A note on the article "Global sea level pressure and cosmic ray flux" by A. Kessler

Publisher： E. Schweizerbart'sche Verlagsbuchhandlung

ISSN： 0941-2948

Source： Meteorologische Zeitschrift, Vol.11, Iss.6, 2002-11, pp. : 415-417

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Abstract

When the global precipitation increases the precipitable water decreases and vice versa. Here we study the impact of a harmonic precipitation fluctuation (with zero time mean and constant global evaporation) on the precipitable water; fluctuations of the precipitable water imply fluctuations of global surface pressure. The relation between the amplitudes of the forcing and the response is frequency dependent. A global 27 day surface pressure fluctuation with amplitude of 0.1 hPa, as suggested by the IGY data, could be explained by a precipitation fluctuation with the same frequency and an amplitude of about 0.25 mm/day; the precipitation wave would lead the surface pressure wave by about 7 days. These estimates are consistent with, although they do not prove the reality of, the Svensmark hypothesis as discussed by Kessler.