Some PSD datasets and products are not up-to-date due to a system problem. We are working on a fix.
 

How to Reference Datasets

You can use the plots produced from this page in publications. We ask that you acknowledge the Physical Science Division in the publication. For example,

"Image provided by the NOAA/ESRL Physical Sciences Division, Boulder Colorado from their Web site at http://www.esrl.noaa.gov/psd/".

You will also need to reference the datasets directly:

 

NCEP Reanalysis

You should also reference the NCEP BAMS article for the NCEP Reanalysis data:

Kalnay, E. and Coauthors, 1996: The NCEP/NCAR Reanalysis 40-year Project. Bull. Amer. Meteor. Soc., 77, 437-471.