Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic
The extensive global climate observing system (GCOS) reference upper-air network (GRUAN) datasets provide a chance to validate newly released Atmospheric Infrared Sounder (AIRS) version 7 (v7) products over the Arctic. This manuscript reports on the analysis performed to evaluate errors from AIRS ve...
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ftdoajarticles:oai:doaj.org/article:b37a9778576e4b7183df60ea0518ddf9 2023-05-15T14:48:16+02:00 Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic Lei Zhang Minghu Ding Xiangdong Zheng Junming Chen Jianping Guo Lingen Bian 2023-02-01T00:00:00Z https://doi.org/10.3390/rs15051270 https://doaj.org/article/b37a9778576e4b7183df60ea0518ddf9 EN eng MDPI AG https://www.mdpi.com/2072-4292/15/5/1270 https://doaj.org/toc/2072-4292 doi:10.3390/rs15051270 2072-4292 https://doaj.org/article/b37a9778576e4b7183df60ea0518ddf9 Remote Sensing, Vol 15, Iss 1270, p 1270 (2023) AIRS v7 Arctic temperature profile temperature inversion Science Q article 2023 ftdoajarticles https://doi.org/10.3390/rs15051270 2023-03-12T01:28:58Z The extensive global climate observing system (GCOS) reference upper-air network (GRUAN) datasets provide a chance to validate newly released Atmospheric Infrared Sounder (AIRS) version 7 (v7) products over the Arctic. This manuscript reports on the analysis performed to evaluate errors from AIRS version 6 (v6) and v7 temperature profiles and to characterize the derived low-level temperature inversion (LLI) representativeness in the Arctic region. The AIRS averaging kernel, representing the AIRS measurement sensitivity, is applied to reduce the vertical resolution of the radiosonde profiles for comparison. Due to improved retrieval algorithms, v7 produces smaller biases in the troposphere and suppresses the cold bias in v6. Nevertheless, the profile-averaged root mean square error (RMSE) increased by over 30% in v7, particularly in the winter half-year when v7 showed a larger RMSE below 800 hPa. The AIRS temperature retrieval accuracy is primarily sensitive to surface type and cloud fraction. Compared to v6, v7 has less bias over frozen land and sea ice in different cloud fraction conditions. However, the RMSEs of v7 are more sensitive to the effective cloud fraction (ECF) and are highly influenced by a more significant contribution from nonfrozen land samples. Compared to the kernel-averaged radiosonde profiles, more than 80% of the temperature profiles from v6 and v7 accurately detect LLIs. The discreteness of the AIRS’s predefined pressure level results is consistent with the radiosondes only 65% of the time for LLI depth calculation. In contrast, the AIRS can obtain LLI intensity with a relatively high correlation (>0.9). With the AIRS temperature retrieval in the boundary layer further improved, it has the potential to be used as an independent LLI detector in the Arctic region. Article in Journal/Newspaper Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Remote Sensing 15 5 1270 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
AIRS v7 Arctic temperature profile temperature inversion Science Q |
spellingShingle |
AIRS v7 Arctic temperature profile temperature inversion Science Q Lei Zhang Minghu Ding Xiangdong Zheng Junming Chen Jianping Guo Lingen Bian Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
topic_facet |
AIRS v7 Arctic temperature profile temperature inversion Science Q |
description |
The extensive global climate observing system (GCOS) reference upper-air network (GRUAN) datasets provide a chance to validate newly released Atmospheric Infrared Sounder (AIRS) version 7 (v7) products over the Arctic. This manuscript reports on the analysis performed to evaluate errors from AIRS version 6 (v6) and v7 temperature profiles and to characterize the derived low-level temperature inversion (LLI) representativeness in the Arctic region. The AIRS averaging kernel, representing the AIRS measurement sensitivity, is applied to reduce the vertical resolution of the radiosonde profiles for comparison. Due to improved retrieval algorithms, v7 produces smaller biases in the troposphere and suppresses the cold bias in v6. Nevertheless, the profile-averaged root mean square error (RMSE) increased by over 30% in v7, particularly in the winter half-year when v7 showed a larger RMSE below 800 hPa. The AIRS temperature retrieval accuracy is primarily sensitive to surface type and cloud fraction. Compared to v6, v7 has less bias over frozen land and sea ice in different cloud fraction conditions. However, the RMSEs of v7 are more sensitive to the effective cloud fraction (ECF) and are highly influenced by a more significant contribution from nonfrozen land samples. Compared to the kernel-averaged radiosonde profiles, more than 80% of the temperature profiles from v6 and v7 accurately detect LLIs. The discreteness of the AIRS’s predefined pressure level results is consistent with the radiosondes only 65% of the time for LLI depth calculation. In contrast, the AIRS can obtain LLI intensity with a relatively high correlation (>0.9). With the AIRS temperature retrieval in the boundary layer further improved, it has the potential to be used as an independent LLI detector in the Arctic region. |
format |
Article in Journal/Newspaper |
author |
Lei Zhang Minghu Ding Xiangdong Zheng Junming Chen Jianping Guo Lingen Bian |
author_facet |
Lei Zhang Minghu Ding Xiangdong Zheng Junming Chen Jianping Guo Lingen Bian |
author_sort |
Lei Zhang |
title |
Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
title_short |
Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
title_full |
Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
title_fullStr |
Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
title_full_unstemmed |
Assessment of AIRS Version 7 Temperature Profiles and Low-Level Inversions with GRUAN Radiosonde Observations in the Arctic |
title_sort |
assessment of airs version 7 temperature profiles and low-level inversions with gruan radiosonde observations in the arctic |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/rs15051270 https://doaj.org/article/b37a9778576e4b7183df60ea0518ddf9 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Remote Sensing, Vol 15, Iss 1270, p 1270 (2023) |
op_relation |
https://www.mdpi.com/2072-4292/15/5/1270 https://doaj.org/toc/2072-4292 doi:10.3390/rs15051270 2072-4292 https://doaj.org/article/b37a9778576e4b7183df60ea0518ddf9 |
op_doi |
https://doi.org/10.3390/rs15051270 |
container_title |
Remote Sensing |
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15 |
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1270 |
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1766319364982702080 |