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Atmospheric chemistry impacts global climate, regional air pollution, and human health. Air-surface interactions are important components of global atmospheric and biogeochemical cycles. Chemical reactions occur in the environment between trace gases, within aqueous solutions (e.g. cloud droplets), within particles, and on surfaces (e.g. snow, ice, atmospheric particles, vegetation). Atmospheric particles, often ~3 nm to 10 microns in diameter, are constantly evolving, complex mixtures that interact with radiation, form cloud droplet and ice crystals, and deposit onto surfaces. Primary atmospheric particles are emitted from a variety of natural and anthropogenic sources (e.g., dust, bacteria, sea spray, soot) and undergo heterogeneous and particle-phase reactions during transport. Secondary organic aerosol, formed primarily from the oxidation of trace level volatile organic compounds and subsequent gas-particle partitioning, is a dynamic chemical mixture, wherein each particle can contain thousands of organic compounds, the vast majority of which remain unidentified. Given the complexity and evolving nature of atmospheric particles, their measurement represents an analytical challenge and has resulted in significant uncertainties in our understanding of particle formation, evolution, and environmental impacts and fate.
The Pratt group focuses on studies of interactions between atmospheric trace gases, particles, and clouds using novel mass spectrometry techniques. In particular, we tackle the major uncertainties that exist in our understanding of atmospheric composition in wintertime environments and the Polar Regions, especially in the Arctic, which is experiencing rapid sea ice loss and increasing shipping and development. We use a custom-built, field-portable single-particle mass spectrometer to measure the size and chemistry of individual particles in real-time. Trace gas composition is measured using a field-portable on-line chemical ionization mass spectrometer. To study the molecular composition of high molecular weight organics, electrospray ionization coupled with high-resolution mass spectrometry is used to probe ambient samples. These measurements of trace gases, aerosols, and cloud water are complemented by one-dimensional modeling predict atmospheric composition versus altitude and time. These studies will improve our understanding of the feedbacks between natural aerosol sources, anthropogenic emissions, and the Earth system for future climate and air quality predictions.
The Pratt group focuses on studies of interactions between atmospheric trace gases, particles, and clouds using novel mass spectrometry techniques. In particular, we tackle the major uncertainties that exist in our understanding of atmospheric composition in wintertime environments and the Polar Regions, especially in the Arctic, which is experiencing rapid sea ice loss and increasing shipping and development. We use a custom-built, field-portable single-particle mass spectrometer to measure the size and chemistry of individual particles in real-time. Trace gas composition is measured using a field-portable on-line chemical ionization mass spectrometer. To study the molecular composition of high molecular weight organics, electrospray ionization coupled with high-resolution mass spectrometry is used to probe ambient samples. These measurements of trace gases, aerosols, and cloud water are complemented by one-dimensional modeling predict atmospheric composition versus altitude and time. These studies will improve our understanding of the feedbacks between natural aerosol sources, anthropogenic emissions, and the Earth system for future climate and air quality predictions.
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论文共 169 篇作者统计合作学者相似作者
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William R Simpson,Jingqiu Mao,Gilberto J Fochesatto,Kathy S Law,Peter F DeCarlo,Julia Schmale,Kerri A Pratt,Steve R Arnold, Jochen Stutz,Jack E Dibb,Jessie M Creamean,Rodney J Weber,
ACS ES&T airno. 3 (2024): 200-222
Benjamin Heutte,Lubna Dada,Imad El Haddad, Jakob B. Pernov,Gang Chen,Kaspar R. Daellenbach,Vaios Moschos,Hélène Angot,Matthew Boyer, Nora Bergner,Jessie M. Creamean,Kerri A. Pratt,
crossref(2024)
Jamy Y. Lee,Conner Daube,Ed Fortner, Nicholas Ellsworth,Nathaniel W. May,Jason Tallant,Scott Herndon,Kerri A. Pratt
ENVIRONMENTAL SCIENCE-ATMOSPHERESno. 1 (2023): 35-48
Clare Paton-Walsh, R. Subramanian,James H. Crawford,Laura Dawidowski,H. Langley DeWitt,Lisa Emberson,Louisa Emmons,Rebecca M. Garland,Yugo Kanaya, Aderiana Mbandi,Kerri A. Pratt,Nestor Y. Rojas,
Environmental Research Lettersno. 11 (2023): 111001
Julia Schmale,Helene Angot, Benjamin Heutte, Nora Bergner,Stephen Archer, Ludovic Bariteau,Ivo Beck,Byron Blomquist,Matthew Boyer,Markus Frey,Detlev Helmig, Dean Howard,
crossref(2023)
Nora Bergner,Ivo Beck,Kerri Pratt,Jessica Mirrielees,Jessie Creamean,Markus Frey, Benjamin Heutte,Hélène Angot, Steve Arnold,Janek Uin,Stephen Springston,Sergey Matrosov,
crossref(2023)
Kerri A. Pratt,Danielle N. Maxwell,Jeffrey L. Spencer, Ethan A. Teich,Madeline Cooke, Braeden Fromwiller, Nathan Peterson,Linda Nicholas-Figueroa,Ginger V. Shultz
JOURNAL OF CHEMICAL EDUCATIONno. 5 (2023): 1788-1795
Markus M. Frey, Amélie Kirchgäßner, Floor van den Heuvel, Thomas Lachlan-Cope,Frank Stratmann,Heike Wex,Amy R. Macfarlane,Jessica Mirrielees,Kerri Pratt,Ivo Beck,Julia Schmale, Kouichi Nishimura,
crossref(2023)
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