Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ W. Babel [et al.] // Biogeosciences. - 2014. - Vol. 11, Is. 23. - P6633-6656, DOI 10.5194/bg-11-6633-2014 . - ISSN 1726-4170
Аннотация: The Tibetan Plateau has a significant role with regard to atmospheric circulation and the monsoon in particular. Changes between a closed plant cover and open bare soil are one of the striking effects of land use degradation observed with unsustainable range management or climate change, but experiments investigating changes of surface properties and processes together with atmospheric feedbacks are rare and have not been undertaken in the world's two largest alpine ecosystems, the alpine steppe and the Kobresia pygmaea pastures of the Tibetan Plateau. We connected measurements of micro-lysimeter, chamber, 13C labelling, and eddy covariance and combined the observations with land surface and atmospheric models, adapted to the highland conditions. This allowed us to analyse how three degradation stages affect the water and carbon cycle of pastures on the landscape scale within the core region of the Kobresia pygmaea ecosystem. The study revealed that increasing degradation of the Kobresia turf affects carbon allocation and strongly reduces the carbon uptake, compromising the function of Kobresia pastures as a carbon sink. Pasture degradation leads to a shift from transpiration to evaporation while a change in the sum of evapotranspiration over a longer period cannot be confirmed. The results show an earlier onset of convection and cloud generation, likely triggered by a shift in evapotranspiration timing when dominated by evaporation. Consequently, precipitation starts earlier and clouds decrease the incoming solar radiation. In summary, the changes in surface properties by pasture degradation found on the highland have a significant influence on larger scales.

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Держатели документа:
Department of Micrometeorology, University of BayreuthBayreuth, Germany
Department of Plant Ecology and Ecosystem Research, University of GottingenGottingen, Germany
Department of Botany, Senckenberg Museum GorlitzGorlitz, Germany
Department of Soil Sciences of Temperate Ecosystems, University of GottingenGottingen, Germany
Department of Geography, Centre for Atmospheric Science, University of CambridgeCambridge, United Kingdom
Institute of Integrated Environmental Sciences, University of Koblenz-LandauKoblenz, Germany
Institute for Soil Science, Leibniz Universitat HannoverHanover, Germany
V. N. Sukachev Institute of ForestKrasnoyarsk, Russian Federation
School of Life Sciences, Lanzhou UniversityLanzhou, China
Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of SciencesBeijing, China
Institute of Tibetan Plateau Research, Key Laboratory of Tibetan Environment Changes and Land Surface, Chinese Academy of Sciences, ProcessesBeijing, China
Institute of Tibetan Plateau Research, Laboratory of Alpine Ecology and Biodiversity Focuses, Chinese Academy of Sciences, ProcessesBeijing, China
German Centre for Integrative Biodiversity Research (IDiv)Halle-Jena-Leipzig, Germany
Department of Agricultural Soil Science, University of GottingenGottingen, Germany
Institute of Environmental Sciences, Kazan Federal UniversityKazan, Russian Federation
Faculty of Geography, University of MarburgMarburg, Germany
Member of Bayreuth Center of Ecology and Ecosystem ResearchBayreuth, Germany
Centre for Environmental and Climate Research, Lund UniversityLund, Sweden
Thunen Institute of Climate-Smart AgricultureBraunschweig, Germany
University of Innsbruck Institute of Ecology ResearchInnsbruck, Austria
Department of Meteorology, Pennsylvania State UniversityPA, United States

Доп.точки доступа:
Babel, W.; Biermann, T.; Coners, H.; Falge, E.; Seeber, E.; Ingrisch, J.; Schleu?, P.-M.; Gerken, T.; Leonbacher, J.; Leipold, T.; Willinghofer, S.; Schutzenmeister, K.; Shibistova, O.; Becker, L.; Hafner, S.; Spielvogel, S.; Li, X.; Xu, X.; Sun, Y.; Zhang, L.; Yang, Y.; Ma, Y.; Wesche, K.; Graf, H.-F.; Leuschner, C.; Guggenberger, G.; Kuzyakov, Y.; Miehe, G.; Foken, T.