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  • Zha, Qiaozhi (author)

Oxidized organic molecules in the tropical free troposphere over Amazonia

  • Article/chapterEnglish2024

Publisher, publication year, extent ...

  • 2024
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-222242
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-222242URI
  • https://doi.org/10.1093/nsr/nwad138DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • New particle formation (NPF) in the tropical free troposphere (FT) is a globally important source of cloud condensation nuclei, affecting cloud properties and climate. Oxidized organic molecules (OOMs) produced from biogenic volatile organic compounds are believed to contribute to aerosol formation in the tropical FT, but without direct chemical observations. We performed in situ molecular-level OOMs measurements at the Bolivian station Chacaltaya at 5240 m above sea level, on the western edge of Amazonia. For the first time, we demonstrate the presence of OOMs, mainly with 4-5 carbon atoms, in both gas-phase and particle-phase (in terms of mass contribution) measurements in tropical FT air from Amazonia. These observations, combined with air mass history analyses, indicate that the observed OOMs are linked to isoprene emitted from the rainforests hundreds of kilometers away. Based on particle-phase measurements, we find that these compounds can contribute to NPF, at least the growth of newly formed nanoparticles, in the tropical FT on a continental scale. Thus, our study is a fundamental and significant step in understanding the aerosol formation process in the tropical FT. In-situ molecular-level measurements demonstrate the presence of oxidized organic molecules, mainly with 4-5 carbon atoms, in both gas-phase and particle-phase in tropical free troposphere air from Amazonia. These molecules are linked to isoprene emitted from the rainforests hundreds of kilometers away, and can contribute to new particle formation.

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  • Aliaga, Diego (author)
  • Krejci, Radovan,1970-Stockholms universitet,Meteorologiska institutionen (MISU),Bolincentret för klimatforskning (tills m KTH & SMHI)(Swepub:su)krejc (author)
  • Sinclair, Victoria A. (author)
  • Wu, Cheng (author)
  • Ciarelli, Giancarlo (author)
  • Scholz, Wiebke (author)
  • Heikkinen, Liine,1990-Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI),University of Helsinki, Finland(Swepub:su)lihe4068 (author)
  • Partoll, Eva (author)
  • Gramlich, Yvette,1993-Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)(Swepub:su)yvgr0791 (author)
  • Huang, Wei (author)
  • Leiminger, Markus (author)
  • Enroth, Joonas (author)
  • Peräkylä, Otso (author)
  • Cai, Runlong (author)
  • Chen, Xuemeng (author)
  • Koenig, Alkuin Maximilian (author)
  • Velarde, Fernando (author)
  • Moreno, Isabel (author)
  • Petäjä, Tuukka (author)
  • Artaxo, Paulo (author)
  • Laj, Paolo (author)
  • Hansel, Armin (author)
  • Carbone, Samara (author)
  • Kulmala, Markku (author)
  • Andrade, Marcos (author)
  • Worsnop, Douglas (author)
  • Mohr, Claudia (author)
  • Bianchi, Federico (author)
  • Stockholms universitetMeteorologiska institutionen (MISU) (creator_code:org_t)

Related titles

  • In:National Science Review11:12095-51382053-714X

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