Welcome to the Pratt Lab blog! Dr. Kerri Pratt is an assistant professor in the Departments of Chemistry and Earth & Environmental Sciences and faculty associate of the Program in the Environment at the University of Michigan. We study atmospheric trace gases, particles, snow, and clouds and their interactions with the biosphere (forests) and cryosphere (snow and sea ice). Our interdisciplinary research has relevance to climate change, air quality, and human health. As an analytical chemistry lab, we primarily use novel mass spectrometry techniques during our field research. We invite you to follow our adventures in (and outside!) the lab!

Saturday, September 30, 2017

Welcome Nick and Christian!

Welcome Nick Ellsworth and Christian Keiser! Nick is a first-year rotation graduate student who recently received a B.S. degree at Utah Valley University, and Christian is a first-year undergraduate student participating in the Undergraduate Research Opportunity Program. Welcome to the Pratt Lab!

Friday, September 15, 2017

Arctic oil field aerosols paper published!

Congratulations to former Pratt Lab members Dr. Matt Gunsch (recent Ph.D.) and Dr. Katie Kolesar (post-doc) and current Pratt Lab Ph.D. student Rachel Kirpes for their paper describing the chemical composition of atmospheric particles transported to Utqia─ívik (Barrow), AK from the Arctic Ocean and Prudhoe Bay oil fields! "Contributions of transported Prudhoe Bay oil field emissions to the aerosol population in Utqia─ívik, Alaska" was recently published in Atmospheric Chemistry and PhysicsPlease check out the paper!

Thursday, September 7, 2017

Arctic Molecular Iodine Paper Published in PNAS!

Prof. Kerri Pratt and PhD student Angela Raso (co-advised by Prof. Paul Shepson at Purdue Univ.) completed the first measurements of Arctic tropospheric I2, produced from the sunlit coastal snowpack. Read about "Active molecular iodine photochemistry in the Arctic" in the Proceedings of the National Academy of Sciences of the U.S.A.!

Press Release Links:
Michigan News: Chemists discover molecular iodine in Arctic atmosphere, released by snowpack
Purdue News: First measurements of iodine in the Arctic reveal questions about air pollution

Tuesday, August 29, 2017

Thursday, August 24, 2017

Eclipse 2017!

On August 21st, the Pratt and Ault labs took an afternoon break to see the near-total solar eclipse over Ann Arbor! Fortunately, the unpredictable Michigan weather cooperated enough to see the 80% coverage before storm clouds rolled in. We all had a great time joining the hundreds of people who gathered on the UM Diag to view this amazing event!
The Pratt and Ault Labs on the UM Diag

Near 80% coverage, taken from a cell phone camera and behind solar eclipse glasses!
The tree canopy on the Diag acting as a camera obscura, projecting the crescent of the sun! Hundreds of spectators in the background
The cloud cover was just right to snap an unfiltered photo of the sun