Award Abstract #0521643
Acquisition of Instrumentation for Enhancing Studies of Aerosol-Cloud Interactions

NSF Org:	ATM Division of Atmospheric Sciences
Initial Amendment Date:	August 26, 2005
Latest Amendment Date:	August 26, 2005
Award Number:	0521643
Award Instrument:	Standard Grant
Program Manager:	Anne-Marie Schmoltner ATM Division of Atmospheric Sciences GEO Directorate for Geosciences
Start Date:	September 1, 2005
Expires:	August 31, 2008 (Estimated)
Awarded Amount to Date:	$908758
Investigator(s):	Sonia Kreidenweis sonia@atmos.colostate.edu (Principal Investigator) Paul DeMott (Co-Principal Investigator) Jeffrey Collett (Co-Principal Investigator)
Sponsor:	Colorado State University 601 S Howes St Fort Collins, CO 80523 970/491-1101
NSF Program(s):	PHYSICAL & DYNAMIC METEOROLOGY, ATMOSPHERIC CHEMISTRY, MAJOR RESEARCH INSTRUMENTATION
Field Application(s):	0000099 Other Applications NEC
Program Reference Code(s):	OTHR, 4444, 1524, 1522, 1189, 0000
Program Element Code(s):	1525, 1524, 1189

ABSTRACT

This project involves the purchase of a suite of instruments to study the detailed physical and chemical properties of aerosols and clouds. The instruments are a high-resolution Time-of-Flight Aerosol Mass Spectrometer from Aerodyne for on-line particle composition measurements; a Particle Phase Discriminator for distinguishing supercooled cloud droplets from small ice crystals; a Liquid Chromatograph-Mass Spectrometer for improved characterization of polar organic material in aerosol particles, fog, and clouds; a Cloud Condensation Nucleus counter for detection of aerosol particles that can be used to measure cloud droplet formation, and an Aerosol Generation and Sizing System for the generation of aerosol particles of known size and composition for laboratory studies of cloud nucleation. The planned measurements are central to many key questions in air quality, climate change and hydrological cycling in the atmosphere at the present time, such as the indirect effect of aerosols on climate.

The instrumentation will support Colorado State University projects on ice nucleation on aerosol particles, studies of aerosol processing by clouds and fogs, studies of the relationships between particle composition, water uptake, cloud drop/ice crystal formation, and studies of hygroscopic and freezing properties of biogenic and smoke aerosols. A number of academic courses are expected to benefit from the equipment acquisition, and graduate students will gain useful training experience in the use of such equipment. These instruments are also to be made available to researchers outside Colorado State University on a paying basis.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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C.M. Carrico, M.D. Petters, S.M. Kreidenweis, J.L. Collett, Jr., G. Engling, and W.C. Malm.  "Aerosol Hygroscopicity and Cloud Droplet Activation of Extracts of Filters from Biomass Burning Experiments,"  J. Geophys. Res.,  v.113,  2008,  p. D08206.

Koehler, K., S. M. Kreidenweis, P. J. DeMott, A. J. Prenni, and M. D. Petters.  "Potential impact of Owens (dry) Lake dust on warm and cold cloud formation,"  Journal of Geophysical research,  2007,  p. D.

Koehler, K., S. M. Kreidenweis, P. J. DeMott, A. J. Prenni, and M. D. Petters.  "Potential impact of Owens (dry) Lake dust on warm and cold cloud formation,"  Journal of Geophysical Research,  v.112,  2007,  p. D12210.

Popovicheva O. B., Persiantseva N. M., Shonija N. K., P. J. DeMott, K. Koehler, M. D. Petters, S. M. Kreidenweis, V. Tishkova, B. Demirdjian, J. Suzanne.  "Water interaction with hydrophobic and hydrophilic soot particles,"  Phys. Chem. Chem. Phys.,  v.10,  2008,  p. 125.

S. Raja, R. Raghunathan, X.-Y. Yu, T. Lee, J. Chen,R. Kommalapati, K. Murugesan, X. Shen, Y. Qingzhong, K. Valsaraj, J. Collett.  "Fog chemistry in the Texas-Louisiana Gulf Coast Corridor,"  Atmospheric Environment,  v.42,  2008,  p. 2048.


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