The GAW (Global Atmosphere
Watch) / NDACC (Network for
the Detection of Atmospheric
Composition Change) / SPARC
Upper Troposphere and Lower
Stratosphere (UTLS) Observation
Workshop, hosted by the World
Meteorological Organization
(WMO) in Geneva, Switzerland,
took place from 24-27 May 2016
and was attended by about 40
participants. The workshop aimed
to bring together a diverse group of
instrumentalists (from the groundbased,
satellite, balloon, and aircraft
communities), data analysts, and
UTLS experts to synthesize current
knowledge of chemical composition
measurements in the UTLS
