By Topic

Assessment of Three Satellite-Estimated Land Surface Downwelling Shortwave Irradiance Data Sets

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Sheng Gui ; School of Resource and Environmental Science, Wuhan University, Wuhan, China ; Shunlin Liang ; Kaicun Wang ; Lin Li
more authors

This letter assesses three satellite-estimated surface downwelling shortwave irradiance data sets: 1) GEWEX-SRB; 2) ISCCP-FD; and 3) CERES-FSW, using ground measurements collected at 36 globally distributed sites from 2000-2002. SRB and FD solar irradiance are available at three hourly intervals during daytime and FSW hourly solar irradiance is available at late morning. The data are compared to ground measurements at the temporal resolutions of the satellite measurements. Results indicate that the downwelling solar irradiances of the three products show good overall agreement with ground measurements. FSW has an overall coefficient of determination of R2 = 0.69, a bias of 29.7 Wm-2 (6.0% in relative value), and a standard deviation (STD) of 123.2 Wm-2 (25.1% in relative value). The values are 0.83, -5.5 Wm-2 (-1.9%), 101.3 Wm-2 (35.0%) for SRB, and 0.83, 2.8 Wm-2 (0.3%), 101.7 W m 2 (35.0%) for FD. However, there are substantial uncertainties in these products in some regions. For example, large biases ranging from -90.2 Wm-2 to 45.8 Wm-2 are found in SRB in Southeast Asia. FD has large biases in Southeast Asia (58.9 Wm-2) and Greenland (-33.2 Wm-2). FSW has substantial biases in Southeast Asia (72.6 Wm-2) and Japan (66.5 Wm-2); while R2 is 0.35 in Tibetan Plateau and 0.47 in Southeast Asia.

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:7 ,  Issue: 4 )