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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Published in:The Cryosphere
Main Authors: Reeves Eyre, J. E. Jack, Zeng, Xubin
Language:unknown
Published: 2023
Subjects:
Online Access:http://www.osti.gov/servlets/purl/1429318
https://www.osti.gov/biblio/1429318
https://doi.org/10.5194/tc-11-1591-2017
id ftosti:oai:osti.gov:1429318
record_format openpolar
spelling 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
institution Open Polar
collection SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
op_collection_id ftosti
language unknown
topic 58 GEOSCIENCES
spellingShingle 58 GEOSCIENCES
Reeves Eyre, J. E. Jack
Zeng, Xubin
Evaluation of Greenland near surface air temperature datasets
topic_facet 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
container_volume 11
container_issue 4
container_start_page 1591
op_container_end_page 1605
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