Upgrade and automation of the JPL Table Mountain Facility tropospheric ozone lidar (TMTOL) for near-ground ozone profiling and satellite validation
<p>As part of international efforts to monitor air quality, several satellite missions such as the Tropospheric Monitoring Instrument (TROPOMI) were deployed and others, like Tropospheric Emissions: Monitoring Pollution (TEMPO), are planned for the near future. In support of the validation of...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-01-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/569/2019/amt-12-569-2019.pdf |
| Summary: | <p>As part of international efforts to monitor air quality,
several satellite missions such as the Tropospheric Monitoring Instrument
(TROPOMI) were deployed and others, like Tropospheric Emissions: Monitoring
Pollution (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 100 m above surface.</p>
<p>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 co-located tethered balloon.
An agreement of about 5 % with the ozonesonde down to an altitude range of
100 m a.g.l. was observed. 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 2-month test period and an agreement better than
10 %. Finally, measurements from a 24 h 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
(between 52 and 380 m for lidar and about 100 m for the sonde).</p> |
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| ISSN: | 1867-1381 1867-8548 |