Session: Halogens in the Earth System I (AGU Fall Meeting 2018)

V41A:
Halogens in the Earth System I

Session ID#: 57331

Session Description:

While halogens are minor volatile species on Earth, their significant effects on the physico-chemical properties of magmatic melts and fluids in the lithosphere and on the atmospheric chemistry makes them key actors of Earth processes. Their relatively high concentration in seawater and sediments combined with their distinct elemental compositions in these superficial reservoirs makes them useful tracers to evaluate recycling processes between the Earth’s mantle and surface. Emissions of both natural and anthropogenic halogens lead to perturbation of the atmospheric chemistry, and life-threatening contamination of soils and water. They are notably responsible for ozone depletion over various temporal and spatial scales, generating climate forcing. Studying halogens from the deep Earth to the atmosphere is thus crucial to better evaluate the global halogens budget and their impact on ozone and climate. This session includes presentations on numerous aspects of the role of halogens (Cl, Br, I) in the Earth system.

Primary Convener: Anita Cadoux, Université Paris Sud - Paris Saclay, GEOPS, Orsay, France

Conveners: Marion Louvel, University of Cambridge, Earth Sciences, Cambridge, United Kingdom, Ross J Salawitch, University of Maryland College Park, Department of Chemistry and Biochemistry, College Park, United States and Alfonso Saiz-Lopez, Spanish National Research Council, Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano (CSIC), Madrid, Spain

Primary Liaison: Anita Cadoux, Université Paris Sud - Paris Saclay, GEOPS, Orsay, France

Chairs: Anita Cadoux, Université Paris Sud - Paris Saclay, GEOPS, Orsay, France and Ross J Salawitch, University of Maryland College Park, Department of Chemistry and Biochemistry, College Park, United States

OSPA Liaison: Marion Louvel, Bristol University, Bristol, United Kingdom

Co-Organized with:
Volcanology, Geochemistry and Petrology, and Atmospheric Sciences

Cross-Listed:

A - Atmospheric Sciences

Proposed Co-Organized Session with:

A - Atmospheric Sciences

Index Terms:

0365 Troposphere: composition and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
1030 Geochemical cycles [GEOCHEMISTRY]
3613 Subduction zone processes [MINERALOGY AND PETROLOGY]
8430 Volcanic gases [VOLCANOLOGY]

Abstracts Submitted to this Session:

Halogens (F, Cl, Br, I) in altered ocean crust from the East Pacific Rise and SW Indian Ridge (Invited) (343895)

Mark Kendrick, Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia and Joëlle D'Andres, The Australian National University, Research School of Earth Sciences, Acton, Australia

Volcanic Halogens Processing and Impacts in the Troposphere and Stratosphere (Invited) (352274)

Tjarda Roberts¹, Line Jourdain¹, Thibaut Lurton², Fabrice Jegou¹ and Gwenael Berthet¹, (1)LPC2E/CNRS, Université d'Orléans, Orléans, France, (2)IPSL/CNRS, Sorbonne Université, Paris, France

Arctic Chlorine Chemistry Influenced by NO_x Pollution from Villages and Oil Fields (457676)

Kerri Pratt, University of Michigan Ann Arbor, Department of Chemistry, Ann Arbor, United States, Stephen M McNamara, University of Michigan Ann Arbor, Department of Chemistry, Ann Arbor, MI, United States, Angela R. W. Raso, Purdue University, West Lafayette, IN, United States, Siyuan Wang, CU Boulder/CIRES, Boulder, United States, Sham Thanekar, Pennsylvania State University Main Campus, University Park, PA, United States, Eric Boone, University of Michigan, Ann Arbor, MI, United States, Katheryn R Kolesar, University of Michigan Ann Arbor, Ann Arbor, United States, Peter Peterson, University of Michigan Ann Arbor, Ann Arbor, MI, United States, William R Simpson, University of Alaska, Geophysical Institute and Department of Chemistry and Biochemistry, Fairbanks, United States, Jose D Fuentes, Penn State University, University Park, United States and Paul B Shepson, Purdue University, Departments of Chemistry, and Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States

Cyanogen Halides (X-CN, X = Cl, Br, I) could be significant contributors to reactive halogen chemistry in the troposphere. (418160)

Dr. James Roberts, PhD, NOAA ESRL, Chemical Sciences Laboratory, Boulder, CO, United States, J A Neuman, Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, United States and Patrick R Veres, National Center for Atmospheric Research, Boulder, CO, United States

Preliminary Results from the 2018 ARAON-Antarctic Cruise: Halogen Reservoir Species in the Pristine Coastal Antarctic Peninsula during Fall (361273)

Daun Jeong¹, Roger Seco², Alex B Guenther², Keyhong Park³, Kitae Kim⁴, Y.J. Yoon⁴ and Saewung Kim⁵, (1)National Center for Atmospheric Research, Atmospheric Chemistry Observations & Modeling Laboratory, Boulder, United States, (2)University of California Irvine, Department of Earth System Science, Irvine, CA, United States, (3)Korea Polar Research Institute, Incheon, Korea, Republic of (South), (4)Korea Polar Research Institute, Incheon, South Korea, (5)University of California Irvine, Department of Earth System Science, Irvine, United States

Iodine monoxide (IO) variations over the tropical western Pacific observed by shipborne MAX-DOAS (390878)

Hisahiro Takashima¹, Saki Kato¹, Yugo Kanaya², Martina Michaela Friedrich³, Michel Van Roozendael³, Fumikazu Taketani⁴ and Takuma Miyakawa², (1)Fukuoka University, Fukuoka, Japan, (2)Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Kanagawa, Japan, (3)Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, (4)Japan Agency for Marine-Earth Science and Technology, RIGC, Yokosuka, Japan

Ozone Formation Induced by Reactive Bromine and Iodine Species in a polluted marine environment (463722)

Eran Tas, The Institute of Environmental Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel, Jerusalem, Israel and Moshe Shechner, Hebrew University, Rohovot, Israel

The impacts of size dependent particle acidity and availability of particle chloride on the production of ClNO₂ and Cl₂ (420902)

Jessica Haskins, University of Washington Seattle, Atmospheric Sciences, Seattle, WA, UNITED STATES, Rahul A Zaveri, Pacific Northwest Natl Lab, Richland, United States and Joel A Thornton, University of Washington, Department of Atmospheric and Climate Science, Seattle, United States