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Atmosphere
Special Issues
Biomass Burning Aerosols
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Biomass Burning Aerosols

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Aerosols".

Deadline for manuscript submissions: closed (21 April 2022) | Viewed by 2913

Special Issue Editor

Dr. Zheng Lu

E-Mail Website
Guest Editor
Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843, USA
Interests: atmospheric aerosol modeling; aerosol–cloud interaction modeling; biomass burning aerosol

Special Issue Information

Dear Colleagues,

Biomass-burning aerosols emitted from wildfires greatly impact the global climate by scattering and absorbing solar radiation and functioning as cloud condensation nuclei and ice nuclei. Recently, the occurrence frequencies and intensities of wildfires significantly increase because of global warming. Some pyro-convection systems even lifted the biomass-burning aerosols to the upper troposphere and lower stratosphere, exerting long-lived radiative effects. Despite the importance, large biases exist in the representation of biomass-burning aerosols’ emissions, injection heights, and microphysical and radiative properties in the numerical models. These biases eventually translate to large uncertainties in the estimation of biomass-burning aerosols’ radiative effects.

This Special Issue focuses on the measurement of the microphysical and radiative properties of biomass-burning aerosols, as well as modeling of the emission, transport, and climatic effects of biomass burning cross different spatiotemporal resolutions. Using novel approaches, such as machine learning/deep learning techniques, for predicting future biomass burning emissions and injection height is strongly encouraged. Long-term remote sensing analyses on the characteristics of biomass-burning aerosols and wildfires, such as absorbing AOD, burned area, and fire radiative power, are also welcomed. 

Dr. Zheng Lu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atmosphere is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biomass burning aerosols
  • wildfires
  • aerosol-radiation interaction
  • aerosol-cloud interaction
  • numerical models

Published Papers (1 paper)

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Research

21 pages, 2829 KiB  
Article
Optical Characterization of Fresh and Photochemically Aged Aerosols Emitted from Laboratory Siberian Peat Burning
by Michealene Iaukea-Lum, Chiranjivi Bhattarai, Deep Sengupta, Vera Samburova, Andrey Y. Khlystov, Adam C. Watts, William P. Arnott and Hans Moosmüller
Atmosphere 2022, 13(3), 386; https://doi.org/10.3390/atmos13030386 - 25 Feb 2022
Cited by 3 | Viewed by 2575
Abstract
Carbonaceous aerosols emitted from biomass burning influence radiative forcing and climate change. Of particular interest are emissions from high-latitude peat burning because amplified climate change makes the large carbon mass stored in these peatlands more susceptible to wildfires and their emission can affect [...] Read more.
Carbonaceous aerosols emitted from biomass burning influence radiative forcing and climate change. Of particular interest are emissions from high-latitude peat burning because amplified climate change makes the large carbon mass stored in these peatlands more susceptible to wildfires and their emission can affect cryosphere albedo and air quality after undergoing transport. We combusted Siberian peat in a laboratory biomass-burning facility and characterized the optical properties of freshly emitted combustion aerosols and those photochemically aged in an oxidation flow reactor (OFR) with a three-wavelength photoacoustic instrument. Total particle count increased with aging by a factor of 6 to 11 while the total particle volume either changed little (<8%) for 19 and 44 days of equivalent aging and increased by 88% for 61 days of equivalent aging. The aerosol single-scattering albedo (SSA) of both fresh and aged aerosol increased with the increasing wavelength. The largest changes in SSA due to OFR aging were observed at the shortest of the three wavelengths (i.e., at 405 nm) where SSA increased by less than ~2.4% for 19 and 44 days of aging. These changes were due to a decrease in the absorption coefficients by ~45%, with the effect on SSA somewhat reduced by a concurrent decrease in the scattering coefficients by 20 to 25%. For 61 days of aging, we observed very little change in SSA, namely an increase of 0.31% that was caused a ~56% increase in the absorption coefficients that was more than balanced by a somewhat larger (~71%) increase in the scattering coefficients. These large increases in the absorption and scattering coefficients for aging at 7 V are at least qualitatively consistent with the large increase in the particle volume (~88%). Overall, aging shifted the absorption toward longer wavelengths and decreased the absorption Ångström exponents, which ranged from ~5 to 9. Complex refractive index retrieval yielded real and imaginary parts that increased and decreased, respectively, with the increasing wavelength. The 405 nm real parts first increased and then decreased and imaginary parts decreased during aging, with little change at other wavelengths. Full article
(This article belongs to the Special Issue Biomass Burning Aerosols)
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