Ryan D. Cook
University of Michigan
6 Papers
1 Citations
Ryan D. Cook is an academic researcher from University of Michigan. The author has contributed to research in topics: Air quality index & Particulates. The author has an hindex of 5, co-authored 5 publications.
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Papers
Direct Determination of Aerosol pH: Size-Resolved Measurements of Submicrometer and Supermicrometer Aqueous Particles.
Rebecca L. Craig,Peter K. Peterson,Lucy Nandy,Ziying Lei,Mohammed A. Hossain,Stephanie Camarena,Ryan A. Dodson,Ryan D. Cook,Cari S. Dutcher,Andrew P. Ault +9 more
TL;DR: A novel and facile method for direct measurement of size-resolved aerosol acidity from pH 0 to 4.5 is presented using quantitative colorimetric image processing of cellular phone images of (NH4)2SO4-H2 SO4 aqueous aerosol particles impacted onto pH-indicator paper.
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Observation of Road Salt Aerosol Driving Inland Wintertime Atmospheric Chlorine Chemistry.
Stephen M. McNamara,Katheryn R. Kolesar,Siyuan Wang,Rachel M. Kirpes,Nathaniel W. May,Matthew J. Gunsch,Ryan D. Cook,Jose D. Fuentes,Rebecca S. Hornbrook,Eric C. Apel,Swarup China,Alexander Laskin,Kerri A. Pratt +12 more
TL;DR: This study identifies road salt aerosol as the primary chloride aerosol source, accounting for 80–100% of ClNO2 formation, at an inland urban area in the wintertime, providing experimental evidence of the connection between road salt and air quality through the production of this important reservoir for nitrogen oxides and chlorine radicals.
Biogenic, urban, and wildfire influences on the molecular composition of dissolved organic compounds in cloud water
Ryan D. Cook,Ying Hsuan Lin,Zhuoyu Peng,Zhuoyu Peng,Eric J. Boone,Eric J. Boone,Rosalie K. Chu,James K. Dukett,Matthew J. Gunsch,Wuliang Zhang,Wuliang Zhang,Nikola Tolić,Alexander Laskin,Alexander Laskin,Kerri A. Pratt +14 more
TL;DR: In this article, the composition of high molecular weight organic compounds in cloud water was analyzed by ultra-high-resolution mass spectrometry to investigate the molecular composition of dissolved organic carbon, with a focus on sulfur- and nitrogen-containing compounds.
Urban Snowpack ClNO2 Production and Fate: A One-Dimensional Modeling Study
Siyuan Wang,Stephen M. McNamara,Katheryn R. Kolesar,Nathaniel W. May,Jose D. Fuentes,Ryan D. Cook,Matthew J. Gunsch,Claire N. Mattson,Rebecca S. Hornbrook,Eric C. Apel,Kerri A. Pratt +10 more
- 24 Jun 2020
TL;DR: In this article, Nitryl chloride (ClNO2) is formed in urban areas from the multiphase reaction of dinitrogen pentoxide (N2O5) on chloride-containing surfaces ClNO2 undergoes photolysis to produce atomic chlorine.
Wildfire Smoke Influence on Cloud Water Chemical Composition at Whiteface Mountain, New York
Jamy Y. Lee,Peter K. Peterson,Logan R. Vear,Ryan D. Cook,J. P. Sullivan,Ellie Smith,L. N. Hawkins,Nicole E. Olson,Rachel F. Hems,Philip K. Snyder,Kerri A. Pratt +10 more
- 30 Sep 2022
TL;DR: In this paper , smoke-influenced cloud water samples were characterized by enhanced concentrations of potassium, sulfate, ammonium, and total organic carbon, compared to samples lacking identified influence.
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