Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime
Detection of clouds over arctic regions from current satellite radiometric measurements in the visible and IR atmospheric window regions, such as those of Advanced Very High Resolution Radiometer and Landsat, is often difficult due to the high albedos of snow- and ice-covered surfaces in the visible...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.385.7023 2023-05-15T14:47:07+02:00 Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime Bo-cai Gao Wei Han North F. Larsen The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.385.7023 http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.385.7023 http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf text 1998 ftciteseerx 2016-09-18T00:32:17Z Detection of clouds over arctic regions from current satellite radiometric measurements in the visible and IR atmospheric window regions, such as those of Advanced Very High Resolution Radiometer and Landsat, is often difficult due to the high albedos of snow- and ice-covered surfaces in the visible and the nearly isothermal temperature profiles in the lower atmosphere. In this paper the authors show that the water vapor absorption channel at 1.38 �m is effective in detecting high clouds over snow- and ice-covered surfaces in the Arctic. Low-level clouds can be detected from surface snow and sea ice using a narrow channel centered at 1.5 �m with a width of approximately 10 nm because of the dark background that results from strong absorption by snow and sea ice. Imaging data with contiguous spectral coverage between 0.4 and 2.5 �m acquired with the Airborne Visible/Infrared Imaging Spectrometer during the Arctic Radiation Measurements in Column Atmosphere-Surface System in Alaska in 1995 are analyzed. The authors have observed that as wavelength increases from 1.38 �m the atmospheric water vapor absorption becomes weaker and weaker and the low-level clouds and surface tundra are increasingly seen. It is always possible to locate a narrow channel in the spectral range of 1.38–1.50 �m with appropriate water vapor absorption strength to separate water and ice clouds from surface snow, sea ice, and tundra. The simple cloud-masking technique described here is directly applicable to cloud detection during the daytime from hyperspectral imaging data over arctic regions, which will be acquired with future satellite sensors. 1. Text Arctic Sea ice Tundra Alaska Unknown Arctic |
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English |
description |
Detection of clouds over arctic regions from current satellite radiometric measurements in the visible and IR atmospheric window regions, such as those of Advanced Very High Resolution Radiometer and Landsat, is often difficult due to the high albedos of snow- and ice-covered surfaces in the visible and the nearly isothermal temperature profiles in the lower atmosphere. In this paper the authors show that the water vapor absorption channel at 1.38 �m is effective in detecting high clouds over snow- and ice-covered surfaces in the Arctic. Low-level clouds can be detected from surface snow and sea ice using a narrow channel centered at 1.5 �m with a width of approximately 10 nm because of the dark background that results from strong absorption by snow and sea ice. Imaging data with contiguous spectral coverage between 0.4 and 2.5 �m acquired with the Airborne Visible/Infrared Imaging Spectrometer during the Arctic Radiation Measurements in Column Atmosphere-Surface System in Alaska in 1995 are analyzed. The authors have observed that as wavelength increases from 1.38 �m the atmospheric water vapor absorption becomes weaker and weaker and the low-level clouds and surface tundra are increasingly seen. It is always possible to locate a narrow channel in the spectral range of 1.38–1.50 �m with appropriate water vapor absorption strength to separate water and ice clouds from surface snow, sea ice, and tundra. The simple cloud-masking technique described here is directly applicable to cloud detection during the daytime from hyperspectral imaging data over arctic regions, which will be acquired with future satellite sensors. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Bo-cai Gao Wei Han North F. Larsen |
spellingShingle |
Bo-cai Gao Wei Han North F. Larsen Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
author_facet |
Bo-cai Gao Wei Han North F. Larsen |
author_sort |
Bo-cai Gao |
title |
Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
title_short |
Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
title_full |
Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
title_fullStr |
Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
title_full_unstemmed |
Cloud detection over the Arctic region using airborne imaging spectrometer data during the daytime |
title_sort |
cloud detection over the arctic region using airborne imaging spectrometer data during the daytime |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.385.7023 http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice Tundra Alaska |
genre_facet |
Arctic Sea ice Tundra Alaska |
op_source |
http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.385.7023 http://modis-atmos.gsfc.nasa.gov/_docs/Gao et al. (1998).pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766318254024818688 |