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Science advances
Dec, 2023;9 (48): eadi3568.

Threefold reduction of modeled uncertainty in direct radiative effects over biomass burning regions by constraining absorbing aerosols.

Qirui Zhong, Nick Schutgens, Guido R van der Werf, Toshihiko Takemura, Twan van Noije, Tero Mielonen, Ramiro Checa-Garcia, Ulrike Lohmann, Alf Kirkevåg, Dirk J L Olivié, Harri Kokkola, Hitoshi Matsui, Zak Kipling, Paul Ginoux, Philippe Le Sager, Samuel Rémy, Huisheng Bian, Mian Chin, Kai Zhang, Susanne E Bauer, Kostas Tsigaridis
Author Information
  1. Qirui Zhong: Department of Earth Sciences, Vrije Universiteit, Amsterdam, Netherlands. ORCID
  2. Nick Schutgens: Department of Earth Sciences, Vrije Universiteit, Amsterdam, Netherlands. ORCID
  3. Guido R van der Werf: Department of Earth Sciences, Vrije Universiteit, Amsterdam, Netherlands. ORCID
  4. Toshihiko Takemura: Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan. ORCID
  5. Twan van Noije: Royal Netherlands Meteorological Institute, De Bilt, Netherlands. ORCID
  6. Tero Mielonen: Finnish Meteorological Institute, Kuopio, Finland. ORCID
  7. Ramiro Checa-Garcia: Laboratoire des Sciences du Climat et de l'Environnement, IPSL, Gif-sur-Yvette, France. ORCID
  8. Ulrike Lohmann: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland. ORCID
  9. Alf Kirkevåg: Norwegian Meteorological Institute, Oslo, Norway.
  10. Dirk J L Olivié: Norwegian Meteorological Institute, Oslo, Norway.
  11. Harri Kokkola: Finnish Meteorological Institute, Kuopio, Finland. ORCID
  12. Hitoshi Matsui: Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan. ORCID
  13. Zak Kipling: European Centre for Medium-Range Weather Forecasts, Reading, UK. ORCID
  14. Paul Ginoux: NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA. ORCID
  15. Philippe Le Sager: Royal Netherlands Meteorological Institute, De Bilt, Netherlands. ORCID
  16. Samuel Rémy: HYGEOS, Lille, France. ORCID
  17. Huisheng Bian: Goddard Earth Sciences Technology and Research (GESTAR) II, University of Maryland at Baltimore County, Baltimore, MD, USA. ORCID
  18. Mian Chin: NASA Goddard Space Flight Center, Greenbelt, MD, USA. ORCID
  19. Kai Zhang: Pacific Northwest National Laboratory, Richland, WA, USA. ORCID
  20. Susanne E Bauer: NASA Goddard Institute for Space Studies, New York City, NY, USA.
  21. Kostas Tsigaridis: NASA Goddard Institute for Space Studies, New York City, NY, USA. ORCID
PMID: 38039365 DOI: 10.1126/sciadv.adi3568

Abstract

Absorbing aerosols emitted from biomass burning (BB) greatly affect the radiation balance, cloudiness, and circulation over tropical regions. Assessments of these impacts rely heavily on the modeled aerosol absorption from poorly constrained global models and thus exhibit large uncertainties. By combining the AeroCom model ensemble with satellite and in situ observations, we provide constraints on the aerosol absorption optical depth (AAOD) over the Amazon and Africa. Our approach enables identification of error contributions from emission, lifetime, and MAC (mass absorption coefficient) per model, with MAC and emission dominating the AAOD errors over Amazon and Africa, respectively. In addition to primary emissions, our analysis suggests substantial formation of secondary organic aerosols over the Amazon but not over Africa. Furthermore, we find that differences in direct aerosol radiative effects between models decrease by threefold over the BB source and outflow regions after correcting the identified errors. This highlights the potential to greatly reduce the uncertainty in the most uncertain radiative forcing agent.

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Journal Article
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