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Formation Process of Particles and Cloud Condensation Nuclei Over the Amazon Rainforest: The Role of Local and Remote New-Particle Formation

Geophysical research letters, 2022-11, Vol.49 (22) [Peer Reviewed Journal]

ISSN: 0094-8276 ;EISSN: 1944-8007

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  • Title:
    Formation Process of Particles and Cloud Condensation Nuclei Over the Amazon Rainforest: The Role of Local and Remote New-Particle Formation
  • Author: Zhao, Bin ; Fast, Jerome D. ; Shrivastava, Manish ; Donahue, Neil M. ; Gao, Yang ; Shilling, John E. ; Liu, Ying ; Zaveri, Rahul A. ; Gaudet, Brian ; Wang, Shuxiao ; Wang, Jian ; Li, Zeqi ; Fan, Jiwen
  • Subjects: ENVIRONMENTAL SCIENCES
  • Is Part Of: Geophysical research letters, 2022-11, Vol.49 (22)
  • Description: Abstract Understanding the formation processes of particles and cloud condensation nuclei (CCN) in pristine environments is a major challenge in assessing the anthropogenic impacts on climate change. Using a state‐of‐the‐art model that systematically simulates the new‐particle formation (NPF) from condensable vapors and multi‐scale transport of chemical species, we find that NPF contributes ∼90% of the particle number and ∼80% of the CCN at 0.5% supersaturation (CCN0.5%) in the pristine Amazon boundary layer during the wet season. The corresponding contributions are only ∼30% and ∼20% during the dry season because of prevalent biomass burning. In both seasons, ∼50% of the NPF‐induced particles and ∼85% of the NPF‐induced CCN0.5% in the boundary layer originate from the long‐range transport of new particles formed hundreds to thousands of kilometers away. Moreover, about 50%–65% of the NPF‐induced particles and 35%–50% of the NPF‐induced CCN0.5% originate from the downward transport of new particles formed aloft.
  • Publisher: United States: American Geophysical Union (AGU)
  • Language: English
  • Identifier: ISSN: 0094-8276
    EISSN: 1944-8007
  • Source: Wiley Blackwell AGU Digital Archive
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