Instrument : National Centers for Environment Prediction Global Forecast System (NCEPGFS)

Instrument Categories
Derived Quantities and Models

General Overview

Since 2001, NCEP NWP forecasts (global spectral model) have been processed by Hualu Pan at NCEP/EMC and archived by Stephen Krueger at University of Utah to produce station-like column outputs at locations corresponding to the ARM and other field campaign sites. All data from Jan 2001 up to now have been re-processed by Fanglin Yang for easy access, for comparison with ARM observations, and for driving single column models and cloud resolving models.

The archived forecasts include two runs, initialized at 00Z and 12Z, respectively, and each extends up to 48 hours. Because the vertical layer of the NWP model has been changing, the archived vertical profiles on model sigma layers have been projected on both standard isobaric layers ( 1000-25 hPa, at 25-hPa resolution) and standard heights (0-20 km, 250-m resolution). Outputs on original sigma levels are also provided.

The 48-hour forecasts are saved at a three-hour interval, and saved as past 3-hour means for fluxes (radiation, sensible and latent flux, wind stress), as accumulations for snow and rainfall, and as instantaneous values for state and tendency variables (temp and wind etc).

Output Datastreams

ncepgfsatkflx : NCEP GFS: flux variables at Atqasuk
ncepgfsatkpprof : NCEP GFS: vertical profiles of met quantities at standard pressures, at Atqasuk
ncepgfsatksfc : NCEP GFS: surface variables at Atqasuk
ncepgfsatksprof : NCEP GFS: vertical profiles of met quantities at sigma layers, at Atqasuk
ncepgfsatkzprof : NCEP GFS: vertical profiles of met quantities at standard heights, at Atqasuk
ncepgfsbrwflx : NCEP GFS: flux variables at Barrow
ncepgfsbrwpprof : NCEP GFS: vertical profiles of met quantities at standard pressures, at Barrow
ncepgfsbrwsfc : NCEP GFS: surface variables at Barrow
ncepgfsbrwsprof : NCEP GFS: vertical profiles of met quantities at sigma layers, at Barrow
ncepgfsbrwzprof : NCEP GFS: vertical profiles of met quantities at standard heights, at Barrow
ncepgfsdarflx : NCEP GFS: flux variables at Darwin
ncepgfsdarpprof : NCEP GFS: vertical profiles of met quantities at standard pressures, at Darwin
ncepgfsdarsfc : NCEP GFS: surface variables at Darwin
ncepgfsdarsprof : NCEP GFS: vertical profiles of met quantities at sigma layers, at Darwin
ncepgfsdarzprof : NCEP GFS: vertical profiles of met quantities at standard heights, at Darwin
ncepgfsflx : NCEP GFS: flux variables
ncepgfsmanflx : NCEP GFS: flux variables at Manus
ncepgfsmanpprof : NCEP GFS: vertical profiles of met quantities at standard pressures, at Manus
ncepgfsmansfc : NCEP GFS: surface variables at Manus
ncepgfsmansprof : NCEP GFS: vertical profiles of met quantities at sigma layers, at Manus
ncepgfsmanzprof : NCEP GFS: vertical profiles of met quantities at standard heights, at Manus
ncepgfsnauflx : NCEP GFS: surface variables at Nauru
ncepgfsnaupprof : NCEP GFS: vertical profiles of met quantities at standard pressures, at Nauru
ncepgfsnausfc : NCEP GFS: flux variables at Nauru
ncepgfsnausprof : NCEP GFS: vertical profiles of met quantities at sigma layers, at Nauru
ncepgfsnauzprof : NCEP GFS: vertical profiles of met quantities at standard heights, at Nauru
ncepgfspprof : NCEP GFS: vertical profiles of met quantities at standard pressures
ncepgfssfc : NCEP GFS: surface variables
ncepgfssprof : NCEP GFS: vertical profiles of met quantities at sigma layers
ncepgfszprof : NCEP GFS: vertical profiles of met quantities at standard heights