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  Amazon boundary layer aerosol concentration sustained by vertical transport during rainfall

Wang, J., Krejci, R., Giangrandel, S., Kuang, C., Barbosa, H. M. J., Brito, J., et al. (2016). Amazon boundary layer aerosol concentration sustained by vertical transport during rainfall. Nature, 539(7629), 416-417. doi:10.1038/nature19819.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002C-249E-4 Version Permalink: https://hdl.handle.net/21.11116/0000-0000-C229-7
Genre: Journal Article

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 Creators:
Wang, Jian, Author
Krejci, Radovan, Author
Giangrandel, Scott, Author
Kuang, Chongai, Author
Barbosa, Henrique M. J., Author
Brito, Joel, Author
Carbone, Samara, Author
Chi, Xuguang, Author
Comstock, Jennifer, Author
Ditas, Florian, Author
Lavrič, J. V.1, Author           
Manninen, Hanna E., Author
Mei, Fan, Author
Moran-Zuloaga, Daniel, Author
Poehlker, Christopher, Author
Poehlker, Mira L., Author
Saturno, Jorge, Author
Schmid, Beat, Author
Souza, Rodrigo A. F., Author
Springston, Stephen R., Author
Tomlinson, Jason M., AuthorToto, Tami, AuthorWalter, David, AuthorWimmer, Daniela, AuthorSmith, James N., AuthorKulmala, Markku, AuthorMachado, Luiz A. T., AuthorArtaxo, Paulo, AuthorAndreae, Meinrat O., AuthorPetaja, Tuukka, AuthorMartin, Scot T., Author more..
Affiliations:
1Tall Tower Atmospheric Gas Measurements, Dr. J. Lavrič, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497786              

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 Abstract: The nucleation of atmospheric vapours is an important source of new aerosol particles that can subsequently grow to form cloud condensation nuclei in the atmosphere1. Most field studies of atmospheric aerosols over continents are influenced by atmospheric vapours of anthropogenic origin (for example, ref. 2) and, in consequence, aerosol processes in pristine, terrestrial environments remain poorly understood. The Amazon rainforest is one of the few continental regions where aerosol particles and their precursors can be studied under near-natural conditions3–5, but the origin of small aerosol particles that grow into cloud condensation nuclei in the Amazon boundary layer remains unclear6–8. Here we present aircraft- and ground-based measurements under clean conditions during the wet season in the central Amazon basin. We find that high concentrations of small aerosol particles (with diameters of less than 50 nanometres) in the lower free troposphere are transported from the free troposphere into the boundary layer during precipitation events by strong convective downdrafts and weaker downward motions in the trailing stratiform region. This rapid vertical transport can help to maintain the population of particles in the pristine Amazon boundary layer, and may therefore influence cloud properties and climate under natural conditions.

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 Dates: 2016-10-242016-11-17
 Publication Status: Issued
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 Identifiers: Other: BGC2564
DOI: 10.1038/nature19819
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Title: Nature
  Abbreviation : Nature
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 539 (7629) Sequence Number: - Start / End Page: 416 - 417 Identifier: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238