MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors
Recently released Moderate-Resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) collection 6.1 (C6.1) products are useful for understanding ice–atmosphere interactions over East Antarctica, but their accuracy should be known prior to application. This study assessed Level 2 an...
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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| author | Zhaosheng Zhai Yetang Wang Carleen H. Reijmer Paul C. J. P. Smeets Xueying Zhang Wuying Zhang |
| author_facet | Zhaosheng Zhai Yetang Wang Carleen H. Reijmer Paul C. J. P. Smeets Xueying Zhang Wuying Zhang |
| author_sort | Zhaosheng Zhai |
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| description | Recently released Moderate-Resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) collection 6.1 (C6.1) products are useful for understanding ice–atmosphere interactions over East Antarctica, but their accuracy should be known prior to application. This study assessed Level 2 and Level 3 MODIS C6.1 LST products (MxD11_L2 and MxD11C1) in comparison with the radiance-derived in situ LSTs from 12 weather stations. Significant cloud-related issues were identified in both LST products. By utilizing a stricter filter based on automatic weather station cloud data, despite losing 29.4% of the data, accuracy of MODIS LST was greatly improved. The cloud-screened MODIS LST exhibited cold biases (−5.18 to −0.07°C, and root mean square errors from 2.37 to 6.28°C) than in situ LSTs at most stations, with smaller cold biases at inland stations, but larger ones at coastal regions and the edge of plateau. The accuracy was notably higher during warm periods (October–March) than during cold periods (April–September). The cloud-screened MODIS C6.1 LST did not show significant improvements over C5 (Collection 5) version across East Antarctica. Ice-crystal precipitation occurring during temperature inversions at the surface (Tair-Tsurface) played a crucial role in MODIS LST accuracy on inland plateau. In coastal regions, larger MODIS LST biases were observed when the original measurements were lower. |
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| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
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| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
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| series | Journal of Glaciology |
| spelling | doaj-art-08042a895b1d44d99b84f33c6cffd9932025-01-16T21:48:20ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2024.17MODIS land surface temperature in East Antarctica: accuracy and its main affecting factorsZhaosheng Zhai0Yetang Wang1https://orcid.org/0000-0003-2499-1147Carleen H. Reijmer2https://orcid.org/0000-0001-8299-3883Paul C. J. P. Smeets3Xueying Zhang4Wuying Zhang5College of Geography and Environment, Shandong Normal University, Jinan 250014, ChinaCollege of Geography and Environment, Shandong Normal University, Jinan 250014, ChinaInstitute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, The NetherlandInstitute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, The NetherlandCollege of Geography and Environment, Shandong Normal University, Jinan 250014, ChinaCollege of Geography and Environment, Shandong Normal University, Jinan 250014, ChinaRecently released Moderate-Resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) collection 6.1 (C6.1) products are useful for understanding ice–atmosphere interactions over East Antarctica, but their accuracy should be known prior to application. This study assessed Level 2 and Level 3 MODIS C6.1 LST products (MxD11_L2 and MxD11C1) in comparison with the radiance-derived in situ LSTs from 12 weather stations. Significant cloud-related issues were identified in both LST products. By utilizing a stricter filter based on automatic weather station cloud data, despite losing 29.4% of the data, accuracy of MODIS LST was greatly improved. The cloud-screened MODIS LST exhibited cold biases (−5.18 to −0.07°C, and root mean square errors from 2.37 to 6.28°C) than in situ LSTs at most stations, with smaller cold biases at inland stations, but larger ones at coastal regions and the edge of plateau. The accuracy was notably higher during warm periods (October–March) than during cold periods (April–September). The cloud-screened MODIS C6.1 LST did not show significant improvements over C5 (Collection 5) version across East Antarctica. Ice-crystal precipitation occurring during temperature inversions at the surface (Tair-Tsurface) played a crucial role in MODIS LST accuracy on inland plateau. In coastal regions, larger MODIS LST biases were observed when the original measurements were lower.https://www.cambridge.org/core/product/identifier/S0022143024000170/type/journal_articleaccuracyEast Antarctic Ice Sheetice surface temperatureinfluencing factorsMODIS |
| spellingShingle | Zhaosheng Zhai Yetang Wang Carleen H. Reijmer Paul C. J. P. Smeets Xueying Zhang Wuying Zhang MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors Journal of Glaciology accuracy East Antarctic Ice Sheet ice surface temperature influencing factors MODIS |
| title | MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors |
| title_full | MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors |
| title_fullStr | MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors |
| title_full_unstemmed | MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors |
| title_short | MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors |
| title_sort | modis land surface temperature in east antarctica accuracy and its main affecting factors |
| topic | accuracy East Antarctic Ice Sheet ice surface temperature influencing factors MODIS |
| url | https://www.cambridge.org/core/product/identifier/S0022143024000170/type/journal_article |
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