Depolarization and lidar ratios at 355, 532, and 1064 nm and microphysical properties of aged tropospheric and stratospheric Canadian wildfire smoke
Moritz Haarig,Albert Ansmann,Holger Baars,Cristofer Jimenez,Igor Veselovskii,Ronny Engelmann,Dietrich Althausen +6 more
TLDR
In this paper, optical and microphysical properties of western Canadian wildfire smoke observed in a tropospheric layer from 5.5-6.5 km height and in a stratospheric layers from 15-16 km height during a record-breaking smoke event were presented.Abstract:
. We present spectrally resolved optical and microphysical properties of
western Canadian wildfire smoke observed in a tropospheric layer from
5–6.5 km height and in a stratospheric layer from 15–16 km height during
a record-breaking smoke event on 22 August 2017. Three polarization/Raman
lidars were run at the European Aerosol Research Lidar Network (EARLINET)
station of Leipzig, Germany, after sunset on 22 August. For the first time,
the linear depolarization ratio and extinction-to-backscatter ratio (lidar
ratio) of aged smoke particles were measured at all three important lidar
wavelengths of 355, 532, and 1064 nm. Very different particle depolarization
ratios were found in the troposphere and in the stratosphere. The obviously
compact and spherical tropospheric smoke particles caused almost no
depolarization of backscattered laser radiation at all three wavelengths
( %), whereas the dry irregularly shaped soot particles in the
stratosphere lead to high depolarization ratios of 22 % at 355 nm and
18 % at 532 nm and a comparably low value of 4 % at 1064 nm. The lidar
ratios were 40–45 sr (355 nm), 65–80 sr (532 nm), and 80–95 sr
(1064 nm) in both the tropospheric and stratospheric smoke layers
indicating similar scattering and absorption properties. The strong
wavelength dependence of the stratospheric depolarization ratio was probably
caused by the absence of a particle coarse mode (particle mode consisting of
particles with radius >500 nm ). The stratospheric smoke particles
formed a pronounced accumulation mode (in terms of particle volume or mass)
centered at a particle radius of 350–400 nm. The effective particle radius
was 0.32 µ m. The tropospheric smoke particles were much smaller
(effective radius of 0.17 µ m). Mass concentrations were of the
order of 5.5 µ g m −3 (tropospheric layer) and
40 µ g m −3 (stratospheric layer) in the night of
22 August 2017. The single scattering albedo of the stratospheric particles
was estimated to be 0.74, 0.8, and 0.83 at 355, 532, and 1064 nm,
respectively.read more
Citations
More filters
Journal ArticleDOI
Black carbon lofts wildfire smoke high into the stratosphere to form a persistent plume.
Pengfei Yu,Pengfei Yu,Pengfei Yu,Owen B. Toon,Charles G. Bardeen,Yunqian Zhu,Karen H. Rosenlof,Robert W. Portmann,Troy Thornberry,Troy Thornberry,Ru-Shan Gao,Sean M. Davis,Eric T. Wolf,Eric T. Wolf,Joost A. de Gouw,Joost A. de Gouw,David A. Peterson,Michael D. Fromm,Alan Robock +18 more
TL;DR: The observed rapid plume rise, latitudinal spread, and photochemical reactions provide new insights into potential global climate impacts from nuclear war.
Journal ArticleDOI
Extreme levels of Canadian wildfire smoke in the stratosphere over central Europe on 21-22 August 2017
Albert Ansmann,Holger Baars,Alexandra Chudnovsky,Ina Mattis,Igor Veselovskii,Moritz Haarig,Patric Seifert,Ronny Engelmann,Ulla Wandinger +8 more
TL;DR: In this article, the European Aerosol Research Lidar Network (EARLINET) lidars in the stratosphere over central Europe on 21 and 22 August 2017 were used to identify smoke layers with a 1-2'km vertical extent 2-5'km above the local tropopause.
Journal ArticleDOI
Long-range-transported Canadian smoke plumes in the lower stratosphere over northern France
Qiaoyun Hu,Philippe Goloub,Igor Veselovskii,Juan Antonio Bravo-Aranda,Ioana Elisabeta Popovici,Thierry Podvin,Martial Haeffelin,Anton Lopatin,Oleg Dubovik,Christophe Pietras,Xin Huang,Benjamin Torres,Cheng Chen +12 more
TL;DR: In this article, a long-range-transported Canadian smoke layers in the stratosphere over northern France were detected by three lidar systems in August 2017, and the retrieved single-scattering albedo is in the range of 0.8 to 0.9, indicating that the smoke plumes are absorbing.
Journal ArticleDOI
The unprecedented 2017–2018 stratospheric smoke event: decay phase and aerosol properties observed with the EARLINET
Holger Baars,Albert Ansmann,Kevin Ohneiser,Moritz Haarig,Ronny Engelmann,Dietrich Althausen,Ingrid Hanssen,Michael Gausa,Aleksander Pietruczuk,Artur Szkop,Iwona S. Stachlewska,Dongxiang Wang,Jens Reichardt,Annett Skupin,Ina Mattis,Thomas Trickl,Hannes Vogelmann,Francisco Navas-Guzmán,Alexander Haefele,Karen Acheson,Albert A. Ruth,Boyan Tatarov,Detlef Müller,Qiaoyun Hu,Thierry Podvin,Philippe Goloub,Igor Veselovskii,Christophe Pietras,Martial Haeffelin,Patrick Fréville,Michaël Sicard,Adolfo Comerón,Alfonso Javier Fernández García,Francisco Molero Menéndez,Carmen Córdoba-Jabonero,Juan Luis Guerrero-Rascado,Lucas Alados-Arboledas,Daniele Bortoli,Maria João Costa,Davide Dionisi,G. L. Liberti,Xuan Wang,Alessia Sannino,Nikolaos Papagiannopoulos,Antonella Boselli,Lucia Mona,Giuseppe D'Amico,Salvatore Romano,Maria Rita Perrone,Livio Belegante,Doina Nicolae,Ivan Grigorov,Anna Gialitaki,Vassilis Amiridis,Ourania Soupiona,Alexandros Papayannis,Rodanthi Mamouri,Argyro Nisantzi,Birgit Heese,Julian Hofer,Yoav Y. Schechner,Ulla Wandinger,Gelsomina Pappalardo +62 more
TL;DR: In this article, the decay phase of an unprecedented, record-breaking stratospheric perturbation caused by wildfire smoke is reported and discussed in terms of geometrical, optical, and microphysical aerosol properties.
Journal ArticleDOI
Scattering and Radiative Properties of Morphologically Complex Carbonaceous Aerosols: A Systematic Modeling Study
Li Liu,Michael I. Mishchenko +1 more
TL;DR: It is concluded that for an accurate estimate of black-carbon radiative forcing, one must take into account the complex morphologies of carbonaceous aerosols in remote sensing studies as well as in atmospheric radiation computations.
References
More filters
Journal ArticleDOI
AERONET-a federated instrument network and data archive for aerosol Characterization
Brent N. Holben,Thomas F. Eck,Ilya Slutsker,Didier Tanré,J. P. Buis,Alberto Setzer,Eric Vermote,John A. Reagan,Yoram J. Kaufman,Teruyuki Nakajima,François Lavenu,I. Jankowiak,Alexander Smirnov +12 more
TL;DR: The operation and philosophy of the monitoring system, the precision and accuracy of the measuring radiometers, a brief description of the processing system, and access to the database are discussed.
Journal ArticleDOI
Overview of the CALIPSO Mission and CALIOP Data Processing Algorithms
David M. Winker,Mark A. Vaughan,Ali Omar,Yongxiang Hu,Kathleen A. Powell,Zhaoyan Liu,William H. Hunt,Stuart A. Young +7 more
TL;DR: Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) is a two-wavelength polarization lidar that performs global profiling of aerosols and clouds in the troposphere and lower stratosphere as discussed by the authors.
Journal ArticleDOI
THE CALIPSO MISSION: A Global 3D View of Aerosols and Clouds
David M. Winker,Jacques Pelon,James A. Coakley,Steven A. Ackerman,Robert J. Charlson,Peter R. Colarco,Pierre H. Flamant,Qiang Fu,Raymond M. Hoff,Chieko Kittaka,T. L. Kubar,H. Le Treut,M. P. McCormick,Gérard Mégie,Lamont R. Poole,Kathleen A. Powell,Chip Trepte,Mark A. Vaughan,Bruce A. Wielicki +18 more
TL;DR: CALIPSO as mentioned in this paper is a two-wavelength, polarization-sensitive lidar, along with two passive sensors operating in the visible and thermal infrared spectral regions for long-term atmospheric measurements from Earth's orbit.
Journal ArticleDOI
The CALIPSO Automated Aerosol Classification and Lidar Ratio Selection Algorithm
Ali Omar,David M. Winker,Mark A. Vaughan,Yongxiang Hu,Charles R. Trepte,Richard Ferrare,Kam-Pui Lee,Chris A. Hostetler,Chieko Kittaka,Raymond R. Rogers,Ralph Kuehn,Zhaoyan Liu +11 more
TL;DR: In this paper, the extinction-to-backscatter ratio (lidar ratio) selection scheme for the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) aerosol products is described.
Journal ArticleDOI
Variability in morphology, hygroscopicity, and optical properties of soot aerosols during atmospheric processing
TL;DR: Experimental studies are presented to show that soot particles acquire a large mass fraction of sulfuric acid during atmospheric aging, considerably altering their properties, representing an important mechanism of atmospheric aging.