Production of dicarboxylic acids in the Arctic atmosphere at polar sunrise
Production of dicarboxylic acids in the Arctic atmosphere at polar sunrise
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极地日出时北极大气中二羧酸的产生
DOI：
10.1029/95gl00880
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发表时间：
1995
影响因子：
5.2
通讯作者：
L. Barrie
中科院分区：
文献类型：
--
作者：
K. Kawamura;Hideki Kasukabe;O. Yasui;L. Barrie
从1987年7月至1988年6月在Alert采集的北极气溶胶样品中测定了一系列低分子二元酸(C2-C11)。草酸(C2)是优势物种，其次是丙二酸(C3)和琥珀酸(C4)。在极地日出时，北极雾霾气溶胶中的某些二元酸的含量比前几个黑暗的冬季月份增加了5到20倍。此外，它们与以微粒溴为标志的对流层臭氧消耗事件有关。在这里，我们第一次报告了在极地大气中观察到的二元酸，并从中纬度通过长距离大气输送到达北极的污染物前体的光化学氧化方面讨论了这些有机酸的形成。
An homologous series of low molecular weight dicarboxylic acids (C2–C11) have been measured in the arctic aerosol samples collected from July 1987 to June 1988 in Alert. Oxalic acid (C2) was found as the dominant species followed by malonic (C3) or succinic (C4 acid. At the time of polar sunrise, certain dicarboxylic acids in arctic haze aerosols became 5 to 20 times more abundant than in the preceding dark winter months. Furthermore, they are correlated with tropospheric ozone depletion events marked by particulate bromine. Here, we report, for the first time, observations of dicarboxylic acids in the polar atmosphere and discuss the formation of these organic acids in terms of photochemical oxidation of pollutant precursors that reach the Arctic by long range atmospheric transport from mid-latitudes.