Summer concentrations of NMHCs in ambient air of the Arctic and Antarctic

被引：0

作者：

Hellen, Heidi ^{[1
]}

Leck, Caroline ^{[2
]}

Paatero, Jussi ^{[1
]}

Virkkula, Aki ^{[1
,2
]}

Hakola, Hannele ^{[1
]}

机构：

[1] Finnish Meteorol Inst, FI-00101 Helsinki, Finland

[2] Stockholm Univ, Dept Meteorol, SE-10691 Stockholm, Sweden

来源：

BOREAL ENVIRONMENT RESEARCH | 2012年 / 17卷 / 05期

基金：

芬兰科学院;

关键词：

NONMETHANE HYDROCARBONS; SOURCE APPORTIONMENT; SEASONAL-VARIATION; ALKYL NITRATES; EMISSIONS; POLLUTION;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Summer concentrations of C-2-C-6 non-methane hydrocarbons (NMHCs) were measured in Antarctica and in the Arctic in 2008. The results show that NMHC concentrations are on average five times higher in the Arctic than in Antarctica. In Antarctica, there were few concentration peaks, but during most of the remaining time concentrations were below or close to the detection limits. Over the Arctic pack ice area north of 80 degrees, concentrations of most of the measured NMHCs were always above the detection limits. No differences based on air-mass origin were detected in Antarctica, but samples collected over the central Arctic Ocean showed higher concentrations in air masses being advected from the Kara Sea and the western-central Arctic Ocean. The relatively higher NMHC-to-ethyne molar ratios calculated for samples collected over the central Arctic Ocean suggest additional alkane sources in the region.

引用

页码：385 / 397

页数：13

共 43 条

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