Aircraft measurement of dicarboxylic acids in the free tropospheric aerosols over the western to central North Pacific
Aircraft measurement of dicarboxylic acids in the free tropospheric aerosols over the western to central North Pacific
复制标题
北太平洋西部到中部自由对流层气溶胶中二羧酸的飞机测量
DOI：
10.3402/tellusb.v55i3.16365
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Y. Makino
中科院分区：
文献类型：
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作者：
M. Narukawa;Kimitaka Kawamura;Kikuo Okada;Y. Zaizen;Y. Makino
2000年2月对气溶胶进行了飞机观测，观察了北太平洋西部至中部自由对流层中二元酸的空间和垂直分布。气溶胶样品中以草酸、丙二酸、己二酸和杜鹃酸为主。随着海拔的升高，这些二元酸的浓度呈指数下降。它们在西北太平洋西部(130°E)较高，向东降低。在那霸(冲绳)、伊沃济马和塞班岛上空进行的本地飞行显示，二酸浓度从对流层下层到对流层上层逐渐下降。塞班岛上空的空气中，二酸浓度几乎低于检测限值，因为那里的空气受东亚污染的影响不大。Naha和Iwojima上二元酸的垂直分布在冬季西北太平洋上是典型的，这表明二元酸从东亚被显著地注入到自由对流层。向后的大气质量轨迹还表明，北太平洋自由对流层中的二元酸受到东亚外流的强烈影响。二元酸是东亚污染空气中一次发射和二次光化学过程产生的产物，可以改变西北太平洋上空自由对流层中气溶胶的物理化学性质。
Aircraft observation of aerosols was conducted in February 2000, for spatial and vertical distributionsof dicarboxylic acids in the free troposphere over the western to central North Pacific. Oxalic, malonic, adipic and azelaic acids were detected in the aerosol samples as the major species. Concentrations ofthese diacids decreased exponentially with an increase in altitude. They were higher in the westernNorth Pacific (130°E) and decrease eastward. Local flights conducted over Naha (Okinawa), Iwojimaand Saipan showed that diacid concentrations decreased from the lower to upper troposphere.In the atmosphere over Saipan, where the air is not strongly affected from polluted East Asia, diacidconcentrations were almost below the detection limit. Vertical profiles of diacids over Naha and Iwojimawould be typical over the western North Pacific during winter, suggesting that diacids weresignificantly injected to the free troposphere from East Asia. Backward air mass trajectories alsosuggested that the diacids in the free troposphere over the North Pacific are strongly affected bythe outflow from East Asia. Diacids, which were produced by both primary emission and secondaryphotochemical processes in polluted air of East Asia, could alter the physico-chemical properties ofaerosols in the free troposphere over the western North Pacific.
影响因子：
--
作者：
M. Mochida;A. Kawabata;K. Kawamura;H. Hatsushika;K. Yamazaki
通讯作者：
M. Mochida;A. Kawabata;K. Kawamura;H. Hatsushika;K. Yamazaki
影响因子：
5
作者：
M. Narukawa;K. Kawamura;Shao-Meng Li;J. Bottenheim
通讯作者：
M. Narukawa;K. Kawamura;Shao-Meng Li;J. Bottenheim