Aerosol Measurement Science Group Names New Co-Chairs

Published: 17 May 2022

Gannet Hallar and Timothy Onasch were recently named the new co-chairs of the Atmospheric Radiation Measurement (ARM) user facility’s Aerosol Measurement Science Group (AMSG).

Chartered in 2015 and made up of experts from ARM and the aerosol science community, the AMSG provides guidance on measurements and processes to enhance the science impacts of ARM aerosol measurements for the atmospheric research community.

Hallar and Onasch are replacing Allison McComiskey, Stephen Springston, and Connor Flynn as AMSG co-chairs.

McComiskey, the Environmental and Climate Sciences Department chair at Brookhaven National Laboratory in New York, remains on the AMSG as a science representative. Springston recently retired from Brookhaven National Laboratory in New York, where he led the ARM aerosol instrument mentor group. Flynn, a senior research associate in the University of Oklahoma School of Meteorology, continues to support ARM as an instrument mentor.

Gannet Hallar
Gannet Hallar

Hallar, a professor of atmospheric sciences at the University of Utah, is also the director of Storm Peak Laboratory in Steamboat Springs, Colorado. From 2010 to 2011, Storm Peak Laboratory was an instrument site for ARM’s Storm Peak Lab Cloud Property Validation Experiment (STORMVEX). Hallar was a member of the STORMVEX science team.

From 2015 to 2018, Hallar was on ARM’s User Executive Committee, which seeks to bridge the gap between ARM data users and managers while mentoring early career scientists interested in ARM data.

Onasch is the director of the Center for Sensor Systems and Technology at Aerodyne Research Inc. in Massachusetts, where he works on characterizing the organic content of atmospheric particles using aerosol mass spectrometry.

Timothy Onasch
Timothy Onasch

Onasch supported the operation of an aerosol mass spectrometer during ARM’s 2010 Carbonaceous Aerosol and Radiative Effects Study (CARES) in California. He also served as a co-investigator during ARM’s 2013 Biomass Burning Observation Project (BBOP), an airborne campaign conducted over the Pacific Northwest and Mississippi River Valley.

As AMSG co-chairs, Hallar and Onasch will lead the group in providing timely input to the ARM technical director to improve the operational performance, characterization, and science impact of aerosol and trace gas measurements along with the development, processing, and delivery of aerosol data products.

ARM welcomes Hallar and Onasch in their new roles and thanks McComiskey, Springston, and Flynn for their service as AMSG co-chairs.

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ARM is a DOE Office of Science user facility operated by nine DOE national laboratories.