Type
Text
Type
Thesis
Advisor
Mak, John E | Knopf, Daniel A | Aller, Josephine Y
Date
2011-12-01
Keywords
Environmental science
Department
Department of Marine and Atmospheric Science
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/71389
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
Biomass burning is a major source of water soluble and water insoluble organic compounds in the atmosphere. These compounds have the potential to form ice via homogeneous and heterogeneous mechanisms, both of which are involved in the formation of cirrus clouds with subsequent effects on the global radiative budget. Aqueous levoglucosan/(NH4)2SO4 droplets of mass ratio 10:1, 1:1, 1:5, and 1:10 and aqueous multi component organic droplets with and without (NH4)2SO4 serve as surrogates of water soluble organic biomass compounds to be examined for homogeneous ice nucleation. Pahokee Peat and Leonardite serve as sur- rogates of aerosols composed of HULIS, employed for immersion mode heterogeneous ice nucleation. Homogeneous and heterogeneous freezing and melting temperatures were experi- mentally obtained for all particle systems over a water activity range of 1.0 - 0.8. Subsequent homogeneous and heterogeneous ice nucleation rates were derived and analyzed based on water activity based theory. Contact angles were derived for the two ice nuclei at atmospher- ically relevant conditions. Cumulative and differential freezing spectra are calculated from freezing data for the two ice nuclei. Atmospheric implications are also discussed. | 62 pages
Recommended Citation
Rigg, Yannick, "Homogenous and Heterogeneous Ice Nucleation from Biomass Burning Aerosol: Freezing Temperatures and Nucleation Rates" (2011). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 595.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/595