| 内蒙古典型草原区域Palmer气象干旱指数适用性分析 |
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| 引用本文： | 李雁.内蒙古典型草原区域Palmer气象干旱指数适用性分析[J].气象科学,2019,39(5):626-634. |
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| 作者姓名： | 李雁 |
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| 作者单位： | 中国气象局 气象探测中心, 北京 100081 |
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| 基金项目： | 中国气象局气象探测中心自筹基金资助项目（TCZS201802） |
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| 摘 要： | 本研究选取我国内蒙古典型草原下垫面区域,进行PDSI在半干旱半湿润典型草原下垫面下的适用性分析。从各单点PDSI结果与区域平均PDSI的相关性结果以及PDSI与降水距平百分率、标准化降水蒸散指数、归一化植被指数以及实际干旱记载对比分析可以看出,PDSI结果与其余各干旱指标对比分析结果无论在时间趋势的一致性还是空间分布的吻合程度方面均很好的对应,说明PDSI在典型草原下垫面区域具有较好适用性,能很好反映此类下垫面状况下的干湿状况;同时,PDSI在指示频繁交替的旱涝时存在时间滞后性。研究结果可为PDSI在类似区域的精细化应用及在其余下垫面状况下的适用性分析提供参考。
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| 关 键 词： | 内蒙古 典型草原 下垫面 PDSI 适用性 对比分析 |
| 收稿时间： | 2018/3/6 0:00:00 |
| 修稿时间： | 2018/7/2 0:00:00 |
The Palmer drought severity index applicability analysis in typical grassland underlying surface area of Inner Mongolia |
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| LI Yan.The Palmer drought severity index applicability analysis in typical grassland underlying surface area of Inner Mongolia[J].Scientia Meteorologica Sinica,2019,39(5):626-634. |
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| Authors: | LI Yan |
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| Institution: | Meteorological Observation Center of China Meteorolgical Administration, Beijing 100081, China |
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| Abstract: | This study selected the typical steppe of Inner Mongolia surface area analyzed the applicability of PDSI in semi-arid and semi-humid steppe surface. From the correlation results between the PDSI results of each single point and the regional average PDSI, as well as the comparative analysis between the PDSI and the precipitation anomaly percentage, the standardized precipitation evapotranspiration index, the normalized vegetation index and the actual drought records, it can be seen that the PDSI results and the comparative analysis results of other drought indicators have good correspondence in terms of the consistency of time trend and the consistency of spatial distribution, indicating that PDSI in the typical grassland surface area has good applicability, can well reflect the drought conditions under such the surface condition. And PDSI has time lag when indicating frequent alternate of droughts and floods. The research results can provide reference for the fine application of PDSI in similar areas and the remaining surface condition under analysis. |
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| Keywords: | Inner Mongolia typical grassland underlying surface PDSI applicability comparison and analysis |
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