TRMM 3B43卫星降水数据在京津冀地区的适用性研究
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摘要
以京津冀地区为研究区域,利用散点斜率法、相对偏差、均方根误差和相关系数法,对研究区域内176个国家级雨量站2006-2015年的实测降水资料在不同时空尺度下检验了同期TRMM(Tropical Rainfall Measurement Mission)卫星降水产品3B43 V7的适用性。结果表明:TRMM 3B43多年均降水量与站点实测降水时空分布规律一致,在不同时间尺度下具有良好的相关性,相关系数均在0.85以上,随时间尺度的增加精度有所降低;整体上TRMM 3B43降水数据略小于站点实测降水,在常年降水高值区域出现低估现象,季尺度上,夏季和冬季误差较大;就区域而言, TRMM 3B43在西北山地高原地区相对偏差和均方根误差均较小,相关系数基本在0.9以上,拟合精度较高,可信度较强。
Based on the precipitation data observed from 176 national benchmark climate stations and principal stations in Beijing-Tianjin-Hebei Region, the accuracy of the TRMM(Tropical Rainfall Measuring Mission Satellite) 3 B43 V7 rainfall product is tested and analyzed with slope of scatter, relative deviation, root mean square error and correlation coefficient. The results show that the mean precipitation of TRMM 3 B43 is consistent with the observed precipitation, and has a good correlation in different time scales. The correlation coefficients are all above 0.85, and the precision decreases with the increase of time scales. The precipitation of TRMM 3 B43 is slightly smaller than the observed precipitation of the stations on the whole. The phenomenon of underestimation occurs in the regions with high annual precipitation. In seasonal scale, the precision is lower in summer and winter. Regionally, the relative deviation and root mean square error of TRMM 3 B43 in the northwest mountainous and plateau regions are smaller, the correlation coefficient is basically above 0.9, the fitting accuracy is higher with strong credibility.
Based on the precipitation data observed from 176 national benchmark climate stations and principal stations in Beijing-Tianjin-Hebei Region, the accuracy of the TRMM(Tropical Rainfall Measuring Mission Satellite) 3 B43 V7 rainfall product is tested and analyzed with slope of scatter, relative deviation, root mean square error and correlation coefficient. The results show that the mean precipitation of TRMM 3 B43 is consistent with the observed precipitation, and has a good correlation in different time scales. The correlation coefficients are all above 0.85, and the precision decreases with the increase of time scales. The precipitation of TRMM 3 B43 is slightly smaller than the observed precipitation of the stations on the whole. The phenomenon of underestimation occurs in the regions with high annual precipitation. In seasonal scale, the precision is lower in summer and winter. Regionally, the relative deviation and root mean square error of TRMM 3 B43 in the northwest mountainous and plateau regions are smaller, the correlation coefficient is basically above 0.9, the fitting accuracy is higher with strong credibility.
引文
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[2] Wang Xiaojie.Downscaling method and spatial variability of precipitation in Tianshan Mountain based on the TRMM date[D].Shihezi:Shihezi University,2013.[王晓杰.基于TRMM的天山山区降水降尺度方法及其空间变异特征研究[D].石河子:石河子大学,2013.]
[3] Cai Xiaohui,Zou Songbing,Lu Zhixiang,et al.Evaluation of TRMM monthly precipitation data over the inland river basins of Northwest China[J].Journal of Lanzhou University (Natural Sciences),2013,49(3):291-298.[蔡晓慧,邹松兵,陆志翔,等.TRMM月降水产品在西北内陆河流域的适应性定量分析[J].兰州大学学报(自然科学版),2013,49(3):291-298.]
[4] Cheng Ke,Zhu Zhen,Li Ming,et al.Application and accuracy testing of TRMM 3B43 rainfall product in Tibetan region[J].Water Resources and Hydropower Engineering,2014,45(1):44-46.[程珂,朱祯,李铭,等.TRMM 3B43降水产品在西藏地区的精度检验和应用[J].水利水电技术,2014,45(1):44-46.]
[5] Wu Xuejiao,Yang Meixue,Wu Hongbo,et al.Verifying and applying the TRMM TMPA in Heihe River basin[J].Journal of Glaciology and Geocryology,2013,35(2):310-319.[吴雪娇,杨梅学,吴洪波,等.TRMM多卫星降水数据在黑河流域的验证与应用[J].冰川冻土,2013,35(2):310-319.]
[6] Dinku T,Anagnostou E N,Borga M.Improving radar-based estimation of rainfall over complex terrain[J].Journal of Applied Meteorology,2002,41(12):1163-1178.
[7] Chiu L S,Liu Z,Vongsaard J,et al.Comparison of TRMM and water district rain rates over New Mexico[J].Advances in Atmospheric Sciences,2006,23(1):1-13.
[8] Adeyewa Z D,Nakamura K.Validation of TRMM radar rainfall data over major climatic region in Africa[J].Journal of Applied Meteorology,2003,42(1):331-347.
[9] Wang Zhenhui.A brief introduction to TRMM precipitation radar and a summary on the study of its applications[J].Scientia Meteorologica Sinica,2001,21(4):491-500.[王振会.TRMM卫星测雨雷达及其应用研究综述[J].气象科学,2001,21(4):491-500.]
[10] Luo San,Miao Junfeng,Niu Tao,et al.A comparison of TRMM 3B42 products with rain gauge observations in China[J].Meteorological Monthly,2011,37(9):1081-1090.[骆三,苗峻峰,牛涛,等.TRMM测雨产品3B42与台站资料在中国区域的对比分析[J].气象,2011,37(9):1081-1090.]
[11] Zeng Hongwei,Li Lijuan.Accuracy validation of TRMM 3B43 data in Lancang River Basin[J].2011,66(7):994-1004.[曾红伟,李丽娟.澜沧江及周边流域TRMM 3B43数据精度检验[J].地理学报,2011,66(7):994-1004.]
[12] Li Qiong,Yang Meixue,Wan Guoning,et al.Analysis of the accuracy of TRMM 3B43 precipitation data in the source region of the Yellow River[J].Journal of Glaciology and Geocryology,2016,38(3):620-633.[李琼,杨梅学,万国宁,等.TRMM 3B43降水数据在黄河源区的适用性评价[J].冰川冻土,2016,38(3):620-633.]
[13] Wen Xu.Characteristics of warm-season precipitation over Beijing-Tianjin-Hebei region[D].Lanzhou:Lanzhou University,2016.[温煦.京津冀地区暖季降水特征分析[D].兰州:兰州大学,2016.]
[14] Wang Jiali,Zhang Renhe,Wang Yingchun.Features of the surface air temperature in different areas of Beijing and the representativeness of Beijing observatory[J].Climatic and Environmental Research,2012,3(23):265-273.[王佳丽,张人禾,王迎春.北京不同区域表面气温的变化特征以及北京市观象台气温的代表性[J].气候与环境研究,2012,3(23):265-273.]
[15] Li Nan,Lu Meiqi.A brief Introduction to spaceborne precipitation radar[J].The Science Education Article Collects,2015(9):175-177.[李南,卢美圻.星载测雨雷达简介[J].科教文汇,2015(9):175-177.]
[16] Lü Yang,Yang Shengtian,Cai Mingyong,et al.The applicability analysis of TRMM precipitation data in the Yarlung Zangbo River basin[J].Journal of Natural Resources,2013,28(8):1414-1425.[吕洋,杨胜天,蔡明勇,等.TRMM卫星降水数据在雅鲁藏布江流域的适用性分析[J].自然资源学报,2013,28(8):1414-1425.]
[17] Liu Peng.Comparison of precipitation between Rain Gauge observations and TRMM PR measurements[D].Hefei:University of Science and Technology of China,2009.[刘鹏.星载测雨雷达探测结果与地面雨量计观测结果之比较[D].合肥:中国科学技术大学,2009.]
[18] Chen Cheng.Calibration and spatial downscaling of TRMM 3B43 precipitation product[D].Nanjing:Nanjing University,2016.[陈诚.TRMM 3B43遥感降水量产品数据定标与降尺度方法研究[D].南京:南京大学,2016.]
[19] Cheng Ke,Zhu Zhen,Li Ming,et al.Application and accuracy testing of TRMM 3B43 rainfall product in Tibetan region[J].Water Resources and Hydropower Engineering,2014,45(1):44-46.[程珂,朱祯,李铭,等.TRMM3B43降水产品在西藏地区的精度检验和应用[J].水利水电技术,2014,45(1):44-46.]