| 标准化降水蒸发指数在中国区域的应用 |
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| 引用本文： | 庄少伟,左洪超,任鹏程,熊光洁,李邦东,董文成,王利盈.标准化降水蒸发指数在中国区域的应用[J].气候与环境研究,2013,18(5):617-625. |
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| 作者姓名： | 庄少伟 左洪超 任鹏程 熊光洁 李邦东 董文成 王利盈 |
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| 作者单位： | 兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;中国人民解放军94923部队气象台, 武夷山 354301;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000;兰州大学大气科学学院, 半干旱气候变化教育部重点研究室, 兰州 730000 |
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| 基金项目： | 国家重大科学研究计划2012CB956200;公益性行业(气象)科研专项GYHY201106043;国家自然科学基金41075006 |
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| 摘 要： | 利用中国气象局160个站1951～2010年月降水和月平均气温资料,分析了最近定义的一种干旱指数——标准化降水蒸发指数(SPEI)在我国不同等级降水区域的适用性,并与标准化降水指数(SPI)和湿润指数H进行了对比分析。结果表明:1)在我国年均降水量大于200 mm的地区,各种时间尺度的SPEI分析均适用;在干旱区(年均降水量小于200 mm),只有12个月以上的大尺度SPEI分析适用性较好;其中12个月尺度的SPEI分析在各区适用性最好。2)由于干旱区冬季的潜在蒸发量和降水量0值均较多,导致1、3、6个月的小尺度SPEI分析在该区不适用。3)与SPI和H指数相比,SPEI既能充分反映1997年气温跃变以后增温效应对干旱程度的影响,又可作为监测指数识别干旱是否发生和结束,能较准确地表征干旱状况。
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| 关 键 词： | 标准化降水蒸发指数(SPEI) 干旱 干旱指数 全球变暖 适用性 |
| 收稿时间： | 2012/1/10 0:00:00 |
| 修稿时间： | 2012/10/10 0:00:00 |
Application of Standardized Precipitation Evapotranspiration Index in China |
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| ZHUANG Shaowei,ZUO Hongchao,REN Pengcheng,XIONG Guangjie,LI Bangdong,DONG Wencheng and WANG Liying.Application of Standardized Precipitation Evapotranspiration Index in China[J].Climatic and Environmental Research,2013,18(5):617-625. |
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| Authors: | ZHUANG Shaowei ZUO Hongchao REN Pengcheng XIONG Guangjie LI Bangdong DONG Wencheng and WANG Liying |
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| Institution: | Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;No. 94923 Army of PLA Meteorological Observatory, Wuyishan 354301;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;Key Laboratory for Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000 |
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| Abstract: | Applicability of the standardized precipitation evapotranspiration index (SPEI) is examined on the basis of monthly precipitation and monthly-mean temperature data recorded by 160 stations in China from 1951 to 2010. Results indicate that the SPEI at multiple time scales can be used to examine drought in areas with annual precipitation greater than 200 mm. In other regions, the index is effective for time scales longer than 12 months. In addition, the lack of precipitation and evapotranspiration during winter months results in reduced confidence of SPEI values when applying 1-, 3-, and 6-month SPEIs in arid climatic regimes with annual precipitation less than 200 mm. Moreover, time series of SPEI, standardized precipitation index (SPI), and H index were compared for two observatories with different climate characteristics located in various regions of China. Of the three indices, only the SPEI was able to identify an increase in drought severity associated with higher water demand as a result of evapotranspiration under global warming. Further, the SPEI was able to determine the beginning and end of drought events. Therefore, SPEI carries an advantage when used for drought analysis and monitoring. |
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| Keywords: | Standardized precipitation evapotranspiration index Drought Drought index Global warming Applicability |
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