Active molecular iodine photochemistry in the Arctic
Abstract
During springtime, the Arctic atmospheric boundary layer undergoes frequent rapid depletions in ozone and gaseous elemental mercury due to reactions with halogen atoms, influencing atmospheric composition and pollutant fate. Although bromine chemistry has been shown to initiate ozone depletion events, and it has long been hypothesized that iodine chemistry may contribute, no previous measurements of molecular iodine (I2) have been reported in the Arctic. Iodine chemistry also contributes to atmospheric new particle formation and therefore cloud properties and radiative forcing. Here we present Arctic atmospheric I2 and snowpack iodide (I-) measurements, which were conducted near Utqiagvik, AK, in February 2014. Using chemical ionization mass spectrometry, I2 was observed in the atmosphere at mole ratios of 0.3–1.0 ppt, and in the snowpack interstitial air at mole ratios up to 22 ppt under natural sunlit conditions and up to 35 ppt when the snowpack surface was artificially irradiated, suggesting a photochemical production mechanism. Further, snow meltwater I-measurements showed enrichments of up to ~1,900 times above the seawater ratio of I-/Na+, consistent with iodine activation and recycling. Modeling shows that observed I2 levels are able to significantly increase ozone depletion rates, while also producing iodine monoxide (IO) at levels recently observed in themore »
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Purdue Univ., West Lafayette, IN (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1406742
- Report Number(s):
- PNNL-SA-129703
Journal ID: ISSN 0027-8424; 49331; KP1704020
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 38; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; Environmental Molecular Sciences Laboratory; atmosphere; iodine; cryosphere; snowpack; photochemistry
Citation Formats
Raso, Angela R. W., Custard, Kyle D., May, Nathaniel W., Tanner, David, Newburn, Matt K., Walker, Lawrence, Moore, Ronald J., Huey, L. G., Alexander, Liz, Shepson, Paul B., and Pratt, Kerri A. Active molecular iodine photochemistry in the Arctic. United States: N. p., 2017.
Web. doi:10.1073/pnas.1702803114.
Raso, Angela R. W., Custard, Kyle D., May, Nathaniel W., Tanner, David, Newburn, Matt K., Walker, Lawrence, Moore, Ronald J., Huey, L. G., Alexander, Liz, Shepson, Paul B., & Pratt, Kerri A. Active molecular iodine photochemistry in the Arctic. United States. https://doi.org/10.1073/pnas.1702803114
Raso, Angela R. W., Custard, Kyle D., May, Nathaniel W., Tanner, David, Newburn, Matt K., Walker, Lawrence, Moore, Ronald J., Huey, L. G., Alexander, Liz, Shepson, Paul B., and Pratt, Kerri A. Tue .
"Active molecular iodine photochemistry in the Arctic". United States. https://doi.org/10.1073/pnas.1702803114. https://www.osti.gov/servlets/purl/1406742.
@article{osti_1406742,
title = {Active molecular iodine photochemistry in the Arctic},
author = {Raso, Angela R. W. and Custard, Kyle D. and May, Nathaniel W. and Tanner, David and Newburn, Matt K. and Walker, Lawrence and Moore, Ronald J. and Huey, L. G. and Alexander, Liz and Shepson, Paul B. and Pratt, Kerri A.},
abstractNote = {During springtime, the Arctic atmospheric boundary layer undergoes frequent rapid depletions in ozone and gaseous elemental mercury due to reactions with halogen atoms, influencing atmospheric composition and pollutant fate. Although bromine chemistry has been shown to initiate ozone depletion events, and it has long been hypothesized that iodine chemistry may contribute, no previous measurements of molecular iodine (I2) have been reported in the Arctic. Iodine chemistry also contributes to atmospheric new particle formation and therefore cloud properties and radiative forcing. Here we present Arctic atmospheric I2 and snowpack iodide (I-) measurements, which were conducted near Utqiagvik, AK, in February 2014. Using chemical ionization mass spectrometry, I2 was observed in the atmosphere at mole ratios of 0.3–1.0 ppt, and in the snowpack interstitial air at mole ratios up to 22 ppt under natural sunlit conditions and up to 35 ppt when the snowpack surface was artificially irradiated, suggesting a photochemical production mechanism. Further, snow meltwater I-measurements showed enrichments of up to ~1,900 times above the seawater ratio of I-/Na+, consistent with iodine activation and recycling. Modeling shows that observed I2 levels are able to significantly increase ozone depletion rates, while also producing iodine monoxide (IO) at levels recently observed in the Arctic. Furthermore, these results emphasize the significance of iodine chemistry and the role of snowpack photochemistry in Arctic atmospheric composition, and imply that I2 is likely a dominant source of iodine atoms in the Arctic.},
doi = {10.1073/pnas.1702803114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 38,
volume = 114,
place = {United States},
year = {Tue Sep 05 00:00:00 EDT 2017},
month = {Tue Sep 05 00:00:00 EDT 2017}
}
Web of Science
Works referenced in this record:
Surface ozone measurements in clean air
journal, January 1981
- Oltmans, Samuel J.
- Journal of Geophysical Research, Vol. 86, Issue C2
Iodine monoxide in the Antarctic snowpack
journal, January 2010
- Frieß, U.; Deutschmann, T.; Gilfedder, B. S.
- Atmospheric Chemistry and Physics, Vol. 10, Issue 5
Halogens and their role in polar boundary-layer ozone depletion
journal, January 2007
- Simpson, W. R.; von Glasow, R.; Riedel, K.
- Atmospheric Chemistry and Physics, Vol. 7, Issue 16
Photochemical chlorine and bromine activation from artificial saline snow
journal, January 2013
- Wren, S. N.; Donaldson, D. J.; Abbatt, J. P. D.
- Atmospheric Chemistry and Physics, Vol. 13, Issue 19
Boundary Layer Halogens in Coastal Antarctica
journal, July 2007
- Saiz-Lopez, A.; Mahajan, A. S.; Salmon, R. A.
- Science, Vol. 317, Issue 5836
Chlorine, Bromine AND Iodine in arctic aerosols
journal, January 1988
- Sturges, W. T.; Barrie, L. A.
- Atmospheric Environment (1967), Vol. 22, Issue 6
Kinetics and Products of the IO + BrO Reaction
journal, August 2001
- Rowley, David M.; Bloss, William J.; Cox, R. Anthony
- The Journal of Physical Chemistry A, Vol. 105, Issue 33
First observations of iodine oxide from space
journal, January 2007
- Saiz-Lopez, Alfonso; Chance, Kelly; Liu, Xiong
- Geophysical Research Letters, Vol. 34, Issue 12
Production of Molecular Iodine and Tri-iodide in the Frozen Solution of Iodide: Implication for Polar Atmosphere
journal, January 2016
- Kim, Kitae; Yabushita, Akihiro; Okumura, Masanori
- Environmental Science & Technology, Vol. 50, Issue 3
Photolysis of frozen iodate salts as a source of active iodine in the polar
environment
journal, January 2016
- Gálvez, Óscar; Baeza-Romero, M. Teresa; Sanz, Mikel
- Atmospheric Chemistry and Physics, Vol. 16, Issue 19
Molecular-scale evidence of aerosol particle formation via sequential addition of HIO3
journal, August 2016
- Sipilä, Mikko; Sarnela, Nina; Jokinen, Tuija
- Nature, Vol. 537, Issue 7621
Formation of Gas-Phase Bromine from Interaction of Ozone with Frozen and Liquid NaCl/NaBr Solutions: Quantitative Separation of Surficial Chemistry from Bulk-Phase Reaction
journal, March 2011
- Oldridge, N. W.; Abbatt, J. P. D.
- The Journal of Physical Chemistry A, Vol. 115, Issue 12
Compilation of Henry's law constants (version 4.0) for water as solvent
journal, January 2015
- Sander, R.
- Atmospheric Chemistry and Physics, Vol. 15, Issue 8
Photochemical production of molecular bromine in Arctic surface snowpacks
journal, April 2013
- Pratt, Kerri A.; Custard, Kyle D.; Shepson, Paul B.
- Nature Geoscience, Vol. 6, Issue 5
Release of gas-phase halogens from sodium halide substrates: heterogeneous oxidation of frozen solutions and desiccated salts by hydroxyl radicals
journal, October 2008
- Sjostedt, S. J.; Abbatt, J. P. D.
- Environmental Research Letters, Vol. 3, Issue 4
Hydroxyl radical and NO x production rates, black carbon concentrations and light-absorbing impurities in snow from field measurements of light penetration and nadir reflectivity of onshore and offshore coastal Alaskan snow : ALASKAN SNOW OPTICS AND PHOTOCHEMISTRY
journal, March 2012
- France, J. L.; Reay, H. J.; King, M. D.
- Journal of Geophysical Research: Atmospheres, Vol. 117, Issue D14
Direct evidence for coastal iodine particles from Laminaria macroalgae – linkage to emissions of molecular iodine
journal, January 2004
- McFiggans, G.; Coe, H.; Burgess, R.
- Atmospheric Chemistry and Physics, Vol. 4, Issue 3
Iodine observed in new particle formation events in the Arctic atmosphere during ACCACIA
journal, January 2014
- Allan, J. D.; Williams, P. I.; Najera, J.
- Atmospheric Chemistry and Physics Discussions, Vol. 14, Issue 21
Interactions of bromine, chlorine, and iodine photochemistry during ozone depletions in Barrow, Alaska
journal, January 2015
- Thompson, C. R.; Shepson, P. B.; Liao, J.
- Atmospheric Chemistry and Physics, Vol. 15, Issue 16
Bromine measurements in ozone depleted air over the Arctic Ocean
journal, January 2010
- Neuman, J. A.; Nowak, J. B.; Huey, L. G.
- Atmospheric Chemistry and Physics, Vol. 10, Issue 14
Potential influence of iodine-containing compounds on the chemistry of the troposphere in the polar spring. I. Ozone depletion
journal, September 2004
- Calvert, Jack G.; Lindberg, Steve E.
- Atmospheric Environment, Vol. 38, Issue 30
Kinetics and Product Yields in the Heterogeneous Reactions of HOBr with Ice Surfaces Containing NaBr and NaCl
journal, May 2002
- Huff, Amy K.; Abbatt, Jonathan P. D.
- The Journal of Physical Chemistry A, Vol. 106, Issue 21
Can We Model Snow Photochemistry? Problems with the Current Approaches
journal, May 2013
- Domine, Florent; Bock, Josué; Voisin, Didier
- The Journal of Physical Chemistry A, Vol. 117, Issue 23
Dynamics of ozone and nitrogen oxides at Summit, Greenland: I. Multi-year observations in the snowpack
journal, December 2015
- Van Dam, Brie; Helmig, Detlev; Toro, Claudia
- Atmospheric Environment, Vol. 123
Air–snowpack exchange of bromine, ozone and mercury in the springtime Arctic simulated by the 1-D model PHANTAS – Part 1: In-snow bromine activation and its impact on ozone
journal, January 2014
- Toyota, K.; McConnell, J. C.; Staebler, R. M.
- Atmospheric Chemistry and Physics, Vol. 14, Issue 8
Temporal and spatial characteristics of ozone depletion events from measurements in the Arctic
journal, January 2014
- Halfacre, J. W.; Knepp, T. N.; Shepson, P. B.
- Atmospheric Chemistry and Physics, Vol. 14, Issue 10
Estimating the climate significance of halogen-driven ozone loss in the tropical marine troposphere
journal, January 2012
- Saiz-Lopez, A.; Lamarque, J. -F.; Kinnison, D. E.
- Atmospheric Chemistry and Physics, Vol. 12, Issue 9
Heterogeneous chemistry and tropospheric ozone
journal, January 2000
- Jacob, D.
- Atmospheric Environment, Vol. 34, Issue 12-14
Tropospheric Halogen Chemistry: Sources, Cycling, and Impacts
journal, February 2015
- Simpson, William R.; Brown, Steven S.; Saiz-Lopez, Alfonso
- Chemical Reviews, Vol. 115, Issue 10
Observations of inorganic bromine (HOBr, BrO, and Br 2 ) speciation at Barrow, Alaska, in spring 2009 : INORGANIC BROMINE SPECIATION AT BARROW
journal, March 2012
- Liao, J.; Huey, L. G.; Tanner, D. J.
- Journal of Geophysical Research: Atmospheres, Vol. 117, Issue D14
Non-metal redox kinetics: iodine monobromide reaction with iodide ion and the hydrolysis of IBr
journal, December 1991
- Troy, Robert C.; Kelley, Mark D.; Nagy, Julius C.
- Inorganic Chemistry, Vol. 30, Issue 25
Constraints on Arctic Atmospheric Chlorine Production through Measurements and Simulations of Cl 2 and ClO
journal, October 2016
- Custard, Kyle D.; Pratt, Kerri A.; Wang, Siyuan
- Environmental Science & Technology, Vol. 50, Issue 22
Production and Release of Molecular Bromine and Chlorine from the Arctic Coastal Snowpack
journal, April 2017
- Custard, K. D.; Raso, A. R. W.; Shepson, P. B.
- ACS Earth and Space Chemistry, Vol. 1, Issue 3
Uncertainties in gas-phase atmospheric iodine chemistry
journal, September 2012
- Sommariva, R.; Bloss, W. J.; von Glasow, R.
- Atmospheric Environment, Vol. 57
Anthropogenic aerosols and gases in the lower troposphere at Alert Canada in April 1986
journal, July 1989
- Barrie, L. A.; den Hartog, G.; Bottenheim, J. W.
- Journal of Atmospheric Chemistry, Vol. 9, Issue 1-3
Ozone destruction and photochemical reactions at polar sunrise in the lower Arctic atmosphere
journal, July 1988
- Barrie, L. A.; Bottenheim, J. W.; Schnell, R. C.
- Nature, Vol. 334, Issue 6178
Observations of BrO and its vertical distribution during surface ozone depletion at Alert
journal, May 2002
- Hönninger, Gerd; Platt, U.
- Atmospheric Environment, Vol. 36, Issue 15-16
Experimental verification of gas phase bromine enrichment in reactions of HOBr with sea salt doped ice surfaces
journal, June 1997
- Kirchner, U.; Benter, T. H.; Schindler, R. N.
- Berichte der Bunsengesellschaft für physikalische Chemie, Vol. 101, Issue 6
Evidence of reactive iodine chemistry in the Arctic boundary layer
journal, January 2010
- Mahajan, Anoop S.; Shaw, Marvin; Oetjen, Hilke
- Journal of Geophysical Research, Vol. 115, Issue D20
Bromine activation in the troposphere by the dark reaction of O 3 with seawater ice
journal, November 1998
- Oum, K. W.; Lakin, M. J.; Finlayson-Pitts, B. J.
- Geophysical Research Letters, Vol. 25, Issue 21
Bromide and chloride distribution across the snow-sea ice-ocean interface: A comparative study between an Arctic coastal marine site and an experimental sea ice mesocosm: HALIDES IN THE MARINE CRYOSPHERE
journal, August 2016
- Xu, Wen; Tenuta, Mario; Wang, Feiyue
- Journal of Geophysical Research: Oceans, Vol. 121, Issue 8
Iodine chemistry in the troposphere and its effect on ozone
journal, January 2014
- Saiz-Lopez, A.; Fernandez, R. P.; Ordóñez, C.
- Atmospheric Chemistry and Physics, Vol. 14, Issue 23
Spectroscopic measurement of bromine oxide and ozone in the high Arctic during Polar Sunrise Experiment 1992
journal, January 1994
- Hausmann, M.; Platt, U.
- Journal of Geophysical Research, Vol. 99, Issue D12
Release of Gas-Phase Halogens by Photolytic Generation of OH in Frozen Halide−Nitrate Solutions: An Active Halogen Formation Mechanism?
journal, June 2010
- Abbatt, J.; Oldridge, N.; Symington, A.
- The Journal of Physical Chemistry A, Vol. 114, Issue 23
Absolute absorption cross-section and photolysis rate of I<sub>2</sub>
journal, January 2004
- Saiz-Lopez, A.; Saunders, R. W.; Joseph, D. M.
- Atmospheric Chemistry and Physics, Vol. 4, Issue 5
Modelling molecular iodine emissions in a coastal marine environment: the link to new particle formation
journal, January 2006
- Saiz-Lopez, A.; Plane, J. M. C.; McFiggans, G.
- Atmospheric Chemistry and Physics, Vol. 6, Issue 4
Halogens in the coastal snow pack near Barrow, Alaska: Evidence for active bromine air-snow chemistry during springtime: BROMIDE IN SNOW NEAR BARROW
journal, February 2005
- Simpson, William R.; Alvarez-Aviles, Laura; Douglas, Thomas A.
- Geophysical Research Letters, Vol. 32, Issue 4
A mechanism for biologically-induced iodine emissions from sea-ice
journal, January 2015
- Saiz-Lopez, A.; Blaszczak-Boxe, C. S.; Carpenter, L. J.
- Atmospheric Chemistry and Physics Discussions, Vol. 15, Issue 7
Novel iodine chemistry in the marine boundary layer
journal, January 2004
- Saiz-Lopez, Alfonso
- Geophysical Research Letters, Vol. 31, Issue 4
The polar iodine paradox
journal, November 2016
- Saiz-Lopez, Alfonso; Blaszczak-Boxe, Christopher Shawn
- Atmospheric Environment, Vol. 145
High levels of molecular chlorine in the Arctic atmosphere
journal, January 2014
- Liao, Jin; Huey, L. Gregory; Liu, Zhen
- Nature Geoscience, Vol. 7, Issue 2
Observations of rapid photochemical destruction of ozone in snowpack interstitial air
journal, February 2001
- Peterson, M. C.; Honrath, R. E.
- Geophysical Research Letters, Vol. 28, Issue 3
Atmospheric Chemistry of Iodine
journal, October 2011
- Saiz-Lopez, Alfonso; Plane, John M. C.; Baker, Alex R.
- Chemical Reviews, Vol. 112, Issue 3
A review of air–ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids in snow
journal, January 2014
- Bartels-Rausch, T.; Jacobi, H. -W.; Kahan, T. F.
- Atmospheric Chemistry and Physics, Vol. 14, Issue 3
Dependence of the vertical distribution of bromine monoxide in the lower troposphere on meteorological factors such as wind speed and stability
journal, January 2015
- Peterson, P. K.; Simpson, W. R.; Pratt, K. A.
- Atmospheric Chemistry and Physics, Vol. 15, Issue 4
Modeling chemistry in and above snow at Summit, Greenland – Part 1: Model description and results
journal, January 2011
- Thomas, J. L.; Stutz, J.; Lefer, B.
- Atmospheric Chemistry and Physics, Vol. 11, Issue 10
Iodine emissions from the sea ice of the Weddell Sea
journal, January 2012
- Atkinson, H. M.; Huang, R. -J.; Chance, R.
- Atmospheric Chemistry and Physics, Vol. 12, Issue 22
The Role of Br2 and BrCl in Surface Ozone Destruction at Polar Sunrise
journal, January 2001
- Foster, K. L.
- Science, Vol. 291, Issue 5503
Equilibrium and Kinetics of Bromine Hydrolysis
journal, January 1996
- Beckwith, Richard C.; Wang, Tian Xiang; Margerum, Dale W.
- Inorganic Chemistry, Vol. 35, Issue 4
The distribution of dissolved inorganic iodine in the seas around Iceland
journal, September 2006
- Waite, Tim J.; Truesdale, Victor W.; Olafsson, Jon
- Marine Chemistry, Vol. 101, Issue 1-2
A comparison of Arctic BrO measurements by chemical ionization mass spectrometry and long path-differential optical absorption spectroscopy
journal, January 2011
- Liao, J.; Sihler, H.; Huey, L. G.
- Journal of Geophysical Research, Vol. 116
Extinction of UV radiation in Arctic snow at Alert, Canada (82°N)
journal, June 2001
- King, Martin D.; Simpson, William R.
- Journal of Geophysical Research: Atmospheres, Vol. 106, Issue D12
Uptake and reaction of HOI and IONO2 on frozen and dry NaCl/NaBr surfaces and H2SO4
journal, January 2001
- Holmes, Nicholas S.; Adams, Jonathan W.; Crowley, John N.
- Physical Chemistry Chemical Physics, Vol. 3, Issue 9
Atmospheric iodine levels influenced by sea surface emissions of inorganic iodine
journal, January 2013
- Carpenter, Lucy J.; MacDonald, Samantha M.; Shaw, Marvin D.
- Nature Geoscience, Vol. 6, Issue 2
Uptake and reaction of HOBr on frozen and dry NaCl/NaBr surfaces between 253 and 233 K
journal, January 2002
- Adams, J. W.; Holmes, N. S.; Crowley, J. N.
- Atmospheric Chemistry and Physics, Vol. 2, Issue 1
A mechanism for biologically induced iodine emissions from sea ice
journal, January 2015
- Saiz-Lopez, A.; Blaszczak-Boxe, C. S.; Carpenter, L. J.
- Atmospheric Chemistry and Physics, Vol. 15, Issue 17
Works referencing / citing this record:
Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion
journal, June 2019
- Wang, Siyuan; McNamara, Stephen M.; Moore, Christopher W.
- Proceedings of the National Academy of Sciences, Vol. 116, Issue 29
A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface
text, January 2017
- Artiglia, Luca; Edebeli, Jacinta; Orlando, Fabrizio
- ETH Zurich
A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface
journal, September 2017
- Artiglia, Luca; Edebeli, Jacinta; Orlando, Fabrizio
- Nature Communications, Vol. 8, Issue 1
Diurnal cycle of iodine, bromine, and mercury concentrations in Svalbard surface snow
journal, January 2019
- Spolaor, Andrea; Barbaro, Elena; Cappelletti, David
- Atmospheric Chemistry and Physics, Vol. 19, Issue 20
pH-dependent production of molecular chlorine, bromine, and iodine from frozen saline surfaces
journal, January 2019
- Halfacre, John W.; Shepson, Paul B.; Pratt, Kerri A.
- Atmospheric Chemistry and Physics, Vol. 19, Issue 7
Diurnal cycle of iodine, bromine, and mercury concentrations in Svalbard surface snow
journal, January 2019
- Spolaor, Andrea; Barbaro, Elena; Cappelletti, David
- Atmospheric Chemistry and Physics, Vol. 19, Issue 20
Holocene atmospheric iodine evolution over the North Atlantic
journal, January 2019
- Corella, Juan Pablo; Maffezzoli, Niccolo; Cuevas, Carlos Alberto
- Climate of the Past, Vol. 15, Issue 6
Characterization of aerosol growth events over Ellesmere Island during the summers of 2015 and 2016
journal, January 2019
- Tremblay, Samantha; Picard, Jean-Christophe; Bachelder, Jill O.
- Atmospheric Chemistry and Physics, Vol. 19, Issue 8
Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century
journal, April 2018
- Cuevas, Carlos A.; Maffezzoli, Niccolò; Corella, Juan Pablo
- Nature Communications, Vol. 9, Issue 1
Atmospheric chemistry of iodine anions: elementary reactions of I − , IO − , and IO 2 − with ozone studied in the gas-phase at 300 K using an ion trap
journal, January 2018
- Teiwes, Ricky; Elm, Jonas; Handrup, Karsten
- Physical Chemistry Chemical Physics, Vol. 20, Issue 45
pH-dependent production of molecular chlorine, bromine, and iodine from frozen saline surfaces
journal, January 2019
- Halfacre, John W.; Shepson, Paul B.; Pratt, Kerri A.
- Atmospheric Chemistry and Physics, Vol. 19, Issue 7
Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century
journal, April 2018
- Cuevas, Carlos A.; Maffezzoli, Niccolò; Corella, Juan Pablo
- Nature Communications, Vol. 9, Issue 1
Modeling the Sources and Chemistry of Polar Tropospheric Halogens (Cl, Br, and I) Using the CAM‐Chem Global Chemistry‐Climate Model
journal, July 2019
- Fernandez, Rafael P.; Carmona‐Balea, Antía; Cuevas, Carlos A.
- Journal of Advances in Modeling Earth Systems, Vol. 11, Issue 7
Processes Controlling the Composition and Abundance of Arctic Aerosol
journal, November 2018
- Willis, Megan D.; Leaitch, W. Richard; Abbatt, Jonathan P. D.
- Reviews of Geophysics, Vol. 56, Issue 4