%0 Journal Article
%T Nitrogen isotopic composition and source of nitrate in precipitation at Guiyang<br>贵阳地区大气降水中δ15N-NO3-组成及来源分析
%A XIAO Hongwei
%A XIAO Huayun
%A LONG Aimin
%A WANG Yanli
%A <br>肖红伟
%A 肖化云
%A 龙爱民
%A 王燕丽
%J 环境科学学报
%D 2012
%I 
%X This study analyzed the concentrations of NO-3 and values of δ15N-NO-3 in precipitation taken at Guiyang throughout one year from October 1, 2008 to September 30, 2009. The results indicated that the volume-weighted average concentration of NO-3 was 0.45 mg·L-1, and the value of δ15N-NO-3 ranges from -8.0‰ to 28.7‰ with the annual average of 2.3‰ This implied that the source of NO-3 was mainly from coal combustion. Significantly higher NO-3 concentration in winter than summer suggested that NO-3 concentration was mainly affected by precipitation. Seasonal variation of nitrogen isotopic composition was a bit different, with positive in autumn and winter and negative in spring and summer. This suggested that δ15N-NO-3 was mainly affected by biologically-released N, atmospheric nitrogen fixation and NOx behavior in the atmosphere.
%K Guiyang
%K precipitation
%K NO3-
%K nitrogen isotope
%K seasonal variation<br>贵阳
%K 降水
%K 硝酸盐
%K 氮同位素
%K 季节变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=4BDE6A0EACD1AFA704ABEFA8070E3AE9&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=E158A972A605785F&sid=2BCD2FED7562E194&eid=D4A72ABDCEDCE1BD&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=46