Atmospheric Science Seminar: "Atmospheric Aerosol Sources and Chemical Composition in the Changing Arctic"

Presented by: Dr. Kerri Pratt, University of Michigan

Abstract:
Unprecedented summertime Arctic sea ice loss is leading to increasing open water, thinning sea ice, ship traffic, and development. Arctic aerosol emissions are expected to rise with increasing oil and gas activities and the production of sea spray aerosol. These particles have significant climate effects, including interacting with radiation, forming cloud droplets and ice crystals, and depositing onto surfaces. Development may also be changing the air quality of native villages, leading to human health impacts. Given the complexity and evolving nature of atmospheric aerosols, as well as the challenges associated with Arctic measurements, significant uncertainties remain in our understanding of aerosol sources, evolution, and impacts in the Arctic. The Pratt Lab has conducted several field campaigns in the Alaskan Arctic, identifying aerosol sources and atmospheric aging pathways over multiple seasons. We primarily focus on the use of single-particle mass spectrometry and computer-controlled scanning electron microscopy with energy-dispersive X-ray spectroscopy to measure the chemical composition of individual atmospheric particles. I will discuss results of studies conducted near Utqiagvik (Barrow) and Oliktok Point (Prudhoe Bay), Alaska.

Category

Atmospheric Science Seminars

Time

Location

Sir James Dunn Building, Room 101

Additional Information

http://prattlab.chem.lsa.umich.edu/