By Popular Demand: A Daily Global Average CERES Dataset

May 13th, 2010 by Roy W. Spencer, Ph. D.

Since I keep getting requests for the data from which I do my analyses, I’ve decided to provide the main dataset I use here, in an Excel spreadsheet. The comments at the top of the spreadsheet are pretty self-explanatory and include links to the original data. After you click on and open the file with Excel, save it to your computer so you can analyze the data.

What’s In the File, Kenneth?

From original satellite data online at 2 sources, I have calculated daily global-average anomalies (departures from the average annual cycle) in (1) total-sky emitted longwave (LW, or infrared) radiative flux; (2) total-sky reflected shortwave (SW, or solar) radiative flux, and (3) UAH tropospheric temperatures (TMT).

The original radiative flux data that I computed these anomalies from are the Terra satellite CERES Flight Model 1 (FM1) instrument-based ES4 (ERBE-like) daily global gridpoint datasets, available here. These are large files in a binary format, and are not for the weak of heart.

The original UAH TMT temperature data come from here.

All of the original data were area-averaged over the Earth for each day during the 9.5 year Terra CERES period of record, March 2000 through September 2009. An average annual cycle was computed, filtered with a +/- 10 day smoother applied every day, and then anomalies were computed by subtracting the smoothed average annual cycle values from the original data. I program these calculations in Fortran-95, put the data in an Excel spreadsheet, then do all future calculations and graphical plots in Excel.

And remember, folks…“If you torture the data long enough, it will confess.”

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