Boulder 2018-2020
TOPAZ data
Lidar instruments

Boulder 2018-2020 TOPAZ Data

March 23, 2018

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Daily Summary:

Friday, March 23
TOPAZ data were recorded from 09:38 - 18:42 MDT. TROPOMI overpass at 14:07 MDT @ 93.44 km. Ozone sonde launched @ 11:45 MDT. Today the measurements captured the advection of a large stratospheric intrusion forecast by both the RAP-Chem and RAQMS models across Boulder. After a low ozone (~20 ppbv) morning, ozone mixing ratios in excess of 150 ppbv were observed between 6 and 8 km asl, and 3 filaments with 75-80 ppbv of ozone descended to within 2 km of the surface during a period of strong winds between 1000 and 1800 MDT. The intrusion did not directly reach the surface however, and the 2B in situ measurements showed ozone gradually increased to about 55 ppbv over the course of the day. The UTLS air caused the skies to be exceptionally transparent with too little aerosol for Doppler lidar wind measurements beyond 1 km.

Note: Data are preliminary.

Note: Data are preliminary.

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Ozone - March 23

Aerosol Backscatter
Aerosol Backscatter - March 23

in situ surface data
in situ surface data - March 23

ozone sonde
ozone sonde - March 23