DOI: 10.1002/2015GL067608
论文题名: On the formation of tropical rings of atomic halogens: Causes and implications
作者: Saiz-Lopez A. ; Fernandez R.P.
刊名: Geophysical Research Letters
ISSN: 0094-9253
EISSN: 1944-8984
出版年: 2016
卷: 43, 期: 6 起始页码: 2928
结束页码: 2935
语种: 英语
英文关键词: halogen-mediated mercury oxidation
; halogenated VSLs
; tropical ring of atomic bromine
; tropical ring of atomic iodine
; tropospheric halogen chemistry
Scopus关键词: Atmospheric chemistry
; Atmospheric movements
; Bromine
; Iodine
; Photochemical reactions
; Tropics
; Atmospheric phenomena
; Atmospheric transport
; Atomic bromines
; Atomic iodine
; Halogenated VSLs
; Mercury oxidations
; Photochemical equilibrium
; Tropical tropopause layers
; Atoms
; atmospheric chemistry
; bromine compound
; emission
; equilibrium
; experimental study
; halocarbon
; halogen
; iodine
; mercury (element)
; photochemistry
; photooxidation
; tropopause
英文摘要: Halogens produced by ocean biological and photochemical processes reach the tropical tropopause layer (TTL), where cold temperatures and the prevailing low ozone abundances favor the diurnal photochemical enhancement of halogen atoms. Under these conditions atomic bromine and iodine are modeled to be the dominant inorganic halogen species in the sunlit TTL, surpassing the abundance of the commonly targeted IO and BrO radicals. We suggest that due to the rapid photochemical equilibrium between halogen oxides and halogen atoms a natural atmospheric phenomenon evolves, which we have collectively termed "tropical rings of atomic halogens." We describe the main causes controlling the modeled appearance and variability of these superposed rings of bare bromine and iodine atoms that circle the tropics following the Sun. Some potential implications for atmospheric oxidizing capacity are also explored. Our model results suggest that if experimentally confirmed, the extent and intensity of the halogen rings would directly respond to changes in oceanic halocarbon emissions, their atmospheric transport, and photochemistry. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978319065&doi=10.1002%2f2015GL067608&partnerID=40&md5=3863bf810205999978edde82e896b346
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10216
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain
Recommended Citation:
Saiz-Lopez A.,Fernandez R.P.. On the formation of tropical rings of atomic halogens: Causes and implications[J]. Geophysical Research Letters,2016-01-01,43(6).