西北师范大学地理与环境科学学院,甘肃,兰州,730070
纸质出版:2014
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任培贵, 张勃, 张调风, 等. 基于SPEI的中国西北地区气象干旱变化趋势分析[J]. 水土保持通报, 2014,33(1):182-187.
REN Pei-gui, ZHANG Bo, ZHANG Tiao-feng, et al. Trend Analysis of Meteorological Drought Change in Northwest China Based on Standardized Precipitation Evapotranspiration Index[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 182-187.
任培贵, 张勃, 张调风, 等. 基于SPEI的中国西北地区气象干旱变化趋势分析[J]. 水土保持通报, 2014,33(1):182-187. DOI: 10.13961/j.cnki.stbctb.2014.01.010.
REN Pei-gui, ZHANG Bo, ZHANG Tiao-feng, et al. Trend Analysis of Meteorological Drought Change in Northwest China Based on Standardized Precipitation Evapotranspiration Index[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 182-187. DOI: 10.13961/j.cnki.stbctb.2014.01.010.
中国西北地区深居欧亚大陆腹地
是同纬度最干旱的地区之一
如果持续干旱
将对该地区社会经济发展产生严重的影响。因此
深入研究西北地区的干旱特征
为制定改善生态环境
促进西北经济发展有着重要的意义。标准化降水蒸散指数(SPEI)将温度对蒸散的影响融合在内
是全球气候变暖背景下研究干旱的新理想指标。采用1959-2011年西北地区149个具有代表性的气象站点的资料
对西北地区近53 a干旱时空变化进行分析。结果表明
西北地区普遍存在干旱现象。从年际变化来看
该区呈变干趋势
1996年发生突变。从季节的变化来看
春、夏、秋明显变干
冬季有变湿趋势
变湿趋势不明显。春、夏、秋季发生突变
冬季突变不明显。从空间变化来看
春、夏秋大部分地区呈变干趋势
冬季大部分呈变湿趋势。与年鉴资料对比的结果进一步证明SPEI指数在西北地区具有较好的适用性。
Northwest China lies in the Eurasia hinterland
which is one of the driest regions as compared with the areas in the same latitude. If drought persists
it will have a severe impact on social and economic development of the northwest region. Therefore
study of drought characteristics in Northwest China is of great significance to the eco-environment improvement and the promotion of economic development in the region. Standardized precipitation evapotranspiration index(SPEI) combining the influence of temperature on evapotranspiration is a new ideal indicator in the research on drought under the background of global warming. The data from 149 representative meteorological stations in Northwest China in 1959-2011 were used to analyze the temporal and spatial variation of drought. Results showed that drought was a universally existed fact in the northwest. From the inter-annual perspective
the region showed a drought trend with an abrupt change in 1996. Form the seasonal changes
the weather became drought in spring
summer and autumn
and had a humid tend in winter
which is not obvious. Worsening trend occurred in spring
summer and autumn
but was not obvious in winter. Spatially
most regions had a drought trend in spring and summer and a humid tend in winter. Compared with almanac data
SPEI
as a drought index
is confirmed to be applicable in Northwest China.
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