536 Validation and Interannual Variability of Ozone at JPL Table Mountain Facility and Mauna Loa Observatory Using the Newly Reanalyzed NDACC Lidar Data Sets

Tuesday, 8 January 2019
Hall 4 (Phoenix Convention Center - West and North Buildings)
Thierry Leblanc, JPL, Wrightwood, CA

The work to be presented reviews the results obtained from the recent re-analysis of several long-term lidar datasets using the new Global Lidar Analysis Software Suite (GLASS) developed for the centralized data processing/re-processing of a large number of lidar instruments across three major ground-based networks, including, but not limited to, NDACC (Network for the Detection of Atmospheric Composition Change) and GRUAN (GCOS Reference Upper Air Network).

Two Differential Absorption Lidar (DIAL) instruments at the Table Mountain Facility, California (TMF) and Mauna Loa Observatory, Hawaii, have been operated for several decades now. They provide stratospheric ozone profiles (12-50 km), aerosol profiles (12-40 km), temperature profiles (12-90 km), typically 3-5 times per week, totaling more than 2500 profiles since 1988 and 1993 at TMF and MLO, respectively. A third DIAL instrument provides tropospheric ozone profiles (3-25 km) at TMF since 1999.

As part of the present validation work, the GLASS ozone products are compared to the historical JPL lidar ozone products archived at NDACC, which have contributed to many past ozone long-term trend assessment reports. Comparisons with satellite datasets (e.g., Aura-MLS) are also shown. Finally this work focuses on the comparison of ozone long-term variability in the Upper Troposphere/Lower Stratosphere (UTLS) as measured simultaneously by the tropospheric and stratospheric ozone lidars at TMF.

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