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Journal Articles Bulletin of the American Meteorological Society Year : 2022

The SALTENA Experiment: Comprehensive Observations of Aerosol Sources, Formation, and Processes in the South American Andes

Federico Bianchi
  • Function : Author
Victoria A. Sinclair
  • Function : Author
Diego Aliaga
  • Function : Author
Qiaozhi Zha
  • Function : Author
Wiebke Scholz
  • Function : Author
Cheng Wu
  • Function : Author
Liine Heikkinen
  • Function : Author
Rob Modini
  • Function : Author
Eva Partoll
  • Function : Author
Fernando Velarde
  • Function : Author
Isabel Moreno
  • Function : Author
Yvette Gramlich
  • Function : Author
Wei Huang
  • Function : Author
Alkuin Maximilian Koenig
Markus Leiminger
  • Function : Author
Joonas Enroth
  • Function : Author
Otso Peräkylä
  • Function : Author
Angela Marinoni
  • Function : Author
Chen Xuemeng
  • Function : Author
Luis Blacutt
  • Function : Author
Ricardo Forno
  • Function : Author
Rene Gutierrez
  • Function : Author
Gaëlle Uzu
Maria Cristina Facchini
  • Function : Author
Stefania Gilardoni
  • Function : Author
Martin Gysel-Beer
  • Function : Author
Runlong Cai
  • Function : Author
Tuukka Petäjä
  • Function : Author
Matteo Rinaldi
  • Function : Author
Harald Saathoff
  • Function : Author
Douglas Worsnop
  • Function : Author
Paulo Artaxo
  • Function : Author
Armin Hansel
  • Function : Author
Markku Kulmala
  • Function : Author
Alfred Wiedensohler
  • Function : Author
Radovan Krejci
  • Function : Author
Samara Carbone
  • Function : Author
Marcos Andrade
  • Function : Author
Claudia Mohr
  • Function : Author

Abstract

This paper presents an introduction to the Southern Hemisphere High Altitude Experiment on Particle Nucleation and Growth (SALTENA). This field campaign took place between December 2017 and June 2018 (wet to dry season) at Chacaltaya (CHC), a GAW (Global Atmosphere Watch) station located at 5,240 m MSL in the Bolivian Andes. Concurrent measurements were conducted at two additional sites in El Alto (4,000 m MSL) and La Paz (3,600 m MSL). The overall goal of the campaign was to identify the sources, understand the formation mechanisms and transport, and characterize the properties of aerosol at these stations. State-of-the-art instruments were brought to the station complementing the ongoing permanent GAW measurements, to allow a comprehensive description of the chemical species of anthropogenic and biogenic origin impacting the station and contributing to new particle formation. In this overview we first provide an assessment of the complex meteorology, airmass origin, and boundary layer-free troposphere interactions during the campaign using a 6-month high-resolution Weather Research and Forecasting (WRF) simulation coupled with Flexible Particle dispersion model (FLEXPART). We then show some of the research highlights from the campaign, including (i) chemical transformation processes of anthropogenic pollution while the air masses are transported to the CHC station from the metropolitan area of La Paz-El Alto, (ii) volcanic emissions as an important source of atmospheric sulfur compounds in the region, (iii) the characterization of the compounds involved in new particle formation, and (iv) the identification of long-range-transported compounds from the Pacific or the Amazon basin. We conclude the article with a presentation of future research foci. The SALTENA dataset highlights the importance of comprehensive observations in strategic high-altitude locations, especially the undersampled Southern Hemisphere.
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insu-03706397 , version 1 (11-08-2022)

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Federico Bianchi, Victoria A. Sinclair, Diego Aliaga, Qiaozhi Zha, Wiebke Scholz, et al.. The SALTENA Experiment: Comprehensive Observations of Aerosol Sources, Formation, and Processes in the South American Andes. Bulletin of the American Meteorological Society, 2022, 103, pp.E212-E229. ⟨10.1175/BAMS-D-20-0187.1⟩. ⟨insu-03706397⟩
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