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Rahul Zaveri

Institution
Pacific Northwest National Laboratory

Projects

Instrument Testing and Deployment for the DOE CHAPS Field Campaign

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Carl Berkowitz
Project type
Large-Scale EMSL Research
We are requesting support for EMSL participation in DOEs Cumulus Humilis Aerosol Plume Study, CHAPS. This campaign is being organized by DOEs Atmospheric Sciences Program (ASP) with support from NOAA…

Secondary Organic Aerosol Formation Mechanisms and Growth Dynamics

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Large-Scale EMSL Research
Recent theoretical and laboratory studies have revealed that the timescales of secondary organic aerosol (SOA) partitioning and the associated aerosol size distribution growth dynamics depend on the…

Theoretical Evaluation of Ion Funnel Focussing for Light Ions in a Drift Tube

Lead Institution
Washington State University
Principal Investigator
Bertram Jobson
Project type
Capability Research
The object of the project is to perform some ion trajectory simulations to evaluate the potential benefit of using an ion funnel to focus light ions in the Proton Transfer Reaction Mass Spectrometer …

SEM Analysis of Rotating Drum Impactor Filter strips for biological species

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Exploratory Research
The samples to be analyzed are time-resolved filter samples taken as part of a DHS study on biologocal backgrounds at the SFP airport. These samples will be analyzed by SEM for times corresponding…

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…

Atmospheric Soil Organic Particles

Lead Institution
Purdue University
Principal Investigator
Alexander Laskin
Recent discovery of atmospheric soil organic particles (ASOP), emitted through previously unrecognized atmosphere-land-surface interactions, suggests that ASOP may have a widespread impact over a…

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…

Mapping the Role of Semivolatile Organics in Aerosol Growth Dynamics

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Large-Scale EMSL Research
Recent theoretical and laboratory studies have revealed that the timescales of secondary organic aerosol (SOA) partitioning and the associated aerosol growth kinetics depend on the complex interplay…

Innovative Aerosol Collector (Alexander's SBIR, PNNL Scope #48595)

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Exploratory Research
This proposal is a continuation of research under EMSL User Proposal #18198. Develop an innovative aerosol collector for on-line analysis of individual particulate species using Proton Transfer…

Atmospheric Soil Organic Particles

Lead Institution
Purdue University
Principal Investigator
Alexander Laskin
Recent discovery of atmospheric soil organic particles (ASOP), emitted through previously unrecognized atmosphere-land-surface interactions, suggests that ASOP may have a widespread impact over a…

Innovative Aerosol Collector (Alexander's SBIR, PNNL Scope #48595)

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Exploratory Research
Develop an innovative aerosol collector for on-line analysis of individual particulate species using Proton Transfer Reaction Ion Trap Mass Spectrometer (PTR-ITMS).

(GC9)Simulation of Climate Forcing by Aerosols

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Steven Ghan
Project type
Capability Research
The largest source of uncertainty in estimates of the radiative forcing governing climate change is in the radiative forcing due to anthropogenic aerosols. Current estimates of the global mean of…

Microsampling Isotope Ratio Mass Spectrometer Development

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Helen Kreuzer
Project type
Exploratory Research
We are using a combination of laser ablation, catalytic reactor technology, and systems engineering to develop a novel device that converts the O and H in solid organic samples to CO and H2,…

(EMSL21) Computational Methods for Atmospheric Chemistry

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Carl Berkowitz
Project type
Capability Research
With the advent and ease of accessibility to massively parallel computing architecture has come a corresponding need for programming techniques tailored to Eulerian air chemistry models. These…

Synthesis and Analysis of Organic Hydroperoxide by PTR-MS

Lead Institution
National Center for Atmospheric Research
Principal Investigator
Thomas Karl
Project type
Exploratory Research
The aim of this proposal is to synthesize a few select organic hydroperoxides relevant to atmospheric chemistry and to measure them in the gas phase by Proton Transfer Reaction Mass Spectrometry…

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…

Mexico City Municipal Area Air pollution Study, 2003

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
James Cowin
Project type
Exploratory Research
This study is part of a larger international monitoring effort, to take place for 6 weeks, in and near Mexico City. The project is to examine air pollution factors, including particulates and trace…

Real Time Trace Gas Measurements by Chemical Ionization Mass Spectrometry

Lead Institution
Washington State University
Principal Investigator
Bertram Jobson
Project type
Exploratory Research
Develop and applying proton transfer reaction mass spectrometry for the real time analysis of hydrocarbons in air and on particulate matter. This technique will be evaluated for suitability for…

Secondary Organic Aerosol Formation

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Rahul Zaveri
Project type
Exploratory Research
We propose to simultaneously characterize the time evolution of hydrocarbon precursor gases as well as the chemical and physical properties of secondary organic aerosols (SOA) using an existing 8-m3…

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…