K
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
Hygroscopicity and composition of Alaskan Arctic CCN during April 2008
Richard H. Moore,Roya Bahreini,Roya Bahreini,Charles A. Brock,Karl D. Froyd,Karl D. Froyd,J. Cozic,J. Cozic,John S. Holloway,John S. Holloway,Ann M. Middlebrook,Daniel M. Murphy,Athanasios Nenes +12 more
TL;DR: In this paper, the authors present a comprehensive characterization of cloud condensation nuclei (CCN) sampled in the Alaskan Arctic during the 2008 Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) project, a component of the POLARCAT and International Polar Year (IPY) initiatives.
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Experimental Thermodynamics of Cluster Ions Composed of H2SO4 and H2O. 1. Positive Ions
Karl D. Froyd,Edward R. Lovejoy +1 more
TL;DR: In this article, the authors measured equilibrium constants for the reactions of H 2 O with the cluster ions, H 2 SO 4 s (H 2 O) w, s ≤ 4 and w ≤ 15, over a range of temperatures.
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Experimental Thermodynamics of Cluster Ions Composed of H2SO4 and H2O. 2. Measurements and ab Initio Structures of Negative Ions
Karl D. Froyd,Edward R. Lovejoy +1 more
TL;DR: In this paper, temperature-dependent equilibrium constants for the reactions of H2O with the H+SO4s(H2O)w cluster ions using an ion flow reactor were measured.
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Cloud condensation nuclei as a modulator of ice processes in Arctic mixed-phase clouds
Sara Lance,Sara Lance,Matthew D. Shupe,Matthew D. Shupe,Graham Feingold,Charles A. Brock,J. Cozic,J. Cozic,John S. Holloway,John S. Holloway,Richard H. Moore,Athanasios Nenes,Joshua P. Schwarz,Joshua P. Schwarz,J. R. Spackman,J. R. Spackman,Karl D. Froyd,Karl D. Froyd,Daniel M. Murphy,Jerome Brioude,Jerome Brioude,Owen R. Cooper,Owen R. Cooper,Andreas Stohl,John F. Burkhart,John F. Burkhart +25 more
TL;DR: In this article, cloud condensation nuclei (CCN) concentrations are important for modulating ice formation of Arctic mixed-phase clouds, through modification of the droplet size distribution.
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Sampling the composition of cirrus ice residuals
TL;DR: Cirrus are high altitude clouds composed of ice crystals as mentioned in this paper, which are the first tropospheric clouds that can scatter incoming solar radiation and the last which can trap outgoing terrestrial heat.