| 摘要: |
| 基于标准化降水指数（SPI），采用线性趋势分析、滑动平均、空间分析等方法对怀化市1962—2015年气象干旱特征进行分析，结果表明：1962—2015年怀化市年尺度整体干旱频率（轻旱及以上干旱发生频率）为29.6%，中旱频率14.8%，重旱频率5.6%，特旱频率3.7%。1962—2015年怀化市年干旱强度（SPI）在-2.5~1.9之间，年际变化趋势不显著，从四季来看，秋旱最为严重。 |
| 关键词: 气象干旱；SPI；时空特征；干旱评价指标；怀化市 |
| DOI： |
| 投稿时间：2019-02-20 |
| 基金项目:湖南省气象局2018年短平快课题(XQKJ18B027)：怀化市汛期短时强降水时空变化特征及雷达回波分析 |
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| Spatial and temporal characteristics of meteorological drought in Huaihua City based on SPI |
| ZHANG Kun,OU Xiaofeng,WANG Xinfa |
| (Huaihua Meteorological Bureau, Huaihua 418000 ,China) |
| Abstract: |
| Based on the standardized precipitation index (SPI), the meteorological drought characteristics of Huaihua City from 1962 to 2015 were analyzed by means of linear trend analysis, moving average analysis and spatial analysis. The results show that:①the annual overall drought frequency (light drought and above drought frequency) was 29.6%, the moderate drought frequency was 14.8%, the severe drought frequency was 5.6%, and the extraordinary drought frequency was 3.7%. ②From 1962 to 2015, the annual drought intensity (SPI) of Huaihua City ranged from-2.5 to 1.9, with no significant interannual change trend, and autumn drought was the most serious in the four seasons. |
| Key words: meteorological drought； SPI； spatial and temporal characteristics； drought evaluation index； Huaihua City |
