In this paper firstly the severity and complexity of aridity disaster among variety of natural disasters are stated; then the advances in some aspects of arid climate researches over Northwest China in past 20 years, such as its distribution features, for
In this paper firstly the severity and complexity of aridity disaster among variety of natural disasters are stated; then the advances in some aspects of arid climate researches over Northwest China in past 20 years, such as its distribution features, for
摘要首先阐述了自然灾害中干旱灾害的严重性和复杂性；接着从西北干旱气候的时空分布特征、形成原因、干旱气候的比较以及监测和预测等方面回顾了近20年来我国西北干旱气候研究的进展；最后提出了西北干旱气候待研究的问题。