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NCEP Daily 65x65 Northern Hemisphere Tropospheric Analyses for 1973 January to 1997 March (and 47x51 subset, by DSS)

This dataset contains twice daily gridded Northern Hemisphere analyses from NMC's operational model on 47x51 and 65x65 polar-stereographic grids centered on the North Pole. Available parameters include geopotential height, temperature, stream functions, thickness, and vertical velocity for various levels and layers through the troposphere.

NCEP prepared the 65x65 analyses, and were an advancement over the 47x51 "B-3" analyses. Later NCEP made global analyses, from which the 65x65 analyses were interpolated. To continue the 47x51 analyses, NCAR/CISL/DSS extracted them from the 65x65 grid.

More information is available

PERIODS:

1973-01-01 00:00 +0000 to 1997-04-03 12:00 +0000 (Entire dataset)

Period details by subset

Period details by subset:
1973-01-01 00:00 +0000 to 1997-04-02 00:00 +0000 (Northern Hemisphere 47x51 polar ANALYSIS grids)
1973-01-01 00:00 +0000 to 1997-03-31 12:00 +0000 (Global tropical-latitude grids)
1973-01-02 00:00 +0000 to 1997-04-03 12:00 +0000 (Northern Hemisphere 47x51 polar FORECAST grids)
1974-11-13 12:00 +0000 to 1997-04-03 12:00 +0000 (Northern Hemisphere 65x65 polar ANALYSIS grids)

VARIABLES:

Air Temperature	Geopotential Height	Humidity	Maximum/Minimum Temperature
Precipitation Amount	Sea Level Pressure	Sea Surface Temperature	Snow
Surface Air Temperature	Upper Level Winds	Vertical Wind Motion

ON84 parameter table

LEVELS:

See the detailed metadata for level information

TYPES:

Grid

COVERAGE:

Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=48.09S Northernmost=90N

Detailed coverage information

Detailed coverage information:
513km x 513km (at 22.5N), 360E to 0E and 48.09S to 48.09N (73 x 23 Mercator) (Global tropical-latitude grids)
381km x 381km (at 60N) oriented 80W (47x51 North Polar Stereographic) (Northern Hemisphere 47x51 polar ANALYSIS grids)
381km x 381km (at 60N) oriented 80W (47x51 North Polar Stereographic) (Northern Hemisphere 47x51 polar FORECAST grids)
381km x 381km (at 60N) oriented 80W (65x65 North Polar Stereographic) (Northern Hemisphere 65x65 polar ANALYSIS grids)

SOURCES:

DOC/NOAA/NWS/NCEP

National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce

PUBLICATIONS:

Jenne, Roy L., 1986: NMC Analyses (unpublished). NCAR, 14 pp.

Recommended acknowledgement for this dataset:
"The data for this study are from the Research Data Archive (RDA) which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). NCAR is sponsored by the National Science Foundation (NSF). The original data are available from the RDA (http://dss.ucar.edu) in dataset number ds066.0."

VOLUME:

15.22 GBytes (Entire dataset)

Volume details by subset

Volume details by subset:
Northern Hemisphere 47x51 polar ANALYSIS grids: 2.74 GBytes
Northern Hemisphere 65x65 polar ANALYSIS grids: 10.12 GBytes
Global tropical-latitude grids: 731.32 MBytes
Northern Hemisphere 47x51 polar FORECAST grids: 1.64 GBytes

DATA FORMATS:

NCEP ON84, DSS Octagonal Grid, DSS Tropical Grid

RELATED DATASETS:

ds060.0 - NMC B-3 Operational Model 47x51 Northern Hemisphere Tropospheric Analyses, daily 1959-1972
ds082.0 - NCEP FNL Operational Model Global Tropospheric Analyses, July 1976 to April 1997

MORE DETAILS:

View more details for this dataset, including dataset citation, data contributors, and other detailed metadata

CONTACT:

For assistance with this dataset, please contact Bob Dattore (303-497-1825) or Gregg Walters (303-497-1218) . If the specialist is unavailable, please contact Data Help.

DATA ACCESS:

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