Heterogeneous nucleation of ice on anthropogenic organic particles collected in Mexico City

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This study reports on heterogeneous ice nucleation activity of predominantly organic (or coated with organic material) anthropogenic particles sampled within and around the polluted environment of Mexico City. The onset of heterogeneous ice nucleation was observed as a function of particle temperature (Tp), relative humidity (RH), nucleation mode, and particle chemical composition which is influenced by photochemical atmospheric aging. Particle analyses included computer controlled scanning electron microscopy with energy dispersive analysis of X-rays (CCSEM/EDX) and scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS). In contrast to most laboratory studies employing proxies of organic aerosol, we ... continued below

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Knopf, D.A.; Wang, B.; Laskin, A.; Moffet, R.C. & Gilles, M.K. June 20, 2010.

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This study reports on heterogeneous ice nucleation activity of predominantly organic (or coated with organic material) anthropogenic particles sampled within and around the polluted environment of Mexico City. The onset of heterogeneous ice nucleation was observed as a function of particle temperature (Tp), relative humidity (RH), nucleation mode, and particle chemical composition which is influenced by photochemical atmospheric aging. Particle analyses included computer controlled scanning electron microscopy with energy dispersive analysis of X-rays (CCSEM/EDX) and scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS). In contrast to most laboratory studies employing proxies of organic aerosol, we show that anthropogenic organic particles collected in Mexico City can potentially induce ice nucleation at experimental conditions relevant to cirrus formation. The results suggest a new precedent for the potential impact of organic particles on ice cloud formation and climate.

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  • Journal Name: GEOPHYSICAL RESEARCH LETTERS; Journal Volume: 37; Journal Issue: 11; Related Information: Journal Publication Date: june 5 2010

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  • Report No.: LBNL-4221E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1029/2010GL043362 | External Link
  • Office of Scientific & Technical Information Report Number: 1004596
  • Archival Resource Key: ark:/67531/metadc840515

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 20, 2010

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • July 26, 2016, 5:43 p.m.

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Knopf, D.A.; Wang, B.; Laskin, A.; Moffet, R.C. & Gilles, M.K. Heterogeneous nucleation of ice on anthropogenic organic particles collected in Mexico City, article, June 20, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc840515/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.