Title: Direct sun measurements of O3, SO2 and aerosol optical depth from Brewer #171
at Goddard Space Flight Center, Maryland (2001-2010) and Fairbanks, Alaska (2011-2013)

Authors:
Alexander Cede (1,2)
Gordon Labow (3,2)
William Simpson (4)
Erin Gleason (4)
Richard McPeters (2)
Jay Herman (5,2)

1 LuftBlick, Tirol, Austria
2 NASA/Goddard Space Flight Center, Maryland, USA
3 Science Systems & Applications, Inc., Maryland, USA
4 University of Alaska, Alaska, USA
5 University of Maryland Baltimore County, Maryland, USA

Abstract: We analyze vertical columns amounts of O3 and SO2 and aerosol optical depth at 320nm
from direct sun measurements with the MKIII Brewer double spectrometer #171 for two time series:
10 years at Goddard Space Flight Center, Maryland (2001-2010) and 3 years at Fairbanks, Alaska (2011-2013).
Results are compared to other ground-based and satellite data.