TMF Tropospheric Ozone Lidar (TMTOL) tracks elevated ozone in the San Gabriel Mountains

April 23, 2021

A recent study using 140 consecutive hours of lidar rmeasurements at TMF in June 2020 showed extended periods of ozone in excess of 90 ppbv in the bounday layer and just above it, thus allowing a clear attribution of its origin.


Details in Chouza, F., et al. (2021), The impact of Los Angeles Basin pollution and stratospheric intrusions on the surrounding San Gabriel Mountains as seen by surface measurements, lidar, and numerical models, Atmos. Chem. Phys., 21(8), 6129-6153.

JPL Lidar at Mauna Loa (MLSOL) records highest stratospheric aerosol levels since Mt. Pinatubo era

June 10, 2020

Using muti-decadal aerosol time series measured by the JPL stratospheric ozone lidar located at Mauna Loa Observatory (Hawaii), as well as satellite measurements, this study shows that stratospheric aerosols in the Northern Hemisphere have reached their highest level in 2019 since the post-Pinatubo eruption era (in the early/mid-1990s). This high aerorol content was the result of two large volcanic eruptions, and an intense wildfire season during boreal summer, injecting large quantities of smoke in the stratosphere.


Details in Leblanc, T., F. Chouza, G. Taha, S. Khaykin, J. Barnes, J.-P. Vernier, and L. Rieger, 2019: A 25-year high in global stratospheric aerosol loading [in “State of the Climate in 2019"]. Bull. Amer. Meteor., 101 (8), S88–S89,

Also in Chouza, F., T. Leblanc, J. Barnes, M. Brewer, P. Wang, and D. Koon (2020), Long-term (1999–2019) variability of stratospheric aerosol over Mauna Loa, Hawaii, as seen by two co-located lidars and satellite measurements, Atmos. Chem. Phys., 20(11), 6821-6839.

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