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| PDSI和Z指数在西北干旱监测应用中差异性分析 | |
| 引用本文： | 唐红玉,王志伟,史津梅,杨兴国.PDSI和Z指数在西北干旱监测应用中差异性分析[J].干旱地区农业研究,2009,27(5):6-11. |
| 作者姓名： | 唐红玉 王志伟 史津梅 杨兴国 |
| 作者单位： | 1. 中国气象局兰州干旱气象研究所,甘肃,兰州,730001;重庆市气候中心,重庆,401147 2. 山西省卫星遥感减灾服务中心,山西,太原,030002 3. 青海省气象台,青海,西宁,810001 4. 中国气象局兰州干旱气象研究所,甘肃,兰州,730001 |
| 基金项目： | 兰州干旱气象科学研究基金项目 |
| 摘 要： | 利用西北地区137个气象台站1961～2003年气象资料,分别计算了西北地区的Z和PDSI两种干旱指数,并对其结果进行了对比分析.结果认为:两种指数在多数地区多数季节可以互相兼容,但Z指数适宜于在雨季表征干湿事件,而PDSI则适宜于西北的所有地区和所有季节,并对当地干旱事件的反映更为敏感;在对不同程度干旱面积的表征上,PDSI对轻旱的表征反映较为敏感,而Z指数对重旱的反映更为敏感;对于中等程度的干旱而言,两种指数表征下的干旱面积较为统一;从西北地区的实际情况出发,PDSI对干旱的表征更为客观. |
| 关 键 词： | PDSI指数 Z指数 西北干旱监测 差异分析 |
Analysis of different dryness/wetness index in Northwest China |
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| TANG Hongyu,WANG Zhiwei,SHI Jinmei,YANG Xingguo.Analysis of different dryness/wetness index in Northwest China[J].Agricultural Research in the Arid Areas,2009,27(5):6-11. | |
| Authors: | TANG Hongyu WANG Zhiwei SHI Jinmei YANG Xingguo |
| Institution: | TANG Hong-yu1,2,WANG Zhi-wei3,SHI Jin-mei4,YANG Xing-guo1(1.Institute of Arid Meteorology,China Meteorological Administration,Lanzhou,Gansu 730001,China,2.Qinghai Climate Center,Xining,Qinghai 810001,3.Qinghai Meteorological Observatory,4.Shanxi Satellite Remote-Sensing Center for Reducing Disasters,Taiyuan,Shanxi 030002,China) |
| Abstract: | Based on analysis of the meteorological data at 137 meteorological stations in Northwest China from 1961 to 2003,the corrected Palmer drought severity index(PDSI) and Z index were calculated and analyzed.The results showed that the Z index was more condign than PDSI in monsoon,while the PDSI is more objective and hypersensitive in comparison with Z index in dryness monitoring in the Northwest.The PDSI is more hypersensitive in light dryness monitoring in the Northwest,but the Z index is more hypersensitive ... |
| Keywords: | PDSI index Z index Northwest China analysis of drought |
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