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!

Sunday, December 10, 2017

Come see the Pratt Lab at AGU Fall Meeting!

Come see the Pratt Lab at the 2017 American Geophysical Union Fall Meeting! Here's our line-up:

Monday, Dec. 11, 8:00-12:20, A11K, Tropospheric Composition in Cold Environments: Sources, Processes, and Impacts Posters (session co-organized by Prof. Pratt)
- PhD student Rachel Kirpes poster A11K-2015
- Postdoc Peter Peterson poster A11K-2022
- PhD student Angela Raso poster A11K-2023

Monday, Dec. 11, 13:40-15:40, A13O, Tropospheric Composition in Cold Environments: Sources, Processes, and Impacts I Oral Session (co-organized by Prof. Pratt)
- PhD student Angela Raso talk A13O-07, 15:10-15:25
- PhD student Stephen McNamara talk A13O-08, 15:25-15:40

Friday, Dec. 11, 10:20-10:35, A52H-01, Talk by Prof. Kerri Pratt: "Influences of Sources and Aqueous Processing on the Molecular Composition of Dissolved Organic Compounds in Cloud Water"

We hope to see you in New Orleans!

Friday, November 17, 2017

Michigan News cover story about UMBS prescribed burn & Pratt Lab research!

The U-M Biological Station's historic prescribed burn and the Pratt Lab contribution to measuring the resulting smoke particles was covered in a recent feature article by Michigan News! PhD students Nick and Nate were highly successful keeping three lasers aligned for particle sizing and LDI with subsequent TOF-MS analysis of individual aerosol particles while the Aerodyne Research mobile lab was moving! They measured tens of thousands of particles in a very short period of time! I'm so impressed!

Pratt Lab PhD students Nick Ellsworth and Nate May with the Aerodyne Research mobile laboratory. Image credit: Roger Hart/Michigan Photography

Tuesday, November 14, 2017

Prof. Kerri Pratt awarded ACS James J. Morgan Early Career Award in Environmental Chemistry!

Prof. Kerri Pratt was awarded the 2018 American Chemical Society James J. Morgan ES&T Early Career Award Lectureship in Environmental Chemistry! Here's link to the ACS write-up. This is the only early-career award given out by the ACS Division of Environmental Chemistry.

Monday, November 13, 2017

New Arctic molecular halogen paper published!

Congratulations to former Pratt Lab post-doc Dr. Siyuan Wang for the publication of his paper "Molecular halogens above the Arctic snowpack: Emissions, diurnal variations, and recycling mechanisms" in the Journal of Geophysical Research - Atmospheres. Dr. Wang is now a prestigious Advanced Study Program postdoctoral fellow at the National Center for Atmospheric Research in Colorado!

Welcome Jacinta!

Welcome Jacinta Edebeli! Jacinta is a third-year PhD student studying chemical reactivity in snow and ice with Prof. Dr. Markus Ammann and Dr. Thorsten Bartels-Rausch at the Paul Scherrer Institute in Switzerland. She is visiting for five months to participate in our urban snow-air interactions study in Michigan this winter! She will be deploying our ambient ion monitor-ion chromatography instrument to measure inorganic trace gases and particles.

Monday, November 6, 2017

Stephen presents CIMS research at the ANACHEM Symposium

On Nov 2, I (Stephen) attended the Detroit Association of Analytical Chemists (ANACHEM) annual symposium at Burton Manor in Livonia, MI. My poster, titled "Measurements of Trace Halogen Gases in the Alaskan Arctic using Chemical Ionization Mass Spectrometry", focused on the use of our chemical ionization mass spectrometer to measure trace halogen gases near Utqiagvik, Alaska in spring 2016. This was a great opportunity to share my work with other analytical chemists from diverse backgrounds at many of the regional universities. The plenary speaker, Prof. Paul Cremer from Penn State University, was the recipient of the 2016 ANACHEM Award and gave an excellent talk on his group's multi-disciplinary work in biophysics and biological interfaces. I was also able to catch up with my former undergraduate advisor at Michigan State, Prof. Dana Spence, and visited with the old research group!

Friday, November 3, 2017

Rachel presents at MMMS

On November 1st, I (Rachel) attended the Michigan Microscopy and Microanalysis Society meeting. I presented a poster on my work, "Multiple Approaches Applied for the Microscopic Characterization  of Atmospheric Particles show Sulfates with Unique Morphology in the Arctic".
It was also a great opportunity to learn about other research carried out at the Michigan Center for Materials Characterization and at other institutions across the state. I also learned a lot from the vendors who make the instruments and software I use regularly for my research!