Index Catalog // ScholarsArchive@OSU

Creator:: DeMott, Paul J., Rogers, David C., Kreidenweis, Sonia M., Chen, Yalei, Twohy, Cynthia, Heymsfield, Andrew J., Chan, K. Roland, and Baumgardner, Darrel
Abstract:: A temperature spectrum if heterogeneous freezing nuclei concentrations in continental air in the upper troposphere was determined based on airborne measurements. Numerical model simulations incorporating ice formation by heterogeneous and homogeneous freezing of deliquesced soluble aerosol particles were performed to investigate the effect of the heterogeneous freezing nuclei were predicted...
Resource Type:: Article

Creator:: Twohy, Cynthia, Kreidenweis, Sonia M., Eidhammer, Trude, Browell, Edward V., Heymsfield, Andrew J., Bansemer, Aaron R., Anderson, Bruce E., Chen, Gao, Ismail, Syed, DeMott, Paul J., and Van Den Heever, Susan C.
Abstract:: Many soil-derived particles dominated by insoluble material, including Saharan dusts, are known to act as ice nuclei. If, however, dust particles can compete with other atmospheric particle types to form liquid cloud droplets, they have a greater potential to change climate through indirect effects on cloud radiative properties and to...
Resource Type:: Article

Creator:: Twohy, Cynthia, DeMott, Paul J., Pratt, Kerri A., Subramanian, R., Kok, Gregory L., Murphy, Shane M., Lersch, Traci, Heymsfield, Andrew J., Wang, Zhien, Prather, Kim A., and Seinfeld, John H.
Abstract:: Ice concentrations in orographic wave clouds at temperatures between −24° and −29°C were shown to be related to aerosol characteristics in nearby clear air during five research flights over the Rocky Mountains. When clouds with influence from colder temperatures were excluded from the dataset, mean ice nuclei and cloud ice...
Resource Type:: Article

Creator:: Pratt, Kerri A., Heymsfield, Andrew J., Twohy, Cynthia, Murphy, Shane M., DeMott, Paul J., Hudson, James G., Subramanian, R., Wang, Zhien, Seinfeld, John H., and Prather, Kimberly A.
Abstract:: During the Ice in Clouds Experiment–Layer Clouds (ICE-L), aged biomass-burning particles were identified within two orographic wave cloud regions over Wyoming using single-particle mass spectrometry and electron microscopy. Using a suite of instrumentation, particle chemistry was characterized in tandem with cloud microphysics. The aged biomass-burning particles comprised ~30%–40% by number...
Resource Type:: Article

Creator:: Pratt, Kerri A., Twohy, Cynthia, Murphy, Shane M., Moffet, Ryan C., Heymsfield, Andrew J., Gaston, Cassandra J., DeMott, Paul J., Field, Paul R., Henn, Tobias R., Rogers, David C., Gilles, Mary K., Seinfeld, John H., and Prather, Kimberly A.
Abstract:: During the Ice in Clouds Experiment‐Layer Clouds (ICE‐L), dry lakebed, or playa, salts from the Great Basin region of the United States were observed as cloud nuclei in orographic wave clouds over Wyoming. Using a counterflow virtual impactor in series with a single‐particle mass spectrometer, sodium‐potassium‐magnesium‐calcium‐chloride salts were identified as...
Resource Type:: Article

Creator:: Prenni, Anthony J., DeMott, Paul J., Twohy, Cynthia, Poellot, Michael R., Kreidenweis, Sonia M., Rogers, David C., Brooks, Sarah D., Richardson, Matthew S., and Heymsfield, Andrew J.
Abstract:: A continuous flow diffusion chamber (CFDC) was used to measure ice formation by cloud particle residuals during the Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment. These measurements were directed toward determining the relative contributions of homogeneous nucleation, heterogeneous nucleation, and secondary ice formation processes to...
Resource Type:: Article

Creator:: Gerber, H., Twohy, Cynthia, Gandrud, Bruce W., Heymsfield, Andrew J., McFarquhar, Greg M., DeMott, Paul J., and Rogers, David C.
Abstract:: Measurements of ice water content (IWC) and mean ice-crystal size and concentration made by two in-situ probes, C, VI and PVM, were compared on the DC-8 aircraft during SUCCESS flights in orographic ice clouds. The comparison of 1WC in these wave clouds, that formed at temperatures of about -38 °C...
Resource Type:: Article

ScholarsArchive@OSU