Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1002/eco.1378

Ключевые слова: Ground ice, Permafrost, Thermokarst, Water balance, Climate change, Cryogenics, Cultivation, Ecology, Lakes, Soil moisture, Watersheds, Long-term observations, Permafrost degradation, Potential evaporation, Surrounding environment, Water balance estimation, Estimation, anthropogenic effect, estimation method, karst hydrology, lake water, moisture content, thawing, water budget, Lena Basin, Russian Federation, Sakha, Yakutsk

Аннотация: Permafrost degradation and changes in water balance in a thermokarst lake in the middle part of the Lena River basin in eastern Siberia were investigated. We analysed the role of permafrost thawing in the water balance of a growing thermokarst lake. Long-term observations during the last two decades (1992-2008) at our thermokarst mПоказать полностьюonitoring site, Yukechi, showed significant modifications of the landforms. Observations included ground temperature, thawing depth, soil moisture content in the active layer, surface subsidence rate, and ecological changes in the surrounding environment. We also used data obtained at the Yakutsk weather station to estimate the potential evaporation. During the observation period, the water surface area increased steadily from 195m2 in 1993 to 3135m2 in 2008, and the lake water increased from 33·7m3 in 1993 to 3503m3 in 2008. Water balance estimations showed that ground ice melt made up to one third of the total water input into the lake. The rapid development of growing thermokarst lakes indicates an ecological risk on the edges of cryogenic landscapes. Finally, we found that climate change and anthropogenic impacts have led to enhanced activity of cryogenic processes in the region. In particular, cultivated fields underlying ice-rich permafrost face enhanced degradation by cryogenic and hydrological processes because of recent climate change in the region. © 2013 John Wiley & Sons, Ltd.

Журнал: Ecohydrology

Выпуск журнала: Vol. 7, Is. 2

Номера страниц: 188-196

• Fedorov A.N. (Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Sakha, Russian Federation, International Centre Best, North-Eastern Federal University, Yakutsk, Sakha, Russian Federation)
• Gavriliev P.P. (Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Sakha, Russian Federation)
• Konstantinov P.Y. (Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Sakha, Russian Federation)
• Hiyama T. (Research Institute for Humanity and Nature, Kyoto, Japan)
• Iijima Y. (Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan)
• Iwahana G. (International Research Arctic Centre, University of Alaska, Fairbanks, AK, United States)

• Scopus