Optical properties of stratospheric aerosols from wildfires and volcanic eruptions constrained by satellite and ground-based lidars – Part I: large scale evolution
Abstract
Stratospheric aerosols exert a major influence on the Earth's radiative balance, atmospheric chemistry, and climate variability. Over the last two decades, the stratospheric aerosol layer has been repeatedly perturbed by explosive volcanic eruptions and, more recently, by extreme wildfire events capable of injecting large amounts of aerosols into the lower stratosphere. Characterizing the long-term evolution of these perturbations is therefore essential for improving our understanding of stratospheric aerosol variability and its climatic impacts. This study is presented in two companion papers.
Part I focuses on the large-scale evolution and persistence of major stratospheric aerosol perturbations over the CALIPSO observational period, while Part II investigates the optical properties and early evolution of individual volcanic and wildfire plumes.
In this study, we investigate the large-scale evolution of the stratospheric aerosol layer between 2006 and 2023 using a new dataset Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) Level 1 dataset (L1CC). The analysis combines stratospheric aerosol optical depth (SAOD), scattering ratio (SR), and bulk depolarization with the Global Space-based Stratospheric Aerosol Climatology (GloSSAC), Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP) observations, Atmospheric Lidar (ATLID) observations aboard EarthCARE, and independent Network for the Detection of Atmospheric Composition Change (NDACC) lidar measurements at the Observatoire de Haute-Provence (44°N) and Lauder (45°S). The corrected dataset is validated against these independent observations, demonstrating its capability to reproduce the timing, magnitude and vertical evolution of the major stratospheric aerosol perturbations observed during the CALIPSO mission.
Related
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BibTeX
@misc{soares2026optical,
title = {{Optical properties of stratospheric aerosols from wildfires and volcanic eruptions constrained by satellite and ground-based lidars – Part I: large scale evolution}},
author = {Océane Soares and Sergey Khaykin and Sophie Godin-Beekmann and Artem Feofilov and Tetsu Sakai and Yoshita Jin and Isamu Morino and Ben Liley and Richard Querel},
howpublished = {HAL},
year = {2026},
month = oct,
doi = {10.5194/egusphere-2026-5639},
url = {https://hal.science/hal-05844124v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Optical properties of stratospheric aerosols from wildfires and volcanic eruptions constrained by satellite and ground-based lidars – Part I: large scale evolution
AU - Océane Soares
AU - Sergey Khaykin
AU - Sophie Godin-Beekmann
AU - Artem Feofilov
AU - Tetsu Sakai
AU - Yoshita Jin
AU - Isamu Morino
AU - Ben Liley
AU - Richard Querel
PY - 2026
DA - 2026/10/15
PB - HAL
DO - 10.5194/egusphere-2026-5639
UR - https://hal.science/hal-05844124v1
AB - Stratospheric aerosols exert a major influence on the Earth's radiative balance, atmospheric chemistry, and climate variability. Over the last two decades, the stratospheric aerosol layer has been repeatedly perturbed by explosive volcanic eruptions and, more recently, by extreme wildfire events capable of injecting large amounts of aerosols into the lower stratosphere. Characterizing the long-term evolution of these perturbations is therefore essential for improving our understanding of stratospheric aerosol variability and its climatic impacts. This study is presented in two companion papers. Part I focuses on the large-scale evolution and persistence of major stratospheric aerosol perturbations over the CALIPSO observational period, while Part II investigates the optical properties and early evolution of individual volcanic and wildfire plumes. In this study, we investigate the large-scale evolution of the stratospheric aerosol layer between 2006 and 2023 using a new dataset Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) Level 1 dataset (L1CC). The analysis combines stratospheric aerosol optical depth (SAOD), scattering ratio (SR), and bulk depolarization with the Global Space-based Stratospheric Aerosol Climatology (GloSSAC), Ozone Mapping and Profiler Suite Limb Profiler (OMPS-LP) observations, Atmospheric Lidar (ATLID) observations aboard EarthCARE, and independent Network for the Detection of Atmospheric Composition Change (NDACC) lidar measurements at the Observatoire de Haute-Provence (44°N) and Lauder (45°S). The corrected dataset is validated against these independent observations, demonstrating its capability to reproduce the timing, magnitude and vertical evolution of the major stratospheric aerosol perturbations observed during the CALIPSO mission.
ER -