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Do Satellites Detect Trends in Surface Solar Radiation?

Author(s): Pinker RT, Zhang B, Dutton EG

Published: May, 2005

Publisher: Science

DOI: 10.1126/science.1103159

Tags: Climate Science

URL: http://www.sciencemag.org/content/308/5723/850.abstract

Abstract: Long-term variations in solar radiation at Earth's surface (S) can affect our climate, the hydrological cycle, plant photosynthesis, and solar power. Sustained decreases in S have been widely reported from about the year 1960 to 1990. Here we present an estimate of global temporal variations in S by using the longest available satellite record. We observed an overall increase in S from 1983 to 2001 at a rate of 0.16 watts per square meter (0.10%) per year; this change is a combination of a decrease until about 1990, followed by a sustained increase. The global-scale findings are consistent with recent independent satellite observations but differ in sign and magnitude from previously reported ground observations. Unlike ground stations, satellites can uniformly sample the entire globe.


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