Karl Froyd

Organization

University of Colorado, Boulder

Email

Contact person by email

Business Address

University of Colorado Boulder
216 UCB
Boulder, CO 80309
United States

First Author Publications

Froyd, K.D., et al. (2022), Dominant role of mineral dust in cirrus cloud formation revealed by global-scale measurements, Nat. Geosci., 15, 177-183, doi:10.1038/s41561-022-00901-w.
Froyd, K.D., et al. (2019), A new method to quantify mineral dust and other aerosol species from aircraft platforms using single-particle mass spectrometry, Atmos. Meas. Tech., 12, 6209-6239, doi:10.5194/amt-12-6209-2019.
Froyd, K.D., et al. (2010), Aerosols that form subvisible cirrus at the tropical tropopause, Atmos. Chem. Phys., 10, 209-218, doi:10.5194/acp-10-209-2010.
Froyd, K.D., et al. (2010), Contribution of isoprene-derived organosulfates to free tropospheric aerosol mass, Proc. Natl. Acad. Sci., 50, 21360-21365, doi:10.1073/pnas.1012561107.
Froyd, K.D., et al. (2009), Aerosol composition of the tropical upper troposphere, Atmos. Chem. Phys., 9, 4363-4385, doi:10.5194/acp-9-4363-2009.

Note: Only publications that have been uploaded to the ESD Publications database are listed here.

Co-Authored Publications

Bian, H., et al. (2024), Observationally constrained analysis of sulfur cycle in the marine atmosphere with NASA ATom measurements and AeroCom model simulations, Atmos. Chem. Phys., doi:10.5194/acp-24-1717-2024.
Decker, Z.D.-.N., et al. (2024), Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol, Geophys. Res. Lett., 51, e2023GL107273, doi:10.1029/2023GL107273.
Jacquot, J.L., et al. (2024), Aerosol Science and Technology, Aerosol Sci. Tech., | Views, 115 AbstractFull Text Abstract, doi:10.1080/02786826.2024.2331549.
Zhang, J., et al. (2024), Stratospheric air intrusions promote global-scale new particle formation.Science, Wang, 385, 210-216, doi:10.1126/science.adn2961.
Bian, H., et al. (2023), Observationally constrained analysis of sulfur cycle in the marine atmosphere with NASA ATom measurements and AeroCom model simulations(submitted), doi:10.5194/egusphere-2023-1966.
Katich, J.M., et al. (2023), Pyrocumulonimbus affect average stratospheric aerosol composition, Science, 379, 815-820, doi:10.1126/science.add3101.
Murphy, D., et al. (2023), Metals from spacecraft reentry in stratospheric aerosol particles, Proc. Natl. Acad. Sci., doi:10.1073/pnas.2313374120.
Kacenelenbogen, M.S., et al. (2022), Identifying chemical aerosol signatures using optical suborbital observations: how much can optical properties tell us about aerosol composition?, Atmos. Chem. Phys., doi:10.5194/acp-22-3713-2022.
Lian, S., et al. (2022), Global distribution of Asian, Middle Eastern, and North African dust simulated by CESM1/CARMA, Atmos. Chem. Phys., doi:10.5194/acp-22-13659-2022.
Zhang, L., et al. (2022), Inline coupling of simple and complex chemistry modules within the global weather forecast model FIM (FIM-Chem v1), Geosci. Model. Dev., 15, 467-491, doi:10.5194/gmd-15-467-2022.
Brock, C.A., et al. (2021), Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements, Atmos. Chem. Phys., 21, 15023-15063, doi:10.5194/acp-21-15023-2021.
Chen, X., et al. (2021), HCOOH in the Remote Atmosphere: Constraints from Atmospheric Tomography (ATom) Airborne Observations, ACS Earth Space Chem., doi:10.1021/acsearthspacechem.1c00049.
Liu, S., et al. (2021), Sea spray aerosol concentration modulated by sea surface temperature, Proc. Natl. Acad. Sci., doi:10.1073/pnas.2020583118.
Murphy, D., et al. (2021), Radiative and chemical implications of the size and composition of aerosol particles in the existing or modified global stratosphere, Atmos. Chem. Phys., 21, 8915-8932, doi:10.5194/acp-21-8915-2021.
Thompson, C., et al. (2021), The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere, Bull. Am. Meteorol. Soc., doi:10.1175/BAMS-D-20-0315.1.
Williamson, C.J., et al. (2021), Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid and high latitudes, Atmos. Chem. Phys., 21, 9065-9088, doi:10.5194/acp-21-9065-2021.
Hodzic, A., et al. (2020), Characterization of organic aerosol across the global remote troposphere: a comparison of ATom measurements and global chemistry models, Atmos. Chem. Phys., 20, 4607-4635, doi:10.5194/acp-20-4607-2020.
Straus, A., et al. (2020), The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere, Atmos. Chem. Phys., 20, 15037-15060, doi:10.5194/acp-20-15037-2020.
Schill, G.P., et al. (2020), Widespread biomass burning smoke throughout the remote troposphere, Nat. Geosci., 13, 422-427, doi:10.1038/s41561-020-0586-1.
Zeng, L., et al. (2020), Global Measurements of Brown Carbon and Estimated Direct Radiative Effects, Geophys. Res. Lett., 47, doi:10.1029/2020GL088747.
Bian, H., et al. (2019), Observationally constrained analysis of sea salt aerosol in the marine atmosphere, Atmos. Chem. Phys., 19, 10773-10785, doi:10.5194/acp-19-10773-2019.
Brock, C.A., et al. (2019), ATom: L2 In Situ Measurements of Aerosol Microphysical Properties (AMP), Ornl Daac, doi:10.3334/ORNLDAAC/1671.
Brock, C.A., et al. (2019), Aerosol size distributions during the Atmospheric Tomography Mission (ATom): methods, uncertainties, and data products, Atmos. Meas. Tech., 12, 3081-3099, doi:10.5194/amt-12-3081-2019.
Murphy, D., et al. (2019), The distribution of sea-salt aerosol in the global troposphere, Atmos. Chem. Phys., 19, 4093-4104, doi:10.5194/acp-19-4093-2019.
Ullrich, R., et al. (2019), Comparison of Modeled and Measured Ice Nucleating Particle Composition in a Cirrus Cloud, J. Atmos. Sci., 76, 1015-1029, doi:10.1175/JAS-D-18-0034.1.
Williamson, C.J., et al. (2019), ATom: In Situ Tropical Aerosol Properties and Comparable Global Model Outputs, Ornl Daac, doi:10.3334/ORNLDAAC/1684.
Williamson, C.J., et al. (2019), A large source of cloud condensation nuclei from new particle formation in the tropics, Nature, 574, 399-403, doi:10.1038/s41586-019-1638-9.
Williamson, C.J., et al. (2019), A large source of cloud condensation nuclei from new particle formation in the tropics, Nature, doi:10.1038/s41586-019-1638-9.
Yu, P., et al. (2019), Efficient In‐Cloud Removal of Aerosols by Deep Convection, Geophys. Res. Lett., 46, 1061-1069, doi:10.1029/2018GL080544.
Jensen, E.J., et al. (2018), Heterogeneous ice nucleation in the tropical tropopause layer, J. Geophys. Res., doi:10.1029/2018JD028949.
Katich, J.M., et al. (2018), ATom: Black Carbon Mass Mixing Ratios from ATom-1 Flights, Ornl Daac, doi:10.3334/ORNLDAAC/1618.
Katich, J.M., et al. (2018), Strong Contrast in Remote Black Carbon Aerosol Loadings Between the Atlantic and Pacific Basins, J. Geophys. Res., 123, 13,386-13,395, doi:10.1029/2018JD029206.
Murphy, D., et al. (2018), An aerosol particle containing enriched uranium encountered in the remote T upper troposphere, Journal of Environmental Radioactivity, 184–185, 95-100, doi:10.1016/j.jenvrad.2018.01.006.
Wofsy, S., et al. (2018), ATom: Merged Atmospheric Chemistry, Trace Gases, and Aerosols, Ornl Daac, doi:10.3334/ORNLDAAC/1581.
Marais, E.A., et al. (2016), Aqueous-phase mechanism for secondary organic aerosol formation from isoprene: application to the southeast United States and co-benefit of SO2 emission controls, Atmos. Chem. Phys., 16, 1603-1618, doi:10.5194/acp-16-1603-2016.
Yu, P., et al. (2016), Surface dimming by the 2013 Rim Fire simulated by a sectional aerosol model, J. Geophys. Res., 121, 7079-7087, doi:10.1002/2015JD024702.
Kim, P., et al. (2015), Sources, seasonality, and trends of southeast US aerosol: an integrated analysis of surface, aircraft, and satellite observations with the GEOS-Chem chemical transport model, Atmos. Chem. Phys., 15, 10411-10433, doi:10.5194/acp-15-10411-2015.
Liao, J., et al. (2015), Airborne organosulfates measurements over the continental US, J. Geophys. Res., 120, 2990-3005, doi:10.1002/2014JD022378.
Cziczo, D.J., and K.D. Froyd (2014), Sampling the composition of cirrus ice residuals, Atmos. Res., 142, 15-31, doi:10.1016/j.atmosres.2013.06.012.
Murphy, D., et al. (2014), Observations of the chemical composition of stratospheric aerosol particles, Q. J. R. Meteorol. Soc., 140, 1269-1278, doi:10.1002/qj.2213.
Cziczo, D.J., et al. (2013), Clarifying the Dominant Sources and Mechanisms of Cirrus Cloud Formation, Science, 340, 1320-1324.
Burton, S.P., et al. (2012), Aerosol classification using airborne High Spectral Resolution Lidar measurements – methodology and examples, Atmos. Meas. Tech., 5, 73-98, doi:10.5194/amt-5-73-2012.
Brock, C.A., et al. (2011), Characteristics, sources, and transport of aerosols measured in spring 2008 during the aerosol, radiation, and cloud processes affecting Arctic Climate (ARCPAC) Project, Atmos. Chem. Phys., 11, 2423-2453, doi:10.5194/acp-11-2423-2011.
Carn, S.A., et al. (2011), In situ measurements of tropospheric volcanic plumes in Ecuador and Colombia during TC4, J. Geophys. Res., 116, D00J24, doi:10.1029/2010JD014718.
Thornberry, T.D., et al. (2010), Persistence of organic carbon in heated aerosol residuals measured during Tropical Composition Cloud and Climate Coupling (TC4), J. Geophys. Res., 115, D00J02, doi:10.1029/2009JD012721.
Murphy, D., et al. (2007), Distribution of lead in single atmospheric particles, Atmos. Chem. Phys., 7, 3195-3210, doi:10.5194/acp-7-3195-2007.
Murphy, D., et al. (2006), Single-particle mass spectrometry of tropospheric aerosol particles, J. Geophys. Res., 111, D23S32, doi:10.1029/2006JD007340.

Note: Only publications that have been uploaded to the ESD Publications database are listed here.

National Aeronautics and Space Administration

National Aeronautics and
Space Administration