Preliminary evaluation of the long-term GLASS albedo product
Preliminary evaluation of the long-term GLASS albedo product
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DOI：
10.1080/17538947.2013.804601
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发表时间：
2013-12-09
影响因子：
5.1
通讯作者：
Liang, Shunlin
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Wang, Lizhao;Liang, Shunlin
地表反照率是描述气候系统辐射强迫的重要参数。要了解气候变化的机制，需要一系列长期的全球反照率产品。为了支持全球变化和地球系统研究，GRAP(全球陆地表面卫星)提供了1981至2010年全球陆地表面反照率的长期产品，这些产品是由多源遥感数据和新开发的算法生成的。当玻璃产品向公众发布时，评估其质量是至关重要的。本文首先介绍了算法，然后分析了玻璃反照率产品的完整性、准确性和稳健性。结果表明，玻璃反照率产品是一个无间隙、长期连续和自洽的数据集，其精度与公认的MODIS MCD43产品相似。与黑天和白天反照率一起提供的质量旗帜，给出了产品预期不确定度的相关指示。
Land surface albedo is an important parameter to describe the radiant forcing in the climate system. A long-time series of global albedo products is needed to understand the mechanism of climate change. Aiming to support global change and Earth system studies, GLASS (Global LAnd Surface Satellites) provides long-term global land surface albedo product from 1981 to 2010, which are generated from multisource remote sensing data and newly developed algorithms. It is critical to assess the quality of the GLASS product when it is released to the public. This paper first introduced the algorithms and then analyzed the integrity, accuracy, and robustness of the GLASS albedo product. The results show that the GLASS albedo product is a gapless, long-term continuous, and self-consistent data-set with an accuracy similar to that of the widely acknowledged MODIS MCD43 product. The quality flag, which is provided along with the black-sky and white-sky albedo, gives a pertinent indication of the expected uncertainty in the product.