christina j williamson

2022

Dominant role of mineral dust in cirrus cloud formation revealed by global-scale measurements, Froyd, K.D., Yu, P., Schill, G.P. Brock, C.A., Kupc, A., Williamson, C.J., Jensen, E., Ray, E., Rosenlof, K.H., Bian, H., Darmenov, A.S., Colarco, P.R., Diskin, G.S., Bui, T.P., Murphy, D.M.  Nat. Geosci. 15, 177–183 (2022). https://doi.org/10.1038/s41561-022-00901-w

The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere, Thompson, C. R., Wofsy, S. C., Prather, M. J., Newman, P. A., Hanisco, T. F., Ryerson, T. B., Fahey, D. W., Apel, E. C., Brock, C. A., Brune, W. H., Froyd, K., Katich, J. M., Nicely, J. M., Peischl, J., Ray, E., Veres, P. R., Wang, S., Allen, H. M., Asher, E., Bian, H., Blake, D., Bourgeois, I., Budney, J., Bui, T. P., Butler, A., Campuzano-Jost, P., Chang, C., Chin, M., Commane, R., Correa, G., Crounse, J. D., Daube, B., Dibb, J. E., DiGangi, J. P., Diskin, G. S., Dollner, M., Elkins, J. W., Fiore, A. M., Flynn, C. M., Guo, H., Hall, S. R., Hannun, R. A., Hills, A., Hintsa, E. J., Hodzic, A., Hornbrook, R. S., Huey, L. G., Jimenez, J. L., Keeling, R. F., Kim, M. J., Kupc, A., Lacey, F., Lait, L. R., Lamarque, J., Liu, J., McKain, K., Meinardi, S., Miller, D. O., Montzka, S. A., Moore, F. L., Morgan, E. J., Murphy, D. M., Murray, L. T., Nault, B. A., Neuman, J. A., Nguyen, L., Gonzalez, Y., Rollins, A., Rosenlof, K., Sargent, M., Schill, G., Schwarz, J. P., Clair, J. M. S., Steenrod, S. D., Stephens, B. B., Strahan, S. E., Strode, S. A., Sweeney, C., Thames, A. B., Ullmann, K., Wagner, N., Weber, R., Weinzierl, B., Wennberg, P. O., Williamson, C. J., Wolfe, G. M., & Zeng, L. (2022). Bulletin of the American Meteorological Society, 103(3), E761-E790.  https://doi.org/10.1175/BAMS-D-20-0315.1

2021

Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid and high latitudes, Williamson, C. J., Kupc, A., Rollins, A., Kazil, J., Froyd, K. D., Ray, E. A., Murphy, D. M., Schill, G. P., Peischl, J., Thompson, C., Bourgeois, I., Ryerson, T., Diskin, G. S., DiGangi, J. P., Blake, D. R., Bui, T. P., Dollner, M., Weinzierl, B., Brock, C. A.: Atmos. Chem. Phys., 21, 4979–5014, 2021, doi.org/10.5194/acp-21-4979-2021

Ambient aerosol properties in the remote atmosphere from global-scale in-situ measurements, Brock, C. A., Froyd, K. D., Dollner, M., Williamson, C. J., Schill, G., Murphy, D. M., Wagner, N., Kupc, A., Jimenez, J. L., Campuzano-Jost, P., Nault, B. A., Schroder, J. C., Day, D., Price, D., Weinzierl, B., Schwarz, J. P., Kaitch, J. M., Zeng, L., Weber, R., Dibb, J., Scheuer, E., Diskin, G. S., DiGangi, J. P., Bui, T. P., Dean-Day, J. M., Thompson, C., Peischl, J., Ryerson, T., Bourgeois, I., Daube, B., Commane, R., Wofsy, S. C.: Atmos Chem Phys, 2021, doi.org/10.5194/acp-2021-173

Constraints on global aerosol number concentration, SO₂ and condensation sink in UKESM1 using ATom measurements, Ranjithkumar, A., Gordon, H., Williamson, C. J., Rollins, A., Pringle, K., Kupc, A., Abraham, N. L., Brock, C. A., Carslaw, K.: Atmos. Chem. Phys., 21, 4979–5014, 2021, doi.org/10.5194/acp-21-4979-2021

Radiative and chemical implications of the size and composition of aerosol particles in the existing or modified global stratosphere, Murphy, D. M., Froyd, K. D., Bourgeois, I., Brock, C. A., Kupc, A., Peischl, J., Schill, G. P., Thompson, C. R., Williamson, C. J., and Yu, P.: . Atmos. Chem. Phys. 21, 8915-8932, doi:10.5194/acp-21-8915-2021

Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere., Nault, B. A., Campuzano-Jost, P., Day, D. A., Jo, D. S., Schroder, J. C., Allen, H. M., Bahreini, R., Bian, H., Blake, D. R., Chin, M., Clegg, S. L., Colarco, P. R., Crounse, J. D., Cubison, M. J., DeCarlo, P. F., Dibb, J. E., Diskin, G. S., Hodzic, A., Hu, W., Katich, J. M., Kim, M. J., Kodros, J. K., Kupc, A., Lopez-Hilfiker, F. D., Marais, E. A., Middlebrook, A. M., Andrew Neuman, J., Nowak, J. B., Palm, B. B., Paulot, F., Pierce, J. R., Schill, G. P., Scheuer, E., Thornton, J. A., Tsigaridis, K., Wennberg, P. O., Williamson, C. J., and Jimenez, J. L.:  Communications Earth & Environment 2, 93, doi:10.1038/s43247-021-00164-0

2020

The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere, Kupc, A., Williamson, C. J., Hodshire, A. L., Kazil, J., Ray, E., Bui, T. P., Dollner, M., Froyd, K. D., McKain, K., Rollins, A., Schill, G. P., Thames, A., Weinzierl, B. B., Pierce, J. R., and Brock, C. A.:  Atmos. Chem. Phys., 20, 15037–15060,  doi.org/10.5194/acp-20-15037-2020

Global Measurements of Brown Carbon and Estimated Direct Radiative Effects, Zeng, L., Zhang, A., Wang, Y., Wagner, N. L., Katich, J. M., Schwarz, J. P., Schill, G. P., Brock, C., Froyd, K. D., Murphy, D. M., Williamson, C. J., Kupc, A., Scheuer, E., Dibb, J., & Weber, R. J., Geophysical Research Letters, 47(13), e2020GL088747. doi:10.1029/2020gl088747

Global airborne sampling reveals a previously unobserved dimethyl sulfide oxidation mechanism in the marine atmosphere, Veres, P. R., Neuman, J. A., Bertram, T. H., Assaf, E., Wolfe, G. M., Williamson, C. J., Weinzierl, B., Tilmes, S., Thompson, C. R., Thames, A. B., Schroder, J. C., Saiz-Lopez, A., Rollins, A. W., Roberts, J. M., Price, D., Peischl, J., Nault, B. A., Møller, K. H., Miller, D. O., Meinardi, S., Li, Q., Lamarque, J.-F., Kupc, A., Kjaergaard, H. G., Kinnison, D., Jimenez, J. L., Jernigan, C. M., Hornbrook, R. S., Hills, A., Dollner, M., Day, D. A., Cuevas, C. A., Campuzano-Jost, P., Burkholder, J., Bui, T. P., Brune, W. H., Brown, S. S., Brock, C. A., Bourgeois, I., Blake, D. R., Apel, E. C., & Ryerson, T. B., Proceedings of the National Academy of Sciences, 117(9), 4505-4510. doi:10.1073/pnas.1919344117

Widespread biomass burning smoke throughout the remote troposphere, Schill, G. P., Froyd, K. D., Bian, H., Kupc, A., Williamson, C., Brock, C. A., Ray, E., Hornbrook, R. S., Hills, A. J., Apel, E. C., Chin, M., Colarco, P. R., & Murphy, D. M.,  Nature Geoscience, 13(6), 422-+. doi:10.1038/s41561-020-0586-1

2019

A large source of Cloud Condensation Nuclei from New Particle Formation in the Tropical Upper Troposphere, Williamson, C, Kupc, A., Axisa, D., Bui, T.P., Campunzano Jost, P., Dollner, M., Froyd, K., Hodshire, A., Jimenez, J.L., Kodros, J., Luo, G., Murphy, D., Nault, B., Ray, E., Weinzier, B., Wilson, C.A., Yu, F., Yu, P., Pierce, J.R., Brock, C.A. Nature, 574,399-403, doi: 10.1038/s41586-019-1638-9

A new method to quantify mineral dust and other aerosol species from aircraft platforms using single-particle mass spectrometry, Froyd, K. D., Murphy, D. M., Brock, C. A., Campuzano-Jost, P., Dibb, J. E., Jimenez, J. L., Kupc, A., Middlebrook, A. M., Schill, G. P., Thornhill, K. L., Williamson, C. J., Wilson, J. C., & Ziemba, L. D.  Atmospheric Measurement Techniques, 12(11), 6209-6239. doi:10.5194/amt-12-6209-2019

The distribution of sea-salt aerosol in the global troposphere, Murphy, D., Froyd, K., Bian, H., Brock, C., Dibb, J., DiGangi, J., Diskin, G., Dollner, M., Scheuer, E., Schill, G., Weinzierl, B., Williamson, C., Yu, P. Atmos. Chem. Phys., 19 (6), 4093-4104, doi: 10.5194/acp-19-4093-2019

Efficient in-cloud removal of aerosols by deep convection, Yu, P., Froyd, K., Portmann, R., Toon, O.B., Fretas, S., Bardeen, C., Brock, C., Fan, T.Y., Gao, R.S., Katich, J., Kupc, A., Liu, S., Maloney, C., Murphy, D., Rosenlof, K., Schill, G., Schwarz, J., Williamson, C., Geophys. Res. Lett, 46 (2), 1061-1069, doi: 10.1029/2018GL08054

Formation of Highly Oxygenated Organic Molecules from alpha-Pinene Ozonolysis: Chemical Characteristics, Mechanism, and Kinetic Model Developments., Moltini, U. et al.,  J., ACS Earth and Space Chemistry, 3 (5) 873-883, issn: 2472-3452, doi: 10.1021/acsearthspacechem.9b00035, 2019

Aerosol size distributions during the Atmospheric Tomography Mission (ATom): methods, uncertainties, and data products, Charles A. Brock, Christina Williamson, Agnieszka Kupc, et al., Atmos. Meas. Tech, 12 3081-3099, doi: 10/5194 (2019)

2018

Modification, calibration, and performance of the Ultra-High Sensitivity Aerosol Spectrometer for particle size distribution and volatility measurements during the Atmospheric Tomography Mission (ATom) airborne campaign, Kupc, A, C Williamson, NL Wagner, M Richardson and CA Brock, Atmos. Meas. Tech., 11 (1) 369-383, issn: 1867-1381, ids: FT1FP, doi: 10.5194/amt-11-369-2018 (2018)

Fast time response measurements of particle size distributions in the 3-60 nm size range with the nucleation mode aerosol size spectrometer, Williamson, C, A Kupc, J Wilson, DW Gesler, JM Reeves, F Erdesz, R McLaughlin and CA Brock, Atmos. Meas. Tech., 11 (6) 3491-3509, issn: 1867-1381, ids: GJ7RH, doi: 10.5194/amt-11-3491-2018 (2018)

2017

Causes and importance of new particle formation in the present-day and preindustrial atmospheres, Gordon, H, et al.  J. Geophys. Res.-Atmos., 122 (16) 8739-8760, issn: 2169-897X, ids: FN9SR, doi: 10.1002/2017JD026844 (2017)

20Temperature uniformity in the CERN CLOUD chamber, Dias, A, S Ehrhart, A Vogel, C Williamson, J Almeida, J Kirkby, S Mathot, S Mumford and A Onnela, Atmos. Meas. Tech., 10 (12) 5075-5088, issn: 1867-1381, ids: FQ9LO, doi: 10.5194/amt-10-5075-2017 (2017)

2016

Global atmospheric particle formation from CERN CLOUD measurements, Dunne, E., et al.,  Science, 2016 

Reduced anthropogenic aerosol radiative forcing caused by biogenic new particle formation, Gordon, H., et al.,  Proc. Natl. Acad. Sci. U.S.A, 113, 43, 12053–12058, 2016  

New particle formation in the free troposphere: a question of chemistry and timing, Bianchi  et al. Science 352, 2016

Ion-induced nucleation of pure biogenic particles, Kirkby et al., Nature 533, 521–526, 2016

The role of low-volatility organic compounds in initial particle growth in the atmosphere, Tröstl et al., Nature 533,527–531, 2016

The effect of acid–base clustering and ions on the growth of atmospheric nano-particles, Lehtipalo et al., Nature Communications 7: 11594, 2016

Unexpectedly acidic nanoparticles formed in dimethylamine–ammonia–sulfuric-acid nucleation experiments at CLOUD, Lawler, J., et al,  Atmos. Chem. Phys., 16 13601-13618, 2016

Aqueous phase oxidation of sulphur dioxide by ozone in cloud droplets  Hoyle, C., et al, Atmos. Chem. Phys., 16, 1693–1712, 2016

Observation of viscosity transition in alpha-pinene secondary organic aerosol
Jarvinen, E., et al.,Atmos. Chem. Phys., 16, 4423–4438, 2016

Hygroscopicity of nanoparticles produced from homogeneous nucleation in the CLOUD experiments, Kim, J., et al., Atmos. Chem. Phys., 16, 293–304, 2016

Phase transition observations and discrimination of small cloud particles by light polarization in expansion chamber experiments, Nichman, L., et al., Atmos. Chem. Phys., 16, 3651-3664, 2016

2015

Elemental composition and clustering of α-pinene oxidation products for different oxidation conditions
A. P. Praplan et al., Atmos. Chem. Phys. Discuss. 14, 30799-308, 2015

Insights into acid-base nucleation experiments by comparison of the chemical composition of positive,negative and neutral clusters, Bianchi et al., Environ Sci Technol. 2014 Dec 2; 48(23):13675-84. (2015)

2014

Neutral molecular cluster formation of sulfuric acid–dimethylamine observed in real time under atmospheric conditions,
Kürten et al.,Proc. Natl. Acad. Sci. U.S.A, 111, 15019 – 24, 2014

On the derivation of particle nucleation rates from experimental formation rates Kürten, A., Williamson, C., Almeida, J., Kirkby, J., Curtius, J., Atmos. Chem. Phys. Discuss. 14, 27233 – 27261, 2014

2013

Molecular understanding of sulphuric acid – amine particle nucleation in the atmosphere, Almeida et al., Nature 502, 359 – 363, 2013