Influence of freeze-thaw events on carbon dioxide emission from soils at different moisture and land use |
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| Authors: | Irina Kurganova Robert Teepe Norman Loftfield |
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| Institution: | 1. Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Pushchino, Moscow region, 142290, Russia
2. Institute of Soil Science and Forest Nutrition, Georg-August University G?ttingen, Büsgenweg 2, 37077, G?ttingen, Germany
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| Abstract: | Background The repeated freeze-thaw events during cold season, freezing of soils in autumn and thawing in spring are typical for the
tundra, boreal, and temperate soils. The thawing of soils during winter-summer transitions induces the release of decomposable
organic carbon and acceleration of soil respiration. The winter-spring fluxes of CO2 from permanently and seasonally frozen soils are essential part of annual carbon budget varying from 5 to 50%. The mechanisms
of the freeze-thaw activation are not absolutely clear and need clarifying. We investigated the effect of repeated freezing-thawing
events on CO2 emission from intact arable and forest soils (Luvisols, loamy silt; Central Germany) at different moisture (65% and 100%
of WHC). |
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