Direct Absorption of Solar Radiation by Atmospheric Water Vapor, Carbon Dioxide and Molecular Oxygen

Yamamoto, Giichi

doi:10.1175/1520-0469(1962)019<0182:daosrb>2.0.co;2

Cited by 109 publications

(29 citation statements)

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“…The scheme accounts for the absorption lines of H 2 O, O 3 , and CO 2 as well as the reflection from the layers of molecular atmosphere and cloudiness. The solar radiation absorption by water vapor is computed with the broadband absorption function of Yamamoto (1962). The use of this function leads to underestimation of the atmospheric absorption, as demonstrated by detailed LBL calculations of Fomin and Gershanov (1996) using the high-resolution transmission molecular absorption database (HITRAN-96) spectroscopic database of Rothman et al (1998).…”

Section: Offline Validation Of the Original And New Solar Radiation Smentioning

confidence: 99%

Impact of New Solar Radiation Parameterization in the Eta Model on the Simulation of Summer Climate over South America

Тарасова

Fernández

Pisnichenko

et al. 2006

Journal of Applied Meteorology and Climatology

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The regional Eta workstation (WS) model with horizontal resolution of 40 km has been integrated over South America for January 2003. The NCEP-DOE Reanalysis II was used for initial and lateral boundary conditions. The comparison of the model-simulated and satellite-derived values of monthly mean incident solar radiation at the surface demonstrates that the former values are larger by 20%-30% over the entire region. To improve the surface flux representation in the model, a new solar radiation scheme has been implemented in it. An offline comparison of the original and the new radiation schemes with the detailed line-by-line method demonstrates a higher accuracy for the new scheme. With the new scheme, the modelsimulated incident solar radiation at the surface is in a better agreement with the satellite-derived data. Nevertheless, a noticeable systematic difference of 10%-20% still remains, probably because of the incorrect description of cloud parameters in the model. The lower incident solar radiation in the new version of the model causes a decrease of near-surface air temperature by 0.1°-1°C and a decrease of precipitation rate by up to 20%-30% over most of the continent. The increase in the simulated incident solar radiation and temperature is found in the region of the South Atlantic convergence zone, which is responsible for the enhanced cloudiness and precipitation in the central and southeastern parts of Brazil during summer. The model results are compared with observational data of meteorological stations, the Global Precipitation Climatology Project (GPCP), and the South American Low-Level Jet Experiment (SALLJEX) and are discussed.

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Section: Offline Validation Of the Original And New Solar Radiation Smentioning

confidence: 99%

Impact of New Solar Radiation Parameterization in the Eta Model on the Simulation of Summer Climate over South America

Тарасова

Fernández

Pisnichenko

et al. 2006

Journal of Applied Meteorology and Climatology

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“…A value of 0.0667 is used for the albedo over the sea surface (Neumann and Pierson, 1966 Similar to the models formulated by Oliver and Lewellen (1978), Lacis and Hansen (1974) and Herman and Goody (1976), we adopt Yamamoto's (1962) where p,, p. are the density of water vapor and air, respectively and r, is the water vapor mixing ratio. The magnification factor M (Rodgers, 1967) accounts for the slant path and refraction.…”

Section: Radiative Transfer Equationmentioning

confidence: 99%

A one-dimensional simulation of the stratocumulus-capped mixed layer

Chen

Cotton

1983

Boundary-Layer Meteorol

272

133

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A marine stratocumulus model has been developed which has four major sub-models: (1) a one-dimensional version of the CSU cumulus model, (2) a partially-diagnostic higher-order turbulence model, (3) an atmospheric radiation model for both short-wave and long-wave radiation, and (4) a partial condensation scheme and cloud fractional parameterization.A set of numerical experiments have been performed to study the interactions among the turbulence, the long-wave radiation, the short-wave radiation, and the sub-grid condensation processes. The results indicate that surface sensible eddy heat flux and not radiative cooling is the major control on the rate of cloud-top entrainment. Cloud-top radiation cooling occurs principally within the upper part of the mixed layer. However, for the stratocumulus with numerous towers penetrated into the capping inversion, most of the long-wave radiation occurs within the capping inversion. It is found that cloud-top radiation cooling is balanced by turbulence transport of sensible heat from cloud-base levels.

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“…London ( 1952) fez um extenso estudo sobre o papel desempenhado pelo vapor dágua no aquecimento atmosférico e Yamamoto ( 1962) utiliza os d3dos de london para a estimativa da absorção da radiação solar direta pelo vapor dágua atmosférico. Hutcherson (1964) apresentou tabelas e gráficos do coeficiente de transmissão para o vapor dágua atmosférico 716-em função do comprimento de onda e do valor da água precipitável.…”

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O armazenamento atmosférico de vapor dágua sobre a região Amazônica

Marques¹,

Santos²,

Salati

1979

Acta Amaz.

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ResumoForam estimados, a partir dos dados de radiossondagens, os valores d3 umidade específica bem como são apresentadas as variações em altitude e espacial da água precipitável sobre a região Amazônica, utilizados como parâmetros repr..:sentativos do vapor dágua armazenado na atmosfera . De um modo genérico a maior concentração de vapor dágua atmosférico ocorre entre Manaus e lquitos. Estimou-se em 35mm o valor médio da água precipitável sobre a bacia Amazônica bem como ser de 18.2% o valor da "eficiência da precipitação • para a região e um tempo de reciclagem ao vapor dágua de, aproximadamente, 5.5 dias . São apre. sentados os valores mensais da umidade específica em Belém e Manaus comparados com os obtidos para Brasília. São de 44,2, 41,9 e 25,1mm os valores médios da água precipítável em Manaus, Belém e Brasllia, respectivamente . INTRODUÇÃO

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Direct Absorption of Solar Radiation by Atmospheric Water Vapor, Carbon Dioxide and Molecular Oxygen

Cited by 109 publications

References 0 publications

Impact of New Solar Radiation Parameterization in the Eta Model on the Simulation of Summer Climate over South America

Impact of New Solar Radiation Parameterization in the Eta Model on the Simulation of Summer Climate over South America

A one-dimensional simulation of the stratocumulus-capped mixed layer

O armazenamento atmosférico de vapor dágua sobre a região Amazônica

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