Irina Kurganova

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56 Emission of carbon dioxide (СО2) from soils is one of the main fluxes of the global carbon cycle [1]; the vegetation, soil type, and climate dependent hydro thermal conditions [11, 12] are the main factors that influence the emission component of the carbon cycle [11, 12]. Evaluation of the СО2 fluxes from soil is based as a rule on the observations(More)
The collapse of Soviet Union in early 1990s led to abandonment of large area of arable land which is assumed to act as a carbon (C) sink. We studied the ability of two dynamic soil C models (Yasso07 and RothC) to predict changes in soil C content after cropland abandonment. The performance of the models was compared using the results of a long-term(More)
The collapse of collective farming in Russia after 1990 and the subsequent economic crisis led to the abandonment of more than 45 million ha of arable lands (23% of the agricultural area). This was the most widespread and abrupt land use change in the 20th century in the northern hemisphere. The withdrawal of land area from cultivation led to several(More)
 Determination of the C balance is of considerable importance when forecasting climate and environmental changes. Soil respiration and biological productivity of ecosystems (net primary production; NPP) are the basic components of the terrestrial C cycle. In this study, a previously made assessment of the annual CO2 flux from Russian soils was improved(More)
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(More)
219 Reduction of agricultural lands is a global process which, since the mid-20th century, has spread over many countries all over the world. Calculations performed in the Institute of Geography of the Russian Academy of Sciences [3] showed that 223 Mha of land has been withdrawn from agricultural use in 80 countries between the years 1961 and 2003, about(More)
412 Climate changes observed at present in a large part of Russia are expressed in both general raise of air tem perature and increasing climate aridity [1]. Increased frequency and area of droughts are observed not only in regions with a forecasted decrease in precipitation, but also in areas where precipitation tends to increase due to climate changes(More)
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