An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations
<p>Antarctic sea ice is an important component of the Earth system. However, its role in the Earth system is still unclear due to limited Antarctic sea-ice thickness (SIT) data. A reliable sea-ice reanalysis can be useful to study Antarctic SIT and its role in the Earth system. Among various A...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2022-05-01
|
| Series: | The Cryosphere |
| Online Access: | https://tc.copernicus.org/articles/16/1807/2022/tc-16-1807-2022.pdf |
| _version_ | 1828261529483476992 |
|---|---|
| author | S. Liao H. Luo J. Wang Q. Shi J. Zhang Q. Yang |
| author_facet | S. Liao H. Luo J. Wang Q. Shi J. Zhang Q. Yang |
| author_sort | S. Liao |
| collection | DOAJ |
| description | <p>Antarctic sea ice is an important component of the Earth
system. However, its role in the Earth system is still unclear due to
limited Antarctic sea-ice thickness (SIT) data. A reliable sea-ice
reanalysis can be useful to study Antarctic SIT and its role in the Earth
system. Among various Antarctic sea-ice reanalysis products, the Global
Ice-Ocean Modeling and Assimilation System (GIOMAS) output is widely used in
the research of Antarctic sea ice. As more Antarctic SIT observations with
quality control are being released, a further evaluation of Antarctic SIT from
GIOMAS is conducted in this study based on in situ and satellite
observations. Generally, though only sea-ice concentration is assimilated,
GIOMAS can basically reproduce the observed variability in sea-ice volume
and its changes in the trend before and after 2013, indicating that GIOMAS
is a good option to study the long-term variation in Antarctic sea ice.
However, due to deficiencies in the model and asymmetric changes in SIT
caused by assimilation, GIOMAS underestimates Antarctic SIT especially in
deformed ice regions, which has an impact on not only the mean state of SIT
but also the variability. Thus, besides the further development of the
model, assimilating additional sea-ice observations (e.g., SIT and sea-ice
drift) with advanced assimilation methods may be conducive to a more
accurate estimation of Antarctic SIT.</p> |
| first_indexed | 2024-04-13T03:41:07Z |
| format | Article |
| id | doaj.art-3156206e9d2b4bb3855a7ff739ea51f2 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-04-13T03:41:07Z |
| publishDate | 2022-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-3156206e9d2b4bb3855a7ff739ea51f22022-12-22T03:04:09ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242022-05-01161807181910.5194/tc-16-1807-2022An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observationsS. Liao0H. Luo1J. Wang2Q. Shi3J. Zhang4Q. Yang5School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, ChinaPolar Science Center, Applied Physics Lab, University of Washington, Seattle, WA 98105, USASchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China<p>Antarctic sea ice is an important component of the Earth system. However, its role in the Earth system is still unclear due to limited Antarctic sea-ice thickness (SIT) data. A reliable sea-ice reanalysis can be useful to study Antarctic SIT and its role in the Earth system. Among various Antarctic sea-ice reanalysis products, the Global Ice-Ocean Modeling and Assimilation System (GIOMAS) output is widely used in the research of Antarctic sea ice. As more Antarctic SIT observations with quality control are being released, a further evaluation of Antarctic SIT from GIOMAS is conducted in this study based on in situ and satellite observations. Generally, though only sea-ice concentration is assimilated, GIOMAS can basically reproduce the observed variability in sea-ice volume and its changes in the trend before and after 2013, indicating that GIOMAS is a good option to study the long-term variation in Antarctic sea ice. However, due to deficiencies in the model and asymmetric changes in SIT caused by assimilation, GIOMAS underestimates Antarctic SIT especially in deformed ice regions, which has an impact on not only the mean state of SIT but also the variability. Thus, besides the further development of the model, assimilating additional sea-ice observations (e.g., SIT and sea-ice drift) with advanced assimilation methods may be conducive to a more accurate estimation of Antarctic SIT.</p>https://tc.copernicus.org/articles/16/1807/2022/tc-16-1807-2022.pdf |
| spellingShingle | S. Liao H. Luo J. Wang Q. Shi J. Zhang Q. Yang An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations The Cryosphere |
| title | An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations |
| title_full | An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations |
| title_fullStr | An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations |
| title_full_unstemmed | An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations |
| title_short | An evaluation of Antarctic sea-ice thickness from the Global Ice-Ocean Modeling and Assimilation System based on in situ and satellite observations |
| title_sort | evaluation of antarctic sea ice thickness from the global ice ocean modeling and assimilation system based on in situ and satellite observations |
| url | https://tc.copernicus.org/articles/16/1807/2022/tc-16-1807-2022.pdf |
| work_keys_str_mv | AT sliao anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT hluo anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT jwang anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT qshi anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT jzhang anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT qyang anevaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT sliao evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT hluo evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT jwang evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT qshi evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT jzhang evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations AT qyang evaluationofantarcticseaicethicknessfromtheglobaliceoceanmodelingandassimilationsystembasedoninsituandsatelliteobservations |