3种不同遥感辐射产品的精度比较

李净; 王丹

doi:10.3878/j.issn.1006-9585.2017.17038

3种不同遥感辐射产品的精度比较

doi: 10.3878/j.issn.1006-9585.2017.17038

李净,
王丹^,

西北师范大学地理与环境科学学院, 兰州 730070

基金项目:

国家自然科学基金项目 41261016

西北师范大学青年教师科研能力提升计划项目 NWNU-LKQN-14-4

详细信息

作者简介:
李净, 女, 1978年出生, 副教授, 博士, 主要从事复杂地形下定量遥感的研究。E-mail: li_jinger@nwnu.edu.cn

通讯作者:
王丹, E-mail: wang_douou@163.com

中图分类号: P422.1
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- 文章访问数: 1274
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- 被引次数: 0
出版历程
- 收稿日期: 2017-03-10
- 网络出版日期: 2017-11-13
- 刊出日期: 2018-03-20

A Comparative Study on Three Types of Remote Sensing Solar Radiation Products

Jing LI,
Dan WANG^,

College of Geographical and Environmental Science, Northwest Normal University, Lanzhou 730070

Funds:

National Natural Science Foundation of China 41261016

Northwest Normal University Youth Teachers' Academic Promotion Program NWNU-LKQN-14-4

摘要

摘要: 遥感辐射产品的验证研究主要集中在单一产品在青藏高原地区和实测数据的比较分析上，缺乏产品之间的相互比较从而无法得知产品的适用性，因此针对整个中国地区对这些产品的适用性进行系统性的比较研究。选取了数据序列较完整的GEWEX-SRB（Global Energy and Water Cycle Experiment-Surface Radiation Budget）、CERES-EBAF（Clouds and Earth's Radiant Energy Systems-Energy Balanced and Filled）和GLASS-DSR（Global LAnd Surface Satellite-Downward Shortwave Radiation）3种辐射产品，以相关系数、平均偏差、均方根误差为评价指标在整个中国区域范围内进行精度评价，并且对其精度的时空分布特征进行了研究。研究表明，2000~2007年GEWEX-SRB与CERES-EBAF相比两者具有相似的偏差趋势，低估和高估最严重站点同为峨眉山站和太原站，总体上CERES-EBAF的精度更高。2008~2010年间GLASS-DSR与CERES-EBAF进行对比结果表明CERES-EBAF精度要高。总体来说，这3种辐射产品的精度都较高，低估的站点大多地处高海拔地区，其中CERES-EBAF产品时间序列长且精度相对较高，尤其是在中东部及大部分沿海地区精度较高。
- 向下短波辐射 /
- 正弦曲线模型 /
- GEWEX-SRB辐射产品 /
- CERES-EBAF辐射产品 /
- GLASS-DSR辐射产品
Abstract: The verification of remote sensing radiation products mainly focuses on comparative analyses of single products and measured data in the Qinghai-Tibet Plateau region. The lack of comparison between the products make it hard to determine the applicability of these products. Therefore, a systematic comparative study of the applicability of these products in China is conducted in the present study. GEWEX-SRB (Global Energy and Water Cycle Experiment-Surface Radiation Budget), CERES-EBAF (Clouds and Earth's Radiant Energy Systems-Energy Balanced and Filled), and GLASS-DSR (Global LAnd Surface Satellite-Downward Shortwave Radiation) radiation products are chosen to verify their accuracy. The correlation coefficient, the mean bias error, and root mean square error are taken as evaluation indexes, and the accuracy of the temporal and spatial distribution of these products in China is discussed. GEWEX-SRB and CERES-EBAF over the period from 2000 to 2007 are compared and analyzed. Results indicate both of them have the same overestimation and underestimation tendencies. The most severe underestimation and overestimation both occur at Mount Emei Station and Taiyuan Station, and the accuracy of CERES-EBAF is higher than that of GEWEX-SRB. GLASS-DSR and CERES-EBAF over the period from 2008 to 2010 are also compared and analyzed. It is found that CERES-EBAF has a higher accuracy. Overall, these three radiation products all have a high accuracy. The underestimated sites are mostly located at high altitudes. The CERES-EBAF product covers a long time period with a relatively high accuracy, especially in eastern China and most of the coastal region in China.
- Downward shortwave radiation /
- Sinusoidal model /
- GEWEX-SRB radiation product /
- CERES-EBAF radiation product /
- GLASS-DSR radiation product

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图 1 每日总辐射估算原理示意图

Figure 1. Schematic diagram of daily total radiation estimation

下载: 全尺寸图片幻灯片

图 2 2000~2007年GEWEX-SRB(左列)和CERES-EBAF(右列)卫星辐射值与地面观测值对比分析结果空间分布：(a、b)相关系数；(c、d)平均偏差；(e、f)均方根误差

Figure 2. Spatial distribution of comparative results of s GEWEX-SRB (Global Energy and Water Cycle Experiment-Surface Radiation Budget; left column) and CERES-EBAF (Clouds and Earth's Radiant Energy Systems-Energy Balanced and Filled; right column) with ground observations of radiation during 2000 to 2007: (a, b) Correlation coefficient; (c, d) MBE (Mean Bias Error); (c, d) RMSE (Root Mean Square Error)

下载: 全尺寸图片幻灯片

图 3 2008~2010年GLASS-DSR(左列)和CERES-EBAF(右列)卫星辐射值与地面观测值对比分析结果空间分布：(a、b)相关系数；(c、d)平均偏差；(e、f)均方根误差

Figure 3. Spatial distribution of comparative results of GLASS-DSR (Global LAnd Surface Satellite-Downward Shortwave Radiation; left column) and CERES-EBAF (right column) with ground observations of radiation during 2008 to 2010: (a, b) Correlation coefficient; (c, d) MBE; (c, d) RMSE

下载: 全尺寸图片幻灯片

表 1 卫星辐射值与地面观测值对比分析结果

Table 1. Comparison of satellite radiation values and ground observations

	2000~2007年			2008~2010年
	相关系数	平均偏差/W m^-2	均方根误差/W m^-2	相关系数	平均偏差/W m^-2	均方根误差/W m^-2
GEWEX-SRB	0.94	6.31	19.78	—	—	—
CERES-EBAF	0.95	6.17	17.07	0.95	6.49	16.15
GLASS-DSR	—	—	—	0.95	6.09	20.16

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