基于SPEI指数的淮北地区气象干旱时空特征研究
【目的】研究淮北地区1961—2022年气象干旱时空特征。【方法】采用淮北地区21个站点1961—2022年实测气象资料，计算月、季、年尺度各站点及区域平均标准化降水蒸散指数（SPEI），分析该区干旱发生频次、干旱趋势及干旱发生强度时空变化特征。【结果】①1961—2022年淮北地区月、季、年尺度SPEI呈下降趋势。②月尺度干旱场次及干旱平均持续时间呈逐年上升趋势，淮北站年均干旱场次最多（0.73次/年），泗县站干旱平均持续时间最长（4.61 月/次），淮北站月尺度干旱风险最高。③春季、秋季呈不显著干旱化趋势，夏季、冬季呈不显著湿润化趋势；冬季干旱频率和干旱发生强度最高，分别为34.43%、2...
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| Published in | Guanʻgai paishui xuebao Vol. 43; no. 2; pp. 67 - 77 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese English |
| Published |
Xinxiang City
Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
01.02.2024
河海大学,南京 210098%安徽省(水利部淮委)水利科学研究院 五道沟水文实验站,合肥 230088 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-3317 |
| DOI | 10.13522/j.cnki.ggps.2023256 |
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| Abstract | 【目的】研究淮北地区1961—2022年气象干旱时空特征。【方法】采用淮北地区21个站点1961—2022年实测气象资料，计算月、季、年尺度各站点及区域平均标准化降水蒸散指数（SPEI），分析该区干旱发生频次、干旱趋势及干旱发生强度时空变化特征。【结果】①1961—2022年淮北地区月、季、年尺度SPEI呈下降趋势。②月尺度干旱场次及干旱平均持续时间呈逐年上升趋势，淮北站年均干旱场次最多（0.73次/年），泗县站干旱平均持续时间最长（4.61 月/次），淮北站月尺度干旱风险最高。③春季、秋季呈不显著干旱化趋势，夏季、冬季呈不显著湿润化趋势；冬季干旱频率和干旱发生强度最高，分别为34.43%、21.86%；夏季局域性及其以上干旱频率最高；冬季全域性及其以上干旱频率最高；中东部及西南部春季干旱频率较高，东南部夏季干旱频率较低，东部和北部秋季干旱频率较高，西部和东北部、东南部边缘地区冬季干旱频率较高。④年尺度淮北地区呈不显著干旱化趋势（-0.01/10 a），干旱站次比逐年增加（1.4%/10 a）；北部干旱化倾向较高，西部及东南部干旱发生强度较高，东北部及西南部干旱频率较高。【结论】淮北地区整体呈干旱化趋势，区域间干旱频率、干旱发生强度差异明显。 |
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| AbstractList | P429; [目的]研究淮北地区 1961-2022年气象干旱时空特征.[方法]采用淮北地区 21个站点 1961-2022年实测气象资料,计算月、季、年尺度各站点及区域平均标准化降水蒸散指数(SPEI),分析该区干旱发生频次、干旱趋势及干旱发生强度时空变化特征.[结果]①1961-2022年淮北地区月、季、年尺度SPEI呈下降趋势.②月尺度干旱场次及干旱平均持续时间呈逐年上升趋势,淮北站年均干旱场次最多(0.73 次/年),泗县站干旱平均持续时间最长(4.61 月/次),淮北站月尺度干旱风险最高.③春季、秋季呈不显著干旱化趋势,夏季、冬季呈不显著湿润化趋势;冬季干旱频率和干旱发生强度最高,分别为 34.43%、21.86%;夏季局域性及其以上干旱频率最高;冬季全域性及其以上干旱频率最高;中东部及西南部春季干旱频率较高,东南部夏季干旱频率较低,东部和北部秋季干旱频率较高,西部和东北部、东南部边缘地区冬季干旱频率较高.④年尺度淮北地区呈不显著干旱化趋势(-0.01/10 a),干旱站次比逐年增加(1.4%/10 a);北部干旱化倾向较高,西部及东南部干旱发生强度较高,东北部及西南部干旱频率较高.[结论]淮北地区整体呈干旱化趋势,区域间干旱频率、干旱发生强度差异明显. 【目的】研究淮北地区1961—2022年气象干旱时空特征。【方法】采用淮北地区21个站点1961—2022年实测气象资料，计算月、季、年尺度各站点及区域平均标准化降水蒸散指数（SPEI），分析该区干旱发生频次、干旱趋势及干旱发生强度时空变化特征。【结果】①1961—2022年淮北地区月、季、年尺度SPEI呈下降趋势。②月尺度干旱场次及干旱平均持续时间呈逐年上升趋势，淮北站年均干旱场次最多（0.73次/年），泗县站干旱平均持续时间最长（4.61 月/次），淮北站月尺度干旱风险最高。③春季、秋季呈不显著干旱化趋势，夏季、冬季呈不显著湿润化趋势；冬季干旱频率和干旱发生强度最高，分别为34.43%、21.86%；夏季局域性及其以上干旱频率最高；冬季全域性及其以上干旱频率最高；中东部及西南部春季干旱频率较高，东南部夏季干旱频率较低，东部和北部秋季干旱频率较高，西部和东北部、东南部边缘地区冬季干旱频率较高。④年尺度淮北地区呈不显著干旱化趋势（-0.01/10 a），干旱站次比逐年增加（1.4%/10 a）；北部干旱化倾向较高，西部及东南部干旱发生强度较高，东北部及西南部干旱频率较高。【结论】淮北地区整体呈干旱化趋势，区域间干旱频率、干旱发生强度差异明显。 |
| Abstract_FL | [Objective]Drought is an abiotic stress detrimentally affecting crop production in many countries.Understanding its occurrence in a region is crucial to improving its water and agricultural management.In this paper,we analyzed the spatiotemporal variation in drought from 1961-2022 in Huaibei located in central China.[Method]The analysis is based on meteorological data measured from 1961-2022 from 21 weather stations across the region.Monthly,seasonal,and annual standardized precipitation evapotranspiration index(SPEI)in each station were calculated,from which we calculated the spatiotemporal variation in drought across the region.[Result]① Monthly,seasonal and annual SPEI in Huaibei had been in decrease from 1961-2022.② The frequency and duration of persistent droughts had both been in increase from 1961-2022,with Huaibei station showing the highest drought frequency at 0.73 times/year,and Sixian station showing the longest drought duration at 4.61 months.③ Annual change in droughts in spring and autumn did not show any identifiable trend.Frequency and intensity of droughts in winter were the highest,reaching 34.43%and 21.86%,respectively.Spatially,spring drought was more frequent in the center,east,and southwest of the region;summer drought was less frequent in the southeast of the region;autumn drought was more frequent in the east and north of the region;winter drought was more frequent in the west,northeast and southeast of the region.④ On average,annual change in drought was increasing at a rate of 0.01/10 a,but not at significant levels.Drought areas had been in increase from 1961 to 2022 at a rate of 1.4%/10 a.The north has a high tendency for occurrence of droughts,while drought intensity tends to be high in the west and southeast of the region.Drought is more frequent in the northeast and southwest.[Conclusion]Overall,there are noticeable trends in spatiotemporal variation in drought in the Huaibei region,with drought frequency and intensity varying between different regions and showing an increase trend from 1961 to 2022. |
| Author | LI, Jie CHEN, Yu CHEN, Xiaofeng ZHANG, Qibing JIANG Xinping LYU Haishen WANG Zhenlong |
| AuthorAffiliation | 河海大学,南京 210098%安徽省(水利部淮委)水利科学研究院 五道沟水文实验站,合肥 230088 |
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| Author_FL | CHEN Yu CHEN Xiaofeng ZHANG Qibing JIANG Xinping LYU Haishen LI Jie WANG Zhenlong |
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| Keywords | standardized precipitation evapotranspiration index drought characteristics 气象干旱 淮北地区 标准化降水蒸散指数 meteorological drought Huaibei area 干旱特征 |
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| Snippet | ... P429; [目的]研究淮北地区 1961-2022年气象干旱时空特征.[方法]采用淮北地区 21个站点... |
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| SubjectTerms | Agricultural management Annual precipitation Autumn Crop production Drought Evapotranspiration Frequency variation Meteorological data Precipitation Spatiotemporal data Spring Spring (season) Trends Variation Weather stations Winter |
| Title | 基于SPEI指数的淮北地区气象干旱时空特征研究 |
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