Estimating global solar radiation using a hybrid parametric model from MODIS data over the Tibetan Plateau
Estimating global solar radiation using a hybrid parametric model from MODIS data over the Tibetan Plateau
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使用青藏高原 MODIS 数据的混合参数模型估算全球太阳辐射
DOI：
10.1016/j.solener.2014.12.015
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发表时间：
2015-02
期刊：
影响因子：
6.7
通讯作者：
Liu Qinhuo
中科院分区：
文献类型：
--
作者：
Zhang Hailong;Xin Xiaozhou;Li Li;Liu Qinhuo
青藏高原地形复杂，在全球大气环流中占有重要地位。地表下行短波辐射(DSSR)具有观测稀疏、地表崎岖等特点，可以从遥感数据中获取。本文提出了一种基于卫星的全天下行地表短波辐射反演方案，该方案将查找表算法和卫星图像联系起来。晴空和多云天空的查找表分别使用基于物理的综合一维辐射传输模式SBDART来创建，与综合辐射传输模式相比，具有更高的计算精度和效率。利用青藏高原8个测站1年的日照时计观测资料对估算的DSSR进行了验证，并与1°空间分辨率的Gewex-SRB资料进行了比较。结果表明，果洛站最大均方根误差为60W/m2(32%)，格尔木站最小均方根误差为130W/m2(13%)。这种偏差在夏季较大，冬季较小，这可能是由于一维辐射传输模式和MODIS云特性积对破碎云和非均匀云的假设存在不确定性所致。该算法不受气候和地表高程的影响，不需要局部标定，可以在全球范围内应用。
The Tibetan Plateau plays an important role in global atmospheric circulation with its complex terrain. The downward surface shortwave radiation (DSSR) can be obtained from remote sensing data because of its sparse observations and rugged surface. In this paper, a satellite-based scheme is presented to retrieve all-sky downward surface shortwave radiation, which links a look-up table algorithm and satellite images. The look-up table for clear sky and cloudy sky was created separately using a comprehensive 1D physically based radiative transfer model SBDART to achieve a higher computational accuracy and efficiency compared to the comprehensive radiative transfer model. The estimated DSSR was validated using one year pyranometer measurements from 8 stations in the Tibetan Plateau and compared with GEWEX–SRB data with 1° spatial resolution. The result shows that the largest root mean square error was 60 W/m2(32%) at Guoluo station, and the least root mean square error was 13 W/m2(13%) at Golmud station. The bias was larger in summer and smaller in winter, which may be caused by uncertainties in the assumption from the 1D radiative transfer model and MODIS cloud properties product for broken and inhomogeneous clouds. The algorithm we proposed can be applied globally without local calibration because it is independent of climate and the surface elevation.
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一种简单有效的算法，用于根据对地静止卫星数据估算每日全球太阳辐射
影响因子：
9
作者：
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影响因子：
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