Classification
GRAD - Earth atmosphere, weather
15
UMC - Atmospheric physics
4
UMD - Atmospheric models
3
GKAF - Geomagnetism
2
GRA - Meteorology
2
GXAA - Polar research - arctic region
2
UMB - Atmospheric chemistry
2
GRAN - Wind
1
GRB - Climatology
1
GRBA - Climatology - general
1
GRBK - Climatological data
1
GRBN - Climatological models
1
PEGC - Propagation and transmission of optical waves
1
UMN - Air pollution control and measurement
1