Karl Froyd

Organization

University of Colorado, Boulder

Air Innova

Email

Contact person by email

Business Address

4985 Moorhead Ave #3103
Boulder, CO 80305
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.C.J., 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, doi:10.5194/egusphere-2023-1966 (submitted).
Katich, J.M., et al. (2023), Pyrocumulonimbus affect average stratospheric aerosol composition, Science, 379, 815-820, doi:10.1126/science.add3101.
Murphy, D.M., et al. (2023), Metals from spacecraft reentry in stratospheric aerosol particles, Proc. Natl. Acad. Sci., doi:10.1073/pnas.2313374120.
Kacenelenbogen, M.S.F., 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.M., 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.R., 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.
Kupc, 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.M., 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., 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.M., 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.C., 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.S., 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.M., 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., 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.M., 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.M., 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