Evaluation of Greenland near surface air temperature datasets
Near-surface air temperature (SAT) over Greenland has important effects on mass balance of the ice sheet, but it is unclear which SAT datasets are reliable in the region. Here extensive in situ SAT measurements (~1400 station-years) are used to assess monthly mean SAT from seven global reanalysis da...
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ftosti:oai:osti.gov:1429318 2023-07-30T04:03:49+02:00 Evaluation of Greenland near surface air temperature datasets Reeves Eyre, J. E. Jack Zeng, Xubin 2023-06-27 application/pdf http://www.osti.gov/servlets/purl/1429318 https://www.osti.gov/biblio/1429318 https://doi.org/10.5194/tc-11-1591-2017 unknown http://www.osti.gov/servlets/purl/1429318 https://www.osti.gov/biblio/1429318 https://doi.org/10.5194/tc-11-1591-2017 doi:10.5194/tc-11-1591-2017 58 GEOSCIENCES 2023 ftosti https://doi.org/10.5194/tc-11-1591-2017 2023-07-11T09:24:54Z Near-surface air temperature (SAT) over Greenland has important effects on mass balance of the ice sheet, but it is unclear which SAT datasets are reliable in the region. Here extensive in situ SAT measurements (~1400 station-years) are used to assess monthly mean SAT from seven global reanalysis datasets, five gridded SAT analyses, one satellite retrieval and three dynamically downscaled reanalyses. Strengths and weaknesses of these products are identified, and their biases are found to vary by season and glaciological regime. MERRA2 reanalysis overall performs best with mean absolute error less than 2°C in all months. Ice sheet-average annual mean SAT from different datasets are highly correlated in recent decades, but their 1901–2000 trends differ even in sign. Compared with the MERRA2 climatology combined with gridded SAT analysis anomalies, thirty-one earth system model historical runs from the CMIP5 archive reach ~5°C for the 1901–2000 average bias and have opposite trends for a number of sub-periods. Other/Unknown Material Greenland Ice Sheet SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Greenland The Cryosphere 11 4 1591 1605 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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58 GEOSCIENCES |
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58 GEOSCIENCES Reeves Eyre, J. E. Jack Zeng, Xubin Evaluation of Greenland near surface air temperature datasets |
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58 GEOSCIENCES |
description |
Near-surface air temperature (SAT) over Greenland has important effects on mass balance of the ice sheet, but it is unclear which SAT datasets are reliable in the region. Here extensive in situ SAT measurements (~1400 station-years) are used to assess monthly mean SAT from seven global reanalysis datasets, five gridded SAT analyses, one satellite retrieval and three dynamically downscaled reanalyses. Strengths and weaknesses of these products are identified, and their biases are found to vary by season and glaciological regime. MERRA2 reanalysis overall performs best with mean absolute error less than 2°C in all months. Ice sheet-average annual mean SAT from different datasets are highly correlated in recent decades, but their 1901–2000 trends differ even in sign. Compared with the MERRA2 climatology combined with gridded SAT analysis anomalies, thirty-one earth system model historical runs from the CMIP5 archive reach ~5°C for the 1901–2000 average bias and have opposite trends for a number of sub-periods. |
author |
Reeves Eyre, J. E. Jack Zeng, Xubin |
author_facet |
Reeves Eyre, J. E. Jack Zeng, Xubin |
author_sort |
Reeves Eyre, J. E. Jack |
title |
Evaluation of Greenland near surface air temperature datasets |
title_short |
Evaluation of Greenland near surface air temperature datasets |
title_full |
Evaluation of Greenland near surface air temperature datasets |
title_fullStr |
Evaluation of Greenland near surface air temperature datasets |
title_full_unstemmed |
Evaluation of Greenland near surface air temperature datasets |
title_sort |
evaluation of greenland near surface air temperature datasets |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1429318 https://www.osti.gov/biblio/1429318 https://doi.org/10.5194/tc-11-1591-2017 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
http://www.osti.gov/servlets/purl/1429318 https://www.osti.gov/biblio/1429318 https://doi.org/10.5194/tc-11-1591-2017 doi:10.5194/tc-11-1591-2017 |
op_doi |
https://doi.org/10.5194/tc-11-1591-2017 |
container_title |
The Cryosphere |
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11 |
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4 |
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1591 |
op_container_end_page |
1605 |
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1772814918568902656 |