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Karl D. Froyd
Researcher at Cooperative Institute for Research in Environmental Sciences
Publications - 89
Citations - 6211
Karl D. Froyd is an academic researcher from Cooperative Institute for Research in Environmental Sciences. The author has contributed to research in topics: Aerosol & Troposphere. The author has an hindex of 35, co-authored 85 publications receiving 5074 citations. Previous affiliations of Karl D. Froyd include National Oceanic and Atmospheric Administration & Pennsylvania State University.
Papers
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Journal ArticleDOI
Clarifying the Dominant Sources and Mechanisms of Cirrus Cloud Formation
Daniel J. Cziczo,Karl D. Froyd,Karl D. Froyd,Corinna Hoose,Eric J. Jensen,Minghui Diao,Mark A. Zondlo,Jessica B. Smith,Cynthia H. Twohy,Daniel M. Murphy +9 more
TL;DR: Results demonstrate that mineral dust and metallic particles are the dominant source of residual particles, whereas sulfate and organic particles are underrepresented, and elemental carbon and biological materials are essentially absent.
Journal ArticleDOI
Single-particle mass spectrometry of tropospheric aerosol particles
Daniel M. Murphy,Daniel J. Cziczo,Karl D. Froyd,P. K. Hudson,B. M. Matthew,Ann M. Middlebrook,Richard E. Peltier,Amy P. Sullivan,David S. Thomson,Rodney J. Weber +9 more
TL;DR: The Particle Analysis by Laser Mass Spectrometry (PALMS) instrument has measured the composition of single particles during a number of airborne and ground-based campaigns as discussed by the authors.
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Aerosol classification using airborne High Spectral Resolution Lidar measurements – methodology and examples
Sharon P. Burton,Richard Ferrare,Chris A. Hostetler,J. W. Hair,R. R. Rogers,Michael D. Obland,Carolyn F. Butler,A. L. Cook,David B. Harper,Karl D. Froyd +9 more
TL;DR: In this article, a methodology based on observations of known aerosol types is used to qualitatively classify the extensive set of airborne high-spectral resolution lidar measurements into eight separate types.
Journal ArticleDOI
Atmospheric ion-induced nucleation of sulfuric acid and water
TL;DR: In this article, the authors measured the thermodynamics for the growth and evaporation of small cluster ions containing H2SO4 and H2O, and incorporated these data into a kinetic aerosol model to yield quantitative predictions of ion-induced nucleation for atmospheric conditions.
Journal ArticleDOI
Biomass burning in Siberia and Kazakhstan as an important source for haze over the Alaskan Arctic in April 2008
Carsten Warneke,Carsten Warneke,Roya Bahreini,Roya Bahreini,Jerome Brioude,Jerome Brioude,Charles A. Brock,J. A. de Gouw,J. A. de Gouw,David W. Fahey,Karl D. Froyd,John S. Holloway,John S. Holloway,Ann M. Middlebrook,L. Miller,L. Miller,Stephen A. Montzka,Daniel M. Murphy,Jeff Peischl,Jeff Peischl,T. B. Ryerson,Joshua P. Schwarz,Joshua P. Schwarz,J. R. Spackman,J. R. Spackman,Patrick R. Veres,Patrick R. Veres +26 more
TL;DR: For example, during the ARCPAC (Aerosol, radiation, and cloud processes affecting Arctic Climate) airborne field experiment in April 2008 in northern Alaska, about 50 plumes were encountered with the NOAA WP-3 aircraft between the surface and 6.5 km.