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Deployment of EMSL Instruments during the 2010 Carbonaceous Aerosol and Radiative Effects Study (CARES)


EMSL Project ID
35605

Abstract

The Carbonaceous Aerosol and Radiative Effects Study (CARES) will be conducted during summer 2010 in order to investigate the evolution of carbonaceous aerosols of different types and their optical and hygroscopic properties. CARES will be conducted in central California, with a focus on the Sacramento urban plume. A suite of EMSL instruments are requested to complement an extensive set of measurements planned for this field campaign, which is being organized by the DOE ARM Climate Research Facility (ACRF). Both the instrumentation and expertise of the scientists at EMSL are critical to the successful completion of the CARES objectives described in this proposal.
During summer, the Sacramento urban plume transport is controlled by highly consistent winds that draw polluted air to the northeast over the oak and pine trees in the Blodgett Forest area. The Sacramento-Blodgett Forest corridor therefore effectively serves as a mesoscale (~100 km) daytime flow reactor in which the urban aerosols undergo significant aging due to coagulation, condensation, and photochemical processes. The CARES campaign observation strategy will therefore consist of the DOE G-1 aircraft sampling upwind, within, and outside of the evolving Sacramento urban plume in the morning and again in the afternoon. The aircraft measurements will be complemented by a well-instrumented ground site within the Sacramento urban source area (“T0") and a ~60 km downwind receptor site ("T1") near Cool, CA, to characterize the diurnal evolution of meteorological variables, trace gases/aerosol precursors, and aerosol composition and properties in freshly polluted and aged urban air. EMSL instruments are requested for deployment on the G-1 and at both the T0 and T1 sites. These include measurements of trace gas mixing ratios, aerosol size distribution and composition, and aerosol optical and CCN activation properties.

Project Details

Project type
Exploratory Research
Start Date
2009-10-19
End Date
2010-03-10
Status
Closed

Team

Principal Investigator

Rahul Zaveri
Institution
Pacific Northwest National Laboratory

Team Members

Timothy Vaden
Institution
Pacific Northwest National Laboratory

Daniel Cziczo
Institution
Purdue University

Lizabeth Alexander
Institution
Environmental Molecular Sciences Laboratory

Alla Zelenyuk-Imre
Institution
Pacific Northwest National Laboratory

Alexander Laskin
Institution
Purdue University

Related Publications

Zaveri R.A., J.E. Shilling, J.D. Fast, and S.R. Springston. 2020. "Efficient Nighttime Biogenic SOA Formation in a Polluted Residual Layer." Journal of Geophysical Research: Atmospheres 125, no. 6:Article No. e2019JD031583. PNNL-SA-146860. doi:10.1029/2019JD031583