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    Monte Carlo Study of UAV-Measurable Albedo over Arctic Sea Ice

    Source: Journal of Atmospheric and Oceanic Technology:;2017:;volume 035:;issue 001::page 57
    Author:
    Podgorny, Igor
    ,
    Lubin, Dan
    ,
    Perovich, Donald K.
    DOI: 10.1175/JTECH-D-17-0066.1
    Publisher: American Meteorological Society
    Abstract: AbstractIn anticipation that unmanned aerial vehicles (UAVs) will have a useful role in atmospheric energy budget studies over sea ice, a Monte Carlo model is used to investigate three-dimensional radiative transfer over a highly inhomogeneous surface albedo involving open water, sea ice, and melt ponds. The model simulates the spatial variability in 550-nm downwelling irradiance and albedo that a UAV would measure above this surface and underneath an optically thick, horizontally homogeneous cloud. At flight altitudes higher than 100 m above the surface, an airborne radiometer will sample irradiances that are greatly smoothed horizontally as a result of photon multiple reflection. If one is interested in sampling the local energy budget contrasts between specific surface types, then the UAV must fly at a low altitude, typically within 20 m of the surface. Spatial upwelling irradiance variability in larger open water features, on the order of 1000 m wide, will remain apparent as high as 500 m above the surface. To fully investigate the impact of surface feature variability on the energy budget of the lower troposphere ice?ocean system, a UAV needs to fly at a variety of altitudes to determine how individual features contribute to the area-average albedo.
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      Monte Carlo Study of UAV-Measurable Albedo over Arctic Sea Ice

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4261024
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    contributor authorPodgorny, Igor
    contributor authorLubin, Dan
    contributor authorPerovich, Donald K.
    date accessioned2019-09-19T10:03:16Z
    date available2019-09-19T10:03:16Z
    date copyright11/30/2017 12:00:00 AM
    date issued2017
    identifier otherjtech-d-17-0066.1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4261024
    description abstractAbstractIn anticipation that unmanned aerial vehicles (UAVs) will have a useful role in atmospheric energy budget studies over sea ice, a Monte Carlo model is used to investigate three-dimensional radiative transfer over a highly inhomogeneous surface albedo involving open water, sea ice, and melt ponds. The model simulates the spatial variability in 550-nm downwelling irradiance and albedo that a UAV would measure above this surface and underneath an optically thick, horizontally homogeneous cloud. At flight altitudes higher than 100 m above the surface, an airborne radiometer will sample irradiances that are greatly smoothed horizontally as a result of photon multiple reflection. If one is interested in sampling the local energy budget contrasts between specific surface types, then the UAV must fly at a low altitude, typically within 20 m of the surface. Spatial upwelling irradiance variability in larger open water features, on the order of 1000 m wide, will remain apparent as high as 500 m above the surface. To fully investigate the impact of surface feature variability on the energy budget of the lower troposphere ice?ocean system, a UAV needs to fly at a variety of altitudes to determine how individual features contribute to the area-average albedo.
    publisherAmerican Meteorological Society
    titleMonte Carlo Study of UAV-Measurable Albedo over Arctic Sea Ice
    typeJournal Paper
    journal volume35
    journal issue1
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH-D-17-0066.1
    journal fristpage57
    journal lastpage66
    treeJournal of Atmospheric and Oceanic Technology:;2017:;volume 035:;issue 001
    contenttypeFulltext
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