WEI Wei,YAN Xiaoqiang,DONG Xuefeng,et al.Air Water Resource Characteristics in the Sichuan Chongqing Region from 2000 to 2020 based on Satellite and Reanalysis Data[J].Journal of Chengdu University of Information Technology,2025,40(04):511-517.[doi:10.16836/j.cnki.jcuit.2025.04.016]
基于卫星和再分析资料的2000-2020年川渝地区空中水资源特征
- Title:
- Air Water Resource Characteristics in the Sichuan Chongqing Region from 2000 to 2020 based on Satellite and Reanalysis Data
- 文章编号:
- 2096-1618(2025)04-0511-07
- Keywords:
- Sichuan Chongqing region; cloud water resources; water vapor transportation; spatial distribution; seasonal variation
- 分类号:
- P426.5
- 文献标志码:
- A
- 摘要:
- 为科学设计飞机增雨作业方案,提高催化作业效率,利用2000-2020年欧洲中期天气预报中心发布的第五代再分析资料(ERA5)和全球降水测量计划卫星(GPM)提供的高分辨率逐小时降水数据对2000-2020年川渝地区空中水资源特征等进行研究。结果表明,川渝地区20 a年平均降水量时空分布不均匀,空间上呈东多西少的分布特征,季节上夏季降水最多为503.4 mm,冬季降水量最少仅25.5 mm。大气可降水量时空分布特征与降水一致,年平均值为6591.9 kg·m-2,平均空中水汽资源总量约为32037×108 t。川渝地区年平均降水效率为40%,其中中东部地区降水效率相对较低,冬季在7%以下,春、秋季在12%以下,夏季在12%～20%。川渝地区全年水汽为净输入,年平均输入值为48.7 kg·s-1,其中川渝地区西风和南风水汽输送影响最为显著,有利于川渝地区上空较高的水资源维持。
- Abstract:
- In order to scientifically design aircraft rain enhancement operation plans and improve catalytic operation efficiency,the fifth generation reanalysis data(ERA5)released by the European Medium Range Weather Forecast Center from 2000 to 2020 and high-resolution hourly precipitation data provided by the Global Precipitation Measurement Program(GPM)satellite were used to discuss and study the characteristics of air water resources in the Sichuan Chongqing region from 2000 to 2020.The results show that the spatiotemporal distribution of the average precipitation in the Sichuan Chongqing region over the past 20 years is uneven,with a distribution pattern of more in the east and less in the west.The maximum precipitation in summer is 503.4 mm,and the minimum precipitation in winter is only 25.5 mm.The spatiotemporal distribution characteristics of atmospheric precipitation are consistent with precipitation,with an annual average of 6591.9 kg·m-2 and an average total amount of air water vapor resources of about32037×108 t.The annual average precipitation efficiency in the Sichuan Chongqing region is 40%,with the precipitation efficiency in the central and eastern regions relatively low,below 7% in winter,below 12% in spring and autumn,and between 12%-20% in summer.The annual water vapor input in the Sichuan Chongqing region is net,with an average input value of 48.7 kg·s-1.Among them,the westerly and southerly water vapor transport in the Sichuan Chongqing region has the most significant impact,which is conducive to maintaining higher water resources over the region.
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备注/Memo
收稿日期:2024-04-30
通信作者:严晓强.E-mail:2353162416@qq.com