資料庫

Brief Description:

The National Centers for Environmental Prediction (NCEP) Climate Forecast System Reanalysis (CFSR) was completed over the 31-year period of 1979 to 2009 in January 2010. The CFSR was designed and executed as a global, high resolution, coupled atmosphere-ocean-land surface-sea ice system to provide the best estimate of the state of these coupled domains over this period. The current CFSR will be extended as an operational, real time product into the future.

The CFSR relative to most, if not all, previous reanalyses include (1) coupling of atmosphere and ocean during the generation of the 6 hour guess field, (2) an interactive sea-ice model, and (3) assimilation of satellite radiances by the Grid-point Statistical Interpolation scheme over the entire period. The CFSR global atmosphere resolution is ~38 km (T382) with 64 levels extending from the surface to 0.26 hPa. The global ocean is 0.25° at the equator, extending to a global 0.5° beyond the tropics, with 40 levels to a depth of 4737m. The global land surface model has 4 soil levels and the global sea ice model has 3 levels. The CFSR atmospheric model contains observed variations in carbon dioxide (CO2) over the 1979-2009 period, together with changes in aerosols and other trace gases and solar variations. With these variable parameters, the analyzed state will include estimates of changes in the Earth system climate due to these factors.

All available conventional and satellite observations were included in the CFSR. Satellite observations were used in radiance form and were bias corrected with "spin up" runs at full resolution, taking into account variable CO2 concentrations. This procedure enabled smooth transitions of the climate record due to evolutionary changes in the satellite observing system.

CFSR atmospheric, oceanic and land surface output products are available at an hourly time resolution and 0.5° horizontal resolution. This reanalysis will serve many purposes, including providing the basis for most of NCEP Climate Prediction Center's operational climate products by defining the mean states of the atmosphere, ocean, land surface and sea ice over the next 30-year climate normal (1981-2010); provide initial conditions for historical forecasts required to calibrate operational NCEP climate forecasts (from week 2 to 9 months); and provide estimates and diagnoses of the earth's climate state, over the satellite data period, for community climate research.

Preliminary analysis of the CFSR output indicates a product far superior in most respects to the reanalysis of the mid-1990s. The previous NCEP reanalyses have been one of the most used NCEP products in history; there is every reason to believe the CFSR will supersede these older products both in scope and quality, because it is higher in time and space resolution, covers the atmosphere, ocean, sea ice and land, and was executed in a coupled mode with a more modern assimilation system and forecast model.

 

Temporal Coverage:

6-hourly values for 1979/01/01 to 2011/12/31.
monthly values for 1979/01/01 to 2011/12/31.

Spatial Coverage:

0.5 degree latitude x 0.5 degree longitude global grid (720x361). 90N - 90.0S, 0.0E - 359.5E.
1 degree latitude x 1 degree longitude global grid (360x181). 90N - 90.0S, 0.0E - 359E.
2.5 degree latitude x 2.5 degree longitude global grid (144x73). 90N - 90.0S, 0.0E - 357.5E.
T382 Gaussian (1152x576): 89.761N - 89.761S, 0E - 359.687E.
2.5 degree x 2.5 degree global grids (144x73)
T62 Gaussian (192x94): 88.542N - 88.542S, 0E - 358.125E.

Levels:

37 pressure levels (hPa): 1000, 975, 950, 925, 900, 875, 850, 825, 800, 775, 750, 700, 650, 600, 550, 500, 450, 400, 350, 300, 250, 225, 200, 175, 150, 125, 100, 70, 50, 30, 20, 10, 7, 5, 3, 2, 1.
16 isentropic levels (K): 270, 280, 290, 300, 310, 320, 330, 350, 400, 450, 550, 650, 850, 1000, 1250, 1500.
40 depth levels (m): 5, 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, 115, 125, 135, 145, 155, 165, 175, 185, 195, 205, 215, 225, 238, 262, 303, 366, 459, 584, 747, 949, 1193, 1479, 1807, 2174, 2579, 3016, 3483, 3972, 4478.

Data Format:

NetCDF and GRIB.

 

 

Data variable and Path:

  • Monthly
FILE NAME FIELD FILE NAME FIELD DEFINITION GRID RESOLUTION VERTICAL LEVELS
diabf Full-Resolution 3-D Diabatic Heating and Moistening Rates 1.0 x 1.0 Deg Lat/Lon 37 Pressure (hPa) Levels
diabl Low-Resolution 3-D Diabatic Heating and Moistening Rates 2.5 x 2.5 Deg Lat/Lon 37 Pressure (hPa) Levels
egyh High-Resolution 3-D Forecast Energetics Data 0.5 x 0.5 Deg Lat/Lon 37 Pressure (hPa) Levels
egyhnl High-Resolution 3-D Analysis Energetics Data 0.5 x 0.5 Deg Lat/Lon 37 Pressure (hPa) Levels
egyl Low-Resolution 3-D Forecast Energetics Data 2.5 x 2.5 Deg Lat/Lon 37 Pressure (hPa) Levels
egylnl Low-Resolution 3-D Analysis Energetics Data 2.5 x 2.5 Deg Lat/Lon 37 Pressure (hPa) Levels
flxf Full-Resolution Surface and Radiative Fluxes T382 Gaussian N/A
flxl Low-Resolution Surface and Radiative Fluxes T62 Gaussian N/A
ipvh High-Resolution 3-D Forecast Isentropic Data 0.5 x 0.5 Deg Lat/Lon 16 Isentropic (K) Levels
ipvhnl High-Resolution 3-D Analysis Isentropic Data 0.5 x 0.5 Deg Lat/Lon 16 Isentropic (K) Levels
ipvl Low-Resolution 3-D Forecast Isentropic Data 2.5 x 2.5 Deg Lat/Lon 16 Isentropic (K) Levels
ipvlnl Low-Resolution 3-D Analysis Isentropic Data 2.5 x 2.5 Deg Lat/Lon 16 Isentropic (K) Levels
ocnf Full-Resolution 3-D Ocean data 1.0 x 1.0 Deg Lat/Lon 40 Depth (m) Levels
ocnh High-Resolution 3-D Ocean data 0.5 x 0.5 Deg Lat/Lon 40 Depth (m) Levels
pgbh High-Resolution 3-D Forecast Pressure Level Data 0.5 x 0.5 Deg Lat/Lon 37 Pressure (hPa) Levels
pgbhnl High-Resolution 3-D Analysis Pressure Level Data 0.5 x 0.5 Deg Lat/Lon 37 Pressure (hPa) Levels
pgbl Low-Resolution 3-D Forecast Pressure Level Data 2.5 x 2.5 Deg Lat/Lon 37 Pressure (hPa) Levels
pgblnl Low-Resolution 3-D Analysis Pressure Level Data 2.5 x 2.5 Deg Lat/Lon 37 Pressure (hPa) Levels
splanl Full-Resolution Surface Analysis Data T382 Gaussian N/A
splf Full-Resolution Surface Forecast Data T382 Gaussian N/A
spll Low-Resolution Surface Forecast Data T62 Gaussian N/A
spllnl Low-Resolution Surface Analysis Data T62 Gaussian N/A
Pressure Pressure Geopotential height Temperature Zonal/Meridional wind Pressure vertical velocity
Absolute vorticity Relative humidity Precipitable water Precipitable rate  
Surface Pressure Temperature Zonal/Meridional wind Specific humidity Precipitable water
Precipitation rate Snowfall rate water equiv. Ice concentration Total cloud cover Volumetric soil moisture content
Land-sea mask Water runoff Potential evaporation rate 5-wave geopotential height anomaly
Latent heat flux Water equivalent of accum. snow depth Zonal/Meridional momentum flux Upward/Downward short wave flux
Upward/Downward long wave flux Snow phase-change heat flux Ground heat flux Zonal/ Meridional flux of gravity wave stress
Sensible heat flux Convective precip. rate Baseflow-groundwater runoff Planetary boundary layer height Cloud work function

Download:

6-hourly

Pressure level /archive/Reanalysis/NCEP_CFSR/Six_Hourly
Surface and radiative fluxes /archive/Reanalysis/NCEP_CFSR/Six_Hourly

Monthly

Pressure level /archive/Reanalysis/NCEP_CFSR/Monthly_Mean
Surface and radiative fluxes /archive/Reanalysis/NCEP_CFSR/Monthly_Mean

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