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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).

Data Set Citation

Dataset Creator
Earth Simulator Center
Dataset Title
ALERA AFES-LETKF experimental ensemble reanalysis

Personnel

Role
TECHNICAL CONTACT
Contact
Application Laboratory JAMSTEC (esc-oreda@jamstec.go.jp)
Role
DIF AUTHOR
Contact
dmo@jamstec.go.jp (dmo@jamstec.go.jp)

Keyword List

ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
GEOSCIENTIFIC INFORMATION
Parameter
EARTH SCIENCE>ATMOSPHERE>ALTITUDE>GEOPOTENTIAL HEIGHT
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC TEMPERATURE>AIR TEMPERATURE
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC WINDS
EARTH SCIENCE>OCEANS>OCEAN PRESSURE>SEA LEVEL PRESSURE
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC TEMPERATURE>DEW POINT TEMPERATURE
Platform
GCM>General Circulation Model
REANALYSIS MODELS
Other
JAMSTEC

Start Date - End Date

  • 2005-06-01 - 2007-01-10

Bounding Rectangle

South Bound
-90.0
North Bound
90.0
West Bound
-180.0
East Bound
180.0
Minimum Altitude ( HPA)
1000
Maximum Altitude ( HPA)
10

Data Resolution

Latitude Resolution
1.25 degree
Longitude Resolution
1.25 degree
Horizontal Resolution Range
100 km - < 250 km or approximately 1 degree - < 2.5 degrees
Vertical Resolution
1000 -10 hPa (increments of 100 hPa, 50 hPa, 10 hPa)
Temporal Resolution
6 hours, 1 day, 5 days, 1 month

Use Constraints

Please refer to Terms and Conditions at https://www.jamstec.go.jp/alera/alera_terms.html .

Language

ENGLISH
JAPANESE

Originating Center

JAMSTEC

Organization

Organization Type
ORIGINATOR
Organization Name
Short Name
JAMSTEC
Long Name
Japan Agency for Marine-Earth Science and Technology
Personnel
Role
DATA CENTER CONTACT
Contact
dmo@jamstec.go.jp (dmo@jamstec.go.jp)

Related URL

Description
ALERA AFES-LETKF experimental ensemble reanalysis - Catalog Page

Last Metadata Revision Date

2022-11-17