热带测雨卫星数据在黑河流域的精度及应用

赵军; 刘原峰; 朱国锋; 师银芳; 李佳芳; 杨玲; 黄永生; 胡鹏飞

doi:10.13961/j.cnki.stbctb.2016.03.053

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热带测雨卫星数据在黑河流域的精度及应用

试验研究

- 热带测雨卫星数据在黑河流域的精度及应用
- Accuracy and Application of Tropical Rainfall Measuring Mission Data in Heihe River Basin
- 水土保持通报 2016年36卷第3期页码：309-315
- 作者机构：
  
  1. 西北师范大学地理与环境科学学院,甘肃,兰州,730000
  2. 中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,甘肃,兰州,730000
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“中国潜在草原格局演替及其对气候变化响应的GIS模拟”（D010702）;中国科学院冰冻圈科学国家重点实验室开放基金（SKLCS-OP-2014-11）;西北师范大学青年教师科研能力提升计划项目（NWNU-LKQN-13-10）;国家重大科学研究计划项目（2013CBA01800）;农业部耕地及粮食安全本底调查重大专项
- DOI：10.13961/j.cnki.stbctb.2016.03.053
  中图分类号：
- 纸质出版：2016
- 稿件说明：
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赵军, 刘原峰, 朱国锋, 等. 热带测雨卫星数据在黑河流域的精度及应用[J]. 水土保持通报, 2016,36(3):309-315.

ZHAO Jun, LIU Yuanfeng, ZHU Guofeng, et al. Accuracy and Application of Tropical Rainfall Measuring Mission Data in Heihe River Basin[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 309-315.
赵军, 刘原峰, 朱国锋, 等. 热带测雨卫星数据在黑河流域的精度及应用[J]. 水土保持通报, 2016,36(3):309-315. DOI： 10.13961/j.cnki.stbctb.2016.03.053.

ZHAO Jun, LIU Yuanfeng, ZHU Guofeng, et al. Accuracy and Application of Tropical Rainfall Measuring Mission Data in Heihe River Basin[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 309-315. DOI： 10.13961/j.cnki.stbctb.2016.03.053.

摘要

［目的］验证热带测雨卫星数据TRMM（tropical rainfall measuring mission）3B43降水产品在黑河流域内的精度及可用性，了解全流域降水的空间分布，为西北干旱区流域开展水文和生态研究提供数据支持。［方法］基于黑河流域1998-2013年TRMM 3B43 V7数据和11个气象站点数据，使用相关系数、均方根误差、平均误差、平均绝对误差等主要指标评估其在流域内精度，揭示各指标空间分布特征。［结果］（1） TRMM数据与实测数据有极强的统计相关性和趋势一致性，但存在不同程度高估现象，月平均高估2.84 mm，季、年尺度高估值分别达到8.55和34.1 mm；（2）相关系数、均方根误差，从上游到下游依次降低，平均误差在3尺度上上游值均远低于中下游，平均绝对误差在年尺度上游最低，下游次之，中游最高，而在季节尺度上中游相差不大，下游最小，月尺度从上游到下游平均绝对误差值逐渐递减。［结论］ TRMM数据显示黑河流域多年平均降雨量呈西南部向中、北部递减的分布格局，且降水量具有上游 > 中游 > 下游的梯度分布，降水年内分配不均，主要集中在5-9月。

Abstract

[Objective] To verify and use TRMM(tropical rainfall measuring mission) 3B43 precipitation product in the Heihe river basin(HRB) in order to understand the spatial distribution of precipitation and provide reliable data for hydrological and ecological studies.[Methods] The TRMM 3B43 V7 precipitation data and 11 meteorological data in HRB was collected from 1998 to 2013. The indices including CC(correlation coefficient)

RMSE(root-mean-square error)

ME(mean error) and MAE(mean absolute error) were used to assess the accuracy of TRMM data within the basin

and the spatial distribution characteristics of each index was investigated.[Results] It showed that there was an extremely significant correlation between TRMM and the observed data

but the TRMM data might be a little bit overestimated

monthly average rainfall could be overestimated by 2.84 mm

and seasonal and annual value could be overestimated by 34.1 and 8.55 mm

respectively. The value of CC and RMSE decreased from upstream to downstream

the ME value in upstream was far lower than in the middle and lower reaches at all three scales. The value of MAE was the lowest in upstream

but it is highest in the middle reaches at the annual scale

and a similar trend was found at the seasonal scale. The MAE value decreased from upstream to downstream at the monthly scale.[Conclusion] According to the TRMM data

the distribution of the annual average rainfall decreased from the southwest to north and central part of the basin. The precipitation gradient distributed showed as upstream > midstream > downstream. The annual precipitation distributed unevenly

mainly concentrated in the period from May to September.

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references

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