Summary
This paper describes a numerical method on the evaluation of infrared radiation fluxes in a dusty atmosphere from the equation of radiative transfer. The solution is obtained by means of direct integration of the transfer equations depending upon particular monochromatic properties of multi-component medium which absorbs, emits and anisotropically scatters radiation.
The computations reveal that the dense haze in the atmosphere over NW-India considerably decreases the upward radiative flux, increases the downward radiative flux and increases the radiative cooling rates compared to an otherwise transparent atmosphere. It is concluded that this infrared cooling of the lower troposphere could result in subsidence in the atmosphere and thus may have a bearing on the rainfall pattern of the northwest India.
Zusammenfassung
Es wird eine numerische Methode für die Berechnung der infraroten Strahlungsbilanz in einer verunreinigten Atmosphäre aus der Gleichung für den Strahlungstransport abgeleitet. Die Lösung wird mittels direkter Integration der Übertragungsgleichungen erhalten, in Abhängigkeit von den besonderen Eigenschaften eines einheitlichen Mediums, welches aus vielen Bestandteilen besteht und Strahlung absorbiert, austrahlt und anisotrop zerstreut. Die Rechnungen zeigen, daß der dichte trockene Dunst in der Atmosphäre über NW-Indien den nach oben gerichteten Strahlungsfluß beträchtlich herabsetzt, den nach unten gerichteten Strahlungsfluß verstärkt und das Ausmaß der Abkühlung durch Ausstrahlung im Vergleich zu einer durchlässigen Atmosphäre erhöht. Es muß angenommen werden, daß diese infrarote Abkühlung der unteren Troposphäre zu einem Absinken führen und daher Auswirkungen auf die Regenverteilung in NW-Indien haben kann.
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Lal, M. Terrestrial radiation balance in the atmosphere over NW-India. Arch. Met. Geoph. Biokl. B. 21, 233–242 (1973). https://doi.org/10.1007/BF02243730
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DOI: https://doi.org/10.1007/BF02243730