TY - GEN
T1 - Biological ice nuclei and the impact of rain on ice nuclei populations
AU - Prenni, Anthony J.
AU - Tobo, Yutaka
AU - Garcia, Elvin
AU - DeMott, Paul J.
AU - Huffman, J. A.
AU - Hill, Thomas C.J.
AU - McCluskey, Christina S.
AU - Prenni, Jessica E.
AU - Franc, Gary D.
AU - Pöhlker, Christopher
AU - Pöschl, Ulrich
AU - Kreidenweis, Sonia M.
PY - 2013
Y1 - 2013
N2 - With 18% of total US landmass devoted to croplands, farmland is a potentially major source of biogenic particles to the atmosphere. We investigated two farms as potential sources of biological ice nuclei (IN). We found that each of these farms contained abundant INA bacteria on the vegetation; however, airborne ina gene concentrations were typically below detectable limits, demonstrating a disconnect between local vegetative sources and the air above them. The question remains, then, as to how biological IN are released into the atmosphere. In a second study, we investigated how precipitation impacted the concentration and composition of IN. Results from these measurements show that ground level IN concentrations were enhanced during rain events, and that some portion of these IN were biological. In this paper, we present results from both of these studies, and discuss modified measurement techniques aimed at characterizing the often very low number concentrations of biological IN.
AB - With 18% of total US landmass devoted to croplands, farmland is a potentially major source of biogenic particles to the atmosphere. We investigated two farms as potential sources of biological ice nuclei (IN). We found that each of these farms contained abundant INA bacteria on the vegetation; however, airborne ina gene concentrations were typically below detectable limits, demonstrating a disconnect between local vegetative sources and the air above them. The question remains, then, as to how biological IN are released into the atmosphere. In a second study, we investigated how precipitation impacted the concentration and composition of IN. Results from these measurements show that ground level IN concentrations were enhanced during rain events, and that some portion of these IN were biological. In this paper, we present results from both of these studies, and discuss modified measurement techniques aimed at characterizing the often very low number concentrations of biological IN.
KW - Biological Particles
KW - Ice nuclei
KW - Rain
UR - https://www.scopus.com/pages/publications/84877320313
U2 - 10.1063/1.4803415
DO - 10.1063/1.4803415
M3 - Conference contribution
AN - SCOPUS:84877320313
SN - 9780735411524
T3 - AIP Conference Proceedings
SP - 895
EP - 898
BT - Nucleation and Atmospheric Aerosols - 19th International Conference
T2 - 19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013
Y2 - 23 June 2013 through 28 June 2013
ER -