Publications

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Xiong, F., Borca, C. H., Slipchenko, L. V., Shepson, P. B.: Photochemical degradation of isoprene-derived 4,1-nitrooxy enal, Atmos. Chem. Phys., 16, 5595-5610, doi:10.5194/acp-16-5595-2016, 2016. link

Thompson, C. R., P. B. Shepson, J. Liao, L. G. Huey, E. C. Apel, C. A. Cantrell, F. Flocke, J. Orlando, A. Fried, S. R. Hall, R. S. Hornbrook, D. J. Knapp, R. L. Mauldin III, D. D. Montzka, B. C. Sive, K. Ullmann, P. Weibring, A. Weinheimer: Interactions of bromine, chlorine, and iodine photochemistry during ozone depletions in Barrow, Alaska, Atmos. Chem. Phys., 15, 9651-9679, doi:10.5194/acp-15-9651-2015, 2015. link

Lavoie, T. N., P. B. Shepson, M. O. L. Cambaliza, B. H. Stirm, A. Karion, C. Sweeney, T. I. Yacovitch, S. C. Herndon, X. Lan, D. Lyon.: Aircraft-Based Measurements of Point Source Methane Emissions in the Barnett Shale Basin Environmental Science & Technology 49 (13), 7904-7913 doi:10.1021/acs.est.5b00410, 2015. link

Cambaliza, M. O. L, P. B. Shepson, J. Bogner, D. R. Caulton, B. Stirm, C. Sweeney, S. A. Montzka, K. R. Gurney, K. Spokas, O. E. Salmon, T. N. Lavoie, A. Hendricks, K. Mays, J. Turnbull, B. R. Miller, T. Lauvaux, K. Davis, A. Karion, B. Moser, C. Miller, C. Obermeyer, J. Whetstone, K. Prasad, N. Miles, S. Richardson.: Quantification and source apportionment of the methane emission flux from the city of Indianapolis Elementa 3:000037 doi:10.12952/journal.elementa.000037, 2015. link

Gladich, I., J. S. Francisco, R. J. Buszek, M. Vazdar, M. A. Caignano, and P. B. Shepson.: Ab Initio Study of the Reaction of Ozone with Bromide Ion J. Phys. Chem. A 119, 4482-4488 doi:10.1021/jp5101279, 2015. link

Peterson, P. K., W. R. Simpson, K. A. Pratt, P. B. Shepson, U. Frieß, J. Zielcke, U. Platt, S. J. Walsh, and S. V. Nghiem.: Meteorological controls on the vertical distribution of bromine monoxide in the lower troposphere Atmos. Chem. Phys. 15, 2119-2137 doi:10.5194/acp-15-2119-2015, 2015. link

Turnbull, J., C. Sweeney, A. Karion, T. Newberger, S. Lehman, P. Tans, K. J. Davis, T. Lauvaux, N. L. Miles, S. J. Richardson, M. O. Cambaliza, P. B. Shepson, K. Gurney, R. Patarasuk, I. Razlivanov.: Towards quantification and source sector identification 1 of fossil fuel CO2 emissions from an urban area: Results from the INFLUX experiment J. Geophys. Res. 120, 292-312 doi: 10.1002/2014JD022555, 2015. link

Cambaliza, M. O. L, P. B. Shepson, J. Bogner, D. R. Caulton, B. Stirm, C. Sweeney, S. A. Montzka, K. R. Gurney, K. Spokas, O. E. Salmon, T. N. Lavoie, A. Hendricks, K. Mays, J. Turnbull, B. R. Miller, T. Lauvaux, K. Davis, A. Karion, B. Moser, C. Miller, C. Obermeyer, J. Whetstone, K. Prasad, N. Miles, S. Richardson.: Quantification and source apportionment of the methane emission flux from the city of Indianapolis Elem. Sci. Anth. 3: 000037 doi: 10.12952/journal.elementa.000037, 2015. link

Caulton, D. R., Shepson, P. B., Cambaliza, M., McCabe D., Baum, E., Stirm, B.: Methane Destruction Efficiency of Natural Gas Flares Associated with Shale Formation Wells Environmental Science & Technology 48 (16), 9548-9554, doi:10.1021/es500511w, 2014. link

Rindelaub, J. D., K. M. McAvey, P. B. Shepson.: The photochemical production of organic nitrates from α-pinene and loss via acid-dependent particle phase hydrolysis Atmos. Environ. 100, 193-201 doi:10.1016/j.atmosenv.2014.11.010, 2014. link

General, S., D. Pöhler, J. Zielcke, U. Frieß, P. Shepson, B. Stirm, W. Simpson, H. Sihler, K. Weber, C. Fischer, U. Platt.: The Heidelberg Airborne Imaging DOAS Instrument (HAIDI): A Novel Imaging DOAS Device for 2-D and 3-D Imaging of Trace Gases Atmos. Meas. Tech. 7, 3459-3485 doi:10.5194/amt-7-3459-2014, 2014. link

Liao, J., L. G. Huey, Z. Liu, D. J. Tanner, C. A. Cantrell, J. J. Orlando, F. M. Flocke, P. B. Shepson, A. J. Weinheimer, S. R. Hall, H. J. Beine, Y. Wang, E. D. Ingall, C. R. StephensG, R. S. Hornbrook, E. Apel, A. Fried, L. Mauldin, J. N. Smith, R. M. Staebler, J.A. Neuman, J.B. Nowak.: Observations of very high levels of molecular chlorine at Barrow, AK Nature Geoscience 94, 289-291, doi:10.1038/ngeo2046, 2014. link

Halfacre, J. W., Knepp, T. N., Shepson, P. B., Thompson, C. R., Pratt, K. A., Li, B., Peterson, P. K., Walsh, S. J., Simpson, W. R., Matrai, P. A., Bottenheim, J. W., Netcheva, S., Perovich, D. K., and Richter, A.: Temporal and spatial characteristics of ozone depletion events from measurements in the Arctic. Atmos. Chem. Phys. 14, 4875-4894, doi:10.5194/acp-14-4875-2014, 2014. link

Caulton, D. R., P. B. Shepson, R. L. Santoro, J. P. Sparks, R. W. Howarth, A. R. Ingraffea, M. O. L. Cambaliza, C. Sweeney, A. Karion, K. J. Davis, B. H. Stirm, S. A. Montzka, B. R. Miller, Toward a better understanding and quantification of methane emissions from shale gas development. PNAS. 2014. 111 (17) 6237-6242; published ahead of print April 14, 2014, doi:10.1073/pnas.1316546111. link

Pratt, K. A., Fiddler, M. N., Shepson, P. B., Carlton, A.G., Surratt, J. D., Organosulfates in cloud water above the Ozarks' isoprene source region, Atmos. Environ., 77, (2013), 231-238. link

Pratt, K. A., Custard, K. D., Shepson, P. B., Douglas, T. A., Pöhler, D., General, S., Zielcke, J., Simpson, W. R., Platt, U., Tanner, D. J., Huey, G. L., Carlsen, M., and Stirm, B. H., Photochemical production of molecular bromine in Arctic surface snowpacks, Nature Geosci., 6, 351–356, 2013. link

Nghiem, S. V., P. Clemente-Colón, T. Douglas, C. Moore, D. Obrist, D. K. Perovich, K. A. Pratt, I. G. Rigor, W. Simpson, P. B. Shepson, A. Steffen, J. Woods.: Studying Bromine, Ozone, and Mercury Chemistry in the Arctic EoS Trans. doi:10.1002/2013EO330002, 2013. link

Griffith, S., R. Hansen, S. Dusanter, P. S. Stevens, M. Alaghmand, S. Bertman, M. Carroll, M. Erickson, M. Galloway, N. Grossberg, J. Hottle, J. Hou, T. Jobson, A. Kammrath, F. Keutsch, B. Lefer, L. Mielke, A. O’Brien, P. B. Shepson, M. Thurlow, W. Wallace, N. Zhang, X. Zhou, OH and HO2 Radical Chemistry during PROPHET 2008 and CABINEX 2009 – Part 1: Measurements and Model Comparison, Atmos. Chem. Phys. Discuss., 12, 33165-33218, 2012. link

Helmig, D., P. Boylan, B. Johnson, S. Oltmans, C. Fairall, R. Staebler, A. Weinheimer, J. Orlando, D. J. Knapp, D. D. Montzka, F. Flocke, U. Frieß, H. Sihler, and P. B. Shepson, Ozone Dynamics and Snow-Atmosphere Exchanges During Ozone Depletion Events at Barrow, AK, J. Geophys. Res., 117, D20303, doi:10.1029/2012JD017531, 2012. link

J. P. D. Abbatt, J. L. Thomas, K. Abrahamsson, C. Boxe, A. Granfors, A. E. Jones, M. King, A. Saiz-Lopez, P. B. Shepson, J. Sodeau, D. Toohey, C. Toubin, R. von Glasow, S. Wren, and X. Yang, Halogen Activation via Interactions with Environmental Ice and Snow, Atmos. Chem. Phys., 12, 6237-6271, 2012. link

P. B. Shepson, P. A. Ariya, C. Deal, D. J. Donaldson, T. A. Douglas, B. Loose, T. Maksym, P. A. Matrai, Changing polar environments: Interdisciplinary challenges, EoS Transactions, American Geophysical Union Feature Article, 93, No. 11, Page 117, 2012. link

A. M. Bryan, R. Forkel, S. B. Bertman, M. A. Carroll, S. Dusanter, G. D. Edwards, S. Griffith, A. B. Guenther, R. F. Hansen, D. Helmig, T. Jobson, F. N. Keutsch, B. L. Lefer, S. N. Pressley, P. B. Shepson, P. S. Stevens, and A. L. Steiner, In-canopy gas-phase chemistry during the 2009 CABINEX field campaign: Sensitivity to isoprene chemistry and vertical mixing, Atmos. Chem. Phys., 12, 8829-8849, 2012. link

N. Zhang, X. Zhou, S. Bertman, D. Tang, M. Alaghmand, P. B. Shepson, and M. A. Carroll, Measurements of Ambient HONO and Vertical HONO Flux Above a Northern Michigan Forest Canopy, Atmos. Chem. Phys., 12, 8285-8296,2012. link

K. A. Pratt, L. H. Mielke, P. B. Shepson, A. M. Bryan, A. L. Steiner, J. Ortega, R. Daly, D. Helmig, C. S. Vogel, S. Griffith, S. Dusanter, P. S. Stevens, M. Alaghmand, Contributions of individual biogenic volatile organic compounds to organic nitrate formation above a mixed forest, Atmos. Chem. Phys.,12, 10125-10143, 2012. link

J. Liao, L. G. Huey, D. J. Tanner, F. M. Flocke, J. J. Orlando, J. A. Neuman, J. B. Nowak, A. J. Weinheimer, S. R. Hall, J. N. Smith, A. Fried, R. M. Staebler, Y. Wang, J.-H. Koo, C. A. Cantrell, P. Weibring, J. Walega, D. J. Knapp, P. B. Shepson, and C. R. Stephens, Observations of inorganic bromine (HOBr, BrO, and Br2) speciation at Barrow, AK in spring 2009, J. Geophys. Res., 117, D00R16, doi:10.1029/2011JD016641, 2012. link

C. R. Stephens, P. B. Shepson, A. Steffen, J. W. Bottenheim, J. Liao, L. G. Huey, E. Apel, A. Weinheimer, S. V. Nghiem, and S. R. Hall, Observations of the Relative Importance of Chlorine and Bromine Radicals in the Oxidation of Elemental Mercury at Barrow, AK, J. Geophys. Res, 117, D00R11, doi:10.1029/2011JD016649, 2012. link

G. D. Edwards, D. K. Martins, T. K. Starn, K. A. Pratt, and P. B. Shepson, A disjunct eddy accumulation system for the measurement of BVOC fluxes: Lab characterizations and Field deployment, Atmos. Measurement Techniques, 5, 2115-2132, 2012. link

T. Lauvaux, A. E. Schuh, M. Uliasz, S. Richardson, N. Miles, A. E. Andrews, C. Sweeney, L. I. Diaz, D. Martins, P. B. Shepson, and K. J. Davis, Constraining the CO2 budget of the Corn Belt: Exploring Uncertainties from the Assumptions in a Mesoscale Inverse System, Atmos. Chem. Phys., 12, 337-354, 2012. link

M. M. Galloway, J. P. DiGangi, J. R. Hottle, A. J. Huisman, L. H. Mielke, M. Alaghmand, P. B. Shepson, J. Weremijewicz, H. Klavon, F. M. McNeal, M. A. Carroll, S. Griffith, R. F. Hansen, P. S. Stevens, S. B. Bertman, and F. N. Keutsch, Observations and Modeling of Formaldehyde at the PROPHET Mixed Hardwood Forest Site in 2008, Atmos. Environ., 49, (2012), 403-410. link

A. W. Costa, G. Michalski, B. Alexander, and P. B. Shepson, Analysis of Atmospheric Inputs of Nitrate to a Temperate Forest Ecosystem from Δ17O Isotope Ratio Measurements, Geophys. Res. Lett., 38, L15805, doi:10.1029/2011GL047539, 2011. link

M. Alaghmand, P. B. Shepson, T. K. Starn, B. T. Jobson, W. Wallace, M. A. Carroll, S. B. Bertman, B. Lamb, S. Edburg, X. Zhou, E. Apel, D. Riemer, P. Stevens, and F. Keutsch, The Morning NOx Maximum in the Forest Atmosphere Boundary Layer, Atmos. Chem. Phys. Discuss., 11, 29251-29282, 2011. link

I. Gladich, P. B. Shepson, I. Szleifer, M. Carignano, Halide Affinity for the Water-Air Interface in Aqueous Solutions of Mixtures of Sodium Salts, J. Phys. Chem., 115, 5895-5899, 2011. link

Peter S. Kourtev, Kimberly A. Hill, Paul B. Shepson, and Allan Konopka, Atmospheric cloud water contains a diverse bacterial community, Atmos. Environ., 45, (2011), 5399-5405. link

J. Liao, H. Sihler, L. G. Huey, J. A. Neuman, D. J. Tanner, U. Friess, U. Platt, F. M. Flocke, J. J. Orlando, P. B. Shepson, H. J. Beine, A. J. Weinheimer, S. J. Sjostedt, J. B. Nowak, D. J. Knapp, R. M. Staebler, W. Zheng, and R. Sander, A comparison of Arctic BrO measurements by chemical ionization mass spectrometry and long path‐differential optical absorption spectroscopy, J. Geophys. Res., 116, D00R02, doi:10.1029/2010JD014788, 2011. link

X. Zhou, N. Zhang, M. TerAvest, J. Hou, D. Tang, S. Bertman,  M. Alaghmand, P. B. Shepson, M. A. Carroll, S. Griffith, P. Stevens, Nitric Acid Photolysis on the Forest Canopy Surface as a Tropospheric Nitrous Acid Source, DOI: 10.1038, Nature Geosciences, 2011. link

L. H. Mielke, K. A. Pratt, P. B. Shepson, S. A. McLuckey, A. Wisthaler, A.
Hansel
, Quantitative Determination of Biogenic Volatile Organic Compounds in the Atmosphere Using Proton-Transfer Reaction Linear Ion Trap Mass Spectrometry, Anal. Chem., 82, 7952–7957, 2010. link

Slade, J. H., T. M. VanReken, G. R. Mwaniki, S. Bertman, B. Stirm, and P. B. Shepson (2010), Aerosol production from the surface of the Great Lakes, Geophys. Res. Lett., 37, L18807, doi:10.1029/2010GL043852. link

I. Gladich, P. Shepson, I. Szleifer, and M. Carignano, Halide and sodium ion parameters for modeling aqueous solutions in TIP5P-Ew water, Chem. Phys. Lett.,doi:10.1016/j.cplett.2010.02.032, 2010. link

T. N. Knepp, J. Bottenheim, M. Carlsen, D. Carlson, D. Donohoue, G. Friederich, P. A. Matrai, S. Netcheva, D. K. Perovich, R. Santini, P. B. Shepson, W. Simpson, T. Valentic, C. Williams, and P. J. Wyss, Development of an autonomous sea ice tethered buoy for the study of ocean-atmosphere-sea ice-snow pack interactions: the O-buoy, Atmos. Meas. Tech., 3, 249-261, 2010. link

A. L. Lockwood, P. B. Shepson, M. Alaghmand, M. N. Fiddler, Isoprene Nitrates: Separation, Identification, Yields, and Ozone Rate Constants, Atmos. Chem. Phys., 10, 6169–6178, 2010. link

K. Mays, P. Shepson, B. Stirm, A. Karion, C. Sweeney, K. Gurney, Aircraft-Based Measurements of the Carbon Footprint of Indianapolis, Environ. Sci. Technol., 43, 7816–7823, 2009. link

Zhang, N., X. Zhou, P. B. Shepson, H. Gao, M. Alaghmand, and B. Stirm (2009), Aircraft measurement of HONO vertical profiles over a forested region, Geophys. Res. Lett., 36, L15820, doi:10.1029/ 2009GL038999. link

Martins, D. K., Sweeney, C., Stirm B. H., and Shepson P. B., Regional surface flux of CO2 inferred from changes in the advected CO2 column density, Agric. Forest Meteorol. (2009), doi:10.1016/j.agrformet.2009.05.005. link

Travis N. Knepp, Tennie L. Renkins, Paul B. Shepson, Gas phase acetic acid and its qualitative effects on snow crystal morphology and the quasi-liquid layer, Atmospheric Chemistry and Physics., 9, 7679-7690, 2009. link

A.E. Perring, A.Wisthaler, M. Graus, P.J. Wooldridge, A. Lockwood, L. H. Mielke, P.B. Shepson, A. Hansel, and R.C. Cohen, A product study of the Isoprene+NO3 Reaction, Atmos. Chem. Phys., 9, 4945-4956, 2009. link

M. Müller, L. H. Mielke, M. Breitenlechner, S. A. McLuckey, P. B. Shepson, A. Wisthaler, and A. Hansel, MS/MS studies for the selective detection of isomeric biogenic VOCs using a Townsend Discharge Triple Quadrupole Tandem MS and a PTR-Linear Ion Trap MS, Atmos. Meas. Tech., 2, 703-712, 2009. link

L. H. Mielke, D. E. Erickson, S. A. McLuckey, A. Wisthaler, A. Hansel, and P. B. Shepson, Development of a Proton Transfer Reaction Linear Ion Trap Mass Spectrometer (PTRLIT) for Quantification of Atmospheric Volatile Organic Compounds, Anal. Chem., 80, 8171–8177, 2008. link

Lockwood, A. L., T. R. Filley, D. Rhodes, and P. B. Shepson, Foliar uptake of atmospheric organic nitrates, Geophys. Res. Lett., 35, L15809, doi:10.1029/2008GL034714, 2008. link

K. E. Garman, P. Wyss, M. Carlsen, J. R. Zimmerman, B. H. Stirm, T. Q. Carney, R. Santini, and P. B. Shepson, The contribution of variability of lift-induced upwash to the uncertainty in vertical winds determined from an aircraft platform, Boundary Layer Meteor., 126, 461-476, 2008. link

A. Cavender, T. Biesenthal, J. W. Bottenheim, and P. B. Shepson, Volatile Organic Compound Ratios as Probes of Halogen Atom Chemistry in the Arctic, Atmos. Chem. Phys., 8, 1737–1750, 2008. link

William R. Simpson, Roland von Glasow, Katja Riedel, Phil Anderson, Parisa
Ariya, Jan Bottenheim, John Burrows, Lucy Carpenter, Udo Frieß, Michael Goodsite, Dwayne Heard, Manuel Hutterli, Hans-Werner Jacobi, Lars Kaleschke, Bill Neff, John Plane, Ulrich Platt, Andreas Richter, Howard Roscoe, Rolf Sander, Paul Shepson, John Sodeau, Alexandra Steffen, Thomas Wagner, and Eric Wolff, Halogens and their role in polar boundary-layer ozone depletion, Atmos. Chem. Phys., 7, 4375–4418, 2007. link

S. Morin, J. Savarino, S. Bekki, A. Cavender, P. B. Shepson, and J. W.
Bottenheim
, Major influence of BrO on the NOx budget in the Arctic spring, inferred from ∆17O(NO3-) measurements during Ozone Depletion Events, Environ. Chem., 4, 238-241, 2007. link

A.M. Grannas, A.E. Jones, J. Dibb, M. Ammann, C. Anastasio, H.J. Beine, M. Bergin, J. Bottenheim, C.S. Boxe, G. Carver, G. Chen, J.H. Crawford, F. Dominé, M.M. Frey, M.I. Guzmán, D.E. Heard, D. Helmig, M.R. Hoffmann, R.E. Honrath, L.G. Huey, M. Hutterli, H. W. Jacobi, P. Klán, J. McConnell, J. Plane, R. Sander, J. Savarino, P.B. Shepson, W.R. Simpson, J.R. Sodeau, R. von Glasow, R. Weller, E.W. Wolff, T. Zhu, An overview of snow photochemistry: Evidence, mechanisms and impacts, Atmos. Chem. Phys., 7, 4329–4373, 2007. link

M. A. Carignano, P. B. Shepson, and I. Szleifer, Ions at the ice/water/vapor interface, Chem. Phys. Lett., 436, 99–103, 2007. link

Hill, K. A., P. B. Shepson, E. S. Galbavy, C. Anastasio, P. S. Kourtev, A. Konopka, and B. H. Stirm (2007), Processing of atmospheric nitrogen by clouds above a forest environment, J. Geophys. Res., 112, D11301, doi:10.1029/2006JD008002. link

P. J. Tackett, A Cavender, A. D. Keil, P. B. Shepson, J. W. Bottenheim, S. Morin, J. Deary, A. Steffen, and C. Doerge, A Study of the vertical scale of halogen chemistry in the Arctic troposphere during polar sunrise at Barrow, AK, J. Geophys. Res., 112, D07306, doi:10.1029/2006JD007785, 2007. link

G. D. Edwards, P. B. Shepson, J. W. Grossenbacher, J. M. Wells, G. E. Patterson, D. J. Barket, Jr., S. Pressley, T. Karl, and E. Apel, Development of an Automated Cylindrical Ion Trap Mass Spectrometer for Determination of Atmospheric Volatile Organic Compounds, Anal. Chem.,79, 5040-5050, 2007. link

M. A. Carignano, E. Baskaran, P. B. Shepson, and I. Szleifer, Molecular Dynamics Simulation of Ice Growth from Supercooled Pure Water and Salt Solution, Annals Glaciol., 44, 113-117, 2006. link

A. Keil and P. B. Shepson, Chlorine and Bromine atom ratios in the Springtime Arctic troposphere as determined from measurement of halogenated VOCs, J. Geophys. Res., 111, D17303, doi:10.1029/2006JD007119, 2006. link

K.E. Garman, K.A. Hill, P. Wyss, M. Carlsen, J.R. Zimmerman, B.H. Stirm, T.Q. Carney, R. Santini, and P.B. Shepson, An Airborne and Wind Tunnel Evaluation of a Wind Turbulence Measurement System for Aircraft-based Flux Measurements, J. Ocean and Atmos. Technol., 23,  1696-1708, 2006. link

M. A. Carignano, P. B. Shepson, and I. Szleifer, Molecular Dynamics Simulations of Ice Growth from Supercooled Water, Molec. Phys., 103, 2957-2967, 2005. link

E. A. Holland, S. B. Bertman, M. A. Carroll, A. B. Guenther, P. B.Shepson, J. P. Sparks, J. Lee-Taylor, US Nitrogen Science Plan Focuses Collaborative Efforts, EOS Transactions, 86, 253-256, 2005. link

K. A. Hill, P. B. Shepson, E. S. Galbavy, and C. Anastasio, Measurement of Wet Deposition of Inorganic and Organic Nitrogen in a Forest Environment, J. Geophys. Res. - Biogeosciences, , 110, doi:10.1029/2005JG000030, 2005. link

P. Giacopelli, K. Ford, and P. B. Shepson, A Comparison of Measured and Simulated Isoprene Nitrates Above a Forest Canopy, J. Geophys. Res., 110, D01304, doi: 10.1029/2004JD005123, 2005. link

C. Espada and P. B. Shepson, The Production of Organic Nitrates from Atmospheric Oxidation of Ethers and Glycol Ethers, Int. J. Chem. Kinet, 37, 686-699, 2005. link

C. Espada, J. Grossenbacher, K. Ford, T. Couch, and P. B. Shepson, The Production of Organic Nitrates from Various Anthropogenic Volatile Organic Compounds, Int. J. Chem. Kinet, 37, 675-685, 2005. link

A. Keil and P. B. Shepson, Development of a Chemical Ionization Ion Trap Mass Spectrometric Method for Trace Level Determination of Molecular Halogens, Anal. Chem., 10.1021/ac04993m, 2004. link

P. DiCarlo, W. H. Brune, M. Martinez, H. Harder, R. Lescher, X. Ren, T. Thornberry, M. A. Carroll, V. Young, P. B. Shepson, D. Riemer, and E. Apel, Missing OH Reactivity in a Forest: Evidence for Unknown Reactive Biogenic VOCs, Science, 304, 722-725, 2004. link

T. M. Dassau, P. B. Shepson, K. M. Ford, and J. W. Bottenheim, Peroxyacetyl Nitrate Photochemistry and Interactions with the Arctic Surface, J. Geophys. Res., 109, D18302, doi:10.1029/2004JD004562, 2004. link

A. M. Grannas, P. B. Shepson, and T. R. Filley, Photochemistry and nature of organic matter in Arctic and Antarctic snow, Global Biogeochem. Cycles, 18, 10.1029/2003GB002133, 2004. link

J. W. Grossenbacher, D. J. Barket, P. B. Shepson, M. A. Carroll, K. G. Olszyna, and E. Apel, A Comparison of Isoprene Nitrate Concentrations at two Forest-Impacted Sites, J. Geophys. Res., 109, D11311, doi:10.1029/2003JD003966, 2004. link

D. J. Barket, J. M. Hurst, J. W. Grossenbacher, P. B. Shepson, W. Brune, T. Thornberry, M. A. Carroll, T. Biesenthal, J. W. Bottenheim, and K. G. Olszyna, A Study of the NOx Dependence of Isoprene Oxidation, J. Geophys. Res., 109, D11310, doi:10.1029/2003JD003965, 2004. link

J. M. Hurst Bowman, D. J. Barket, and P. B. Shepson, The atmospheric chemistry of nonanal,  Environ. Sci. Technol., 37, 2218-2225, 2003. link

P. Shepson, P. Matrai, L. Barrie, and J. Bottenheim, Ocean-Atmosphere-Sea Ice-Snowpack Interactions in the Arctic, and Global Change, EOS Transactions¸84, 349, 2003. link

F. Dominé and P. B. Shepson, Air-snow interactions and their impact on atmospheric chemistry, Science, 297, 1506-1510, 2002. link

J. W. Bottenheim, J. E. Dibb, R. E. Honrath, and P. B. Shepson, An Introduction to the ALERT2000 and Summit2000 Arctic Research Studies, Atmos. Environ.,36, 2467-2469, 2002. link

T. M. Dassau, A. L. Sumner, S. L. Koeniger, P. B. Shepson, N. Cullen, K. Steffen, H.-W. Jacobi,  and R. Bales, Investigation of the Role of the Snowpack on Formaldehyde Chemistry at Summit, Greenland, J. Geophys. Res., Vol. 107, NO. D19, 4394, doi:10.1029/2002JD002182, 2002. link

S. Perrier, S. Houdier, F. Domine, A. Cabanes, L. Legagneax, A. L. Sumner, and P. B. Shepson, Formaldehyde in Arctic Snow. Incorporation into Ice Particles and Evolution in the Snowpack, Atmos. Environ., 36, 2695-2705, 2002. link

M. R. Albert, A. M. Grannas, J. W. Bottenheim, and P. B. Shepson, Processes and Properties of Snow-Air Transfer in the High Arctic with Application to Interstitial Ozone at Alert, Canada, Atmos. Environ., 36, 2779-2787, 2002. link

C. W. Spicer, R. A. Plastridge, K. L. Foster, B. J. Finlayson-Pitts, J. W. Bottenheim, A. M. Grannas, and P. B. Shepson, Molecular Halogens Before and During Ozone Depletion Events in the Arctic at Polar Sunrise:  Concentrations and Sources, Atmos. Environ., 36, 2721-2731, 2002. link

Yang, J., R. E. Honrath, M. C. Peterson, J. E. Dibb, A. L. Sumner, P. B. Shepson, M. Frey, H.-W. Jacobi, A. Swanson, and N. Blake, Impacts of snowpack emissions on deduced levels of OH and peroxy radicals at Summit, Greenland, Atmos. Environ.,36, 2523-2534, 2002. link

H. Boudries, J.W. Bottenheim, C. Guimbaud, A. Grannas, P. B. Shepson, S. Houdier, S. Perrier, and F. Dominé, Distribution and Trends of Oxygenated Hydrocarbons in the High Arctic: Measurement in the Atmospheric Boundary Layer and Interstitial Snow Air During Polar Sunrise Experiment, Alert 2000, Atmos. Environ.,36, 2573-2583, 2002. link

Houdier, S., S. Perrier, F. Domine, A. Grannas, C. Guimbaud, P. B. Shepson, H. Boudries, and J. W. Bottenheim, Acetaldehyde and Acetone in the Snowpack near Alert During the ALERT2000 Campaign.  Snowpack Composition, Incorporation Processes, and Atmospheric Impact, Atmos. Environ., 36, 2609-2618, 2002. link

Sumner, A. L., P. B. Shepson, A. M. Grannas, J. W. Bottenheim, K. G. Anlauf, D. Worthy, F. Domine, and S. Houdier, Atmospheric Chemistry of Formaldehyde in the Arctic Troposphere at Polar Sunrise, and the Influence of the Snowpack, Atmos. Environ., 36, 2553-2562, 2002. link

A. M. Grannas, P. B. Shepson, C. Guimbaud, F. Domine, M. Albert, W. Simpson, J. W. Bottenheim, and H. Boudries, A Study of photochemical and physical processes affecting carbonyl compounds in the Arctic Marine Boundary Layer, Atmos. Environ., 36, 2733-2742, 2002. link

C. Guimbaud, A. M. Grannas, P. B. Shepson, J. D. Feuntes, H. Boudries, J. W. Bottenheim, F. Dominé, S. Houdier, S. Perrier, T. B. Bisenthal, and B. G. Splawn, Snowpack processing of acetaldehyde and acetone in the Arctic atmospheric boundary layer, Atmos. Environ., 36, 2743-2752, 2002. link

H. M. Cho, P. B. Shepson, L. A. Barrie, J. A. Cowin, and R. Zaveri, NMR investigation of the Quasi-Brine layer in ice/brine mixtures, J. Phys. Chem. B, 10.1021jp020449, November, 2002. link

K. Ford, B. Campbell, P. B. Shepson, S. B. Bertman, R. E. Honrath, M. Peterson, and J. E. Dibb, Studies of Peroxyacetyl nitrate (PAN) and its interaction with the Snowpack at Summit, Greenland, J. Geophys. Res., 107, 10.1029/2001JD000547, 2002. link

S. Sillman, M. A. Carroll, T. Thornberry, B. K. Lamb, H. Westberg, W. K. Brune, I. Faloona, D. Tan, J. M. Hurst, P. B. Shepson, A. L. Sumner, D. R. Hastie, C. M. Mihele, E. C. Apel, and D. D. Riemer, Loss of Isoprene and Sources of Nighttime OH Radicals at a Rural Site in the U.S.: Results from Photochemical Models, J. Geophys. Res., 107, (D5), 10.1029/2001JD000449, 2002. link

M. A. Carroll, P. B. Shepson, and S. B. Bertman, Overview of the Program for Research on Oxidants: PHotochemistry, Emissions, and Transport (PROPHET) Summer 1998 Measurements Intensive, J. Geophys. Res., 106, 24275-24288, 2001. link

X. Zhou, H. J. Beine, R. E. Honrath, J. D. Fuentes, W. Simpson, P. B. Shepson, and J. Bottenheim, Snowpack Photochemical Production of HONO: a Major Source of OH in the Arctic Boundary Layer in Spring Time, Geophys. Res. Lett., 28, 4087-4090, 2001. link

T. Thornberry, M. A. Carroll, G. J. Keeler, S. Sillman, S. B. Bertman, M. R. Pippin, K. Ostling, J. W. Grossenbacher, P. B. Shepson, O. R. Cooper, J. L. Moody, and W. R. Stockwell, Observations of reactive oxidized nitrogen and speciation of NOy during the PROPHET summer 1998 intensive, J. Geophys. Res., 106, 24359-24368, 2001. link

K. Foster, R. Plastridge, J. Bottenheim, P. Shepson, B. Finlayson-Pitts and C. W. Spicer, The Role of Br2 and BrCl in Surface Ozone Destruction at Polar Sunrise, Science, 291, 471-474, 2001. link

H. Westberg, B. Lamb, R. Hafer, A. Hills, P. B. Shepson, and C. Vogel, Measurement of Isoprene Fluxes at the PROPHET site, J. Geophys. Res., 106, 24347-24358, 2001. link

A. L. Sumner, T. L. Couch, P. B. Shepson, T. Thornberry, M. A. Carroll, S. Sillman, S. B. Bertman, I. Faloona, D. Tan, W. Brune, O. Cooper, J. Moody, W. Stockwell, and V. Young, A Study of the Formaldehyde Budget above a Forest Canopy, J. Geophys. Res., 106, 24387-24405, 2001. link

D. Tan, I. Faloona, W. Brune, P. B. Shepson, T. L. Couch, A. L. Sumner, T. Thornberry, M. A. Carroll, E. Apel, D. Riemer, W. Stockwell, HOx Budgets in a Deciduous Forest: Results from the PROPHET Summer 1998 Campaign, J. Geophys. Res., 106, 24407-24427, 2001. link

I. Faloona, D. Tan, W. Brune, J. Hurst, D. Barket, T. Couch, P. Shepson, E. Apel, D. Riemer, T. Thornberry, M. A. Carroll, S. Sillman, and S. Bertman, Nighttime Observations of Anomalously high levels of Hydroxyl Radical above a Deciduous Forest, J. Geophys. Res., 106, 24315-24333, 2001. link

D. J. Barket, J. M. Hurst, T. L. Couch, P. B. Shepson, R. Haefer, B. Lamb, H. Westberg, D. Riemer, E. Apel, C. Farmer, E. Stabenau, and Rod Zika, Intercomparison of Automated Methodologies for Measurement of Ambient Isoprene During the PROPHET 1998 Summer Campaign, J. Geophys. Res., 106, 24301-24313, 2001. link

J. W. Grossenbacher, P. B. Shepson, T. Thornberry, M. Witmer-Rich, M. A. Carroll, I. Faloona, D. Tan, W. Brune, E. Apel, D. Riemer, and H. A. Westberg, Measurements of Isoprene Nitrates Above a Forest Canopy, J. Geophys. Res., 106, 24429-24438, 2001. link

J. M. Hurst, D. J. Barket, O. Herrera-Gomez, T. L. Couch, P. B. Shepson, I. Faloona, D. Tan, W. Brune, H. Westberg, B. Lamb, T. Biesenthal, V. Young, A. H. Goldstein, J. W. Munger, and M. A. Carroll, Investigation of the Nighttime Decay of Isoprene, J. Geophys. Res.,106, 24335-24346, 2001. link

T. L. Couch, A. L. Sumner, T. M. Dassau, P. B. Shepson, and R. E. Honrath, An Investigation of the Interaction of Carbonyl Compounds with the Snowpack, Geophys. Res. Lett., 27, 2241-2244, 2000. link

B. Michalowski, J. S. Francisco, Y. Li, S.-M. Li, and P. B. Shepson, A Computer Model Study of Multiphase Chemistry in the Arctic Boundary Layer During Polar Sunrise, J. Geophys. Res., 105, 15131-15145, 2000. link

R. E. Honrath, M. C. Peterson, S. Guo, J. E. Dibb, P. B. Shepson, and B.
Campbell
, Evidence of NOx Production Within or Upon the ice particles in the Greenland snowpack, Geophys. Res. Lett., 26, 695-698, 1999. link

A. L. Sumner and P. B. Shepson, Snowpack Production of Formaldehyde and its Effect on the Arctic Troposphere, Nature, 398, 230-233, 1999. link

G. A. Impey, C. M. Mihele, P. B. Shepson, D. R. Hastie, K. G. Anlauf, and L. A. Barrie, Measurements of Photolyzable Halogen Compounds and Bromine Radicals During the Polar Sunrise Experiment 1997, J. Atmos. Chem., 34, 21-37, 1999. link

D. R. Hastie, J. Narayan, C. Schiller, H. Niki, P. B. Shepson, D. Sills, P. Taylor, W. J. Moroz, J. Drummond, N. Reid, R. Taylor, P. B. Roussel, and O. T. Melo, Observational evidence for the impact of the lake breeze circulation on ozone concentrations in Southern Ontario, Atmos. Environ., 33, 323-335, 1999. link

J. M. O'Brien, E. Czuba, D. R. Hastie, J. S. Francisco, and P. B. Shepson, Determination of the Hydroxy Nitrate Yields from the Reaction of C2-C6 Alkenes with OH in the Presence of NO, J. Phys. Chem., 102, 8903-8908, 1998. link

D. Riemer, W. Pos, P. Milne, C. Farmer, R. Zika, E. Apel, K. Olszyna, T. Kliendienst, S. Bertman, P. Shepson, and T. Starn, Observations of Nonmethane Hydrocarbons (NMHCs) and Oxygenated Volatile Organic Compounds (OVOCs) at a Rural Site in the Southeastern United States, J. Geophys. Res., 103, 28111-28128, 1998. link

A. Colorado, D. J. Barket, J. M. Hurst, and P. B. Shepson, A Fast-Response Method for Determination of Atmospheric Isoprene Using Quadrupole Ion Trap Mass Spectrometry, Anal. Chem., 70, 5129-5135, 1998. link

O. R. Cooper, J. L. Moody, J. C. Davenport, S. J. Oltmans, B. J. Johnson, P. B. Shepson, X. Chen, and J. T. Merrill, The Influence of Springtime Weather Systems on Vertical Ozone Distributions over Three North American Sites, J. Geophys. Res., 103, 22001-22013, 1998. link

T.A. aBiesenthal, J.W. Bottenheim, P.B. Shepson, S.-M. Li, and P. C. Brickell, The chemistry of biogenic hydrocarbons at a Rural Site in Eastern Canada, J. Geophys. Res., 103, 25487-25498, 1998. link

Xiaohui Chen, David Hulbert, and Paul B. Shepson, Measurement of the Organic Nitrate Yield from OH Reaction with Isoprene, J. Geophys. Res., 103, 25563-25568, 1998. link

G. Nouaime, S. B. Bertman, C. Seaver, D. Elyea, H. Huang, P. B. Shepson, T. K. Starn, D. D. Riemer, R. G. Zika, and K. Olszyna, Sequential Tropospheric Products from Isoprene Chemistry: MACR and MPAN at a NOx-rich Forest Environment in the Southeast U.S., J. Geophys. Res., 103, 22463-22471, 1998. link

E. Apel, J. Calvert, D. Riemer, W. Pos, R. Zika, T. Kleindienst, W. Lonneman, K. Fung, E. Fujita, P. B. Shepson, and T. K. Starn, Measurements Comparison of Oxygenated Volatile Organic Compounds at a Rural Site During the 1995 SOS Nashville Intensive, J. Geophys. Res., 103, 22295-22316, 1998. link

N. Srinivasan, R. G. Cooks, and P. B. Shepson, Proton Affinity of Peroxyacetyl Nitrate Sampled by Membrane Introduction Mass Spectrometry, Rapid Comm. Mass Spectrom., 12, 328-334, 1998. link

T. K. Starn, P. B. Shepson, S. B. Bertman, J. S. White, B. G. Splawn, D. Riemer, R. Zika, and K. Olszyna, Observations of isoprene chemistry and its role in ozone production at a semirural site during the 1995 Southern Oxidants Study, J. Geophys. Res., 103, 22425-22435, 1998. link

T.K. Starn, P. B. Shepson, S. B. Bertman, D. D. Riemer, R. Zika, and K. Olszyna,
Nighttime isoprene chemistry at an urban-impacted forest site, J. Geophys. Res., 103, 22437-22447, 1998. link

T. Biesenthal, Q. Wu, P. B. Shepson, H. A. Wiebe, K. G. Anlauf, and G. I. Mackay, A Study of Relationships Between Isoprene, its Oxidation Products and Ozone, in the Lower Fraser Valley, B.C., Atmos. Environ., 31, 2049-2058, 1997. link

J. M. O'Brien, P. B. Shepson, T. Biesenthal, Q. Wu, J. W. Bottenheim, H. A. Wiebe, K. G. Anlauf and P. Brickell, Production and Distribution of Organic Nitrates, and Their Relationship to Carbonyl Compounds in the Lower Fraser Valley, B.C., Atmos. Environ.,31, 2059‑2069  (1997). link

P. B. Shepson, E. Mackay, and K. Muthuramu, Henry’s Law Constants and Removal Processes for Several Atmospheric b-Hydroxy Alkyl Nitrates, Environ. Sci. Technol., 30, 3618-3623, 1996. link