colleenb

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Graduate Student
Earth and Environmental Sciences
Ocean and Climate Physics
206E Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
Fax: 
(845) 365-8157

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Fields of interest: 
air quality, tropospheric composition, modern climate change

I'm a doctoral candidate conducting research at the intersection of air quality and climate change. My dissertation centers on shifts in the tropospheric oxidation via ozone and the hydroxyl radical (OH). I am advised by Arlene M. Fiore, and Róisín Commane and A. Park Williams are my committee members.

Ozone dry deposition

Recent work by one of my advisor's past students, Olivia Clifton (now a post-doc at NCAR), highlighted strong interannual variability in ozone dry deposition at a mid-latitude forest. However, most global chemical transport models assume a constant annual profile for this process. Using sensitivity simulations that I generated with the AM3 chemistry-climate model, our work illustrates that accounting for variability in the depositional sink is necessary to accurately attribute ozone production chemistry in the summer over the Southeast USA (Baublitz et al., GRL 2020).

Developing proxies for variability in the hydroxyl radical over the remote atmosphere

OH is the primary sink for methane, the second-largest contributor to human-caused climate change, as well as a precursor to tropospheric ozone. OH is extremely reactive, with a lifetime of less than one second, precluding the development of a robust measurement network, but constraining OH variability is necessary to confidently infer methane emissions from satellite data or to project the methane lifetime in simulations of the future climate. I'm using measurements from the NASA Atmospheric Tomography (ATom) aircraft campaign to attribute the drivers of OH shifts in the remote atmosphere. I am also assessing the skill of two potential proxies for OH toward improved constraints on global models that project atmospheric composition and climate.

Education
List of degrees from highest to lowest:
Master's of Philosophy in Earth and Environmental Sciences
Columbia University
05/2020
Master's of Engineering in Environmental Engineering
University of Florida
08/2016
Bachelor's of Science in Environmental Engineering
University of Florida
12/2014
Honors & Awards: 
Outstanding Student Poster Award in Atmospheric Chemistry (2018, 2019) - American Meteorological Society Annual Conference
Sarah Langer Award for contributions to the Lamont community (2018)
Graduate Outstanding Service/Leadership Award (2016) - University of Florida
First Place Student Poster (2015) - Florida Air & Waste Management Association Conference
Attributes of an Engineer Award for Service to the Global Community (2014) - College of Engineering, University of Florida

Selected Publications:

Sensitivity of tropospheric ozone over the Southeast USA to dry deposition Baublitz, Colleen B.; Fiore, Arlene M.; Clifton, Olivia E.; Mao, Jingqiu; Li Jingli; Correa, Gus; Westervelt, Daniel; Horowitz, Larry, W.; Paulot, Fabien; Williams, Park A. Geophysical Research Letters (2020)