AMPS Archive Information

The AMPS archive contains forecast model output and related files from the Antarctic Mesoscale Prediction System.

GRIB subsets of the AMPS forecast output are available beginning January 2001.

Original model output files in NetCDF format are available only for the most recent months. Because of the data volume, these files need to be scrubbed from the archive after several months.

The model fields that are in the GRIB files are listed here: GRIB fields. The GRIB parameter numbers, field units, and field abbreviations are also shown in this document.

Dataset: AMPS WRF 24 Output
Forecast output from the AMPS WRF 24/8/2.67/0.89-km grid configuration (Dates: 10 Oct 2017 — Present)

Grid Index	Grid Cell Size	Region	output interval	forecast time range
AMPS domain 1	24-km	Antarctica and Southern Oceans	3-hourly	0-120 hours
AMPS domain 2	8-km	Antarctic Continent	3-hourly	0-120 hours
AMPS domain 3	2.67-km	Ross Sea / Ross Ice Shelf / South Pole	1-hourly	0-39 hours
AMPS domain 5	0.89-km	Ross Island and Vicinity	1-hourly	0-39 hours
AMPS domain 6	2.67-km	Antarctic Peninsula	1-hourly	0-39 hours

Original NetCDF WRF output files for each grid. Only the most recent months (less than a year) are saved in a rolling archive. Access with URLs built according to the pattern:
- https://tds.ucar.edu/thredds/fileServer/glade/campaign/collections/amps/NETCDF/<YYYYMM>/<YYYYMMDDHH>/wrfout_d<GG>_<YYYYMMDDHH>_f<FFF>.nc
where:
- <YYYYMM>and <YYYYMMDDHH> reference the forecast initilization time.
- <FFF> is the three-digit forecast lead time in hours past the initialization time.
- <GG> is the two-digit WRF grid identifier: 01, 02, 03, 05, or 06.
GRIB subsets of the model output for each grid. Access with URLs built according to the pattern:
- https://tds.ucar.edu/thredds/fileServer/glade/campaign/collections/amps/GRIB/WRF24/<YYYY>/<MM>/<DD>/<YYYYMMDDHH>_WRF_d<G>_f<FFF>.grb
where:
- <YYYY>, <MM>, <DD>, and <YYYYMMDDHH> reference the forecast initilization time.
- <FFF> is the three-digit forecast lead time in hours past the initialization time.
- <G> is the single-digit WRF grid identifier: 1, 2, 3, 5, or 6.
AMPS forecast graphics and tables posted to the AMPS web page (Approx. 6.5 GB per forecast)

Dataset: AMPS WRF 30 Output
Forecast output from the AMPS WRF 30/10/3.3/1.1-km grid configuration (Dates: 8 Apr 2013 — 10 Oct 2017)

Grid Index	Grid Cell Size	Region	output interval	forecast time range
AMPS domain 1	30-km	Antarctica and Southern Oceans	3-hourly	0-120 hours
AMPS domain 2	10-km	Antarctic Continent	3-hourly	0-120 hours
AMPS domain 3	3.3-km	Ross Sea / Ross Ice Shelf / South Pole	1-hourly	0-39 hours
AMPS domain 5	1.1-km	Ross Island and Vicinity	1-hourly	0-39 hours
AMPS domain 6	3.3-km	Antarctic Peninsula	1-hourly	0-39 hours

GRIB subsets of the model output for each grid. Access with URLs built according to the pattern:
- https://tds.ucar.edu/thredds/fileServer/glade/campaign/collections/amps/GRIB/WRF30/<YYYY>/<MM>/<DD>/<YYYYMMDDHH>_WRF_d<G>_f<FFF>.grb
where:
- <YYYY>, <MM>, <DD>, and <YYYYMMDDHH> reference the forecast initilization time.
- <FFF> is the three-digit forecast lead time in hours past the initialization time.
- <G> is the single-digit WRF grid identifier: 1, 2, 3, 5, or 6.
AMPS forecast graphics and tables posted to the AMPS web page (Approx. 1.5 GB)

Dataset: AMPS WRF 30 Output
Forecast output from the AMPS WRF 30/10/3.3/1.1-km grid configuration (Dates: 14 Jan 2013—8 Apr 2013)

Grid Index	Grid Cell Size	Region	output interval	forecast time range
AMPS domain 1	30-km	Antarctica and Southern Oceans	3-hourly	0-120 hours
AMPS domain 2	10-km	Antarctic Continent	3-hourly	0-120 hours
AMPS domain 3	3.3-km	Ross Sea / Ross Ice Shelf	1-hourly	0-39 hours
AMPS domain 4	3.3-km	South Pole	1-hourly	0-39 hours
AMPS domain 5	1.1-km	Ross Island and Vicinity	1-hourly	0-39 hours
AMPS domain 6	3.3-km	Antarctic Peninsula	1-hourly	0-39 hours

GRIB subsets of the model output for each grid
AMPS forecast graphics and tables posted to the AMPS web page (Approx. 860 MB)

Dataset: AMPS WRF 45 Output
Forecast output from the AMPS WRF 45/15/5/1.67-km grid configuration (Dates: 01 Oct 2008—14 Jan 2013)

GRIB subsets of the model output for each grid (Beginning 29 Oct 2008, approx. 1.5 GB for all six grids)
AMPS forecast graphics and tables posted to the AMPS web page (Approx. 860 MB)

Dataset: AMPS WRF 60 Output
Forecast output from the AMPS WRF 60/20/6.67/2.22-km grid configuration (Dates: 06 Mar 2006—03 Nov 2008)

GRIB subsets of the model output for each grid.

Dataset: AMPS MM5 60 Output
Forecast output from the AMPS MM5 60/20/6.67/2.22-km grid configuration (Dates: 17 Sep 2005—30 Jun 2008)

GRIB subsets of the model output for each grid.

Dataset: AMPS MM5 90 Output
Forecast output from the AMPS MM5 90/30/10-km grid configuration (Dates: 05 Jan 2001—19 Dec 2005)

GRIB subsets of the model output for each grid.

Domains

The AMPS forecast domains are currently designated d01, d02, d03, d05, and d06 in these files, and they cover the following areas.

d01— Domain 1: Antarctica and Southern Ocean (30-km grid)
d02— Domain 2: Antarctic Continent (10-km grid)
d03— Domain 3: Ross Sea Sector (includes South Pole area) (3.3-km grid)
d05— Domain 5: Ross Island (1.1-km grid)
d06— Domain 6: Antarctic Peninsula (3.3-km grid)

The AMPS forecast domains through April 2013 were designated d01, d02, d03, d04, d05, and d06 in these files, and they covered the following areas.

d01— Domain 1: Antarctica and Southern Ocean (30-km, 45-km, or 60-km grid)
d02— Domain 2: Antarctic Continent (10-km, 15-km, or 20-km grid)
d03— Domain 3: Western Ross Sea (3.3-km, 5-km, or 6.67-km grid)
d04— Domain 4: South Pole (3.3-km, 5-km, or 6.67-km grid)
d05— Domain 5: Ross Island (1.1-km, 1.67-km, or 2.22-km grid)
d06— Domain 6: Antarctic Peninsula (3.3-km, 5-km, or 6.67-km grid)

The current AMPS forecast domains are shown below. The full set of five is in the top plot, and a view of the four grids on the continent is in the bottom plot. Full information on the AMPS grids may be found here: http://www2.mmm.ucar.edu/rt/amps/information/configuration/maps_2017101012/maps.html.

File Formats

For information on NetCDF, see: http://www.unidata.ucar.edu/software/netcdf/. For more information on the fields in WRF output files, explore this section of the WRF Users' Guide at http://www2.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap5.htm#fields.

Last modified: 2022-02-16 Wed 12:09:52 MST