The potent haze lying over the entire indian subcontinent - - from sri lanka to afghanistan - - has led to some erratic weather , sparking flooding in bangladesh , nepal and northeastern india , but drought in pakistan and northwestern india 这一大片黑压压的烟雾笼罩了从斯里兰卡到阿富汗的整个印度半岛，导致了该地区气候反常，造成的直接恶果是孟加拉、尼泊尔和印度东北部洪水泛滥，相反巴基斯坦和印度西北部却是大旱成灾。
Understanding how these cultures adapted to events like persis tent droughts could provide valuable perspective on how modem societies might respond to future climate change , says peter demenocal , a researcher at the lamont - doherty earth observatory of columbia university 哥伦比亚大学拉蒙特一都荷迪地球天文台的研究员彼得?德曼诺克声称，了解这些文明是如何适应象持续大旱这类事件的，可以提供宝贵的角度来审视现代社会可能会对未来的气候变化作出怎样的反应。
The computed palmer drought index of 124 stations in the north of china are used to analyse some charactersin this region , including the main drouthy years and its severity , the drought range , etc . . we also analyse the main drouthy periods , the frequency of each drought degree , the main area and the drought cycle in northwest china , north china and northeast china . on the base of the further modification of palmer drought severity model , a daily palmer drought severity model are developed . lt indicated that the daily drought index is accordant with the monthly drought index , and can reflect the change of severity in detail 应用进一步修正的帕默尔旱度模式计算的我国北方地区124个站点的40年逐月旱度值，分析了我国北方地区的一些干旱特征，包括北方地区旱情较重的大旱年及其严重程度、主要干旱区；华北、西北和东北地区各等级干旱发生频率、主要干旱时段、干旱周期等，为防旱抗旱提供了科学依据。
On the basis of the drought data in baoji city from 1953 to 1997 , drought climatic characteristics are analyzed : drought mainly occurred in plain , it is the few in mountain , and spring and summer crought is serious ; precipitation cut down by 60 % in big drought year , temperature is high 0 . 7 ~ 3 . 5 than mean over the year 摘要干旱是宝鸡市主要的气象灾害之一，根据宝鸡市1953年~ 1997年11个县站的干旱史料，统计分析得出干旱的时空分布特点是：顺原地区干突出，山区较轻，春夏旱严重，秋冬旱较轻；气候特徵现为：大旱年降水偏少程度减少60 %以上，气温偏高0 . 7 ~ 3 . 6 。
