The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean
The wealth of historical sea ice concentration (SIC) observations, coupled with their extensive spatial coverage, renders them indispensable for the reconstruction of long-term Antarctic sea ice variability. However, recent studies have pointed out the presence of significant uncertainties in certai...
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ftzenodo:oai:zenodo.org:8214462 2024-09-15T17:48:26+00:00 The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean Luo, Hao Yang, Qinghua Mazloff, Matthew Nerger, Lars Chen, Dake 2023-08-04 https://doi.org/10.5281/zenodo.8214462 eng eng Zenodo https://doi.org/10.5281/zenodo.8214461 https://doi.org/10.5281/zenodo.8214462 oai:zenodo.org:8214462 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Antarctic sea ice data assimilation model-dependent parameters info:eu-repo/semantics/other 2023 ftzenodo https://doi.org/10.5281/zenodo.821446210.5281/zenodo.8214461 2024-07-26T12:04:52Z The wealth of historical sea ice concentration (SIC) observations, coupled with their extensive spatial coverage, renders them indispensable for the reconstruction of long-term Antarctic sea ice variability. However, recent studies have pointed out the presence of significant uncertainties in certain aspects of Antarctic sea ice reanalyses obtained from assimilating SIC. Notably, while previous studies on ocean data assimilation have already demonstrated the significance of optimizing model-dependent parameters for assimilating oceanic observations, this aspect has received limited attention in current sea ice data assimilation studies. As a result, whether optimizing model-dependent parameters can enhance the effectiveness of assimilating SIC remains an open question. Thus,we address this gap by refining the model-dependent parameters of Data Assimilation System for the Southern Ocean (DASSO), including the development of a latitude-dependent localization scheme and the objective estimation of observation error variance of SIC which takes into account both measurement errors and representation errors. Here, the monthly anomalies in Antarctic sea ice extent and volume (1980 -2018) are uploaded which is produced bythe optimized Data Assimilation System for the Southern Ocean (DASSO) with assimilating SIC. Besides, a 13-month moving mean is applied to monthly anomalies to focus on the low-frequency variability of Antarctic sea ice. Other/Unknown Material Antarc* Antarctic Sea ice Southern Ocean Zenodo |
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English |
topic |
Antarctic sea ice data assimilation model-dependent parameters |
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Antarctic sea ice data assimilation model-dependent parameters Luo, Hao Yang, Qinghua Mazloff, Matthew Nerger, Lars Chen, Dake The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
topic_facet |
Antarctic sea ice data assimilation model-dependent parameters |
description |
The wealth of historical sea ice concentration (SIC) observations, coupled with their extensive spatial coverage, renders them indispensable for the reconstruction of long-term Antarctic sea ice variability. However, recent studies have pointed out the presence of significant uncertainties in certain aspects of Antarctic sea ice reanalyses obtained from assimilating SIC. Notably, while previous studies on ocean data assimilation have already demonstrated the significance of optimizing model-dependent parameters for assimilating oceanic observations, this aspect has received limited attention in current sea ice data assimilation studies. As a result, whether optimizing model-dependent parameters can enhance the effectiveness of assimilating SIC remains an open question. Thus,we address this gap by refining the model-dependent parameters of Data Assimilation System for the Southern Ocean (DASSO), including the development of a latitude-dependent localization scheme and the objective estimation of observation error variance of SIC which takes into account both measurement errors and representation errors. Here, the monthly anomalies in Antarctic sea ice extent and volume (1980 -2018) are uploaded which is produced bythe optimized Data Assimilation System for the Southern Ocean (DASSO) with assimilating SIC. Besides, a 13-month moving mean is applied to monthly anomalies to focus on the low-frequency variability of Antarctic sea ice. |
format |
Other/Unknown Material |
author |
Luo, Hao Yang, Qinghua Mazloff, Matthew Nerger, Lars Chen, Dake |
author_facet |
Luo, Hao Yang, Qinghua Mazloff, Matthew Nerger, Lars Chen, Dake |
author_sort |
Luo, Hao |
title |
The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
title_short |
The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
title_full |
The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
title_fullStr |
The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
title_full_unstemmed |
The Antarctic sea ice reconstruction (CMST-South) based on the optimized Data Assimilation System for the Southern Ocean |
title_sort |
antarctic sea ice reconstruction (cmst-south) based on the optimized data assimilation system for the southern ocean |
publisher |
Zenodo |
publishDate |
2023 |
url |
https://doi.org/10.5281/zenodo.8214462 |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
https://doi.org/10.5281/zenodo.8214461 https://doi.org/10.5281/zenodo.8214462 oai:zenodo.org:8214462 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.821446210.5281/zenodo.8214461 |
_version_ |
1810289665080557568 |