Summary
Several recent empirical findings and theoretical developments related to the estimation of clear-sky atmospheric thermal radiation are discussed. It is demonstrated that the radiative behavior of water vapor at air temperatures above freezing has been parameterized as well as can or need be done, but that there may be room for some improvement at air temperatures below freezing. It is additionally shown that any procedure designed to accurately calculate atmospheric thermal radiation must be able to handle effects of airborne dust variability of both a temporal and spatial nature.
Zusammenfassung
Etliche jüngst erhaltene, empirische Resultate und theoretische Untersuchungen der Abschätzung der thermischen Strahlung der Atmosphäre aus wolkenlosem Himmel werden diskutiert. Es wird gezeigt, daß des strahlungsmäßige Verhalten des Wasserdampfes bei Lufttemperaturen über dem Gefrierpunkt so gut als möglich und nötig parameterisiert worden ist, doch bei Temperaturen unterhalb des Gefrierpunktes sind noch Verbesserungen möglich. Zusätzlich wird gezeigt, daß Vorschriften zur genauen Berechnung der atmosphärischen Thermalstrahlung in der Lage sein müssen, die Effekte der zeitlichen und räumlichen Variabilität der Staubverteilung in Betracht zu ziehen.
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Idso, S.B. On calculating thermal radiation from cloudless skies. Arch. Met. Geoph. Biocl., Ser. B 32, 53–57 (1983). https://doi.org/10.1007/BF02269389
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DOI: https://doi.org/10.1007/BF02269389