[1]杨东,刘雯,朱靖轩,等.TRMM降水数据在洞庭湖流域的精度评估和应用[J].水土保持研究,2019,26(03):279-284.
　YANG Dong,LIU Wen,ZHU Jingxuan,et al.Accuracy Evaluation and Application of the TRMM Precipitation Data in Dongting Lake Basin[J].Research of Soil and Water Conservation,2019,26(03):279-284.
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TRMM降水数据在洞庭湖流域的精度评估和应用

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年03期 页码: 279-284 栏目: 出版日期: 2019-04-12
Title:
Accuracy Evaluation and Application of the TRMM Precipitation Data in Dongting Lake Basin
作者:
杨东1,2, 刘雯1,2, 朱靖轩1, 张洪涛1, 李学章3, 徐宪立3
1. 湖南师范大学 资源与环境科学学院, 长沙 410081;
2. 湖南师范大学 地理空间大数据挖掘与应用湖南省重点实验室, 长沙 410081;
3. 中国科学院 亚热带农业生态研究所, 长沙 410125
Author(s):
YANG Dong1,2, LIU Wen1,2, ZHU Jingxuan1, ZHANG Hongtao1, LI Xuezhang3, XU Xianli3
1. College of Resources and Environment Science, Hunan Normal University, Changsha 410081, China;
2. Key Laboratory of Geospatial Big Data Mining and Application, Changsha 410081, China;
3. Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
关键词:
TRMM 3B43; 卫星降水产品; 精度评估; 洞庭湖流域
Keywords:
TRMM 3B43; satellite precipitation; accuracy evaluation; Dongting Lake Basin
分类号:
P426.6
摘要:
高分辨率卫星降雨产品的出现为降水观测提供了良好的前景。然而这些产品在使用前需要经过全面的精度评估。评估了TRMM （Tropical Rainfall Measuring Mission）3B43V7降水数据在洞庭湖流域的精度和适应性。基于洞庭湖流域1998—2011年TRMM降水数据和27个气象站点的实测降水数据，采用相关系数、均方根误差和均方误差技能分数等指标在月和季尺度下评估其在流域内精度，揭示各指标的空间分布特征。结果表明：（1）在月尺度上，TRMM数据与实测数据拟合良好，相关系数为0.89，但TRMM数据在流域大部分地区高估降水。（2）在季尺度上，TRMM数据精度较月尺度有所提升，相关系数达到0.94，并且可靠性更高。（3）两种数据在流域降水时空分布上表现出一致性，在春夏两季为湿润多雨期，秋冬季节降水则相对匮乏。流域内降水分布不均匀，整体呈从东南向西北减少趋势。
Abstract:
The high-resolution satellite rainfall products provide a great opportunity to monitor precipitation. However, the accuracies of these products need assessment before use. The objective of this study is to evaluate the accuracies and adaptabilities of the application of TRMM (Tropical Rainfall Measuring Mission) 3B43 V7 data in the Dongting Lake Basin. The TRMM data and 27 meteorological precipitation data in the Dongting Lake Basin were collected from 1998 to 2011. The indices including correlation coefficient (r), root-mean-square error (RMSE) and mean square skill score (MSSS) were used to assess the accuracy of the TRMM data at the monthly and seasonal scales, respectively, within the basin, and the spatial distribution characteristics of each index was investigated. The results showed that:(1) on the monthly scale, the TRMM data had a good fit with the observed precipitation data with the correlation coefficient of 0.89; overall, the TRMM data was higher than that of the observed precipitation data in most areas of the basin; (2) at the seasonal scale, the TRMM data were comparatively more accurate with the correlation coefficient of 0.94, and the reliability was higher; (3) the temporal distributions of the two kinds of data were similar in the Dongting Lake Basin, the precipitation was higher in spring and summer while it was lower in autumn and winter. The distribution of precipitation is uneven in the Dongting Lake Basin, which reduces from the southeast to the northwest.

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备注/Memo

收稿日期:2018-08-26;改回日期:2018-09-05。
基金项目:湖南省自然科学资助项目（2015JJ6068）；国家自然科学基金（41501478）；国家重点研发计划项目（2016YFC0502400）；湖南省重点学科地理学（2016001）
作者简介:杨东(1993-),男,河南驻马店人,硕士研究生,研究方向为生态环境遥感。E-mail:yangtao9318@163.com
通讯作者:刘雯(1982-),女,浙江杭州人,副教授,研究方向为生态环境遥感。E-mail:liuwenww@gmail.com

更新日期/Last Update: 1900-01-01