摘要
本文综合分析中国北方风沙活动发展的趋势，从气候变化、地表植被覆盖变化和土地利用变化等方面阐述了中国北方风沙灾害加剧的原因，指出气候变化和土地利用一覆盖变化是中国北方风沙活动的主要驱动力因素。
The increase of blown-sand activities in northern China becomes a natural disaster. The cause of rapid expansion of blown-sand disaster has been comprehensively analyzed. It seems that the main reason of the expansion is land cover changes caused by man-made variation of land use in the flame of global climatic changes. According to the trend of blown-sand activities, more attention should be paid to the issues as follows: (1) Whether the abnormality of the climatic events (such as EI Nino) results in the increasing of windy days in northern China and will further increase such Phenomena in the future? (2) Is it possible to find some anthropogenic methods in order to decrease severe and extremely severe dust storms? (3) Due to global warming,variations of precipitation in late winter and early spring will Probably change the frequency, intensity and spatial distribution of blown-sand activities. (4) The effect of increasing contradiction of water uses in natural ecosystem and in human economical and daily lives to the further evolution of blown-sand activities. Intensive studies of these issues are absolutely necessary in order to diminish the blown-sand disaster.
出处
《第四纪研究》
CAS
CSCD
北大核心
2001年第1期41-47,共7页
Quaternary Sciences
基金
国家重点基础研究发展规划项目!(批准号:G2000018604)
