October 31, 2019

README for file GDOC_ver1.nc

Corresponding Citation:
https://amt.copernicus.org/articles/13/2733/2020/

GDOC_ver1.nc is a NetCDF file containing the GEOS-GMI Diurnal Ozone Climatology.
The climatology is based on model output from the NASA GEOS-GMI simulation
running concurrent with SAGE III observations (output currently available for
2017-2018). The simulation is based on the NASA GMAO GOES-5 GCM run in reply
mode constrained to 3-hourly MERRA-2 dynamical fields. The model in run at C90
with a spatial resolution of 1 deg. longitude by 1 deg. latitude. Model output
is available every 30 minutes. 

The climatology is constructed by binning half-hourly model output as a function
of latitude (5-degree latitude bins), month and local solar time (30-minute
bins). The vertical coordinate is zstar pressure levels, defined as 
prlevs=1013.25/10^(z/16.) where z varies from 0-80km. However the climatology is
only reported at levels between 100 hPa and 0.3 hPa. Above 0.3 hPa the
model output have not been evaluated. The climatology is reported down to 100
hPa though it has not been evaluated below 30 hPa. The values are reported as a
ratio of the value at midlight local solar time. 

Contact Person: Stacey Frith (stacey.m.frith@nasa.gov)
Model Output Contact Person: Luke Oman (luke.d.oman@nasa.gov)

For assistance reading the file, please contact Stacey Frith.