WACCM results for a subset of the globe and a range of dates can be downloaded from this page. Output is provided every 6 hours. Each request is provided as a single netcdf file. We strongly recommend that you download a single day for your region to check the file size and then request a range of dates that will result in a manageable file size.
The WACCM forecasts are driven by meteorological fields from the NASA GMAO GEOS-5 model. This simulation uses anthropogenic emissions from CEDS provided for CMIP6, with emissions for 2014 used for this year. Open fire emissions are from FINN-v1 (Wiedinmyer et al., Geosci. Model Devel., 2011). The results are at 0.9x1.25 degrees with 88 levels. Each file (global for 1 day) is 8 GB; to retrieve the files via http, please register for WACCM direct download.
If you would like to be notified when WACCM forecast data is not going to be available, please subscribe to the ACOM Forecast Notification list.
For inquiries regarding WACCM output please register for and submit questions to the CESM Forum.
The 'date' and 'datesec' variables contain the date and time of the WACCM output. To verify the date of the downloaded files, please use 'ncdump -v date'. The program ncview does not properly interpret the 'time' variable and calculates an erroneous date.
WACCM results are available from one year ago until 10 days from now. Requests for time spans longer than 32 days are not supported.
CO01: global biomass burning
CO02: North America anthropogenic
CO04: Northern Africa
CO05: Western Asia
CO06: East Asia
CO07: South America
CO08: Southern Africa