Search Results

You are looking at 81 - 90 of 12,140 items for :

  • Radiative transfer x
  • All content x
Clear All
Vladimir E. Zuev and Georgii A. Titov

176 $OURNAL OF THE ATMOSPHERIC SCIENCES Vo~..$2, No. 2Radiative Transfer in Cloud Fields with Random Geometry VLADIMIR ]~. ZUE- AND GEORGII A. TrrovInstitute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences. Tomsk, Russia(Manuscript received 15 September 1993, in final form 9 May 1994)ABSTRACT Numerical results are given to estimate the importance of effects associated with the stochastic

Full access
T. Victor Barcilon

1626 JOURNAL OF THE ATMOSPHERIC SCIENCES VorvMg32On Chahine's Relaxation Method for the Radiative Transfer Equation VICTOR ~ARCILONDepart~nenl of tke Geophysical Sciences, The University of Chicago, Chicago, IlL 60637 (Manuscript received 16 December 1974, in revised form 6 May 1975) ABSTRACT T~e iteration scheme proposed by Chahine for the solution of the radiative transfer

Full access
Philip M. Gabriel, Philip T. Partain, and Graeme L. Stephens

Fu and Liou (1992) k -distribution is used in the Colorado State University (CSU) global circulation model (GCM) to specify the optical properties of the atmosphere, 54 radiative transfer calculations are required in the shortwave and another 67 in the infrared per model grid cell, to calculate broadband fluxes and heating rates. Therefore a significant fraction of the GCM run time is spent in the computation of the optical properties and in performing the 2-stream calculations. Accuracy

Full access
Bruce H. J. McKellar and Michael A. Box

MA-1981 BRUCE H. J. McKELLAR AND MICHAEL A. BOX 1063The Scaling Group of the Radiative Transfer Equation BRUCE H. J. MCKELLARTheoretical Physics Group, School of Physics, University of Melbourne, Parkville Victoria 3052, Australia MICHAEL A. Box~Institute of Atmospheric Physics, The University of Arizona, Tuscon, AZ 85721(Manuscript received 26 September 1980)ABSTRACT We show that the

Full access
Philipp M. Kostka, Martin Weissmann, Robert Buras, Bernhard Mayer, and Olaf Stiller

respective observation types, are vital parts of modern DA systems. For variational DA systems, their linearized and adjoint versions are also required, while for ensemble DA systems the forward operator itself is sufficient. For satellite radiances, the forward operator includes a radiative transfer (RT) model that computes the radiances that would be measured by the satellite instrument for a given atmospheric state. In the presence of clouds, RT computations can become very demanding ( Liou 1992

Full access
R. Viskanta, R. W. Bergstrom, and R. O. Johnson

JULY1977 R. VISKANTA, R. W. BERGSTROM AND R. O. JOHNSON 1091Radiative Transfer in a Polluted Urban Planetary Boundary Layer R. VISKANTA, R. W. BERGSTROMt AND R. O. JOHNSON2Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, Ind. 47907 (Manuscript received 10 November 1976, in revised form 29 March 1977)ABSTRACT Radiative transfer in a polluted

Full access
Seiji Kato, Norman G. Loeb, Fred G. Rose, David R. Doelling, David A. Rutan, Thomas E. Caldwell, Lisan Yu, and Robert A. Weller

sensible heat fluxes at the surface. Unlike TOA irradiances that can be estimated from broadband radiance observations ( Loeb et al. 2005 ), a global estimate of the irradiance at the surface is only possible through radiative transfer calculations. For example, Zhang et al. (1995 , 2004 ) use satellite-derived cloud properties ( Rossow and Schiffer 1991 , 1999 ) and temperature and humidity as inputs to compute surface irradiances. Pinker et al. (2003) estimate surface shortwave irradiances using

Full access
Goodwin Gibbins and Joanna D. Haigh

production rates. The two main perspectives that have gained traction in the literature are one that considers the entropy production due to all radiative and nonradiative irreversible processes (here labeled planetary ) and one that restricts itself to the nonradiative irreversible processes only (labeled material ). We advance a third, labeled the transfer entropy production rate, which accounts for the entropy produced by all processes that transfer heat within the climate system—radiative and

Restricted access
Yongfeng Qu, Maya Milliez, Luc Musson-Genon, and Bertrand Carissimo

1. Introduction Interest in urban climatology has increased in the past decade. It corresponds to the thermal and dynamical airflow response to the urban system solicitations, resulting in radiative transfers and convective exchanges within the urban air and with the building walls ( Grimmond and Oke 1999 ; Arnfield 2003 ). In the past few years, numerical studies have been conducted to solve the surface energy balance (SEB) in urban canopies, with different degrees of simplification, using

Full access
Jeffrey N. Cuzzi, Thomas P. Ackerman, and Leland C. Helmle

APRIL 1982 NOTES AND CORRESPONDENCE 917NOTES AND CORRESPONDENCEThe Delta-Four-Stream Approximation for Radiative Flux Transfer JEFFREY N. CuzzI AND THOMAS P. ACKERMAN1Space Science Division, Ames Research Center,' NASA, Moffett Field, CA 94035 LELAND C. HELMLE Informatics, Inc., Palo Alto, CA (3 April 1981 and 30 November 1981)ABSTRACT - We present an approximate

Full access