Estimation of nocturnal <sup>222</sup>Rn soil fluxes over Russia from TROICA measurements
Author:
Berezina E. V., Elansky N. F., Moiseenko K. B., Belikov I. B., Shumsky R. A., Safronov A. N.ORCID, Brenninkmeijer C. A. M.
Abstract
Abstract. In TROICA (TRanscontinental Observations Into the Chemistry of the Atmosphere) experiments (1999–2008) simultaneous observations of near surface 222Rn concentrations and atmospheric boundary layer thermal structure were performed across North Eurasia including the central part of Russia, South Siberia and the Far East. The data on 222Rn and temperature vertical distribution are used to estimate regional scale 222Rn soil fluxes basing on calculations of nocturnal 222Rn accumulation rates in the surface layer under inversion conditions. An effect of seasonal soil thawing on 2–4 times surface 222Rn concentration increase from summer 1999 to autumn 2005 is observed. The 222Rn flux estimated from our experiments varies over Russia from 0.01 to 0.15 Bq m−2 s−1 with the highest 222Rn fluxes being derived in the mountain regions of South Siberia and the Far East.
Publisher
Copernicus GmbH
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