Monte Carlo Study of UAV-Measurable Albedo over Arctic Sea IceSource: Journal of Atmospheric and Oceanic Technology:;2017:;volume 035:;issue 001::page 57DOI: 10.1175/JTECH-D-17-0066.1Publisher: 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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contributor author | Podgorny, Igor | |
contributor author | Lubin, Dan | |
contributor author | Perovich, Donald K. | |
date accessioned | 2019-09-19T10:03:16Z | |
date available | 2019-09-19T10:03:16Z | |
date copyright | 11/30/2017 12:00:00 AM | |
date issued | 2017 | |
identifier other | jtech-d-17-0066.1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4261024 | |
description 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. | |
publisher | American Meteorological Society | |
title | Monte Carlo Study of UAV-Measurable Albedo over Arctic Sea Ice | |
type | Journal Paper | |
journal volume | 35 | |
journal issue | 1 | |
journal title | Journal of Atmospheric and Oceanic Technology | |
identifier doi | 10.1175/JTECH-D-17-0066.1 | |
journal fristpage | 57 | |
journal lastpage | 66 | |
tree | Journal of Atmospheric and Oceanic Technology:;2017:;volume 035:;issue 001 | |
contenttype | Fulltext |