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    A Critical Examination of Satellite Cloud Retrieval from AVHRR in the Arctic Using SHEBA Data

    Source: Journal of Applied Meteorology:;2002:;volume( 041 ):;issue: 012::page 1195
    Author:
    Xiong, Xiaozhen
    ,
    Lubin, Dan
    ,
    Li, Wei
    ,
    Stamnes, Knut
    DOI: 10.1175/1520-0450(2002)041<1195:ACEOSC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: This study examines the validity and limitations associated with retrieval of cloud optical depth τ and effective droplet size re in the Arctic from Advanced Very High Resolution Radiometer (AVHRR) channels 2 (0.725?1.10 ?m), 3 (3.55?3.93 ?m), and 4 (10.3?11.3 ?m). The error in re is found to be normally less than 10%, but the uncertainty in τ can be more than 50% for a 10% uncertainty in the satellite-measured radiance. Model simulations show that the satellite-retrieved cloud optical depth τsat is overestimated by up to 20% if the vertical cloud inhomogeneity is ignored and is underestimated by more than 50% if overlap of cirrus and liquid water clouds is ignored. Under partially cloudy conditions, τsat is larger than that derived from surface-measured downward solar irradiance (τsurf) by 40%?130%, depending on cloud-cover fraction. Here, τsat derived from NOAA-14 AVHRR data agrees well with τsurf derived from surface measurements of solar irradiance at the Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp in summer, but τsat is about 2.3 times τsurf before the onset of snowmelt. This overestimate of τsat is mainly due to the high reflectivity in AVHRR channel 2 over snow/ice surfaces, the presence of partial cloud cover, and inaccurate representation of the scattering phase function for mixed-phase clouds.
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      A Critical Examination of Satellite Cloud Retrieval from AVHRR in the Arctic Using SHEBA Data

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4148619
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    • Journal of Applied Meteorology

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    contributor authorXiong, Xiaozhen
    contributor authorLubin, Dan
    contributor authorLi, Wei
    contributor authorStamnes, Knut
    date accessioned2017-06-09T14:08:35Z
    date available2017-06-09T14:08:35Z
    date copyright2002/12/01
    date issued2002
    identifier issn0894-8763
    identifier otherams-13196.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4148619
    description abstractThis study examines the validity and limitations associated with retrieval of cloud optical depth τ and effective droplet size re in the Arctic from Advanced Very High Resolution Radiometer (AVHRR) channels 2 (0.725?1.10 ?m), 3 (3.55?3.93 ?m), and 4 (10.3?11.3 ?m). The error in re is found to be normally less than 10%, but the uncertainty in τ can be more than 50% for a 10% uncertainty in the satellite-measured radiance. Model simulations show that the satellite-retrieved cloud optical depth τsat is overestimated by up to 20% if the vertical cloud inhomogeneity is ignored and is underestimated by more than 50% if overlap of cirrus and liquid water clouds is ignored. Under partially cloudy conditions, τsat is larger than that derived from surface-measured downward solar irradiance (τsurf) by 40%?130%, depending on cloud-cover fraction. Here, τsat derived from NOAA-14 AVHRR data agrees well with τsurf derived from surface measurements of solar irradiance at the Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp in summer, but τsat is about 2.3 times τsurf before the onset of snowmelt. This overestimate of τsat is mainly due to the high reflectivity in AVHRR channel 2 over snow/ice surfaces, the presence of partial cloud cover, and inaccurate representation of the scattering phase function for mixed-phase clouds.
    publisherAmerican Meteorological Society
    titleA Critical Examination of Satellite Cloud Retrieval from AVHRR in the Arctic Using SHEBA Data
    typeJournal Paper
    journal volume41
    journal issue12
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(2002)041<1195:ACEOSC>2.0.CO;2
    journal fristpage1195
    journal lastpage1209
    treeJournal of Applied Meteorology:;2002:;volume( 041 ):;issue: 012
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian