| 蔡新玲，叶殿秀，李茜，张存杰，王娜.基于CI指数的陕西干旱时空变化特征分析[J].干旱地区农业研究,2013,31(5):1~8 |
| 基于CI指数的陕西干旱时空变化特征分析 |
| Analysis of temporal spatial variation characteristics of drought in Shaanxi Province based on compound meteorological drought index (CI) |
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| DOI：10.7606/j.issn.1000-7601.2013.05.001 |
| 中文关键词: 陕西省 综合气象干旱指数（CI） 变化特征 |
| 英文关键词:Shaanxi Province compound meteorological drought index (CI) variation characteristics |
| 基金项目:陕西省气象局重点科研项目（2011Z-7）；陕西省科技研究发展计划项目（2012K12-03-02） |
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| 中文摘要: |
| 利用1961—2010年陕西省72个气象站逐日气温和降水资料，采用综合气象干旱指数法，统计分析了近50年陕西省气象干旱发生的时空分布特征。结果表明：陕西省年及四季干旱发生频次和干旱日数总体上呈北高（多）南低（
少）分布特征。四季中夏旱频率最高，强度最强，春季其次。各等级干旱日数中轻旱日数最多，中、重和特旱日数依次减少。陕北北部长城沿线及关中中东部既是干旱高发区，也是干旱重发区；近50年陕西区域干旱强度和干旱日数均存在较明显的增加趋势，主要表现为春秋两个季节的变化，而夏季和冬季的变化趋势不明显；近50年陕西共发生32起持续性干旱事件，以春夏连旱为主；20世纪90年代中后期至2002年持续性干旱事件发生的频率高，强度强，
反映出陕西区域极端干旱事件对全球气候变化有明显的响应。 |
| 英文摘要: |
| Based on the daily precipitation and temperature data at 72 metrological stations during 1961 to 2010, the characteristics of spatial and temporal distribution of drought in Shaanxi Province were analyzed by using compound meteorological drought index (CI). The results showed that the dist
ribution of frequency and days of yearly and seasonal drought generally appeared to be high in the northern part and low in the southern part. The season with highest drought frequency was summer, followed by spring. Among various grades of drought, the days of slight drought were the largest, and those of moderate, severe and extreme drought decreased successively. The areas along the Great Wall
in Northern Shaanxi and in the middle of Guanzhong Plain are high in both frequency and intensity of drought. An obviously increasing trend was discovered in Shaanxi during last 50 years, which was more remarkable in spring and autumn than in summer and winter. There were 32 times of continuous drought events in Shaanxi during last 50 years, and they were mainly successive spring and summer drough
t. The frequency and intensity of drought events were high from middle 1990s’ to 2002, which reflected that the extreme events in Shaanxi responded to the global climate change. |
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