Role of nitrite in the photochemical formation of radicals in the snow.
Role of nitrite in the photochemical formation of radicals in the snow.
复制标题
亚硝酸盐在雪中自由基光化学形成中的作用。
DOI:
10.1021/es404002c
复制
发表时间:
2014
影响因子:
11.4
通讯作者:
Jacobi HW
中科院分区:
文献类型:
--
作者:
Jacobi HW
Photochemical reactions in snow can have an important impact on the composition of the atmosphere over snow-covered areas as well as on the composition of the snow itself. One of the major photochemical processes is the photolysis of nitrate leading to the formation of volatile nitrogen compounds. We report nitrite concentrations determined together with nitrate and hydrogen peroxide in surface snow collected at the coastal site of Barrow, Alaska. The results demonstrate that nitrite likely plays a significant role as a precursor for reactive hydroxyl radicals as well as volatile nitrogen oxides in the snow. Pollution events leading to high concentrations of nitrous acid in the atmosphere contributed to an observed increase in nitrite in the surface snow layer during nighttime. Observed daytime nitrite concentrations are much higher than values predicted from steady-state concentrations based on photolysis of nitrate and nitrite indicating that we do not fully understand the production of nitrite and nitrous acid in snow. The discrepancy between observed and expected nitrite concentrations is probably due to a combination of factors, including an incomplete understanding of the reactive environment and chemical processes in snow, and a lack of consideration of the vertical structure of snow.
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影响因子:
11.4
作者:
Chu, Liang;Anastasio, Cort
通讯作者:
Anastasio, Cort
DOI:
10.1016/0960-1686(93)90328-v
发表时间:
1993
期刊:
Atmospheric Environment. Part A. General Topics
影响因子:
--
作者:
Shao
通讯作者:
Shao
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
F. Dominé;J. Gallet;J. Bock;S. Morin
通讯作者:
S. Morin
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
H. Jacobi
通讯作者:
H. Jacobi
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Barret;F. Dominé;S. Houdier;J. Gallet;P. Weibring;J. Walega;A. Fried;D. Richter
通讯作者:
D. Richter