摘要
以黄淮海平原为研究区,基于59个气象站点的逐月降水数据,采用相关系数(R)、相对误差(BIAS)和均方根误差(RMSE)对TRMM 3B43降水产品的精度进行系统评估,揭示黄淮海平原降水的时空变化规律。研究表明:(1) TRMM 3B43产品对研究区内大部分气象站点存在轻微高估现象,总体上TRMM产品和站点数据在黄淮海平原的拟合效果较好,且月尺度的精度较年尺度高;(2) 1998—2016年黄淮海平原年降水和秋季降水增加明显,其余季节降水呈不同程度的减少趋势;(3)研究区降水在空间上呈从南到北递减的趋势,且南北降水差距较大。研究结果为卫星降水产品在中纬度地区水资源评估、农业生产和洪旱灾害等研究提供一定的参考。
Accurate precipitation data are crucial for flood forecasting, drought monitoring and related emergency management. Therefore, how to obtain accurate precipitation data with good spatial and temporal resolution is one of the great challenges in the world. The Tropical Rainfall Measurement Satellite(TRMM) is the first satellite to measure precipitation. TRMM can well estimate the temporal and spatial distribution of precipitation;however, its accuracy and applicability in the mid-latitude area are worth studying. Therefore, this study aims to evaluate the accuracy of TRMM 3 B43 product and analyze the temporal and spatial characteristics of precipitation in the Huang-Huai-Hai Plain during 1998-2016, using monthly precipitation data from 59 meteorological stations. And TRMM 3 B43 product is validated adopting correlation coefficient(R), relative error(BIAS) and root mean square error(RMSE). The results show that: 1) On the annual and monthly scales,TRMM 3 B43 product fits well with the meteorological station data, with R of 0.926 and 0.930(P<0.01), respectively. 2) TRMM 3 B43 overestimates the precipitation for 88% of the stations;the relative error is between-7% and 10% for 66% of the stations. The error of spatial distribution is uneven, and it is higher in the southeast than that in the central and northern regions. 3) During 1998 to 2016, the average annual precipitation shows an increasing trend in the Huang-Huai-Hai Plain. In addition, the precipitation shows an increasing trend in autumn, presenting decreasing trend in other seasons. Moreover, the precipitation presents the most obvious decreasing trend in summer. The annual precipitation is mainly concentrated in the warm season(April-October), accounting for about 86% of the total year. The precipitation accounts for about 1/4 of the year in July.4) Dependented on latitude, precipitation gradually decreases from the south to the north. Among them, abundant precipitation is occurred in southern Henan, Anhui, and Jiangsu, while with less average annual preci
作者
郭斌
邢文雪
李云
赵佳琪
冯凯月
黄壮壮
Guo Bin;Xing Wenxue;Li Yun;Zhao Jiaqi;Feng Kaiyue;Huang Zhuangzhuang(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;College of Global Change and Earth System Science,Beijing Normal University,Beijing 100875,China;Academy of Disaster Reduction and Emergency Management,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,Jiangsu,China;Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China)
出处
《地理科学》
CSSCI
CSCD
北大核心
2021年第7期1285-1294,共10页
Scientia Geographica Sinica
基金
国家自然科学基金项目(41807170)
山东省重大科技创新工程项目(2019JZZY020103)
山东省高等学校青创人才引育计划(卫星定位导航研究创新团队)资助。
关键词
黄淮海平原
TRMM
3B43
精度验证
降水
the Huang-Huai-Hai Plain
TRMM 3B43
accuracy verification
precipitation
