Convenient method of calculation and application of median temperature and aridity index Comprehensive research on the state of agricultural drought in five main grain producing areas in China The Effect of Climate Change on the Climatic Zoning for Wine Grapes in China Assessing the sensitivity of China water condition to global climate changes ARIDITY INDEX AND ITS APPLICATIONS IN GEO-ECOLOGICAL STUDY The Effect of Climate Change on the Climatic Zoning for Wine Grapes in China