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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/amt-2018-337
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Oct 2018

Research article | 24 Oct 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Upgrade and automation of the JPL Table Mountain Facility tropospheric ozone lidar (TMTOL) for near-ground ozone profiling and satellite validation

Fernando Chouza, Thierry Leblanc, Mark Brewer, and Patrick Wang Fernando Chouza et al.
  • Jet Propulsion Laboratory, California Institute of Technology, Wrightwood, CA, USA

Abstract. As part of the international efforts to monitor air quality, several satellite missions were deployed (e.g. TROPOMI) and others, like TEMPO, are planned for the near future. In support of the validation of these missions, major upgrades to the tropospheric ozone lidar located at the Jet Propulsion Laboratory Table Mountain Facility (TMF) were recently performed. These modifications include the full automation of the system, which now allows unattended measurements during frequent satellite overpasses, and a new receiver that extends the measurement capabilities of the system down to 100m above surface.

The automation led to the systematic operation of the lidar during daily TROPOMI overpasses, providing more than 139 reference profiles since January 2018. Ozone profiles retrieved using the new lidar receiver were compared to ozonesonde profiles obtained from a collocated tethered balloon. An agreement of 5% or better with the ozonesonde down to an altitude range of 100-m above ground was demonstrated. Furthermore, the stability of the receiver configuration was investigated. Comparisons between the lowest point retrieved by the lidar and a co-located surface ozone photometer showed no sign of drift over a two-month test period. Finally, measurements from a 24-hour intensive measurement period during a stratospheric intrusion event showed good agreement with two free flying ozonesondes. These comparisons revealed localized differences between sonde and lidar, possibly owing to the differing vertical resolutions (about 52m for lidar and at least 120m for sonde).

Fernando Chouza et al.
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Fernando Chouza et al.
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