Iodine oxide in the Dead Sea Valley: Evidence for inorganic sources of boundary layer IO

摘要: [1] The importance of iodine oxide (IO) in tropospheric boundary layer chemistry has been well established the last decade. Iodine-containing radicals have detected regions high biological productivity. To date, most explanations assume biogenic precursors (e.g., emission iodocarbons). In a 2 week field campaign at Dead Sea, Israel, IO was found to exceed detection limit (0.3–2 parts per trillion (ppt)) almost daily, with peak levels topping 10 ppt. Macro algae are nonexistent because water's salinity. The Sea's microbiology is discussed detail, and organic sources be minor importance. Thus site can treated as unique place for investigation inorganic IO. Such processes recently included model studies. Our study focuses on first direct evidence reactive iodine. Heterogeneous release induced by photolysis, liquid phase ozone reactions, or catalytic HOX interactions NOx chemistry.