关键词: 干旱, 气象干旱指数, 监测预测, 适应性

Abstract:

The frequency, intensity and influence region of extreme drought events are increasing under the global warming background, which would lead to not only enormous losses on national economy especially on agricultural production but also profound adverse impacts on water resources shortage, desertification exacerbation and frequent sand storm. In this paper, we focused on meteorological drought, then the spatiotemporal adaptability of commonly-used meteorological drought indices in China were systematically summarized in order to further improve technological level on drought monitoring, predicting, assessing and decision-making services. Firstly, commonly-used meteorological drought indices in China and their characteristics were reviewed in terms of calculation principle and elements, the results indicated that these indices could be classified into two categories: one category just considered precipitation and the other combined multi-factors in calculating. Secondly, adaptability of meteorological drought indices in different regions and seasons were summed up in China. In addition, amendments and improvements of these indices and their application effects were concluded. Furthermore, main factors impacting adaptability of these indices were investigated. Finally, controversial issues in research field of drought were proposed and key scientific problem which needed to be dealt with and development tendency were discussed on study area of meteorological drought indices and their adaptability in further.

Key words: drought, meteorological drought indices, monitoring and predicting, adaptability