Parameterization of Macroscale Transient Heat Transport for Use in a Mean-Motion Model of the General Circulation

Clapp, Philip F.

doi:10.1175/1520-0450(1970)009<0554:pomtht>2.0.co;2

Cited by 18 publications

(5 citation statements)

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“…The advection by mean wind (A D ) is given by Adem (1970b) where ∇ 2 is the two-dimensional horizontal Laplacian operator and K is the "Austausch" coefficient, which is taken as a constant equal to 3 x 10 6 m 2 s -1 . This value of K is of the same order of magnitude as for the migratory cyclones and anticyclones of the middle latitudes, which are considered as turbulent eddies (Defant, 1921;Clapp, 1970).…”

Section: Other Parameterizationsmentioning

confidence: 99%

Feedback effects of atmospheric CO<sub>2</sub>-induced warming

Adem¹,

Garduño

1998

GeofInt

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Utilizando un modelo termodinámico del clima, se lleva a cabo un estudio sobre los cambios en la temperatura y precipitación debidos a una duplicación del contenido atmosférico de CO2 y sobre la importancia relativa, en la temperatura, de los mecanismos de retroalimentación asociados con los aumentos de vapor de agua, nieve-hielo y nubosidad. Los factores de retroalimentación del modelo termodinámico son similares a los de los modelos de Hansen et al. (1984) y Schlesinger (1986). El factor de retroalimentación de los tres mecanismos combinados es 4.0. Los resultados dependen en forma importante del contenido de vapor de agua en la banda del CO2 (12-19m). El aumento de temperatura debido a la duplicación de CO2 es igual a 1.2° C cuando existe vapor de agua en dicha banda y es igual a 3.5° C cuando no hay vapor de agua. Los resultados muestran que una posible causa de las grandes diferencias en las soluciones obtenidas con diferentes modelos podrían ser las discrepancias en la cantidad y distribución del vapor de agua en la atmósfera, y en el tratamiento de su efecto en la banda del CO2.

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Section: Other Parameterizationsmentioning

confidence: 99%

Feedback effects of atmospheric CO<sub>2</sub>-induced warming

Adem¹,

Garduño

1998

GeofInt

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“…Then, if we put f= 10-4 sec-1 and S= 2 * 10-2 m2 mb-2 sec-2, we have from The former case was discussed by Clapp (1970) and Green (1970), and, later WiinNielsen and Fuenzalida used this parametarization for the simulation of the axisymmetric circulation of the atmosphere. The latter case corresponds to the case where we use the so-called Austausch coefficient.…”

Section: Magnitude Of the Austausch Coefficient Kmentioning

confidence: 99%

The Austausch Coefficient in Relation to the Meridional Eddy Transport of Heat

Gambo

1977

Journal of the Meteorological Society of Japan

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“…It is apparent that the modelling of the momentum transport requires some parameterization of the heat transfer together with one for potential vorticity. It has been customary to use an exchange coefficient for the heat transport as in , an approach that has received support from observational studies using time-averaged data (Clapp, 1970). There seems to be no reason why such a specification should not be applicable to the zonal mean.…”

Section: Energeticsmentioning

confidence: 99%

On the simulation of of the axisymmetric circulation the atmosphere

Wiin‐Nielsen

Fuenzalida

1975

Tellus A: Dynamic Meteorology and Oceanography

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The paper describes a zonally averaged model of the atmospheric state in which the effects of the eddies on the zonal state are parameterized in terms of exchange coefficients which vary with latitude and time in the most general model. In comparison with earlier investigations this model contains a more detailed description of the atmospheric heat budget and a more general description of the exchange mechanisms. However, the basic model is still a quasi-geostrophic, two-level representation of the large-scale flow. Two experiments have been carried out. Both of them simulate the seasonal variation of the zonally averaged state of the atmosphere. The first experiment uses diagnostically determined exchange coefficients which are based on an observational study and which depend upon latitude only. The second experiment employs exchange coefficients which vary with latitude and time. In addition, the magnitude and the functional dependence on latitude are determined by the model parameters at any given time. The results show that a considerably improved simulation of the zonally-averaged state is obtained by a better parameterization of the processes entering the heat budget as compared with earlier studies. Furthermore, the exchange coefficients which vary with latitude and time and which are, at least in part, determined by the model, result in further improvements of most features of the model. The major limitation of the model is its small vertical resolution and its quasigeostrophic nature.

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Parameterization of Macroscale Transient Heat Transport for Use in a Mean-Motion Model of the General Circulation

Cited by 18 publications

References 0 publications

Feedback effects of atmospheric CO<sub>2</sub>-induced warming

Feedback effects of atmospheric CO<sub>2</sub>-induced warming

The Austausch Coefficient in Relation to the Meridional Eddy Transport of Heat

On the simulation of of the axisymmetric circulation the atmosphere

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