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    Academic Journals

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• Laser imaging nephelometer for aircraft deployment.

  Authors:Adam T. Ahern, Frank Erdesz, Nicholas L. Wagner, Charles A. Brock, Ming Lyu, Kyra Slovacek, et al.From:Atmospheric Measurement Techniques (Vol. 15, Issue 5) Peer-Reviewed

  Mar. 4, 2022220 words Brief article Validation of remote sensing retrievals of aerosol microphysical and optical properties requires in situ measurements of the same properties. We present here an improved imaging nephelometer for measuring the...

• Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements.

  Authors:Charles A. Brock, Karl D. Froyd, Maximilian Dollner, Christina J. Williamson, Gregory Schill, Daniel M. Murphy, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 19) Peer-Reviewed

  Oct. 8, 2021488 words Article In situ measurements of aerosol microphysical, chemical, and optical properties were made during global-scale flights from 2016-2018 as part of the Atmospheric Tomography Mission (ATom). The NASA DC-8 aircraft flew from...

• Air quality implications of the Deepwater Horizon oil spill

  Authors:Ann M. Middlebrook, Daniel M. Murphy, Ravan Ahmadov, Elliot L. Atlas, Roya Bahreini, Donald R. Blake, et al.From:Proceedings of the National Academy of Sciences of the United States (Vol. 109, Issue 50) Peer-Reviewed

  Dec. 11, 2012 Author abstract, Rep...

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• Improved identification of primary biological aerosol particles using single-particle mass spectrometry

  Authors:Maria A. Zawadowicz, Karl D. Froyd, Daniel M. Murphy, and Daniel J. CziczoFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 11) Peer-Reviewed

  June 16, 2017229 words Author abstract, Bri... Measurements of primary biological aerosol particles (PBAP), especially at altitudes relevant to cloud formation, are scarce. Single-particle mass spectrometry (SPMS) has been used to probe aerosol chemical composition...

• A new method to quantify mineral dust and other aerosol species from aircraft platforms using single-particle mass spectrometry.

  Authors:Karl D. Froyd, Daniel M. Murphy, Charles A. Brock, Pedro Campuzano-Jost, Jack E. Dibb, Jose-Luis Jimenez, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 11) Peer-Reviewed

  Nov. 27, 2019408 words Article Single-particle mass spectrometry (SPMS) instruments characterize the composition of individual aerosol particles in real time. Their fundamental ability to differentiate the externally mixed particle types that...

• Radiative and chemical implications of the size and composition of aerosol particles in the existing or modified global stratosphere.

  Authors:Daniel M. Murphy, Karl D. Froyd, Ilann Bourgeois, Charles A. Brock, Agnieszka Kupc, Jeff Peischl, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 11) Peer-Reviewed

  June 11, 2021389 words Brief article The size of aerosol particles has fundamental effects on their chemistry and radiative effects. We explore those effects using aerosol size and composition data in the lowermost stratosphere along with calculations of...

• Observationally constrained analysis of sea salt aerosol in the marine atmosphere

  Authors:Huisheng Bian, Karl Froyd, Daniel M. Murphy, Jack Dibb, Anton Darmenov, Mian Chin, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 16) Peer-Reviewed

  Aug. 26, 2019347 words Author abstract, Bri...

  Atmospheric sea salt plays important roles in marine cloud formation and atmospheric chemistry. We performed an integrated analysis of NASA GEOS model simulations run with the GOCART aerosol module, in situ...

• Single-particle measurements of bouncing particles and in situ collection efficiency from an airborne aerosol mass spectrometer (AMS) with light-scattering detection

  Authors:Jin Liao, Charles A. Brock, Daniel M. Murphy, Donna T. Sueper, Andre Welti, and Ann M. MiddlebrookFrom:Atmospheric Measurement Techniques (Vol. 10, Issue 10) Peer-Reviewed

  Oct. 17, 2017335 words Author abstract, Bri... A light-scattering module was coupled to an airborne, compact time-of-flight aerosol mass spectrometer (LS-AMS) to investigate collection efficiency (CE) while obtaining nonrefractory aerosol chemical...

• Aerosol size distributions during the Atmospheric Tomography Mission (ATom): methods, uncertainties, and data products

  Authors:Charles A. Brock, Christina Williamson, Agnieszka Kupc, Karl D. Froyd, Frank Erdesz, Nicholas Wagner, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 6) Peer-Reviewed

  June 6, 2019411 words Author abstract, Bri...

  From 2016 to 2018 a DC-8 aircraft operated by the US National Aeronautics and Space Administration (NASA) made four series of flights, profiling the atmosphere from 180 m to ∼12 km...

• Clarifying the dominant sources and mechanisms of cirrus cloud formation

  Authors:Daniel J. Cziczo, Karl D. Froyd, Corinna Hoose, Eric J. Jensen, Minghui Diao, Mark A. Zondlo, et al.From:Science (Vol. 340, Issue 6138) Peer-Reviewed

  June 14, 2013119 words Author abstract, Rep...

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• Laser-induced ion formation thresholds of aerosol particles in a vacuum

  Authors:David S. Thomson and Daniel M. MurphyFrom:Applied Optics (Vol. 32, Issue 33) Peer-Reviewed

  Nov. 20, 1993117 words Article

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• Development of pyrF-based genetic system for targeted gene deletion in Clostridium thermocellum and creation of a pta mutant

  Authors:Shital A. Tripathi, Lee R. Lynd, David A. Hogsett, Nicky C. Caiazza, Jesse D. McCool, Anne K. Warner, et al.From:Applied and Environmental Microbiology (Vol. 76, Issue 19) Peer-Reviewed

  Oct. 201071 words Report

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• Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid- and high latitudes.

  Authors:Christina J. Williamson, Agnieszka Kupc, Andrew Rollins, Jan Kazil, Karl D. Froyd, Eric A. Ray, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 11) Peer-Reviewed

  June 15, 2021322 words Brief article The details of aerosol processes and size distributions in the stratosphere are important for both heterogeneous chemistry and aerosol-radiation interactions. Using in situ, global-scale measurements of the size...

• Single-particle time-of-flight mass spectrometry utilizing a femtosecond desorption and ionization laser

  Authors:Maria A. Zawadowicz, Ahmed Abdelmonem, Claudia Mohr, Harald Saathoff, Karl D. Froyd, Daniel M. Murphy, et al.From:Analytical Chemistry (Vol. 87, Issue 24) Peer-Reviewed

  Dec. 15, 201592 words Report

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• Interaction between Bacteriophage DMS3 and host CRISPR region inhibits group behaviors of Pseudomonas aeruginosa

  Authors:Michael E. Zegans, Jeffrey C. Wagner, Kyle C. Cady, Daniel M. Murphy, John H. Hammond, and George A. O'TooleFrom:Journal of Bacteriology (Vol. 191, Issue 1-2) Peer-Reviewed

  Jan. 2009117 words Author abstract, Rep...

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• Model-measurement consistency and limits of bioaerosol abundance over the continental United States.

  Authors:Maria A. Zawadowicz, Karl D. Froyd, Anne E. Perring, Daniel M. Murphy, Dominick V. Spracklen, Colette L. Heald, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 22) Peer-Reviewed

  Nov. 19, 2019256 words Brief article Due to low concentrations and chemical complexity, in situ observations of bioaerosol are geographically and temporally sparse, and this limits the accuracy of current emissions inventories. In this study, we apply a new...

• Something in the air

  Author:Daniel M. MurphyFrom:Science (Vol. 307, Issue 5717) Peer-Reviewed

  Mar. 25, 20051,323 words Article 1360LAerosol particles in the atmosphere play important roles in climate change and human health. Some of the largest uncertainties in how human activities affect climate come from the effects of aerosols (1)....

• The distribution of sea-salt aerosol in the global troposphere

  Authors:Daniel M. Murphy, Karl D. Froyd, Huisheng Bian, Charles A. Brock, Jack E. Dibb, Joshua P. DiGangi, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 6) Peer-Reviewed

  Apr. 2, 201970 words Author abstract, Bri... Byline: Daniel M. Murphy, Karl D. Froyd, Huisheng Bian, Charles A. Brock, Jack E. Dibb, Joshua P. DiGangi, Glenn Diskin, Maximillian Dollner, Agnieszka Kupc, Eric M. Scheuer, Gregory P. Schill, Bernadett Weinzierl,...

• Investigating biomass burning aerosol morphology using a laser imaging nephelometer

  Authors:Katherine M. Manfred, Rebecca A. Washenfelder, Nicholas L. Wagner, Gabriela Adler, Frank Erdesz, Caroline C. Womack, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 3) Peer-Reviewed

  Feb. 8, 201866 words Brief article, Repor... Byline: Katherine M. Manfred, Rebecca A. Washenfelder, Nicholas L. Wagner, Gabriela Adler, Frank Erdesz, Caroline C. Womack, Kara D. Lamb, Joshua P. Schwarz, Alessandro Franchin, Vanessa Selimovic, Robert J. Yokelson,...

• SAM-CAAM: A Concept for Acquiring Systematic Aircraft Measurements to Characterize Aerosol Air Masses

  Authors:Ralph A. Kahn, Tim A. Berkoff, Charles Brock, Gao Chen, Richard A. Ferrare, Steven Ghan, et al.From:Bulletin of the American Meteorological Society (Vol. 98, Issue 10) Peer-Reviewed

  Oct. 20178,027 words Article 1660LABSTRACT SAM-CAAM aims to characterize particle properties statistically with systematic, aircraft in situ measurements of major aerosol air masses, to refine satellite data products and to improve climate and air...