Current Climate Charts


Outgoing Longwave Radiation (OLR) Products

As measured at the top of the atmosphere primarily by the NOAA polar-orbitting satellites. Earlier sections of this dataset were obtained from NOAA/OAR/ESRL/PSD (readme), while the most recent data is obtained more directly from NOAA's Climate Prediction Center (readme). Unless otherwise specified, missing data have been removed by interpolation. Anomalies are with respect to the mean and 3 harmonics of the annual cycle, as calculated using a base period of 23 years from 1979 to 2001. Dates refer to the date at Greenwich (i.e., UTC). Possible spurious long-term drifts in the data due to drifts in the satellite equatorial crossing time have not been accounted for. (Last updated with data from:DD MNTH YEAR)

Global Circulation Analysis Products

Plots produced using daily-averaged analyses from a combination of the NCEP/NCAR Reanalysis and the NCEP Operational analysis. Data up until DD MNTH YEAR is from the Reanalysis. After that day the data source is the NCEP Operational analysis for which the date of the most recent data is DD MNTH YEAR. In this way we are assured of having the most up-to-date data (NCEP Operational), yet also as much data as possible from the Reanalysis (which has a better defined climatology). Anomalies are created using the NCEP Reanalysis from 1979 to 2001 as the climatology. Both data streams are obtained from NOAA/OAR/ESRL/PSD.

Combined OLR and Global Circulation Products


Created and maintained by Matthew Wheeler