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Weiss et al. 1983
Weiss, J., Sittkus, A., Stockhburger, H., Sartorius, H. and Münnich, K.O. (1983). Large-scale atmospheric mixing derived from meridional profiles of krypton 85. Journal of Geophysical Research 88: doi: 10.1029/JC080i013p08574. issn: 0148-0227.

Two north-south sections of the atmospheric concentration of 85Kr are presented. The most striking feature of these sections is a large concentration jump at the respective geographical position of the intertropical convergence. In October 1980 te 85Kr concentration of the northern hemisphere was about 1.5 pCi/m3 higher than the one observed in the southern hemisphere. Due to a temporal increase of the northern 83Kr concentrations the concentration difference observed in March/April 1981 was 2.5 pC1/m3. Hemispheric residence times of 1 and of 1.7 years are estimated from the two 85Kr sections. The poleward increse of the northern 85Kr concentrations is in agreement with a meridional diffusivity of 1.6¿1010 cm2/s. Five years of a continuous 85Kr record from two stations at 47.9¿N, 7.8¿E (difference in altitude 1000 m) are presented. The data show a temporal increase of 0.5 pCi m-3, a seasonal variability with an amplitude of 1-2 pCi/m3, and numerous peaks. Most of the peaks originate from European 85Kr sources. It is estimated that the yearly contribution of these sources to the global 83Kr discharge is at least 10%. The seasonal varibility of the 85Kr concentrations is tentatively explained by the seasonality of the vertical mixing intensity within the lower atmosphere.

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Abstract

Journal
Journal of Geophysical Research
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American Geophysical Union
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