Dr. Gannet G. Hallar

LETTER OF APPT RESEARCH
47616e6e65742e48616c6c6172406472692e656475
970-819-0968
high elevation atmospheric science, cloud microphysics, Aerosols

Professional Interests

In 2003, Dr. Hallar completed her Ph.D. in the Department of Atmospheric and Oceanic Sciences at the University of Colorado at Boulder. Supported by a National Research Council Postdoctoral Fellowship, she worked at NASA Ames Research Center from 2004 2006. In 2006, Dr. Hallar also worked as an adjunct faculty at Santa Clara State University. Most recently as an Assistant Research Professor with the Desert Research Institute, she directs Storm Peak Laboratory, a high elevation atmospheric science facility in Steamboat Springs, Colorado. This laboratory has undergone major changes under her leadership including new instrumentation, new research foci, new field courses, and a significant building expansion. Currently, at Storm Peak Laboratory, Dr. Hallar also work as adjunct faculty for the University of Nevada, Reno and teaches a graduate level field course in Mountain Meteorology.

The overarching theme of Dr. Hallars research is using high quality measurements of trace gases, aerosol physical and chemical properties, and cloud microphysics to understand connections between the biosphere, atmosphere, and climate, along with the impact of anthropogenic emissions on these connections. More specifically, currently her research uses high elevation sites, combined with airborne measurements, to study the formation processes of Cloud Condensation Nuclei (CCN) and Ice Nuclei (IN) and how differing formation processes impact mixed-phase cloud microphysics. This research topic is stemmed in many potential formation mechanisms of aerosols, including nucleation, secondary organic aerosols, and primary biological aerosol particles (PBAPs).

In addition to her research, Dr. Hallar leads two large National Science Foundation programs to support diversity in the atmospheric sciences. Geoscience Research at Storm Peak (GRASP) is a program providing mentoring and field research experiences for a diverse group of undergraduate students. Atmospheric Science Collaborations and Enriching NeTworks (ASCENT) is a program focusing on women in atmospheric science/meteorology to initiate positive professional relationships among female faculty of different ranks and postdoctoral researchers.

Research Areas

  • Cloud Microphysics
  • In Situ Trace Gas Measurements
  • Aerosol Optical Properties

Research Web Site

Education

DegreeInstitutionArea
Ph.D. University of Colorado at Boulder Atmospheric and Oceanic Sciences
M.S. University of Colorado at Boulder Atmospheric and Oceanic Sciences
B.S. Truman State University Physics

Professional Memberships

  • 2000-2013 Member, American Geophysical Union
  • 2001-2013 Member, American Meteorological Society

Publications & Presentations

2017

Hallar, A., Molotch, N. P., Hand, J. L., Livneh, B., McCubbin, I. B., Petersen, R., Michalsky, J., Lowenthal, D. H., Kunkel, K. E. (2017). Impacts of Increasing Aridity and Wildfires on Aerosol Loading in the Intermountain Western U.S., Environ. Res. Lett., 12, (1), doi: 10.1088/1748-9326/aa510a Article No. 014006
Kassianov, E., Pekour, M., Flynn, C., Berg, L. K., Beranek, J., Zelenyuk, A., Zhao, C., Leung, L. R., Ma, P. L., Riihimaki, L., Fast, J. D., Barnard, J., Hallar, A., McCubbin, I. B., Eloranta, E. W., McComiskey, A., Rasch, P. J. (2017). Large contribution of coarse mode to aerosol microphysical and optical properties: Evidence from ground-based observations of a transpacific dust outbreak at a high-elevation North American site, J. Atmos. Sci., 74, (5), 1431-1443, doi: 10.1175/JAS-D-16-0256.1
Taylor, N., Collins, D., Lowenthal, D. H., McCubbin, I. B., Hallar, A., Samburova, V., Zielinska, B. K., Kumar, N., Mazzoleni, L. (2017). Hygroscopic Growth of Water Soluble Organic Carbon Isolated from Atmospheric Aerosol Collected at U.S. National Parks and Storm Peak Laboratory, Atmos. Chem. Phys., 17, (4), 25552571, doi: 10.5194/acp-17-2555-2017

2016

Blossey, P. N., Moore, M., Kuang, Z., Muhlbauer, A., Lowenthal, D. H., Hallar, A., McCubbin, I. B., David, R. O., Borys, R. D., Wiegele, A., Schneider, M., Risi, C. (2016). Isotopic Fractionation in Wintertime Orographic Precipitation, 17th Conference on Mountain Meteorology: Burlington, VT, June 27, 2016-July 1, 2016
Carrico, C. M., Hand, J., Raffuse, S. M., Suda-Petters, S., Hallar, A., Moosmüller, H. (2016). Evolving Issues in Air Quality Related to a Changing Climate, Atmospheric Optics: Aerosols, Visibility, and the Radiative Balance, A&WMA Visibility Specialty Conference: Snow King Hotel, Jackson Hole, WY, September 27, 2016-September 30, 2016, Invited talk.
Hallar, A., Andrews, E., Bukowiecki, N., Jaffe, D., Lin, N. (2016). Overview of the Special Issue, Aerosol and Air Quality Research, 16, (3), 471-477, doi: 10.4209/aaqr.2016.02.0077
Hallar, A., Petersen, R., McCubbin, I. B., Lowenthal, D. H., Lee, S., Andrews, E., Yu, F. (2016). Climatology of New Particle Formation and Corresponding Precursors at Storm Peak Laboratory, Aerosol Air Qual. Res., 16, (3), 816-826, doi: 10.4209/aaqr.2015.05.0341
Lowenthal, D. H., Hallar, A., McCubbin, I. B., David, R. O., Borys, R. D., Blossey, P., Muhlbauer, A., Kuang, Z., Moore, M. (2016). Isotopic Fractionation in Wintertime Orographic Clouds. I: Isotopic Measurements, J. Atmos. Oceanic Technol., 33, (12), 2663-2678, doi: 10.1175/JTECH-D-15-0233.1
Mazzoleni, L. R., Zhao, Y., Samburova, V., Hallar, A., Lowenthal, D. H. (2016). Unraveling the Complexity of Atmospheric Aerosol: Insights from Ultrahigh Resolution Mass Spectrometry, European Geosciences Union General Assembly 2016: Vienna, Austria, April 17, 2016-April 22, 2016, Abstract EGU2016-15401
Sullivan, R. C., Crippa, P., Hallar, A., Clarisse, L., Whitburn, S., Van Damme, M., Leaitch, W. R., Walker, J. T., Khlystov, A. Y., Pryor, S. C. (2016). Using Satellite-Based Measurements to Explore Spatiotemporal Scales and Variability of Drivers of New Particle Formation, J. Geophys. Res. Atmos., 121, (20), 12217-12235, doi: 10.1002/2016JD025568
Yu, F., Luo, G., Hallar, A. (2016). Vertical profiles and seasonal variations of key parameters controlling particle formation and growth at Storm Peak Laboratory, Aerosol Air Qual. Res., 16, (3), 900-908

2015

Blossey, P. N., Moore, M., Kuang, Z., Muhlbauer, A., Lowenthal, D. H., Hallar, A., McCubbin, I. B., Borys, R. D., Wiegele, A., Schneider, M., Risi, C. (2015). Isotopic Fractionation in Snow (IFRACS) at Storm Peak Laboratory, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015
David, R. O., Lowenthal, D. H., Hallar, A., McCubbin, I. B., Avallone, L., Mace, G., Wang, Z. (2015). Ice Formation and Growth in Orographically-Enhanced Mixed-Phase Clouds, Abstract EGU2015-7776, European Geosciences Union General Assembly 2015: Vienna, Austrai, April 17, 2015
Goliff, W. S., Luria, M., Blake, D. R., Zielinska, B. K., Hallar, A., Valente, R. J., Stockwell, W. R. (2015). Nighttime air quality under desert conditions, Atmos. Environ., 114, 102-111, doi: 10.1016/j.atmosenv.2015.05.041
Hallar, A., Avallone, L., Thiry, H., Edwards, L. R. (2015). Chapter 13. ASCENT, A Discipline Specific Model to Support the Retention and Advancement of Women in Science, In Women in the Geosciences: Practical, Positive Practices Toward Parity, doi: 10.1002/9781119067573.ch13, 135-148, M.A. Holmes, S. OConnell, K. Dutt (Eds.): John Wiley & Sons, Inc., Hoboken NJ
Hallar, A., Petersen, R., Andrews, E., Michalsky, J., McCubbin, I. B., Ogren, J. (2015). Multiyear Measurements of Aerosols at Storm Peak Laboratory, a Colorado Mountain-Top Site, 2015 NOAA ESRL Global Monitoring Annual Conference: Boulder, CO, May 19, 2015
Hallar, A., Petersen, R., Andrews, E., Michalsky, J., McCubbin, I. B., Ogren, J. A. (2015). Contributions of dust and biomass-burning to aerosols at a Colorado mountain-top site, Atmos. Chem. Phys., 15, (23), 13665-13679, doi:10.5194/acp-15-13665-2015
Hallar, A., Petersen, R., Andrews, E., Ogren, J., Michalsky, J., McCubbin, I. B., Molotch, N., Hand, J. (2015). Comparable Role in Dust and and Biomass-Burning to Aerosol Optical Depth at a Colorado Mountain-top Site, Abstract 84705, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015
Kassianov, E., Pekour, M., Flynn, C., Berg, L., Beranek, J., Zelenyuk, A., Barnard, J., Hallar, A., McComiskey, A., Rasch, P. (2015). What Can AMF Observations Tell Us about Super-micron Particles?, Abstract 78948, 2015 AGU Fall Meeting: San Francisco, CA, December 12, 2015
Kristensen, T. B., Du, L., Nguyen, Q. T., Nojgaard, J. K., Bender Koch, C., Faurskov Nielsen, O., Hallar, A., Lowenthal, D. H., Nekat, B., van Pinxteren, D., Herrmann, H., Glasius, M., Kjaergaard, H. G., Bilde, M. (2015). Chemical Properties of HULIS from Different Environments, J. Atmos. Chem., 72, (1), 65-80
Mazzoleni, L. R., Samburova, V., Zhao, Y., Dalbec, M. M., Habib, D., Brege, M. A., Saranjampour, P., Hallar, A., Zielinska, B. K., Lowenthal, D. H. (2015). Ultrahigh resolution mass spectrometry fragmentation analysis for functional groups and structural insights of WSOC collected at the Storm Peak Laboratory, European Aerosol Conference (EAC 2015): Milan, Italy, September 6, 2015
Yu, F., Luo, G., Pryor, S. C., Pillai, P. R., Lee, S. H., Ortega, J., Schwab, J. J., Hallar, A., Leaitch, W. R., Aneja, V. P., Smith, J. N., Walker, J. T., Hogrefe, O., Demerjian, K. L. (2015). Spring and summer contrast in new particle formation over nine forest areas in North America, Atmos. Chem. Phys., 15, 13993-14003, doi:10.5194/acp-15-13993-2015

2014

Andrews, E., Ogren, J. A., Bonasoni, P., Marinoni, A., Cuevas, E., Hallar, A., et al, -. (2014). Temporal variability of aerosol properties at high altitude sites - a lag-autocorrelation analysis, 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Steamboat Springs, CO, August 11, 2014
David, R. O., Lowenthal, D. H., Hallar, A. (2014). The role of mesoscale dynamics on microphysics in orographic cloud during CAMPS, Poster #223, presented at the American Meteorological Society 14th Conference on Cloud Physics and Anthony Slingo Symposium: Boston, MA, July 7, 2014
David, R. O., Lowenthal, D. H., Hallar, A., McCubbin, I. B., Avallone, L. (2014). Mountaintop Cloud Microphysical Properties: A Comparison between Storm Peak Laboratory and the University of Wyoming King Air during CAMPS, Abstract SES-137_1 presented at the Global Fair and Workshop on Long-Term Observing Systems of Mountain Social-Ecological Systems: Reno, NV, July 16, 2014
David, R. O., Lowenthal, D. H., Hallar, A., McCubbin, I. B., Avallone, L., Mace, G., Wang, Z. (2014). A Comparison between Airborne and Mountaintop Cloud Microphysics, Abstract A24C-06, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Glasius, M., Hansen, A., Kristensen, K., Kristensen, T., McCubbin, I. B., Hallar, A., Petaja, T., Surratt, J. D., Worton, D. R., Kulmala, M., Goldstein, A. H. (2014). Organosulfates and Carboxylic Acids in Secondary Organic Aerosols in Coniferous Forests in Rocky Mountains (USA), Sierra Nevada Mountains (USA) and Northern Europe (Finland and Denmark), Abstract A21J-3159, (Presentation), 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Hallar, A. (2014). Effects of Bark Beetle Infestation on Secondary Organic Aerosol Precursors, 2014 Biogenic Hydrocarbons & the Atmosphere Gordon Research Conference: Girona, Spain, July 1, 2014
Hallar, A., Lowenthal, D. H., Clegg, S. L., Samburova, V., Taylor, N., Mazzoleni, L. R., Zielinska, B. K., Kristensen, T. B., McCubbin, I. B. (2014). Chemical, Biological, and Hygroscopic Properties of Aerosols at Storm Peak Laboratory, 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Site: Steamboat Springs, CO, August 11, 2014
Hallar, A., McCubbin, I. B., Huff-Hartz, K., Heald, C., Berg, A. (2014). Effects of Mountain Pine Beetle Infestation on SOA Precursors, 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Steamboat Springs, CO, August 11, 2014
Hallar, A., McCubbin, I. B., Huff-Hartz, K., Heald, C., Berg, A. (2014). Effects of Mountain Pine Beetle Infestation on Secondary Organic Aerosol Precursors in Western North America, Abstract SES-200/275, Global Fair and Workshop on Long-Term Observing Systems of Mountain Social-Ecological Systems: Reno, NV, July 16, 2014
Lowenthal, D. H., David, R. O., Borys, R. D., Hallar, A., McCubbin, I. B. (2014). Snow growth studies at Storm Peak Laboratory, Abstract SES-137_2/180 presented at the Global Fair and Workshop on Long-Term Observing Systems of Mountain Social-Ecological Systems: Reno, NV, July 16, 2014
McCubbin, I. B., Hallar, A. (2014). Overview of Scientific Activities at Storm Peak Laboratory, 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Steamboat Springs, CO, August 11, 2014
McMeeking, G., Kok, G. L., Petters, M. D., Wright, T., Hader, J., McCubbin, I. B., Hallar, A., Twohy, D. W., Toohey, C. H., DeMott, P. J., McCluskey, C., Baumgardner, D. (2014). Recent florescence-based measurements of biological particles with WIBS-4A. Abstract 373, 94th AMS Meeting: Phoenix, AZ, January 4, 2014
Petzold, A., Bundke, U., Freedman, A., Onasch, T. B., Massoli, P., Andrews, E., Hallar, A. (2014). Optical closure study on light-absorbing aerosols, Geophysical Research Abstracts, 16, (EGU2014-16644), Presented at EGU General Assembly 2014, April 27, 2014-May 2, 2014
Samburova, V., Hallar, A., Lowenthal, D. H., Mazzoleni, L. R., Murray, A., Yang, X., Zielinska, B. K. (2014). Analysis of Atmospheric Biological and Organic Aerosols Collected at High Elevation Mountain Site (Storm Peak Laboratory), Abstract SES-138/216, (Presentation), Global Fair and Workshop on Long-Term Observing Systems of Mountain Social-Ecological Systems: Reno, NV, July 16, 2014
Samburova, V., Mazzoleni, L., Laskin, A., Hallar, A., Zielinska, B. K. (2014). Analysis of Water-Soluble Organic Compounds in Atmospheric Aerosols, Air and Waste Management Association 107th Annual Conference: Long Beach, CA, June 24, 2014
Samburova, V., Murray, A., Hallar, A., Yang, X., Zielinska, B. K., Siegel, B., Beres, N. D., Engelbrecht, J. P., Moosmüller, H. (2014). Analysis of Atmospheric Biological Particles with High Resolution Microscopy Techniques, Abstract 7BA.5 presented at the American Association for Aerosol Research (AAAR) 33st Annual Conference: Orlando, FL, October 20, 2014
Samburova, V., Murray, A., Yang, X., Hallar, A., Zielinska, B. K. (2014). Analysis of Organic Tracers in Atmospheric PM2.5, Air and Waste Management Association 107th Annual Conference: Long Beach, CA, June 24, 2014
Stephens, B., Watt, A. S., Burns, A., Desai, D., Bowling, J., Ehleringer, J., Lin, A., Andrews, A., Hallar, A., McCubbin, I. B. (2014). The Diurnal Cycle of Atmospheric CO2 at Mountain Locations, 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Steamboat Springs, CO, August 11, 2014
Yu, F., Hallar, A. (2014). Difference in particle formation at a mountain-top location during the spring and summer: Implications for the role of sulfuric acid and organics in nucleation, J. Geophys. Res., 119, (21), 12246-12255, doi: 10.1002/2014JD022136
Yu, F., Hallar, A. (2014). Difference in Particle Formation at a Mountain top Location in Colorado during the Spring and Summer: Modeling and Comparison with Observations, Abstract 9NP.3, (Presentation), American Association for Aerosol Research (AAAR) 33st Annual Conference: Orlando, FL, October 20, 2014
Yu, F., Hallar, A. (2014). Implications for the role of sulfuric acid and organics in atmospheric nucleation, . Presented at the 2014 Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Steamboat Springs, CO, August 11, 2014
Yu, H., Hallar, A., McCubbin, I. B., You, Y., Sedlacek, A., Springston, S., Kanawade, V. P., Lee, Y. N., Wang, J., Kuang, C., McGraw, R. L., Mikkila, J., Lee, S. H. (2014). Sub-3 nm Particles Observed at the Coastal and Continental Sites in the United States, J. Geophys. Res., 119, 860-879, doi:10.1002/2013JD02084
Zhao, Y., Hallar, A., Mazzoleni, L. R. (2014). Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh resolution FT-ICR mass spectrometry, Atmos. Chem. Phys., 13, 20561-20610, doi:10.5194/acpd-13-20561-2013

2013

Amin, H. S., Russo, R. S., Sive, B., Hoebeke, E. R., Dodson, C. D., McCubbin, I. B., Hallar, A., Huff Hartz, K. E. (2013). Monoterpene emissions from bark beetle infested Engelmann spruce trees, Atmos. Environ., 72, 130-133
Asmi, A., Collaud Coen, M., Ogren, J. A., Andrews, E., Sheridan, P., Jefferson, A., Weingartner, E., Baltensperger, U., Bukowiecki, N., Lihavainen, H., Kivekas, N., Asmi, E., Aalto, P. P., Kulmala, M., Wiedensohler, A., Birmili, W., Hamed, A., O'Dowd, C., Jennings, S. G., Weller, R., Flentje, H., Fjaeraa, A. M., Fiebig, M., Lund Myhre, C., Hallar, A., Swietlicki, E., Kristensso, A., Lai, P. (2013). Aerosol decadal trends ? Part 2: In-situ aerosol particle number concentrations at GAW and ACTRIS stations, Atmos. Chem. Phys., 13, 895-916
Avallone, L., Hallar, A., Thiry, H., Edwards, L. M. (2013). Supporting the Retention and Advancement of Women in the Atmospheric Sciences: What women are saying, 94, (1), doi:10.1175/BAMS-D-12-00078, published on-line
Berg, A. R., Heald, C. L., Huff Hartz, K. E., Hallar, A., Meddens, A. J., Hicke, J. A., Lamarque, J. -., Tilmes, S. (2013). The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America, Atmos. Chem. Phys., 13, 3149-3161
Friedman, B., Zelenyuk, A., Beránek, J., Kulkarni, G., Pekour, M., Hallar, A., McCubbin, I. B., Thornton, J. A., Cziczo, D. J. (2013). Aerosol measurements at a high elevation site: composition, size, and cloud condensation nuclei activity, Atmos. Chem. Phys., 13, 11839-11851, doi: 10.5194/acp-13-11839-2013
Hallar, A. (2013). Chemical, Biological, and Hygroscopic Properties of Aerosol Organics at Storm Peak Laboratory, Presented at the Department of Atmospheric Science, Colorado State University: Fort Collins, CO, May 9, 2013
Hallar, A. (2013). Chemical, Biological, and Hygroscopic Properties of Aerosol Organics at Storm Peak Laboratory, Presented at the Department of Atmospheric and Oceanic Science, University of Wisconsin: Madison, WI, November 18, 2013
Hallar, A., Bowers, R., McCubbin, I. B., Wiedinmyer, C., Samburova, V. (2013). Recent Primary Biological Aerosol Measurements at Storm Peak Laboratory, Presented at Department of Earth, Atmospheric and Planetary Sciences Massachusetts Institute of Technology: Cambridge, MA, January 28, 2013
Hallar, A., Lowenthal, D. H., Clegg, S. L., Samburova, V., Taylor, N., Mazzoleni, L. R., Zielinska, B. K., Kristensen, T. B., Chirokova, G., McCubbin, I. B., Dodson, C. D., Collins, D. (2013). Chemical and hygroscopic properties of aerosol organics at Storm Peak Laboratory, . J. Geophys. Res.-Atmos., 118, 4767-4779, doi: 10.1002/jgrd.50373
Marchand, R., Mace, G., Hallar, A., McCubbin, I. B., Martrosov, S., Shupe, M. (2013). Enhanced Radar Backscattering due to Oriented Ice Particles at 95 GHz during StormVEx, J. Atmos. Oceanic Technol., 30, 2336-2351, doi: 10.1175/JTECH-D-13-00005.1
Mazzoleni, L. R., Habib, D., Zhao, Y., Dalbec, M., Samburova, V., Hallar, A., Zielinska, B. K., Lowenthal, D. H. (2013). Functional Groups and Structural Insights of Water-Soluble Organic Carbon using Ultrahigh Resolution FT-ICR Tandem Mass Spectrometry, Abstract A33I-04, presented at AGU Fall Meeting: San Francisco, CA, December 9, 2013
McMeeking, G., Kok, G. L., Petters, M. D., Wright, T., Hader, J., McCubbin, I. B., Hallar, A., Twohy, C. H., Toohey, D. W., DeMott, P. J., McCluskey, C., Baumgardner, D. (2013). Real-time Measurements of Biological Particles at Several Continental Sites using the WIBS-4A, A11B-0029, Presented at 2013 AGU Fall Meeting: San Francisco, CA, December 9, 2013
Samburova, V., Hallar, A., Mazzoleni, L. R., Saranjampour, P., Lowenthal, D. H., Kohl, S. D., Zielinska, B. K. (2013). Composition of water-soluble organic carbon in nonurban atmospheric aerosol collected at the Storm Peak Laboratory, Environ. Chem, 10, 370-380, doi: 10.1071/EN13079
Samburova, V., Mazzoleni, L., Laskin, A., Hallar, A., Zielinska, B. K. (2013). Analysis of Water-Soluble Organic Compounds in Atmospheric Aerosols, Air and Waste Management Association (AWMA conference): Chicago, IL, June 25, 2014
Samburova, V., Murray, A., Hallar, A., Zielinska, B. K. (2013). Characterization of Atmospheric Biological Particles Collected at the Storm Peak Laboratory, American Association for Aerosol Research (AAAR conference): Portland, OR, October 4, 2013
Zhao, Y., Hallar, A., Mazzoleni, L. R. (2013). Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh resolution FT-ICR mass spectrometry, Atmos. Chem. Phys, 13, 12343-12362
Zhao, Y., Mazzoleni, L. R., Samburova, V., Hallar, A., Zielinska, B. K., Lowenthal, D. H., Kohl, S. D. (2013). Multivariate Analysis of Water-Soluble Organic Carbon Molecular Formulas in Daily Samples, Abstract A31D-0122. Presented at AGU Fall Meeting: San Francisco, CA, December 9, 2013

2012

Amin, H., Atkins, P. T., Russo, R., Brown, A. W., Sive, B., Hallar, A., Huff Hartz, K. E. (2012). Effect of Bark Beetle Infestation on Secondary Organic Aerosol Precursor Emissions, Environ. Sci. Technol., 46, (11), 5696-5703
Andrews, E., Massoli, P., Hallar, A., Sedlacek, A., Freedman, A., Ogren, J. A., Sheridan, P. (2012). Absorption closure, European Aerosol Conference: Granada, Spain, September 2, 2012
Baustian, K. J., Cziczo, D. J., Wise, M. E., Pratt, K. A., Kulkarni, G., Hallar, A., Tolbert, M. A. (2012). Importance of aerosol composition, mixing state, and morphology for heterogeneous ice nucleation: A combined field and laboratory approach, J. Geophys. Res., 117, (D6), doi:1029/2011JD016784
Bowers, R. M., McCubbin, I. B., Fierer, N., Hallar, A. (2012). Seasonal variability in airborne bacterial communities at a high-elevation site, Atmos. Environ., 50, 41-49
Bowers, R. M., McCubbin, I. B., Hallar, A., Fierer, N. (2012). Seasonal variability in airborne bacterial communities at a high elevation site and their relationship to other air studies and to potential sources, AGU 2012 Fall Meeting: San Francisco, CA, December 3, 2012
Chirokova, G., Hallar, A., Lowenthal, D. H., McCubbin, I. B., Avallonne, L., Mace, G. G., Shupe, M., Oolman, L. D. (2012). Vertical distribution of liquid water in mixed-phase clouds from in-situ ground and airborne measurements during simultaneous CAMPS and StormVEx field campaigns, American Meteorological Society: Steamboat Springs, CO, August 20, 2012
Edwards, L. M., Hallar, A., Avallone, L. M., Thiry, H. (2012). ASCENT: Mentorship, Networking and Resources for Women in Atmospheric Science, Presentation, 92nd AMS Annual Meeting: New Orleans, LA, January 22, 2012
Hallar, A., Fridlind, A., Huffman, J. A. (2012). Biological Aerosol Effects on Clouds and Precipitation, EOS, Meeting Summary, December 18, 2012., 93, (51), p. 539
Hallar, A., McCubbin, I. B., Lynds, S. E., Dodson, C. D. (2012). Demonstrate the Model and Evaluation of Geoscience Research At Storm Peak (GRASP), a Field Research Experience Designed to Enhance Diversity in the Geosciences, Abstract ED54A-06, Presentation at AGU 2012 Fall Meeting: San Francisco, CA, December 3, 2012
Hallar, A., McCubbin, I. B., Novosselov, I., Gorder, R. (2012). A High Elevation Aerosol Manifold Modeling Study and Inter-comparison, Abstract A51A-0016, Presentation at AGU 2012 Fall Meeting: San Francisco, CA, December 3, 2012
Hansen, C., Hallar, A., Nauslar, N. J., Kaplan, M. L. (2012). Graduate Field Courses at Storm Peak Laboratory, Presentation, 15th Conference on Mountain Meteorology, August 20, 2012
Kristensen, T., Wex, H., Nekat, B., Nøjgaard, J. K., van Pinxteren, D., Lowenthal, D. H., Mazzoleni, L. R., Dieckmann, K., Koch, C. B., Mentel, T. F., Herrmann, H., Hallar, A., Stratmann, F., Bilde, M. (2012). Hygroscopic growth and CCN activity of HULIS from different environments, J. Geo. Res.- Atmospheres, 117, (D22)
Matrosov, S. Y., Mace, G. G., Marchand, R., Shupe, M. D., Hallar, A., McCubbin, I. B. (2012). Observations of Ice Crystal Habits with a Scanning Polarimetric W-Band Radar at Slant Linear Depolarization Ratio Mode, J. Atmos. Oceanic Technol., 29, 989-1008
Mazzoleni, L. R., Saranjampour, P., Dalbec, M. M., Hallar, A., Zielinska, B. K., Lowenthal, D. H., Kohl, S. D. (2012). Identification of Water-Soluble Organic Carbon in Nonurban Aerosols using Ultrahigh-Resolution FT-ICR Mass Spectrometry: Organic Anions, Environ. Chem., 9, (3), 285-297
Mazzoleni, L. R., Saranjampour, P., Dalbec, M. M., Samburova, V., Hallar, A., Zielinska, B. K., Lowenthal, D. H. (2012). Molecular Composition of Water-Soluble Organic Carbon in Nonurban Aerosols, American Association for Aerosol Research (AAAR) 31st Annual Meeting: Minneapolis, MN, October 8, 2012
Ogren, J. A., Collaud Coen, M., Asmi, A., Andrews, E., Aalto, P. P., Asmi, E., Baltensperger, U., Birmili, W., Bukowiecki, N., Day, D., Fiebig, M., Fjaeraa, A. M., Flentje, H., Hallar, A., Hamed, A., Hyvarinen, A., Jefferson, A., Jennings, S. G., Kivekas, N., Kouvarakis, G., Kulmala, M., Lihavainen, H., Lund Myhre, C., Malm, W. C., Mihapopoulos, M., Molenar, J. V., O'Dowd, C., Schichtel, B. A., Sheridan, P., Virkkula, A., Weingartner, E., Weller, R., Wiedensohler, A., Laj, P. (2012). Aerosol decadal trends: In-situ measurements of number concentration and optical properties, Submitted for oral presentation at 11th AEROCOM Workshop: Seattle, WA, September 10, 2012
Pina, A., Hallar, A., Salazar, V., Chirokova, G. (2012). Comparison of Microphysical Cloud Properties from the FSSP and CDP during CAMPS Field Campaign, 92nd American Meteorological Society Annual Meeting: New Orleans, LA, January 24, 2012

2011

Hallar, A., Chirokova, G., McCubbin, I. B., Painter, T. H., Wiedinmyer, C., Dodson, C. D. (2011). Atmospheric bioaerosols transported via dust storms in the western United States, Geophys Res Lett, 38, (17), doi:10.1029/2011GL048166L17801
Hallar, A., Lowenthal, D. H., Chirokova, G., Borys, R. D., Wiedinmyer, C. (2011). Persistent daily new particle formation at a mountain-top location, Atmos Environ, 45, (24), 4111-4115, doi:10.1016/j.atmosenv.2011.04.044
Hallar, A., McCubbin, I. B., Wright, J. M. (2011). CHANGE: A Place-Based Curriculum for Understanding Climate Change at Storm Peak Laboratory, Colorado, Bull Amer Met Soc, July 2011, 909-918, doi: 10.1175/2011BAMS3026.1

2010

Hallar, A., McCubbin, I. B., Hallar, B., Levine, R., Stockwell, W. R., Lopez, J., Wright, J. (2010). Science in the Mountains: A Unique Research Experience to Enhance Diversity in the Geosciences, J GeoScience Educ, 58, (2), 213-220
Hoyle, C. R., Boy, M., Donahue, N. M., Fry, J. L., Glasius, M., Guenther, A., Hallar, A., Huff Hartz, K., Petters, M. D., Petaja, T., Rosenoern, T., Sullivan, A. P. (2010). Anthropogenic influence on biogenic secondary organic aerosol, ACPD, 10, 19515-19566
McCubbin, I. B., Hallar, A., Lowenthal, D. H., Borys, R. D., Obrist, D. (2010). Overview of Storm Peak Laboratory, Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Interlaken, Switzerland, June 2010.
Obrist, D., Faïn, X., Hallar, A., McCubbin, I. B. (2010). Mercury at Storm Peak Laboratory at 3220 m, Kick-off Meeting of the Global Mercury Observation System (GMOS), Consiglio Nazionale delle Ricerche: Rome, Italy, November 2010.
Obrist, D., Hallar, A., Faïn, X., McCubbin, I. B. (2010). Atmospheric Mercury Patterns Observed at a High Elevation (3220 m a.s.l.) Research Station, Storm Peak Laboratory, in the Rocky Mountains, USA, Symposium on Atmospheric Chemistry and Physics at Mountain Sites: Interlaken, Switzerland, June 2010.
Samy, S., Mazzoleni, L. R., Mishra, S., Zielinska, B. K., Hallar, A. (2010). Water-soluble organic compounds at a mountain-top Site in Colorado, USA, Atmos Environ, 44, 1663-1671
Strawa, A. W., Kirchstetter, T. W., Hallar, A., Ban-Weiss, G. A., McLaughlin, J. P., Harley, R. A., Lunden, M. M. (2010). Optical and physical properties of primary on-road vehicle particle emissions and their implications for climate change, J Aerosol Sci, 41, 36-50

2009

Bowers, R. M., Lauber, C. L., Wiedinmyer, C., Hamady, M., Hallar, A., Fall, R., Knight, R., Fierer, N. (2009). Characterization of Airborne Microbial Communities at a High-Elevation Site and their Potential to Act as Atmospheric Ice, Nuclei Appl Environ Microb, 75, (15), 1-2, doi:10.1128/AEM.00447-09
de Wekker, S. F., Ameen, A., Song, G., Stephens, B. B., Hallar, A., McCubbin, I. B. (2009). A preliminary investigation of boundary layer effects on daytime atmospheric CO2 concentrations at a mountaintop location in the Rocky Mountains, Acta Geophysica, 57, (4), 904-922, doi:10.2478/s11600-009-0033-6
Faïn, X., Obrist, D., Hallar, A., McCubbin, I. B. (2009). Speciated Mercury Measured at a High Elevation Research Station, Colorado: In Situ Conversion and Transport from the Upper Troposphere, Oral Presentation, 9th International Conference on Mercury as a Global Pollutant (9th ICMGP): Guiyang City, China, June 2009.
Faïn, X., Obrist, D., Hallar, A., McCubbin, I. B., Rahn, T. (2009). High Levels of Reactive Gaseous Mercury Observed at a High Elevation Research Laboratory in the Rocky Mountains, Atmos. Chem. Phys., 9, 8049-8060
Hallar, A., Wiedinmyer, C., McCubbin, I. B., Bowers, R. B., Fierer, N., Mazzoleni, L., Christner, B., Obrist, D., Faïn, X. (2009). A High Altitude Interdisciplinary Field Campaign The Storm Peak Aerosol and Cloud Characterization Study (SPACCS08), Mountain Research Initiative Newsletter, 2, 8-9
Wiedinmyer, C., Bowers, R. M., Fierer, N., Horanyi, E., Hannigan, M., Hallar, A., McCubbin, I. B., Baustian, K. (2009). The contribution of biological particles to observed particulate organic carbon at a remote high altitude site, Atmos Environ, 43, 4278-4282

2008

Obrist, D., Hallar, A., McCubbin, I. B., Stephens, B. B., Rahn, T. (2008). Atmospheric Mercury Concentrations at Storm Peak Laboratory in the Rocky Mountains: Evidence for Long-Range Transport from Asia, Boundary Layer Contributions, and Plant Mercury Uptake, Atmospheric Environment, 42, 7579-7589, doi: 10.1016/j.atmosenv.2008.06.051

2007

Davis, S., Avallone, L. M., Hallar, A., Engblom, W. (2007). Measurement of Total Water with a Tunable Diode Laser Hygrometer: Inlet Analysis Calibration Procedure and Ice Water Content Determination, J. Atmos. & Oceanic Techn., 24, (3), 463-475

2006

Davis, S., Hallar, A., Avallone, L. M., Campos, T., Engblom, B. (2006). Measurement of total water with a tunable diode laser hygrometer: Inlet analysis calibration procedure, and ice water content determination, J Atmos and Oceanic Technol, 24, (3), 463-475
Hallar, A., Strawa, A. W., Schmid, B., Andrews, E., Ogren, J. A., Sheridan, P. J., Ferrare, R., Covert, D. S., Elleman, R., Janssen, H., Bokarius, K., Lull, A. (2006). ARM Aerosol Intensive Operating Period: Comparison of aerosol scattering during coordinated flights, J Geophys Res, doi: 2005JD006250RR
Lopez, J. A., Fridlind, H., Jost, M., Loewenstein, M., Ackerman, A., Campos, T., Weinstock, E., Sayres, D., Smith, J. B., Pittman, J., Hallar, A., Avallone, L. M., Davis, S., Herman, R. (2006). CO signatures in subtropical convective clouds and anvils during CRYSTAL-FACE: Constraining entrainment rates with observations, J Geophys Res, doi: 2005.JD006104
Schmid, B., Ferrare, R., Flynn, C. J., Elleman, R., Covert, D. S., Strawa, A. W., Welton, E., Turner, D., Jonsson, H. H., Redemann, J., Eilers, J., Ricci, K., Hallar, A., Clayton, M., Michalsky, I., Smirnov, A., Holben, B., Barnard, J. (2006). How well can we measure the vertical profile of tropospheric aerosol extinction?, J Geophys Res, doi: 2005.JD005837
Strawa, A. W., Elleman, R., Hallar, A., Covert, D. S., Ricci, K., Provencal, R., Owano, T., Jonsson, H. H., Schmid, B., Lull, A., Bokarius, K., Andrews, E. (2006). In-Situ Measurement of Aerosol Optical Properties Made During the DOE Aerosol JOP: 1 Comparison of Extinction and Scattering Coefficients, J Geophys Res, doi: 2005JD006056

Authors

Abstract