| RDI指数在新疆5个地区干旱监测的应用 |
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| 引用本文： | 王乃哲,景元书,徐向华,Hanggoro Wido.RDI指数在新疆5个地区干旱监测的应用[J].干旱区地理,2020,43(1):99-107. |
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| 作者姓名： | 王乃哲 景元书 徐向华 Hanggoro Wido |
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| 作者单位： | 1 气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室，江苏南京210044；
2 南京信息工程大学应用气象学院，江苏南京210044 |
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| 基金项目： | 国家自然科学基金项目（41575111）；江苏省六大人才高峰项目（NY-038）；高校优势学科建设工程项目（PAPD） |
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| 摘 要： | 为加强新疆地区干旱动态监测与评估，基于阿勒泰、伊宁、乌鲁木齐、和田、哈密5个气象站近49 a的逐日降水与蒸散数据，采用计算简单、敏感性与稳定性较强的RDI指数分析了5个地区季尺度以及年尺度的干旱特征，并指出了未来新疆地区干旱评估的发展方向。结果表明：（1） 5个地区在年尺度和4个季尺度上的干旱强度与频率略有差异，但干旱程度均有所下降，都存在湿润化趋势，乌鲁木齐湿润化程度最高，和田地区湿润化程度最低。（2） 从季节上看，阿勒泰地区夏、秋两季湿润化程度较高，春、冬两季湿润化程度较低；伊宁和乌鲁木齐两地夏、冬两季湿润化较明显，春、秋两季湿润化程度较低；和田、哈密两地春、夏、秋三季都比冬季湿润化程度高。
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| 关 键 词： | 新疆 干旱侦测指数RDI 干旱 多时间尺度 |
| 收稿时间： | 2019-04-24 |
Application of RDI index in drought monitoring of five regions in Xinjiang |
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| WANG Nai-zhe,JING Yuan-shu,XU Xiang-hua,HANGGORO Wido.Application of RDI index in drought monitoring of five regions in Xinjiang[J].Arid Land Geography,2020,43(1):99-107. |
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| Authors: | WANG Nai-zhe JING Yuan-shu XU Xiang-hua HANGGORO Wido |
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| Affiliation: | 1 Collaborative Innovation
Center of Meteorological Disaster Forecasting Warning and Assessment/Key
Laboratory of Agricultural Meteorology in Jiangsu,Nanjing 210044,Jiangsu,China;2.College
of Applied Meteorology,Nanjing University of Information Science &
Technology,Nanjing 210044,Jiangsu,China |
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| Abstract: | Drought is a regional
phenomenon in which the available water is below normal level on a certain time
scale. The basic characteristics of drought are high
frequency, long duration, and wide range of
influence. Xinjiang is a typical
arid and semi-arid region of China. Under the background of global warming, the loss of drought disasters in Xinjiang has shown a
trend of expansion. In order to
strengthen drought monitoring and assessment in Xinjiang, the RDI index
was used to analyze the drought characteristics on seasonal scale and annual
scale based on the daily precipitation and evapotranspiration data of five
meteorological stations in Altay, Yining, Urumqi, Hetian and Hami
Prefectures in Xinjiang. The RDI index is simple to calculate, sensitive to drought, and has strong stability. The paper analyzed the intensity, frequency, time and trend of drought in the five regions. Finally the direction of drought assessment in
Xinjiang was pointed out which should be developed to forecast in order to
reduce the loss of drought in Xinjiang. The results showed that the drought intensity and
frequency of the five regions on the annual scale and the four seasonal scales
were slightly different, but there were
different degrees of humidification. Urumqi City had the highest degree of humidification
and Hetian Prefecture had the lowest degree of humidification. From the seasonal point of view，the degree of humidification in the summer and autumn
in Altay region was higher, but lower in spring
and winter. The humidification in
both Yining and Urumqi was more obvious in summer and winter but lower in
spring and autumn. The humidification in
spring, summer and autumn seasons in Hetian and Hami were
higher than that in winter. |
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| Keywords: | Xinjiang reconnaissance drought index (RDI) drought different time scales |
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