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Time Section Home
Background Information
Related Plot/Analysis

Time Section Plots Using Gridded Daily Data

Improved time section plots are now available. Users can now average over 0E for time by latitude plots. You can also use the 20CR dataset from 1948 onwards. Then old page will still be available here for a period of time. Please let us know if you have any questions, issues, or comments. We are working on allowing users to plot hovmollers before 1948 and in providing comparable colortable to the older page.

OLR plots plotted different dates than those selected. The labels matched the dates that were plotted. The plots are now correct.

Data Availability
  • Operational data are available from Jan 1, 1979 through 03/30/2015
  • R1 Reanalysis data are available from Jan 1, 1948 through 03/28/2015
  • 20CR Reanalysis data are available on this page from Jan 1, 1948 through Dec 31, 2012
  • Outgoing Longwave Radiation data are available from June 1, 1974 through 2013/12/31 .

(Default plot is Time-Longitude along the Equator with no area averaging)
Which variable?   Analysis level?
Beginning month: Ending month:
Beginning Day:     Ending Day:    
Beginning year:     Ending year:    
Operational data begins in 1979

Dataset:   Operational  NCEP Reanalysis 20th Century Reanalysis V2  

Statistic:   Mean          Anomaly          Climatology
Plot type:     Time-Longitude    Time-Latitude Postscript output?   Yes    No

Longitude Range (e.g.,   Lon1: 0     Lon2: 360)

Lon1:         Lon2:
Latitude Range     (e.g.,   Lat1: 90     Lat2: -90) Lat1:           Lat2:

Override contour interval?   Interval:

Range  Low:   High:

Optional: Change size of plot (1-300%) %
Change default Color Table?   (see NCL color tables)


You may use the images produced from this page in publications, but we ask that you acknowledge us in this manner: Image provided by the NOAA/ESRL Physical Sciences Division, Boulder Colorado from their Web site at

Additional Notes

  • Operational: All mean, anomaly, and climatology plots can be created. Pressure levels available: 1000, 850, 700, 500, 400, 300, 250, 200, 150, 100, 70, 50.
  • Reanalysis: No climatology for surface relative humidity, therefore no climatology or anomaly plots. All pressure levels plus surface are available.
  • Please report any errors to:
This is a Research and Development Application