An Economical Scheme for the Vertical Integral of Atmospheric Emission in Longwave Radiative Transfer
نویسنده
چکیده
A computationally fast scheme has been developed which accurately evaluates the vertical integral of the transmission function for longwave radiative transfer, incorporating with the multi-parameter random model. In this scheme transmittances are calculated only between the half-levels of the vertical coordinate, while the Planck fluxes are evaluated at both the halfand full-levels. The vertical integral in one layer can be represented with two terms; one is for a temperature profile with no inversion and the other for a profile with inversion. The validity of this scheme has been investigated by calculating temperature profiles in radiative and radiative-convective equilibria. It has been found that this scheme can accurately evaluate the cooling rates at levels with extreme temperatures near the tropopause and stratopause, and that the temperature profiles contain no fluctuation due to two-grid noise.
منابع مشابه
A new one-dimensional radiative equilibrium model for investigating atmospheric radiation entropy flux.
A new one-dimensional radiative equilibrium model is built to analytically evaluate the vertical profile of the Earth's atmospheric radiation entropy flux under the assumption that atmospheric longwave radiation emission behaves as a greybody and shortwave radiation as a diluted blackbody. Results show that both the atmospheric shortwave and net longwave radiation entropy fluxes increase with a...
متن کاملRadiative Constraints on the Hydrological Cycle in an Idealized Radiative–Convective Equilibrium Model
The radiative constraints on the partitioning of the surface energy budget and, hence, on the strength of the hydrological cycle are analyzed in an idealized one-dimensional radiative–convective equilibrium model formulated in terms of the energy budgets at the top of the atmosphere, the subcloud layer, and the free atmosphere, which enables it to predict both surface relative humidity and the ...
متن کاملA Numerical Study of Natural Convection and Radiation Interaction in Vertical Circular Pin
A numerical finite difference study has been earned out for two dimensional radiation-natural convection interaction phenomena in a vertical circular pin located at a non-participating (i.e. transparent) fluid. The coupled conservation equations in boundary layer (continuity, momentum, and energy equations) and pin energy equation are solved simultaneously using modified box method and fully im...
متن کاملAn Assessment of Wind Erosion Schemes in Dust Emission Simulations over the Middle East
Extended abstract 1- INTRODUCTION Atmospheric aerosols, solid and liquid particles in the atmosphere, play a crucial role in the atmospheric radiation equilibrium. These particles have an influence on the scattering and absorption of short wavelength radiation, and on the other hand, affect radiation absorption and emission in long wavelengths. Dust particles are among the importan...
متن کاملA Systematic Study of Longwave Radiative Heating and Cooling within Valleys and Basins Using a Three-Dimensional Radiative Transfer Model
The Monte Carlo code for the physically correct tracing of photons in cloudy atmospheres (MYSTIC) three-dimensional radiative transfer model was used in a parametric study to determine the strength of longwave radiative heating and cooling in atmospheres enclosed in idealized valleys and basins. The parameters investigated included valley or basin shape, width, and near-surface temperature cont...
متن کامل