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Brown carbon aerosols from burning of boreal peatlands: microphysical properties, emission factors, and implications for direct radiative forcing
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Abstract
The surface air warming over the Arctic has been almost twice as much as the global average in recent decades. In this region, unprecedented amounts of smoldering peat fires have been identified as a major emission source of climate-warming agents. While much is known about greenhouse gas emissions from these fires, there is a knowledge gap on the nature of particulate emissions and their potential role in atmospheric warming. Here, we show that aerosols emitted from burning of Alaskan and Siberian peatlands are predominantly brown carbon (BrC) – a class of visible light-absorbing organic carbon (OC) – with a negligible amount of black carbon content. The mean fuel-based emission factors for OC aerosols ranged from 3.8 to 16.6 g kg −1 . Their mass absorption efficiencies were in the range of 0.2–0.8 m 2 g −1 at 405 nm (violet) and dropped sharply to 0.03–0.07 m 2 g −1 at 532 nm (green), characterized by a mean Ångström exponent of ≈ 9. Electron microscopy images of the particles revealed their morphologies to be either single sphere or agglomerated “tar balls”. The shortwave top-of-atmosphere aerosol radiative forcing per unit optical depth under clear-sky conditions was estimated as a function of surface albedo. Only over bright surfaces with albedo greater than 0.6, such as snow cover and low-level clouds, the emitted aerosols could result in a net warming (positive forcing) of the atmosphere.
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“and aerosols emitted during fire combustion could have large impacts on regional and global climate as well (Chakrabarty et al., 2016).”
From Fire as a fundamental ecological process: Research advances and frontiers (2020) · cites this paper as Chakrabarty et al., 2016
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“Third, it has also been found that the BC content in peatland burning emissions in Alaska tends to be lower than that of peatland burning emission in the tropics (Chakrabarty et al., 2016), possibly caused by temperature and humidity differences (Turetsky et al., 2014).”
From Local Arctic Air Pollution: A Neglected but Serious Problem (2018) · cites this paper as Chakrabarty et al., 2016
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Bond, T. C., & Bergstrom, R. W. (2006) · Aerosol Science and Technology · doi:10.1080/02786820500421521 · Cited by 2,980
The amount of carbon released from peat and forest fires in Indonesia during 1997
Page, S. E., Siegert, F., Rieley, J. O., Boehm, H.-D. V., Jaya, A., & Limin, S. (2002) · Nature · doi:10.1038/nature01131 · Cited by 1,885
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Cited by
Sorted by citations
Fire as a fundamental ecological process: Research advances and frontiers
McLauchlan, K. K., Higuera, P. E., Miesel, J., Rogers, B. M., Schweitzer, J., Shuman, J. K., Tepley, A. J., Varner, J. M., Veblen, T. T., Adalsteinsson, S. A., et al. (2020) · Journal of Ecology · doi:10.1111/1365-2745.13403 · Cited by 729
“Interactions between above-ground vegetation and climate at local to global scales are key to understanding the ecosystem consequences of changing fire activity (Archibald et al., 2018). have large impacts on regional and global climate as well (Chakrabarty et al., 2016).”
Self-citationLocal Arctic Air Pollution: A Neglected but Serious Problem
Schmale, J., Arnold, S. R., Law, K. S., Thorp, T., Anenberg, S., Simpson, W. R., Mao, J., & Pratt, K. A. (2018) · Earth's Future · doi:10.1029/2018ef000952 · Cited by 221
“Third, it has also been found that the BC content in peatland burning emissions in Alaska tends to be lower than that of peatland burning emission in the tropics (Chakrabarty et al., 2016), possibly caused by temperature and humidity differences (Turetsky et al., 2014).”
BackgroundKinase, T., Taketani, F., Takigawa, M., Zhu, C., Kim, Y., Mordovskoi, P., & Kanaya, Y. (2025) · Atmospheric Chemistry and Physics · doi:10.5194/acp-25-143-2025 · Cited by 4
Metadata
- Authors
- Chakrabarty, R. K., Gyawali, M., Yatavelli, R. L. N., Pandey, A., Watts, A. C., Knue, J., Chen, L.-W. A., Pattison, R. R., Tsibart, A., Samburova, V., & Moosmüller, H.
- Affiliations
- Washington University in St. Louis (US)
- Desert Research Institute (US)
- California Air Resources Board (US)
- University of Nevada, Las Vegas (US)
- US Forest Service (US)
- Lomonosov Moscow State University (RU)
- Corresponding author
- Chakrabarty, Rajan K.
- Gyawali, Madhu
- Yatavelli, Reddy L. N.
- Pandey, Apoorva
- Watts, Adam C.
- Knue, Joseph
- Chen, Lung-Wen A.
- Pattison, Robert R.
- Tsibart, Anna
- Samburova, Vera
- Moosmüller, Hans
- ORCID
- Venue
- Atmospheric Chemistry and Physics
- Publisher
- Copernicus GmbH
- Published
- 2016-03-09
- Volume
- 16
- Issue
- 5
- Pages
- 3033-3040
- ISSN
- 1680-7316 (ISSN-L)
- 1680-7324
- OpenAlex
- W2294297354
- Cited by
- 145
- References
- 2
- Citations by year
- 2026: 7 · 2025: 11 · 2024: 16 · 2023: 7 · 2022: 13 · 2021: 11 · 2020: 21 · 2019: 17 · 2018: 20 · 2017: 14 · 2016: 7
- FWCI
- 11.80
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Atmospheric chemistry and physics (publishedVersion, cc-by)
- Digital Scholarship - UNLV (University of Nevada Reno) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Aeronautics and Space Administration (NNX15AI66G, NNX15AI48G)
- Directorate for Geosciences (AGS1455215, DEB1342094, DEB1354482)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
- Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
- Keywords
- brown carbon, peatland fires, organic carbon aerosols, mass absorption efficiency, emission factors, tar balls, aerosol microphysical properties, direct radiative forcing, Arctic warming, black carbon, surface albedo, Siberia, Alaska
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- CoChat. (2026). Citation check: Brown carbon aerosols from burning of boreal peatlands: microphysical properties, emission factors, and implications for direct radiative forcing. https://app.cochat.ai/papers/10.5194/acp-16-3033-2016
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- Chakrabarty, R. K., Gyawali, M., Yatavelli, R. L. N., Pandey, A., Watts, A. C., Knue, J., Chen, L.-W. A., Pattison, R. R., Tsibart, A., Samburova, V., & Moosmüller, H. (2016). Brown carbon aerosols from burning of boreal peatlands: microphysical properties, emission factors, and implications for direct radiative forcing. Atmospheric Chemistry and Physics. https://doi.org/10.5194/acp-16-3033-2016