| Full text | |
| Author(s): Show less - |
Curtius, Joachim
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Heinritzi, Martin
;
Beck, Lisa J.
;
Poehlker, Mira L.
;
Tripathi, Nidhi
;
Krumm, Bianca E.
;
Holzbeck, Philip
;
Nussbaumer, Clara M.
;
Pardo, Lianet Hernandez
;
Klimach, Thomas
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Barmpounis, Konstantinos
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Andersen, Simone T.
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Bardakov, Roman
;
Bohn, Birger
;
Cecchini, Micael A.
;
Chaboureau, Jean-Pierre
;
Dauhut, Thibaut
;
Dienhart, Dirk
;
Doerich, Raphael
;
Edtbauer, Achim
;
Giez, Andreas
;
Hartmann, Antonia
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Holanda, Bruna A.
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Joppe, Philipp
;
Kaiser, Katharina
;
Keber, Timo
;
Klebach, Hannah
;
Krueger, Ovid O.
;
Kuerten, Andreas
;
Mallaun, Christian
;
Marno, Daniel
;
Martinez, Monica
;
Monteiro, Carolina
;
Nelson, Carolina
;
Ort, Linda
;
Raj, Subha S.
;
Richter, Sarah
;
Ringsdorf, Akima
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Rocha, Fabio
;
Simon, Mario
;
Sreekumar, Sreedev
;
Tsokankunku, Anywhere
;
Unfer, Gabriela R.
;
Valenti, Isabella D.
;
Wang, Nijing
;
Zahn, Andreas
;
Zauner-Wieczorek, Marcel
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Albrecht, Rachel I.
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Andreae, Meinrat O.
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Artaxo, Paulo
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Crowley, John N.
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Fischer, Horst
;
Harder, Hartwig
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Herdies, Dirceu L.
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Machado, Luiz A. T.
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Poehlker, Christopher
;
Poeschl, Ulrich
;
Possner, Anna
;
Pozzer, Andrea
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Schneider, Johannes
;
Williams, Jonathan
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Lelieveld, Jos
Total Authors: 62
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| Document type: | Journal article |
| Source: | Nature; v. 636, n. 8041, p. 23-pg., 2024-12-05. |
| Abstract | |
New particle formation (NPF) in the tropical upper troposphere is a globally important source of atmospheric aerosols1, 2, 3-4. It is known to occur over the Amazon basin, but the nucleation mechanism and chemical precursors have yet to be identified2. Here we present comprehensive in situ aircraft measurements showing that extremely low-volatile oxidation products of isoprene, particularly certain organonitrates, drive NPF in the Amazonian upper troposphere. The organonitrates originate from OH-initiated oxidation of isoprene from forest emissions in the presence of nitrogen oxides from lightning. Nucleation bursts start about 2 h after sunrise in the outflow of nocturnal deep convection, producing high aerosol concentrations of more than 50,000 particles cm-3. We report measurements of characteristic diurnal cycles of precursor gases and particles. Our observations show that the interplay between biogenic isoprene, deep tropical convection with associated lightning, oxidation photochemistry and the low ambient temperature uniquely promotes NPF. The particles grow over time, undergo long-range transport and descend through subsidence to the lower troposphere, in which they can serve as cloud condensation nuclei (CCN) that influence the Earth's hydrological cycle, radiation budget and climate1,4, 5, 6, 7-8. (AU) | |
| FAPESP's process: | 22/01780-9 - Detecting new particle formation at ATTO: evaluation of convective cloud effect |
| Grantee: | Gabriela Rosalino Unfer |
| Support Opportunities: | Scholarships abroad - Research Internship - Master's degree |
| FAPESP's process: | 21/03547-7 - Weather events and aerosol interactions in Amazonia |
| Grantee: | Gabriela Rosalino Unfer |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 22/13257-9 - Connecting the level of cloud organization to the hydrologic and aerosol cycles in the Amazon (CLOUDORG) |
| Grantee: | Micael Amore Cecchini |
| Support Opportunities: | Research Program on Global Climate Change - Young Investigators |