Tropospheric Halogen Chemistry: Sources, Cycling, and Impacts
نویسندگان
چکیده
William R. Simpson,*,† Steven S. Brown,‡ Alfonso Saiz-Lopez, Joel A. Thornton, and Roland von Glasow †Department of Chemistry and Biochemistry and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States ‡NOAA ESRL Chemical Sciences Division, Boulder, Colorado 80305-3337, United States Atmospheric Chemistry and Climate Group, Institute of Physical Chemistry Rocasolano, CSIC, 28006 Madrid, Spain Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195-1640, United States Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, Norfolk NR4 7TJ, U.K.
منابع مشابه
Sensitivity of Tropospheric Chemical Composition to Halogen-Radical Chemistry Using a Fully Coupled Size-Resolved Multiphase Chemistry/Global Climate System I: Halogen Distributions, Aerosol Composition, and Sensitivity of Climate-Relevant Gases
Observations and model calculations indicate that highly non-linear multiphase atmospheric processes involving inorganic Cl and Br significantly impact tropospheric chemistry and composition, aerosol evolution, and radiative transfer. The sensitivity of global atmospheric chemistry to the production of marine aerosol and the associated activation and cycling of inorganic Cl and Br was investiga...
متن کاملInteractions of bromine, chlorine, and iodine photochemistry during ozone depletions in Barrow, Alaska
The springtime depletion of tropospheric ozone in the Arctic is known to be caused by active halogen photochemistry resulting from halogen atom precursors emitted from snow, ice, or aerosol surfaces. The role of bromine in driving ozone depletion events (ODEs) has been generally accepted, but much less is known about the role of chlorine radicals in ozone depletion chemistry. While the potentia...
متن کاملTropospheric air pollution: ozone, airborne toxics, polycyclic aromatic hydrocarbons, and particles.
Tropospheric air pollution has impacts on scales ranging from local to global. Reactive intermediates in the oxidation of mixtures of volatile organic compounds (VOCs) and oxides of nitrogen (NOx) play central roles: the hydroxyl radical (OH), during the day; the nitrate radical (NO3), at night; and ozone (O3), which contributes during the day and night. Halogen atoms can also play a role durin...
متن کاملTropospheric Aerosol Impacts on Trace-Gas Budgets through Photolysis
Aerosols affect the global budgets of O3, OH and CH4 in part through their alteration of photolysis rates and in part through their direct chemistry interactions with gases (a.k.a. “heterogeneous chemistry”). The first effect is evaluated here with a global tropospheric chemistry transport model using recently developed global climatologies of tropospheric aerosols: a satellite-derived aerosol ...
متن کاملModeling the observed tropospheric BrO background: Importance of multiphase chemistry and implications for ozone, OH, and mercury
Aircraft and satellite observations indicate the presence of ppt (ppt ≡ pmol/mol) levels of BrO in the free troposphere with important implications for the tropospheric budgets of ozone, OH, and mercury. We can reproduce these observations with the GEOS-Chem global tropospheric chemistry model by including a broader consideration of multiphase halogen (Br-Cl) chemistry than has been done in the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 115 شماره
صفحات -
تاریخ انتشار 2015