Timothy Vaden

Hygroscopic Properties of Aerosol Organics

Lead Institution

Desert Research Institute

Principal Investigator

Douglas Lowenthal

Project type

Large-Scale EMSL Research

While organics constitute a large fraction of ambient aerosol mass, their role and effect on particle hygroscopic growth and cloud nucleation remains unclear. Organics are most often present in…

The Effect of Surface Active Organic Molecules on the Water Uptake, Shape and Density of Hygroscopic Particles of Atmospheric Importance

Lead Institution

University of Colorado at Boulder

Principal Investigator

Gayfree Ellison

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #16741. Field measurements of aerosol compositions consistently reveal that organics make up a significant fraction of the…

Integrated Experimental and Modeling Studies on Aerosol Evolution and Aging

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Rahul Zaveri

Project type

Large-Scale EMSL Research

The objectives of this project are to characterize the time evolution of aerosol size, density, composition, and mixing state in an aerosol chamber, and b) link experiments to the development and…

Chemistry of Aerosols in the North Slope of Alaska: ISDAC 2008 study.

Lead Institution

Lawrence Berkeley National Laboratory

Principal Investigator

Mary Gilles

Project type

Large-Scale EMSL Research

The ISDAC (Indirect and Semi-Direct Aerosol Campaign) field study carried out in the North Slope of Alaska 2008 was a collaborative effort sponsored by the DOE Atmospheric Radiation Measurement (ARM)…

Simultaneous Optical & Chemical Measurements of Aerosols as a Function of Relative Humidity: Bridging Laboratory and Field Measurements to Models

Lead Institution

Los Alamos National Laboratory

Principal Investigator

Manvendra Dubey

Project type

Large-Scale EMSL Research

Interactions of anthropogenic aerosols with solar radiation and clouds and are the largest source of uncertainty in climate change science. The key science gap is a lack of process-level knowledge…

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

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Rahul Zaveri

Project type

Exploratory Research

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…

The Formation and Structure of Tropical Organic/Water Aerosols

Lead Institution

University of Colorado at Boulder

Principal Investigator

Gayfree Ellison

Project type

Large-Scale EMSL Research

Atmospheric aerosols are widely recognized as key elements in many environmental issues ranging from global climate change and visibility to adverse effects on peoples health. Aerosols affect climate…

Integrated Experimental and Modeling Studies on Secondary Organic Aerosol Formation

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Rahul Zaveri

Project type

Large-Scale EMSL Research

The objectives of this project are to: a) simultaneously characterize the time evolution of hydrocarbon precursor gases as well as the chemical and physical properties of secondary organic aerosols …

Secondary Organic Aerosol Formation from Nitrate Photochemistry

Lead Institution

University of California, Irvine

Principal Investigator

Barbara Finlayson-Pitts

Project type

Large-Scale EMSL Research

Secondary organic aerosols (SOA) in the troposphere are a major component of particulate matter and hence of interest with respect to health effects, visibility and radiative forcing. However, their…

The Relationship between Particle Properties and Ice Nucleation:
Laboratory and Field Investigation and Parameterization Development

Lead Institution

University of Wyoming

Principal Investigator

Xiaohong Liu

Project type

Large-Scale EMSL Research

Atmospheric aerosols impact the climate by scattering and absorbing solar radiation and in their role as cloud condensation nuclei (CCN). Cloud properties are strongly dependent on the number of CCNs…

Chemistry and Microphysics of Small Particles

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Alla Zelenyuk-Imre

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #17498. Atmospheric aerosol particles impact the global climate by scattering solar radiation to space and in their role as cloud…

Projects