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Summary
ABSTRACT: NCEP EDAS and GDAS Model Data is digital data set DSI-6141, archived at the National Climatic Data Center (NCDC). The National Centers for Environmental Prediction (NCEP), part of the US National Weather Service (NWS), runs a series of computer analyses and forecasts operationally that use or produce model data. DSI-6141 is one of these sets of NCEP model data that is archived at ... NCDC. DSI-6141 is actually a pair of closely related data sets, sometimes referred to at NCDC as EDAS (DSI-6141A), and GDAS or Final (FNL) (DSI-6141B). Eta Data Assimilation System (EDAS) has been run since 1995 and covers only the geographical US. It is an intermittent assimilation system consisting of successive 3 hourly Eta model forecasts and Optimum Interpolation analyses on a 40 km grid. The Air Resources Laboratory (ARL) extracts every second grid point to produce a 3 hourly 80 km grid, which is archived at NCDC. Major parameters in EDAS are (1) Surface parameters: Surface and sea level pressure; temperature at surface and at 2m above ground level (AGL); 3-hourly total and convective accumulated precipitation; soil moisture content; relative humidity at 2m AGL; u- and v-components of wind at 10m AGL; snow (yes/no); rain (yes/no); latent and sensible heat net flux at surface; low, medium, and high cloud cover; and downward short wave radiation flux. (2) Upper air parameters: U- and v-components of wind with respect to grid; geopotential height; temperature; pressure vertical velocity; and relative humidity. The Global Data Assimilation System (GDAS) part of this data set has archived data at NCDC back to 1997 and is a global data set. GDAS is the final run in the series of NCEP operational runs; it is therefore sometimes known as the Final Run (FNL). It is run 4 times a day for 00, 06, 12, and 18 UTC. Model output is for the analysis time and a 6-hourly forecast. NCEP post-processing of GDAS converts the data from spectral coefficient form to 1 degree latitude-longitude (360 by 181) grids and from sigma levels to mandatory pressure levels. ARL converts the data to 129 by 129 polar stereographic grids for each hemisphere. The ARL version is the data archived at NCDC. Major parameters in GDAS (FNL) are: (1) Surface parameters: Surface and sea level pressure; temperature at surface and at 2m above ground level (AGL); 6-hourly total precipitation; u- and v-components of momentum flux at surface; latent and sensible heat flux at surface; downward short wave radiation flux at surface; relative humidity at 2m AGL; u- and v-components of wind at 10m AGL; soil moisture content; and total cloud cover. (2) Upper air parameters: U- and v-components of wind with respect to grid; geopotential height; temperature; pressure vertical velocity; and relative humidity. GDAS begins in 1997. NCEP global model data for the period 1991-1996 is archived at NCDC as digital data set DSI-6140, NCEP Nested Grid Model (NGM) and Medium Range Forecast (MRF) Archive.

PURPOSE: To make a wide range of climatic data available to researchers and the public.

SUPPLEMENTAL INFORMATION: data set

CURRENTNESS REFERENCE: Ground Condition

Geographic Coverage Spatial coordinates   

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Dataset Title: NCEP EDAS and GDAS (FNL) Model Data (DSI-6141) Dataset Release Date: Unknown Data Presentation Form: model Online Resource: http://www.ncdc.noaa.gov

Temporal Coverage

Start Date: 1997-01-01

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Data Resolution

Temporal Resolution: 6 Hours Temporal Resolution Range: Hourly - < Daily Latitude Resolution: 40 Km Longitude Resolution: 40 Km Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree Temporal Resolution: 3 Hours Temporal Resolution Range: Hourly - < Daily Latitude Resolution: 80 Km Longitude Resolution: 80 Km Horizontal Resolution Range: 50 km - < 100 km or approximately .5 degree - < 1 degree Temporal Resolution: 3 hours Temporal Resolution Range: Hourly - < Daily

Science Keywords

ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE TENDENCY ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE ATMOSPHERE > ATMOSPHERIC RADIATION > HEAT FLUX ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE AIR TEMPERATURE ATMOSPHERE > ATMOSPHERIC TEMPERATURE > TEMPERATURE PROFILES ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS ATMOSPHERE > ATMOSPHERIC WINDS > VERTICAL WIND MOTION ATMOSPHERE > CLOUDS > CLOUD AMOUNT/FREQUENCY ATMOSPHERE > CLOUDS > CLOUD HEIGHT ATMOSPHERE > CLOUDS > CLOUD VERTICAL DISTRIBUTION ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT ATMOSPHERE > PRECIPITATION > RAIN ATMOSPHERE > PRECIPITATION > SNOW LAND SURFACE > SOILS > SOIL HEAT BUDGET LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT ATMOSPHERE > CLOUDS > CLOUD TYPES LAND SURFACE > LAND TEMPERATURE > LAND HEAT CAPACITY LAND SURFACE > LAND TEMPERATURE > LAND SURFACE TEMPERATURE ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROFILES TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW COVER

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE ELEVATION ENVIRONMENT GEOSCIENTIFIC INFORMATION

Platform

MODELS

Project

ESIP > Earth Science Information Partners Program

Quality
LOGICAL CONSISTENCY REPORT: Unknown

COMPLETENESS REPORT: Completeness information not available.

LINEAGE/PROCESS STEP:
PROCESS DESCRIPTION: This data set is taken directly from the Storm Data Publication.
PROCESS DATE: Unknown

Access Constraints
ACCESS CONSTRAINTS: None

DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Use Constraints
None

Ancillary Keywords

GLOBAL GOSIC G3OS/

Data Set Progress

IN WORK

Data Center

National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Data Center URL: http://www.ncdc.noaa.gov/ Dataset ID: ______DSI-6141 ____ Data Center Personnel Name: NCDC CUSTOMER SERVICE Phone: 828-271-4800 Fax: 828-271-4876 Email: ncdc.orders at noaa.gov Contact Address: 151 Patton Avenue, Room 120 City: Asheville Province or State: NC Postal Code: 28801-5001 Country: USA

Personnel

NCDC CUSTOMER SERVICE Role: DIF AUTHOR Phone: 828-271-4800 Fax: 828-271-4876 Email: ncdc.orders at noaa.gov Contact Address: 151 Patton Avenue, Room 120 City: Asheville Province or State: NC Postal Code: 28801-5001 Country: USA

Related URL

Link: VIEW EXTENDED METADATA Description: View Source Metadata document from the Metadata Manager and Repository (NMMR).

Creation and Review Dates

DIF Creation Date: 2006-12-01 Last DIF Revision Date: 2008-01-02

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