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ALERA AFES-LETKF experimental ensemble reanalysis
Entry ID: ALERA

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Summary

Abstract: ALERA is an experimental atmospheric reanalysis dataset for about one and a half years from 1 May 2005 produced on the Earth Simulator. It provides not only the ensemble mean but also spread of the ensemble members. The spread could be used as a measure of the analysis error.

This datatset is produced under the collaboration among the Japan Meteorological Agency (JMA), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), and Chiba Institute of Science (CIS). ALERA may be used for research purposes for free under the terms and conditions .

AFES (AGCM for the Earth Simulator) is run at a resolution of T159/L48 (about 80-km in the horizontal and 48 layers in the vertical). The ensemble size is chosen to be 40. Observational data excluding satellite radiances are assimillated using the LETKF (local ensemble transform Kalman filter).

Related URL

Link: GET DATA
Description: ALERA AFES-LETKF experimental ensemble reanalysis - Home Page

Geographic Coverage

N: 90.0 S: -90.0 E: 180.0 W: -180.0
Min Altitude: 1000 HPA Max Altitude: 10 HPA

Data Set Citation

Dataset Originator/Creator: The Earth Simulator Center, JAMSTEC
Dataset Title: ALERA AFES-LETKF experimental ensemble reanalysis
Online Resource: http://www.jamstec.go.jp/esc/afes/alera/about.html

Temporal Coverage

Start Date: 2005-06-01

Stop Date: 2007-01-10

Data Resolution
Latitude Resolution: 1.25 degree
Longitude Resolution: 1.25 degree
Vertical Resolution: 1000 -10 hPa (increments of 100 hPa, 50 hPa, 10 hPa)
Temporal Resolution: 6 hours, 1 day, 5 days, 1 month

Science Keywords

ATMOSPHERE >ALTITUDE >GEOPOTENTIAL HEIGHT    [Definition]

ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]

ATMOSPHERE >ATMOSPHERIC WINDS    [Definition]

OCEANS >OCEAN PRESSURE >SEA LEVEL PRESSURE    [Definition]

ATMOSPHERE >ATMOSPHERIC TEMPERATURE >DEW POINT TEMPERATURE    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
GEOSCIENTIFIC INFORMATION

Platform

GCM >General Circulation Model [Information]

Use Constraints

Please refer to Terms and Conditions at http://www.jamstec.go.jp/esc/afes/alera/terms.html

Data Set Progress

COMPLETE

Data Center

Japan Agency for Marine-Earth Science and Technology, Japan [Information]
Data Center URL: http://www.jamstec.go.jp/e/

Data Center Personnel

Name: DATA MANAGEMENT OFFICE
Email: dmo at jamstec.go.jp
Contact Address:
Japan Agency for Marine-Earth Science and Technology
3173-25 Showa-machi, Kanazawa-ku
City: Yokohama
Province or State: Kanagawa
Postal Code: 236-0001
Country: Japan

Personnel

JAMSTEC THE EARTH SIMULATOR CENTER
Role: TECHNICAL CONTACT
Email: esc-aosg at jamstec.go.jp
Contact Address:
Japan Agency for Marine-Earth Science and Technology
3173-25 Showa-machi, Kanazawa-ku
City: Yokohama
Province or State: Kanagawa
Postal Code: 236-0001
Country: Japan

DATA MANAGEMENT OFFICE
Role: DIF AUTHOR
Email: dmo at jamstec.go.jp
Contact Address:
Japan Agency for Marine-Earth Science and Technology
3173-25 Showa-machi, Kanazawa-ku
City: Yokohama
Province or State: Kanagawa
Postal Code: 236-0001
Country: Japan

Creation and Review Dates

DIF Creation Date: 2009-05-14

Last DIF Revision Date: 2010-03-02

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