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September 18, 2015

An aerosol layer at ~1.4 km can be seen on the raw backscatter curtains. The PBL O3 measured by the lidar today (Sep. 18) is high for fall and is consistent with the ozonesonde observation (HU935) made on Sep. 19. The O3 and potential T profiles measured by the ozonsonde profile HU934 one week ago suggest a tropopause fold event on Sep. 12 or slightly before.