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Title: Emissivity of terrestrial materials in the 3--5 [mu]m atmospheric window

Abstract

Accurate satellite remote sensing of surface temperature has become more and more important in the context of calculating the radiation balance input to climate models for assessment of global change. Surface temperatures can be determined from radiance measurements in both the 3--5 [mu]m and 8--14 [mu]m atmospheric windows, given some estimate of surface emissivity. The 3--5 [mu]m region offers a potential advantage in the accuracy of temperature determination, because temperature estimates are more than two times less sensitive to emissivity errors in this region. However, very little is known about the emissivities of land surface materials in the 3--5 [mu]m region, if emissivities were more variable in the 3--5 [mu]m region than in the 8--14 [mu]m region, this might cancel the advantage of lower sensitivity to emissivity error in the shorter wavelength region. This article documents the directional hemispherical spectral reflectance, from which emissivity can be calculated, of a wide variety of earth surface materials in the 3--5 [mu]m region, and compares their average reflectances in AVHRR Band 3 to that in Bands 4 and 5. Emissivity and reflectivity in the 3--5 [mu]m region affect other significant remote sensing measurement of global change besides those of surface temperature along. Themore » accuracy of atmospheric sounding of CO near 4.7 [mu]m, for example, depends in part on knowledge of such surface properties to account for surface upwelling radiation.« less

Authors:
;  [1]
  1. (Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Earth and Planetary Sciences)
Publication Date:
OSTI Identifier:
7239878
Resource Type:
Journal Article
Journal Name:
Remote Sensing of Environment; (United States)
Additional Journal Information:
Journal Volume: 47:3; Journal ID: ISSN 0034-4257
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CARBON MONOXIDE; AIR POLLUTION MONITORING; CLIMATIC CHANGE; MONITORING; EARTH ATMOSPHERE; AMBIENT TEMPERATURE; REMOTE SENSING; ACCURACY; DATA COVARIANCES; TEMPERATURE MEASUREMENT; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; OXIDES; OXYGEN COMPOUNDS; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Salisbury, J.W., and D'Aria, D.M. Emissivity of terrestrial materials in the 3--5 [mu]m atmospheric window. United States: N. p., 1994. Web. doi:10.1016/0034-4257(94)90102-3.
Salisbury, J.W., & D'Aria, D.M. Emissivity of terrestrial materials in the 3--5 [mu]m atmospheric window. United States. doi:10.1016/0034-4257(94)90102-3.
Salisbury, J.W., and D'Aria, D.M. Tue . "Emissivity of terrestrial materials in the 3--5 [mu]m atmospheric window". United States. doi:10.1016/0034-4257(94)90102-3.
@article{osti_7239878,
title = {Emissivity of terrestrial materials in the 3--5 [mu]m atmospheric window},
author = {Salisbury, J.W. and D'Aria, D.M.},
abstractNote = {Accurate satellite remote sensing of surface temperature has become more and more important in the context of calculating the radiation balance input to climate models for assessment of global change. Surface temperatures can be determined from radiance measurements in both the 3--5 [mu]m and 8--14 [mu]m atmospheric windows, given some estimate of surface emissivity. The 3--5 [mu]m region offers a potential advantage in the accuracy of temperature determination, because temperature estimates are more than two times less sensitive to emissivity errors in this region. However, very little is known about the emissivities of land surface materials in the 3--5 [mu]m region, if emissivities were more variable in the 3--5 [mu]m region than in the 8--14 [mu]m region, this might cancel the advantage of lower sensitivity to emissivity error in the shorter wavelength region. This article documents the directional hemispherical spectral reflectance, from which emissivity can be calculated, of a wide variety of earth surface materials in the 3--5 [mu]m region, and compares their average reflectances in AVHRR Band 3 to that in Bands 4 and 5. Emissivity and reflectivity in the 3--5 [mu]m region affect other significant remote sensing measurement of global change besides those of surface temperature along. The accuracy of atmospheric sounding of CO near 4.7 [mu]m, for example, depends in part on knowledge of such surface properties to account for surface upwelling radiation.},
doi = {10.1016/0034-4257(94)90102-3},
journal = {Remote Sensing of Environment; (United States)},
issn = {0034-4257},
number = ,
volume = 47:3,
place = {United States},
year = {1994},
month = {3}
}