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ERA40 T106 Monthly Mean Analysis Fields on Pressure Surfaces, created at NCAR
Entry ID: NCAR_DS129.1

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Summary

Abstract: DS129.1 represents a higher resolution version of ds126.1 [http://dss.ucar.edu/datasets/ds126.1/]. Both ds126.1 and 129.1 were implemented and computed by NCAR's Data Support Section, and form an essential part of efforts undertaken in late 2004, early 2005, to produce an archive of selected segments of ERA-40 on a standard transformation grid. In the case of ds127.1, ERA-40 monthly mean upper air variables (designated as %93MODA%94 or %93moda%94 below) on 23 pressure levels were transformed from either spherical harmonics (geopotential, temperature, vertical pressure velocity, vorticity, divergence, relative humidity), or a reduced N80 Gaussian grid (potential vorticity, specific humidity, ozone mass mixing ratio), to a 320x160 regular Gaussian grid at T106 spectral truncation. In addition, horizontal wind components were derived from spectral vorticity and divergence and also archived on a T106 Gaussian grid. All scalar fields were transformed using routines from the ECMWF EMOS library, whereas the horizontal winds were obtained using NCAR's Spherepack library. The ERA-Interim data from ECMWF is an update to the ERA-40 project. The ERA-Interim data starts in 1989 and has a higher horizontal resolution (T255, N128 nominally 0.703125 degrees) than the ERA-40 data (T159, N80 nominally 1.125 degrees). ERA-Interim is based on a more current model than ERA-40 and uses 4-D VAR (as apposed to 3-D VAR in ERA-40). ECMWF will continue to run the ERA-Interim model in near real time thru at least 2010, and possibly longer. This data is available in ds627.0 [http://dss.ucar.edu/datasets/ds627.0].

Related URL

Link: VIEW RELATED INFORMATION

Link: VIEW RELATED INFORMATION
Description: ECMWF's ERA40 web site

Geographic Coverage

N: 89.142 S: -89.142 E: 180.0 W: -180.0

Data Set Citation

Dataset Originator/Creator: UCAR/NCAR/CISL/DSS > Data Support Section, Computational and Information Systems Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research
Dataset Title: ERA40 T106 Monthly Mean Analysis Fields on Pressure Surfaces, created at NCAR
Dataset Publisher: UCAR/NCAR/CISL/DSS > Data Support Section, Computational and Information Systems Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research
Online Resource: http://dss.ucar.edu/datasets/ds129.1/

Temporal Coverage

Start Date: 1957-09-01

Stop Date: 2002-08-31

Data Resolution
Latitude Resolution: 1.125 degrees
Longitude Resolution: 1.121 degrees

Science Keywords

ATMOSPHERE >AIR QUALITY >TROPOSPHERIC OZONE    [Definition]

ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]

ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY    [Definition]

ATMOSPHERE >ATMOSPHERIC WINDS >CONVERGENCE/DIVERGENCE    [Definition]

ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS    [Definition]

ATMOSPHERE >ATMOSPHERIC WINDS >VERTICAL WIND MOTION    [Definition]

ATMOSPHERE >ATMOSPHERIC WINDS >VORTICITY    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Project

ESIP >Earth Science Information Partners Program [Information]

ERA40 >ECMWF ERA40 Reanalysis Project [Information]

Access Constraints

We are allowed to distribute this data to US scientists, scientists visiting US organizations, and Canadian scientists affiliated with UCAR member organizations only.

Use Constraints

The data can be used for non-commercial research only.

Keywords

ERA40DAS > ERA40 Data Assimilation System

Data Set Progress

COMPLETE

Data Center

Data Support Section, Computational and Information Systems Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research [Information]
Data Center URL: http://rda.ucar.edu/
Dataset ID: 129.1

Data Center Personnel

Name: RDA HELP DESK
Phone: (303)-497-1231
Fax: (303)-497-1291
Email: dssweb at ucar.edu
Contact Address:
National Center for Atmospheric Research
CISL/DSS
P.O. Box 3000
City: Boulder
Province or State: CO
Postal Code: 80307
Country: U.S.A.

Distribution

Distribution_Size: 14.015 Gbytes

Distribution_Format: GRIB1 > GRIdded Binary form, Edition 1

Personnel

DAVE STEPANIAK
Role: TECHNICAL CONTACT
Phone: (303)-497-1343
Fax: (303)-497-1291
Email: davestep at ucar.edu
Contact Address:
National Center for Atmospheric Research
CISL/DSS
P.O. Box 3000
City: Boulder
Province or State: CO
Postal Code: 80307
Country: U.S.A.

BOB DATTORE
Role: DIF AUTHOR
Phone: (303)-497-1825
Fax: (303)-497-1291
Email: dattore at ucar.edu
Contact Address:
National Center for Atmospheric Research
CISL/DSS
P.O. Box 3000
City: Boulder
Province or State: CO
Postal Code: 80307
Country: U.S.A.

Creation and Review Dates

Last DIF Revision Date: 2011-01-24

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