Atmospheric mercury chemistry: Sensitivity of global model simulations to chemical reactions
نویسندگان
چکیده
منابع مشابه
A new mechanism for atmospheric mercury redox chemistry: implications for the global mercury budget
Mercury (Hg) is emitted to the atmosphere mainly as volatile elemental Hg0. Oxidation to water-soluble HgII plays a major role in Hg deposition to ecosystems. Here, we implement a new mechanism for atmospheric Hg0 /HgII redox chemistry in the GEOS-Chem global model and examine the implications for the global atmospheric Hg budget and deposition patterns. Our simulation includes a new coupling o...
متن کاملAtmospheric Chemistry and Chemical Mechanisms
INTRODUCTION........................................................................................................................... 1 OVERVIEW OF ATMOSPHERIC VOC OXIDATION ............................................................... 2 CURRENT STATE OF KNOWLEDGE ........................................................................................ 4 Inorganic Reactions.....................
متن کاملGlobal atmospheric model for mercury including oxidation by bromine atoms
Global models of atmospheric mercury generally assume that gas-phase OH and ozone are the main oxidants converting Hg0 to HgII and thus driving mercury deposition to ecosystems. However, thermodynamic considerations argue against the importance of these reactions. We demonstrate here the viability of atomic bromine (Br) as an alternative Hg0 oxidant. We conduct a global 3-D simulation with the ...
متن کاملCoupling advection and chemistry in a global atmospheric test model
In this talk we consider the numerical difficulties that arise when horizontal advection is coupled with chemistry on a sphere, using operator splitting. From a numerical point of view, these two processes are the most difficult parts of an atmospheric model for global studies. The advection process is solved on a uniform grid and on a so-called reduced grid, where less cells are used near 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
ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2006
ISSN: 0148-0227
DOI: 10.1029/2005jd006780