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ERA40 T106 Analysis Fields on Pressure Surfaces, created at NCAR
Entry ID: NCAR_DS127.1

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Summary

Abstract: DS127.1 represents a higher resolution version of ds124.1 [http://dss.ucar.edu/datasets/ds124.1/]. Both ds124.1 and 127.1 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 6-hourly upper air variables 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 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/ds127.1/

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.

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: 127.1

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: 1.706 Tbytes

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.

Publications/References

Hoare, R.A. Popplewell, K.B. House, D.A. Henderson, R.A. Prebble, W.M. Wilson, A.T. 1964 Lake Bonney, Taylor Valley, Antarctica: a natural solar energy trap. Nature 202(4935): 886-888

Hoare, R.A. Popplewell, K.B. House, D.A. Henderson, R.A. Prebble, W.M. Wilson, W.T. 1965 Solar heating of Lake Fryxell: a permanently ice-covered Antarctic lake. Journal of geophysical research 70(6): 1555-1558

Hoare, R.A. 1966 Problems of heat transfer in Lake Vanda, a density stratified Antarctic lake. Nature 210(5038): 787-789

Hoare, R.A. 1968 Thermohaline convection in Lake Vanda, Antarctica. Journal of geophysical research 73(2): 607-612

Henderson, R.A. Prebble, W.M. Hoare, R.A. House, D.A. Popplewell, K.B. Wilson, A.T. 1966 An ablation rate for Lake Fryxell, Victoria Land, Antarctica. Journal of glaciology 6(43): 129-133

Boswell, C.R. Brooke, R.R. Wilson, A.T. 1967 Trace element content of Antarctic lakes. Nature 213(5072): 167-168

Boswell, C.R. Brooke, R.R. Wilson, A.T. 1967 Some trace elements in lakes of McMurdo Oasis, Antarctica. Geochimica et cosmochimica acta 31(5): 731-736

Wilson, A.T. 1964 Evidence from chemical diffusion of a climatic change in the McMurdo Dry Valleys 1,200 years ago. Nature 201(4915): 176-177

Wilson, A.T. 1965 Escape of algae from frozen lakes and ponds. Ecology 46(3): 376

Wilson, A.T. House, D.A. 1965 Chemical composition of south polar snow. Journal of geophysical research 70(22): 5515-5518

Wilson, A.T. 1967 The lakes of the McMurdo Dry Valleys. Tuatara 15(3): 152-164

House, D.A. Hoare, R.A. Popplewell, K.B. Henderson, R.A. Prebble, W.W. Wilson, A.T. 1966 Chemistry in the Antarctic. Journal of chemical education 43(9): 502-505

Creation and Review Dates

DIF Creation Date: 2009-06-24

Last DIF Revision Date: 2009-07-02

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