Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model
We compare strongly coupled data assimilation (SCDA) and weakly coupled data assimilation (WCDA) by analyzing the assimilation effect on the estimation of the ocean and the atmosphere variables. The AWI climate model (AWI-CM-1.1) is coupled with the parallel data assimilation framework (PDAF). Only...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/55317/ https://epic.awi.de/id/eprint/55317/1/Tang_etal_GRL48_e2021GL094941_2021.pdf https://hdl.handle.net/10013/epic.22ee591a-5333-43b8-8384-e5faed8964fd |
id |
ftawi:oai:epic.awi.de:55317 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:55317 2024-09-09T19:24:51+00:00 Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model Tang, Qi Mu, Longjiang Goessling, Helge Semmler, Tido Nerger, Lars 2021 application/pdf https://epic.awi.de/id/eprint/55317/ https://epic.awi.de/id/eprint/55317/1/Tang_etal_GRL48_e2021GL094941_2021.pdf https://hdl.handle.net/10013/epic.22ee591a-5333-43b8-8384-e5faed8964fd unknown https://epic.awi.de/id/eprint/55317/1/Tang_etal_GRL48_e2021GL094941_2021.pdf Tang, Q. orcid:0000-0002-2109-7935 , Mu, L. orcid:0000-0001-5668-8025 , Goessling, H. orcid:0000-0001-9018-1383 , Semmler, T. orcid:0000-0002-2254-4901 and Nerger, L. orcid:0000-0002-1908-1010 (2021) Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model , Geophysical Research Letters, 48 , e2021GL094941 . doi:10.1029/2021GL094941 <https://doi.org/10.1029/2021GL094941> , hdl:10013/epic.22ee591a-5333-43b8-8384-e5faed8964fd EPIC3Geophysical Research Letters, 48, pp. e2021GL094941 Article isiRev 2021 ftawi https://doi.org/10.1029/2021GL094941 2024-06-24T04:27:29Z We compare strongly coupled data assimilation (SCDA) and weakly coupled data assimilation (WCDA) by analyzing the assimilation effect on the estimation of the ocean and the atmosphere variables. The AWI climate model (AWI-CM-1.1) is coupled with the parallel data assimilation framework (PDAF). Only satellite sea surface temperature data are assimilated. For WCDA, only the ocean variables are directly updated by the assimilation. For SCDA, both the ocean and the atmosphere variables are directly updated by the assimilation. Both WCDA and SCDA improve ocean state and yield similar errors. In the atmosphere, WCDA gives slightly smaller errors for the near-surface temperature and wind velocity than SCDA. In the free atmosphere, SCDA yields smaller errors for the temperature, wind velocity, and specific humidity than WCDA in the Arctic region, while in the tropical region, the errors are generally larger. Article in Journal/Newspaper Arctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Geophysical Research Letters 48 24 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We compare strongly coupled data assimilation (SCDA) and weakly coupled data assimilation (WCDA) by analyzing the assimilation effect on the estimation of the ocean and the atmosphere variables. The AWI climate model (AWI-CM-1.1) is coupled with the parallel data assimilation framework (PDAF). Only satellite sea surface temperature data are assimilated. For WCDA, only the ocean variables are directly updated by the assimilation. For SCDA, both the ocean and the atmosphere variables are directly updated by the assimilation. Both WCDA and SCDA improve ocean state and yield similar errors. In the atmosphere, WCDA gives slightly smaller errors for the near-surface temperature and wind velocity than SCDA. In the free atmosphere, SCDA yields smaller errors for the temperature, wind velocity, and specific humidity than WCDA in the Arctic region, while in the tropical region, the errors are generally larger. |
format |
Article in Journal/Newspaper |
author |
Tang, Qi Mu, Longjiang Goessling, Helge Semmler, Tido Nerger, Lars |
spellingShingle |
Tang, Qi Mu, Longjiang Goessling, Helge Semmler, Tido Nerger, Lars Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
author_facet |
Tang, Qi Mu, Longjiang Goessling, Helge Semmler, Tido Nerger, Lars |
author_sort |
Tang, Qi |
title |
Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
title_short |
Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
title_full |
Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
title_fullStr |
Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
title_full_unstemmed |
Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model |
title_sort |
strongly coupled data assimilation of ocean observations into an ocean-atmosphere model |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/55317/ https://epic.awi.de/id/eprint/55317/1/Tang_etal_GRL48_e2021GL094941_2021.pdf https://hdl.handle.net/10013/epic.22ee591a-5333-43b8-8384-e5faed8964fd |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
EPIC3Geophysical Research Letters, 48, pp. e2021GL094941 |
op_relation |
https://epic.awi.de/id/eprint/55317/1/Tang_etal_GRL48_e2021GL094941_2021.pdf Tang, Q. orcid:0000-0002-2109-7935 , Mu, L. orcid:0000-0001-5668-8025 , Goessling, H. orcid:0000-0001-9018-1383 , Semmler, T. orcid:0000-0002-2254-4901 and Nerger, L. orcid:0000-0002-1908-1010 (2021) Strongly Coupled Data Assimilation of Ocean Observations Into an Ocean-Atmosphere Model , Geophysical Research Letters, 48 , e2021GL094941 . doi:10.1029/2021GL094941 <https://doi.org/10.1029/2021GL094941> , hdl:10013/epic.22ee591a-5333-43b8-8384-e5faed8964fd |
op_doi |
https://doi.org/10.1029/2021GL094941 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
24 |
_version_ |
1809894690217000960 |