model development to the production of long series of analyses. CAM output is compared directly to real observations from platforms ranging from radiosondes to global positioning system satellites. Such comparisons use the temporally and spatially heterogeneous analysis error estimates available from the ensemble to provide very specific forecast quality evaluations. The ability to start forecasts from analyses, which were generated by CAM on its native grid and have no foreign model bias, contributed to the detection of a code error involving Arctic sea ice and cloud cover. The potential of parameter estimation is discussed. A CAM ensemble reanalysis has been generated for more than 15 yr. Atmospheric forcings from the reanalysis were required as input to generate an ocean ensemble reanalysis that provided initial conditions for decadal prediction experiments. The software enables rapid experimentation with differing sets of observations and state variables, and the comparison of different models against identical real observations, as illustrated by a comparison of forecasts initialized by interpolated ECMWF analyses and by DART/CAM analyses. Article in Journal/Newspaper Arctic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Journal of Climate 25 18 6304 6317 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Kalman filters Model evaluation/performance Model comparison Data assimilation Climate models |
spellingShingle |
Kalman filters Model evaluation/performance Model comparison Data assimilation Climate models DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
topic_facet |
Kalman filters Model evaluation/performance Model comparison Data assimilation Climate models |
description |
The Community Atmosphere Model (CAM) has been interfaced to the Data Assimilation Research Testbed (DART), a community facility for ensemble data assimilation. This provides a large set of data assimilation tools for climate model research and development. Aspects of the interface to the Community Earth System Model (CESM) software are discussed and a variety of applications are illustrated, ranging from model development to the production of long series of analyses. CAM output is compared directly to real observations from platforms ranging from radiosondes to global positioning system satellites. Such comparisons use the temporally and spatially heterogeneous analysis error estimates available from the ensemble to provide very specific forecast quality evaluations. The ability to start forecasts from analyses, which were generated by CAM on its native grid and have no foreign model bias, contributed to the detection of a code error involving Arctic sea ice and cloud cover. The potential of parameter estimation is discussed. A CAM ensemble reanalysis has been generated for more than 15 yr. Atmospheric forcings from the reanalysis were required as input to generate an ocean ensemble reanalysis that provided initial conditions for decadal prediction experiments. The software enables rapid experimentation with differing sets of observations and state variables, and the comparison of different models against identical real observations, as illustrated by a comparison of forecasts initialized by interpolated ECMWF analyses and by DART/CAM analyses. |
author2 |
Raeder, Kevin (author) Anderson, Jeffrey (author) Collins, Nancy (author) Hoar, Timothy (author) Kay, Jennifer (author) Lauritzen, Peter (author) Pincus, Robert (author) |
format |
Article in Journal/Newspaper |
title |
DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
title_short |
DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
title_full |
DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
title_fullStr |
DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
title_full_unstemmed |
DART/CAM: An ensemble data assimilation system for CESM atmospheric models |
title_sort |
dart/cam: an ensemble data assimilation system for cesm atmospheric models |
publisher |
American Meteorological Society |
publishDate |
2012 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-238 https://doi.org/10.1175/JCLI-D-11-00395.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-238 doi:10.1175/JCLI-D-11-00395.1 ark:/85065/d7cv4jh1 |
op_rights |
Copyright 2012 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JCLI-D-11-00395.1 |
container_title |
Journal of Climate |
container_volume |
25 |
container_issue |
18 |
container_start_page |
6304 |
op_container_end_page |
6317 |
_version_ |
1802641546547298304 |