Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5
The satellite-derived sea ice concentration (SIC) and thickness (SIT) observation over the Arctic region are assimilated by implementing the Ensemble Optimal Interpolation (EnOI) into the Community Ice CodE version 5.1.2 (CICE5) model. The assimilated observations are derived from Special Sensor Mic...
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2022
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Online Access: | https://doi.org/10.3389/fclim.2022.797733 https://doaj.org/article/36ab24b2e85343b6a2d99550e731c1b6 |
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ftdoajarticles:oai:doaj.org/article:36ab24b2e85343b6a2d99550e731c1b6 2023-05-15T14:51:16+02:00 Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 Jeong-Gil Lee Yoo-Geun Ham 2022-03-01T00:00:00Z https://doi.org/10.3389/fclim.2022.797733 https://doaj.org/article/36ab24b2e85343b6a2d99550e731c1b6 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fclim.2022.797733/full https://doaj.org/toc/2624-9553 2624-9553 doi:10.3389/fclim.2022.797733 https://doaj.org/article/36ab24b2e85343b6a2d99550e731c1b6 Frontiers in Climate, Vol 4 (2022) Arctic sea ice data assimilation satellite observation EnOI CICE5 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.3389/fclim.2022.797733 2022-12-31T16:07:04Z The satellite-derived sea ice concentration (SIC) and thickness (SIT) observation over the Arctic region are assimilated by implementing the Ensemble Optimal Interpolation (EnOI) into the Community Ice CodE version 5.1.2 (CICE5) model. The assimilated observations are derived from Special Sensor Microwave Imager/Sounder (SSMIS) for the SIC, European Space Agency's (ESA) Soil Moisture and Ocean Salinity mission (SMOS) for the SIT of the thin ice, and ESA's CryoSat-2 satellite for the SIT of the thick ice. The SIC, and SIT observations are assimilated during 2000–2019, and 2011–2019, respectively. The quality of the reanalysis is evaluated by comparing with observation and modeled data. Three data assimilation experiments are conducted: noDA without data assimilation, Ver1 with SIC assimilation, and Ver2 with SIC and SIT assimilation. The climatological bias of the SIC in noDA was reduced in Ver1 by 29% in marginal ice zones during boreal winter, and 82% in pan-Arctic ocean during boreal summer. The quality of simulating the interannual variation of sea ice extent (SIE) is improved in all months particularly during boreal summer. The root-mean-square errors (RMSEs) of SIE anomaly in August are significantly reduced compared to noDA. However, the interannual variations of SIT is unrealistic in Ver1 which requires the additional assimilation of the SIT observation. The climatological bias of SIT over the Arctic was further reduced in Ver2 by 28% during boreal winter compared to that in Ver1. The interannual variability of SIT anomalies is realistically simulated in Ver2 by reducing the RMSEs of SIT anomalies by 33% in February, and 28% in August by compared to that in Ver1. The dominant interannual variation extracted by empirical orthogonal function (EOF) of SIT anomalies in Ver2 is better simulated than Ver1. The additional assimilation of SIT improves not only SIT, but also SIC. The climatological bias of SIE and the errors in leading EOF of SIC anomalies in Ver2 is further reduced compared to those in Ver1 ... Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Frontiers in Climate 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic sea ice data assimilation satellite observation EnOI CICE5 Environmental sciences GE1-350 |
spellingShingle |
Arctic sea ice data assimilation satellite observation EnOI CICE5 Environmental sciences GE1-350 Jeong-Gil Lee Yoo-Geun Ham Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
topic_facet |
Arctic sea ice data assimilation satellite observation EnOI CICE5 Environmental sciences GE1-350 |
description |
The satellite-derived sea ice concentration (SIC) and thickness (SIT) observation over the Arctic region are assimilated by implementing the Ensemble Optimal Interpolation (EnOI) into the Community Ice CodE version 5.1.2 (CICE5) model. The assimilated observations are derived from Special Sensor Microwave Imager/Sounder (SSMIS) for the SIC, European Space Agency's (ESA) Soil Moisture and Ocean Salinity mission (SMOS) for the SIT of the thin ice, and ESA's CryoSat-2 satellite for the SIT of the thick ice. The SIC, and SIT observations are assimilated during 2000–2019, and 2011–2019, respectively. The quality of the reanalysis is evaluated by comparing with observation and modeled data. Three data assimilation experiments are conducted: noDA without data assimilation, Ver1 with SIC assimilation, and Ver2 with SIC and SIT assimilation. The climatological bias of the SIC in noDA was reduced in Ver1 by 29% in marginal ice zones during boreal winter, and 82% in pan-Arctic ocean during boreal summer. The quality of simulating the interannual variation of sea ice extent (SIE) is improved in all months particularly during boreal summer. The root-mean-square errors (RMSEs) of SIE anomaly in August are significantly reduced compared to noDA. However, the interannual variations of SIT is unrealistic in Ver1 which requires the additional assimilation of the SIT observation. The climatological bias of SIT over the Arctic was further reduced in Ver2 by 28% during boreal winter compared to that in Ver1. The interannual variability of SIT anomalies is realistically simulated in Ver2 by reducing the RMSEs of SIT anomalies by 33% in February, and 28% in August by compared to that in Ver1. The dominant interannual variation extracted by empirical orthogonal function (EOF) of SIT anomalies in Ver2 is better simulated than Ver1. The additional assimilation of SIT improves not only SIT, but also SIC. The climatological bias of SIE and the errors in leading EOF of SIC anomalies in Ver2 is further reduced compared to those in Ver1 ... |
format |
Article in Journal/Newspaper |
author |
Jeong-Gil Lee Yoo-Geun Ham |
author_facet |
Jeong-Gil Lee Yoo-Geun Ham |
author_sort |
Jeong-Gil Lee |
title |
Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
title_short |
Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
title_full |
Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
title_fullStr |
Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
title_full_unstemmed |
Satellite-Based Data Assimilation System for the Initialization of Arctic Sea Ice Concentration and Thickness Using CICE5 |
title_sort |
satellite-based data assimilation system for the initialization of arctic sea ice concentration and thickness using cice5 |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fclim.2022.797733 https://doaj.org/article/36ab24b2e85343b6a2d99550e731c1b6 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Frontiers in Climate, Vol 4 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fclim.2022.797733/full https://doaj.org/toc/2624-9553 2624-9553 doi:10.3389/fclim.2022.797733 https://doaj.org/article/36ab24b2e85343b6a2d99550e731c1b6 |
op_doi |
https://doi.org/10.3389/fclim.2022.797733 |
container_title |
Frontiers in Climate |
container_volume |
4 |
_version_ |
1766322311535788032 |