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- W2169558001 abstract "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 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$R^{2} = hbox{0.69}$</tex></formula> , a bias of 29.7 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> (6.0% in relative value), and a standard deviation (STD) of 123.2 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> (25.1% in relative value). The values are 0.83, <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$-5.5 hbox{Wm}^{-2}$</tex></formula> ( <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$-$</tex></formula> 1.9%), 101.3 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$ hbox{Wm}^{-2}$</tex></formula> (35.0%) for SRB, and 0.83, 2.8 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$ </tex></formula> (0.3%), 101.7 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{W m}^{-2}$</tex></formula> (35.0%) for FD. However, there are substantial uncertainties in these products in some regions. For example, large biases ranging from <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$-90.2 hbox{Wm}^{-2}$</tex></formula> to 45.8 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> are found in SRB in Southeast Asia. FD has large biases in Southeast Asia (58.9 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> ) and Greenland <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{(-33.2} hbox{Wm}^{-2}hbox{)}$</tex></formula> . FSW has substantial biases in Southeast Asia (72.6 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> ) and Japan (66.5 <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX>$hbox{Wm}^{-2}$</tex></formula> ); while <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex Notation=TeX> $R^{2}$</tex></formula> is 0.35 in Tibetan Plateau and 0.47 in Southeast Asia." @default.
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- W2169558001 date "2010-10-01" @default.
- W2169558001 modified "2023-10-13" @default.
- W2169558001 title "Assessment of Three Satellite-Estimated Land Surface Downwelling Shortwave Irradiance Data Sets" @default.
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- W2169558001 doi "https://doi.org/10.1109/lgrs.2010.2048196" @default.
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