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    Intercomparison of Surface Temperatures from AIRS, MERRA, and MERRA-2 with NOAA and GC-Net Weather Stations at Summit, Greenland

    Source: Journal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 005::page 1231
    Author:
    Hearty, Thomas J.
    ,
    Lee, Jae N.
    ,
    Wu, Dong L.
    ,
    Cullather, Richard
    ,
    Blaisdell, John M.
    ,
    Susskind, Joel
    ,
    Nowicki, Sophie M. J.
    DOI: 10.1175/JAMC-D-17-0216.1
    Publisher: American Meteorological Society
    Abstract: AbstractThe surface skin and air temperatures reported by the Atmospheric Infrared Sounder/Advanced Microwave Sounding Unit-A (AIRS/AMSU-A), the Modern-Era Retrospective Analysis for Research and Applications (MERRA), and MERRA-2 at Summit, Greenland, are compared with near-surface air temperatures measured at National Oceanic and Atmospheric Administration (NOAA) and Greenland Climate Network (GC-Net) weather stations. The AIRS/AMSU-A surface skin temperature (TS) is best correlated with the NOAA 2-m air temperature (T2M) but tends to be colder than the station measurements. The difference may be the result of the frequent near-surface temperature inversions in the region. The AIRS/AMSU-A surface air temperature (SAT) is also correlated with the NOAA T2M but has a warm bias during the cold season and a larger standard error than the surface temperature. The extrapolation of the temperature profile to calculate the AIRS SAT may not be valid for the strongest inversions. The GC-Net temperature sensors are not held at fixed heights throughout the year; however, they are typically closer to the surface than the NOAA station sensors. Comparing the lapse rates at the two stations shows that it is larger closer to the surface. The difference between the AIRS/AMSU-A SAT and TS is sensitive to near-surface inversions and tends to measure stronger inversions than both stations. The AIRS/AMSU-A may be sampling a thicker layer than either station. The MERRA-2 surface and near-surface temperatures show improvements over MERRA but little sensitivity to near-surface temperature inversions.
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      Intercomparison of Surface Temperatures from AIRS, MERRA, and MERRA-2 with NOAA and GC-Net Weather Stations at Summit, Greenland

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4261629
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    • Journal of Applied Meteorology and Climatology

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    contributor authorHearty, Thomas J.
    contributor authorLee, Jae N.
    contributor authorWu, Dong L.
    contributor authorCullather, Richard
    contributor authorBlaisdell, John M.
    contributor authorSusskind, Joel
    contributor authorNowicki, Sophie M. J.
    date accessioned2019-09-19T10:06:35Z
    date available2019-09-19T10:06:35Z
    date copyright4/10/2018 12:00:00 AM
    date issued2018
    identifier otherjamc-d-17-0216.1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4261629
    description abstractAbstractThe surface skin and air temperatures reported by the Atmospheric Infrared Sounder/Advanced Microwave Sounding Unit-A (AIRS/AMSU-A), the Modern-Era Retrospective Analysis for Research and Applications (MERRA), and MERRA-2 at Summit, Greenland, are compared with near-surface air temperatures measured at National Oceanic and Atmospheric Administration (NOAA) and Greenland Climate Network (GC-Net) weather stations. The AIRS/AMSU-A surface skin temperature (TS) is best correlated with the NOAA 2-m air temperature (T2M) but tends to be colder than the station measurements. The difference may be the result of the frequent near-surface temperature inversions in the region. The AIRS/AMSU-A surface air temperature (SAT) is also correlated with the NOAA T2M but has a warm bias during the cold season and a larger standard error than the surface temperature. The extrapolation of the temperature profile to calculate the AIRS SAT may not be valid for the strongest inversions. The GC-Net temperature sensors are not held at fixed heights throughout the year; however, they are typically closer to the surface than the NOAA station sensors. Comparing the lapse rates at the two stations shows that it is larger closer to the surface. The difference between the AIRS/AMSU-A SAT and TS is sensitive to near-surface inversions and tends to measure stronger inversions than both stations. The AIRS/AMSU-A may be sampling a thicker layer than either station. The MERRA-2 surface and near-surface temperatures show improvements over MERRA but little sensitivity to near-surface temperature inversions.
    publisherAmerican Meteorological Society
    titleIntercomparison of Surface Temperatures from AIRS, MERRA, and MERRA-2 with NOAA and GC-Net Weather Stations at Summit, Greenland
    typeJournal Paper
    journal volume57
    journal issue5
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-17-0216.1
    journal fristpage1231
    journal lastpage1245
    treeJournal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 005
    contenttypeFulltext
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