Monthly Northern Hemisphere Sea-Level Pressure Grids, continuing from 1899

This dataset contains the longest continuous time series of monthly gridded Northern Hemisphere sea-level pressure data in the DSS archive. The 5-degree latitude/longitude grids, computed from the daily grids in ds010.0, begin in 1899 and cover the Northern Hemisphere from 15N to the North Pole. The dataset continues to be updated regularly as new data become available. Each monthly grid is a simple average of all available daily grids for the month. Prior to 1955, there is one grid per day. From July 1962 on, there are two grids each day. In the interim period, the number of daily grids varies between one and two. The grids for the period 1899-1977 were inspected and many corrections were made by Kevin Trenberth of the Laboratory of Atmospheric Research at the University of Illinois at Champaign-Urbana, and these grids are included in this dataset. For more information about these corrections, see the July 1980 issue of Monthly Weather Review.

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Temporal Range

  • Begin:  1899-01-01T1300+00
    End:  2025-11-30T2400+00

Keywords

Resource Type dataset
Temporal Range Begin 1899-01-01T1300+00
Temporal Range End 2025-11-30T2400+00
Temporal Resolution N/A
Bounding Box North Lat 90.0
Bounding Box South Lat 15.0
Bounding Box West Long -180.0
Bounding Box East Long 180.0
Spatial Representation grid
Spatial Resolution 5 degree
Related Links N/A
Additional Information N/A
Resource Format DSS SLP Grid
Standardized Resource Format OTHER
Asset Size 3.119 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author
Publisher NSF National Center for Atmospheric Research
Publication Date 1979-12-13
Digital Object Identifier (DOI) https://doi.org/10.5065/Z88P-AW38
Alternate Identifier d010001
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2025-12-03T04:05:05Z
Metadata Record Identifier edu.ucar.gdex::d010001
Metadata Language eng; USA
Suggested Citation . (1979). Monthly Northern Hemisphere Sea-Level Pressure Grids, continuing from 1899. NSF National Center for Atmospheric Research. https://doi.org/10.5065/Z88P-AW38. Accessed 02 January 2026.

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