Landslides on the Loess Plateau of China: a latest statistics together with a close look |
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| Authors: | Xu Xiang-Zhou Guo Wen-Zhao Liu Ya-Kun Ma Jian-Zhong Wang Wen-Long Zhang Hong-Wu Gao Hang |
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| Institution: | 1.Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing,China;2.Hainan Key Laboratory of Earth Observation, Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Sanya,China;3.University of Chinese Academy of Sciences,Beijing,China |
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| Abstract: | China has a serious wildfire problem with a large number of fires in the south of the country especially during the winter (DJF) and spring (MAM) seasons. This study focused on identifying the causes of variability in inter-annual fire seasons. The relationship between fires and climatic parameters (precipitation, evapotranspiration and potential evapotranspiration) was evaluated on annual and seasonal (winter, spring) time scales. Certain other parameters (moisture balance, surface moisture balance, coefficient of variability of daily precipitation and ratio between evapotranspiration and potential evapotranspiration) were also calculated and related to fire variability for both time scales. Inter-annual time scale was found not to be strong enough to explain fire activity in the region; however, inter-seasonal fire variability showed significant correlation with potential evapotranspiration and with the ratio between evapotranspiration and potential evapotranspiration. The relationship and relative variability between evapotranspiration and the potential evapotranspiration were found to have important effect on inter-seasonal fire variability as compared to the other parameters studied, and link fire activity in the region to large-scale climatic systems. |
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