Agricultural drought hazard analysis during 1980–2008: a global perspective

摘要: Various studies have been performed on drought hazard assessment at the national or regional scales, but few to date global scale, especially agriculture. In this paper, we utilized an agricultural index (DHI), based both severity and occurrence rate, derived from 3-month scale Standardized Precipitation Index (SPI) phenology data of main crops (rice, maize, wheat, barley, sorghum soybean) assess grades world during 1980–2008. The results indicated that area percentages high very zones were approximately 23.57 27.19% total in world. Moreover, those mostly distributed central United States, southeastern South America, most Europe, southwestern Russia, southern Congo Nigeria, east-central southwest China, Southeast Asia eastern Australia, areas also located semi-humid humid climate zones. addition, some regions above found be for crops: East-central China rice soybean; Europe maize barley; rice; States America soybean sorghum.