TY - JOUR
T1 - The k-distribution method and correlated-k approximation for a shortwave radiative transfer model
AU - Kato, Seiji
AU - Ackerman, Thomas P.
AU - Mather, James H.
AU - Clothiaux, Eugene E.
N1 - Funding Information:
We thank S.A. Clough and E.J. Mlawer for useful suggestions related to the correlated-k approximation, G.P. Anderson for a helpful advice in the use of the MODTRAN3 radiative transfer code, E.P. Shettle for discussions regarding ozone cross sections, W.H. Brune for discussions regarding line intensities, W.J. Wiscombe for discussions regarding the exponential-sum Þtting method, C.F. Bohren for useful suggestions on preparing the manuscript, and C. Pavloski for putting tables on line. This work was supported by the Jet Propulsion Laboratory (under contract NO. 959034, prime: NASA) as part of the MISR program, and the Environmental Science Division of the U.S. Department of Energy (under grant No. DE-FG02-90ER61071) as a part of the Atmospheric Radiation Measurement (ARM) program.
PY - 1999/5
Y1 - 1999/5
N2 - Absorption cross sections are tabulated for water vapor, including continuum absorption, ozone, oxygen and carbon dioxide in the solar spectral region by adopting the k-distribution method. These tables are generated based on line-by-line code results for ranges of total pressure, temperature and water vapor concentration typical of values throughout the troposphere. These tables are incorporated into a shortwave radiative transfer code, which has 32 wavelength intervals across the solar spectrum, by using the correlated-k approximation in order to evaluate the accuracy in the broad band direct normal irradiance computation. A comparison of the direct normal irradiance with MODTRAN3 demonstrates that these tables can be used for shortwave broad band irradiance computations; the difference in the transmissivity is within 0.01 throughout most of the solar spectral region.
AB - Absorption cross sections are tabulated for water vapor, including continuum absorption, ozone, oxygen and carbon dioxide in the solar spectral region by adopting the k-distribution method. These tables are generated based on line-by-line code results for ranges of total pressure, temperature and water vapor concentration typical of values throughout the troposphere. These tables are incorporated into a shortwave radiative transfer code, which has 32 wavelength intervals across the solar spectrum, by using the correlated-k approximation in order to evaluate the accuracy in the broad band direct normal irradiance computation. A comparison of the direct normal irradiance with MODTRAN3 demonstrates that these tables can be used for shortwave broad band irradiance computations; the difference in the transmissivity is within 0.01 throughout most of the solar spectral region.
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U2 - 10.1016/S0022-4073(98)00075-2
DO - 10.1016/S0022-4073(98)00075-2
M3 - Article
AN - SCOPUS:0033005594
SN - 0022-4073
VL - 62
SP - 109
EP - 121
JO - Journal of Quantitative Spectroscopy and Radiative Transfer
JF - Journal of Quantitative Spectroscopy and Radiative Transfer
IS - 1
ER -