News from the Donaldson Group


Welcome Juan!

Posted on June 14, 2017

The Donaldson Group growth spurt is continuing! Welcome to our new summer student, Juan!

Welcome Adam and Isabelle!

Posted on May 3, 2017

The Donaldson Group has miraculously doubled in size! Welcome to our new summer students, Adam and Isabelle!

Laura presents at ACS 2017 in San Fransisco!

Posted on April 6, 2017

Congratulations to Laura for attending her first conference and giving a talk entitled "Fluorescence of humic acids in seawater".

Congratulations to Dr. Angela Hong!

Posted on December 1, 2016

Angela successfully defended her thesis entitled “Surface and Photochemistry of Oxidant Precursors on Atmospherically Relevant Aqueous Interfaces”. Congratulations Angela!

Welcome to Jessica, our new graduate student!

Posted on September 20, 2016

We are pleased to welcome Jessica Clouthier to the group! Jessica will be joining the group as a Masters Student. Please stay tuned for her bio and research interests.

Congratulations, Dr. Baergen!

Posted on September 9, 2016

Alyson successfully defended her thesis entitled “Illuminating Urban Grime: The Atmospheric Impact of Urban Grime Photochemistry”. Congratulations Alyson!

Mark shares his summer research at the Undergraduate Poster Session

Posted on August 22, 2016

Mark presented his summer research under the title of "Predicting the Evaporation Rate and Deliquescence Using Accoustic Levitation." His research worked off of Nicole's earlier work as he focused on looking at the effects of high versus low relative humidity on the evaportation rate and deliquescence of different solutions. Well done Mark!

Goodbye Karen!

Posted on July 8, 2016

We say goodbye to Karen today as she leaves the group after graduating. It has been an honor and a privelege! We wish her all the best.

New publication from Alyson

Posted on May 24, 2016

Alyson's recent paper, Formation of reactive nitrogen oxides from urban grime photochemistry, has been published in Atmospheric Chemistry and Physics: Atmos. Chem. Phys., 16, 6355-6363.

Welcome Mark!

Posted on May 9, 2016

We welcome Mark Croxall to the group to work with us during the summer. Mark will be following in Nicole's footsteps as he continues to work with droplets using the accoustic levitator.

Congratulations, Nicole!

Posted on April 22, 2016

Nicole has officially completed her MSc. thesis: "Measurements of aqueous droplet evaporation rate as a function of solute species." Congratulations, Nicole!

Congratulations, Karen!

Posted on April 1, 2016

Karen did a great job presenting her research, "Nitrate photolysis in snow: Influence of temperature and salt concentration on gas phase products," at the CHM499 Poster Session. Congratulations, Karen!

ACP Discussion paper from Alyson

Posted on March 4, 2016

Alyson's recent research on the formation of reactive nitrogen oxides from urban grime photochemistry is up for discussion at Atmospheric Chemistry and Physics.

Nicole's MSc. Seminar

Posted on February 29, 2016

Tomorrow Nicole will be presenting the results from her MSc. research, studying the effects of solutes on the evaporation of water from droplets, at the Environmental Chemistry Seminar: 2 PM in Davenport East.

Alyson returns to Leipzig

Posted on February 26, 2016

Tomorrow Alyson will be crossing the Atlantic to visit Leipzig, Germany and collaborate with TROPOS scientists to model the impact of grime photochemistry in urban environments.


Alyson presents at the AGU

December 2015

Alyson presented her recent research, HONO Formation from the Heterogeneous Photochemistry of Nitrogen Oxides on Urban Grime, at the AGU Fall Meeting.

Angela is on exchange in Switzerland

October 2015

Angela is on a 6 month IACPES exchange at the Paul-Sherrer Institute in Villigen, Switzerland, where she will be working with Dr. Thorsten Bartels-Rausch. Enjoy the Alps!

Alyson featured in The Varsity

Posted on September 21, 2015

The Varsity, U of T's student newspaper, spoke with Alyson about "going viral" after the ACS press release on her research. Read the article here!

Welcome, Laura & Karen!

Posted on September 11, 2015

The Donaldson Group has expanded by 2! Welcome to our new PhD student, Laura Stirchak, and undergraduate thesis student, Karen Morenz!

Alyson's research on urban grime in the press!

Posted on August 19, 2015

Jamie spoke with the press at ACS Boston to discuss Alyson's research on the photochemistry of urban grime, which suggests that grime is not a permanent sink for nitrogen oxides. Watch the press conference here!

Dr. Styler begins research group at the University of Alberta!

Posted on August 10, 2015

Dr. Sarah A. Styler, Donaldson Group alumna, is a new assistant professor at the University of Alberta! Her research group will study the chemistry of atmospheric aerosols in polluted urban environments. Congratulations, Dr. Styler!

Jamie and Nicole present at CSC 2015 in Ottawa

Posted on June 17, 2015

Jamie gave a talk discussing what we still don't understand about snowpack chemistry, and Nicole presented her first poster on the evaporation of water from aqueous salt droplets.


Alyson Studies Grime Abroad!

October 2014

Alyson went to Leipzig, Germany where she investigated Urban Grime chemistry, comparing grime composition with that of particulate matter over a 6 week field study in collaboration with TROPOS and Dr. Sarah Styler.

Welcome, Nicole!

September 2014

The Donaldson Group welcomed Nicole, our new MSc student, with an afternoon sail on Lake Ontario!

Angela in Utah!

February 2014

Angela is participating in the UWBOS 2014 study, measuring nitrogen oxides and ozone within and directly above the snow. She hopes to probe the air-ice chemical interaction of reactive nitrogen species in order to understand their role in wintertime ozone pollution in the Uintah Basin, UT.

Congratulations, Elyse!

January 2014

Elyse successfully presented her MSc thesis, "The Influence of Organic Coatings on Atmospheric Processes at the Air-Water Interface." Congratulations, Elyse!


Congratulations, Dr. Styler!

Posted on December 5, 2013

Sarah successfully defended her PhD thesis, "Heterogeneous Photochemistry of Atmospheric Dusts and Organic Films," on November 27. Congratulations, Sarah!

New Publication from Angela and Sumi

Posted on October 15, 2013

Angela was the lead author on "Enhanced surface partitioning of nitrate anion in aqueous bromide solutions," which was published recently in J. Phys. Chem. Lett. Hear Angela and Sumi talk about this work in slideshow form on the J. Phys. Chem. Lett. website.

Sarah researches dust photochemistry in Paris!

Posted on October 15, 2013

Sarah spent the last half of September in Paris, where she investigated the interaction of dust with urban pollutants in the CESAM atmospheric chamber at the Laboratoire Inter-universitaire des Systemes Atmospheriques (LISA).

Congratulations, Dr. Reeser!

Posted on October 15, 2013

Dorea successfully defended her PhD thesis, "Effects of Aqueous Organic Coatings on the Interfacial Transport of Atmospheric Species," on September 23. Congratulations, Dorea!

Sarah and Sumi: ACCESS XII Scholars

Posted on August 17, 2013

Sumi and Sarah were selected to participate in the 12th Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS XII), which took place in Brookhaven, New York, earlier this summer. They also attended and presented posters at the Atmospheric Chemistry Gordon Conference in Vermont.

Congratulations, Dr. Wren!

Posted on August 17, 2013

Sumi successfully defended her PhD thesis, "Ion Exclusion, pH, and Halogen Activation at the Air-Ice Interface," on July 16. The group celebrated with pizza in Kensington Market. Congratulations, Sumi!

Elyse Wins an Award at the 2013 CSC in Quebec City!

Posted on June 13, 2013

Elyse won a best graduate student oral presentation award for her presentation on the effect of organic coatings on photosensitizers at atmospheric water surfaces. Congratulations, Elyse!

Sarah goes international!

Posted on June 13, 2013

Sarah received funding from the Centre for Global Change Science to support her travel to Taicang, China, where she participated in the Sino-European School on Atmospheric Chemistry. She has also received a Special Opportunity Travel Grant from the Department of Chemistry, which will support a trip to Paris to conduct smog chamber experiments.

New Publications from Dorea, Sumi, and Sarah!

Posted on June 13, 2013

Dorea's study of the effects of organic coatings on nitrogen dioxide production from aqueous nitrate photolysis has recently been published in the Journal of Physical Chemistry C.

Sarah's investigation of fluorotelomer alcohol photooxidation at the surface of dust and ash has recently been published in Environmental Science & Technology.

Sumi's study of chlorine and bromine activation at the snow surface has recently been published in Atmospheric Chemistry and Physics Discussions.

New Publication from Alyson!

Posted on February 21, 2013

Alyson's investigation of nitric acid photochemistry at the surface of urban grime has recently been published in Environmental Science & Technology.


Sarah and Sumi Win Awards at the 2012 AGU!

Posted on February 21, 2013

Both Sarah and Sumi won Outstanding Student Paper Awards for their posters at the 2012 American Geophysical Union in San Frnacisco in December.

Sarah and Sumi's European and Australian adventures

Posted on November 19, 2012

As recipients of CGCS Graduate Student awards, Sumi and Sarah will be presenting at the 2012 Graduate Student Symposium on November 29 and 30.

Sumi will discuss her work with Dr. Markus Ammann on the diffusion of volatile organic compounds through snow at the Paul Scherrer Institute in Villigen, Switzerland.

Sarah will discuss her investigations of mineral dust photochemistry with Dr. Jean-Francois Doussin at LISA in Creteil, France.

In addition, Sarah's description of her trip to Melbourne, Australia as part of the Chemistry Department's Special Opportunity Travel Grant program is now online in the Summer 2012 Graduate Newsletter.

New Publications from Sumi, Sarah, and Jamie

Posted on November 19, 2012

Sumi's investigation of pH at the surface of sea ice has just been published in Atmospheric Chemistry and Physics.

Jamie has recently contributed to a discussion of organics in environmental ices (Atmospheric Chemistry and Physics), a book volume exploring new developments in atmospheric photochemistry (Topics in Current Chemistry), and an invited feature article focusing on the influence of sea-surface chemistry and its impact on the marine boundary layer (Environmental Science & Technology).

Sarah's investigation of oxalic acid photochemistry at the surface of desert dust and volcanic ash has recently been published in Environmental Science & Technology.

Tara Gets Married!

Posted on July 13, 2012

On July 1, former group member Tara Kahan was married to her fiance, Greg! Sumi and Dorea provided music for the ceremony--group unity at its best!

CIC Poster Award for Alyson!

Posted on January 10, 2012

Alyson's poster at the 2012 CSC in Calgary, "Illuminating Urban Grime", received best graduate student poster in the environmental division. Congratulations, Alyson!

CGCS Travel Award for Sarah!

Posted on February 1, 2012

Sarah has received funding from the CGCS to support her travel to Paris in Autumn 2012 to perform research in the smog chamber at LISA .

New Publication from Elyse!

Posted on January 10, 2012

Elyse's paper investigating the effect of organic coatings on the heterogeneous reaction between gas-phase ozone and pyrene at the air-aqueous interface has recently been published in Journal of Physical Chemistry A.


New Publications from Dorea, Sarah, and Sumi

Posted on October 31, 2011

Dorea's paper investigating the heterogeneous reaction between gas-phase ozone and aqueous iodide has recently been published in Atmospheric Environment.

Sumi's study of nitrate and nitric acid at the air-aqueous interface has just been published in Chemical Physics Letters.

Sarah's investigation of the nitrate-enhanced photooxidation of atmospheric alcohols on laboratory proxies for mineral dust has just been published in Environmental Science & Technology.