Abstract
During the NASA 2016 KORUS-AQ campaign, the ground based NASA GSFC ozone lidar 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 lidar profiles of ozone were measured. Select days are shown to represent key ozone events that occurred at the rural site.
Highlights
In order to better assess pollution emission sources and plume evolution in Asia, there has been an international effort to launch the Geostationary Environmental Monitoring Spectrometer (GEMS) to provide hourly measurements of key pollutants (e.g. ozone; nitrogen dioxide (NO2); sulfur dioxide (SO2); particulate matter) over the Korean peninsula and the Asia-Pacific region
The work mainly utilizes the synergy of available data to focus on high ozone events at a downwind from Seoul (30 km southeast, Figure 1a) rural site (Taehwa Research Forest, TRF)
O3 with concentrations near 100 ppbv are mixed to near 1700 m ASL by 19:00 KST and result in a residual layer residing at nearly the same height the following morning
Summary
In order to better assess pollution emission sources and plume evolution in Asia, there has been an international effort to launch the Geostationary Environmental Monitoring Spectrometer (GEMS) to provide hourly measurements of key pollutants (e.g. ozone; nitrogen dioxide (NO2); sulfur dioxide (SO2); particulate matter) over the Korean peninsula and the Asia-Pacific region. 2.1 GSFC Ozone DIAL Vertical profiles of O3 were measured using the NASA Goddard Space Flight Center TROPospheric OZone Differential Absorption Lidar (GSFC TROPOZ DIAL or TROPOZ [2]) in support of the KORUS-AQ study. The TROPOZ system, a charter NASA instrument in the Tropospheric Ozone Lidar Network (TOLNet, http://www-air.larc.nasa.gov/missions/TOLNet/), derives O3 concentrations to mostly within 1015% as compared to nearby O3-sonde profiles [3] and has been previously utilized to characterize O3 episodes such as stratospheric-tropospheric exchange [4], terrain driven recirculation/transport events [5,6], and regional transport events.
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