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Reducing Noise in the MSU Daily Lower-Tropospheric Global Temperature Dataset (1996)

Christy, John R. ; Spencer, Roy W. ; McNider, Richard T.

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Publication Date: 2019-07-17

Description: The daily global-mean values of the lower-tropospheric temperature determined from microwave emissions measured by satellites are examined in terms of their signal, noise, and signal-to-noise ratio. Daily and 30-day average noise estimates are reduced by almost 50% and 35%. respectively, by analyzing and adjusting (if necessary) for errors due to 1) missing data, 2) residual harmonics of the annual cycle unique to particular satellites, 3) lack of filtering, and 4) spurious trends. After adjustments, the decadal trend of the lower-tropospheric global temperature from January 1979 through February 1994 becomes -0.058 C. or about 0.03 C per decade cooler than previously calculated.

Keywords: Meteorology and Climatology

Type: Monitoring, Analyzing, and Modeling the Global Earth System; NASA/CR-1999-209736

Format: text

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