[1]CHEN Shanshan,ZANG Shuying,SUN Li.Dynamic Variation of Soil Moisture and Impact in Permafrost Regions in Northeast China[J].Research of Soil and Water Conservation,2020,27(03):113-118.
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Dynamic Variation of Soil Moisture and Impact in Permafrost Regions in Northeast China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
113-118
Column:
目次
Public date:
2020-04-20
- Title:
- Dynamic Variation of Soil Moisture and Impact in Permafrost Regions in Northeast China
- Keywords:
- soil moisture; spatiotemporal variation; vegetation; permafrost region in northeastern China
- CLC:
- P642.14
- DOI:
- -
- Abstract:
- Climate warming leads to permafrost degradation in the high latitudes, causing changes of freeze-thaw processes of active layer and soil hydrothermal processes in permafrost regions. Soil moisture is a key variable in the climate system. Its variation would cause impact on the climate system and vegetation ecosystems. Using mathematical statistics method and the EAR-Interim, we reanalyzed soil moisture data set to examine the spatial-temporal characteristics of soil moisture. On the basis, meteorological data were used to explain the reasons of soil moisture change and its changes would lead to the influence on the environment and ecology in the permafrost regions in Northeastern China. The results show that: from 1979 to 2017, the mean annual soil moisture in the permafrost regions of northeast China had been decreasing in 7 cm, and 28 cm depths, and the annual soil moisture was the lowest in 2008; in terms of seasonal changes, soil moisture had reached the maximum in the summer and autumn; the soil moisture in 7 cm and 28 cm depths had two peaks, namely, the peaks occurred in April and August, the maximum soil moisture occurred in August; in terms of spatial variation, the soil moisture had changed significantly in the central zone of the permafrost region in northeast China, and soil moisture had been decreasing in the entire permafrost region. Under the background of global climate warming and precipitation reduction, soil moisture may become the main factor affecting vegetation growth and other ecosystem processes in the permafrost regions of northeast China. Research for the spatial and temporal changes of soil moisture is of great significance to further understand the ecosystem changes and permafrost carbon feedback effects in the permafrost region in northeastern China.
- References:
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Last Update:
2020-04-30