Improved Observations from the GSFC Ozone Lidar at the Mt. Taehwa Forest Site in South Korea in May–June 2016

During the NASA 2016 KORUS-AQ campaign, ground based and balloon borne instrumentation were deployed to the remote Taehwa Forest site (37.3 N, 127.3 E, 151 m AGL) to characterize the transport of pollution downwind of the Seoul metropolitan region. On most days from 02 May to 10 June 2016, continuous hours of profiles of ozone were measured from the NASA GSFC TROPospheric OZone (TROPOZ) DIAL instrument. Several upgrades were made to the TROPOZ instrument prior to deployment, which resulted in ozone profiles being extended down to nearly 200 m AGL and extending to 6-8 km during daytime.  Daily ozonesondes were also launched and a surface analyzer continuously measured in situ ozone. Comparisons between the co-located ozone lidar and sonde profiles will be shown, highlighting the improvements made to the near field ozone retrieval. With the emerging system of geostationary air quality satellites, the scientific observing capability of the TROPOZ system (along with ozonesondes and in-situ data) is presented as an ideal system for quantifying tropospheric composition and improving/validating satellite retrievals. Additional data will be presented as it becomes available.