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NOAA Extended Reconstructed Sea Level Pressure (SLP)

One-line description: Extended Reconstruction of Historical Sea Level Pressure (SLP) Using improved statistical methods (1854 to present).

Spatial coverage:

  • 88N-88S (by 2.0), 0-358E (by 2.0)
Temporal coverage:
  • Monthly means from Jan. 1, 1854 through Dec 1997.
Original Source:

Thomas M. Smith
Scientific Services Division
151 Patton Ave. Room 514
Asheville NC 28801

Phone: (828) 271-4494
e-mail: Tom.Smith@noaa.gov

Richard W. Reynolds
Scientific Services Division
151 Patton Ave. Room 514
Asheville NC 28801

Phone: (828) 271-4302
FAX: (828) 271-4328
e-mail: Richard.W.Reynolds@noaa.gov

Additional details from the authors: http://www.ncdc.noaa.gov/oa/climate/research/slp/. Archive parameters: File names are composed of variable abbreviations and average period.


Variable Abbreviation
Sea level pressure slp

Detailed description: The extended reconstructed sea surface temperature (ERSLP) was constructed using the most recently available Comprehensive Ocean-Atmosphere Data Set (COADS) SLP data and improved statistical methods that allow stable reconstruction using sparse data. This monthly analysis begins January 1854, but because of sparse data the analyzed signal is heavily damped before 1910. Afterwards the strength of the signal is more consistent over time.

Please note: If you acquire NOAA Extended Reconstructed SLP data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as NOAA Extended Reconstructed SLP data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the NOAA Extended Reconstructed SLP data set freely available online in the future. Thank you!

Missing data: Data have been interpolated in time and space by the providers. Land points are set to the netCDF missing value.

Dataset format and size:

  • netCDF file ~55 Mbytes for the monthly means.
  • netCDF file ~4 Mbytes for the longterm monthly means. (1950-79)
References Smith, T.M., and R.W. Reynolds, 2004: Reconstruction of Monthly Mean Oceanic Sea Level Pressure Based on COADS and Station Data (1854-1997). J. Oceanic Atmos. Tech., 21, 1272-1282.

Archive location(s): Climate Diagnostics branch of ESRL/PSD
325 Broadway
Boulder, CO 80305-3328

Availability and usage restrictions:

Anonymous ftp at ftp.cdc.noaa.gov

Contact person(s): Physical Sciences Division: Data Management
325 Broadway
Boulder, CO 80305-3328