Arctic-SOLAS 2007 atmospheric DMS, SO2, aerosol sulfate and MSA

The database consists of hourly atmospheric DMS concentrations, daily SO2 and total sulfate concentrations and three-day concentrations of size segregated aerosol sulfate. Samples were taken on the top of the navigation bridge of the CCGS Amundsen as it cruised along Baffin Bay and the Northwest Passage. Hourly samples of DMS was obtained using a customized DMS sampler. Samples were analyzed using a gas chromatograph fitted with a sulfur chemiluminesence detector (GC-SCD) to obtain atmospheric DMS concentrations. SO2 and total aerosol samples were obtained daily using a high volume sampler fitted with a quartz microfiber filter and K2CO3 treated cellulouse filter. Size segragated aerosol samples were obtained using a highvolume sampler fitted with slotted quartz filters on a 5 stage cascade impactor run for three days each sample. Concentrations of SO2, sulfate and MSA as well as other ions from the filter papers were obtained using ion chromatography. Delta34S values of SO2 and sulfate were obtained using a continuous flow isotope ratio mass spectrometer. Delta34S is reported based on the Vienna Canyon Diablo Troillite (V-CDT) international standard.

本数据库收录逐小时大气二甲基硫（Dimethyl Sulfide, DMS）浓度、每日二氧化硫（SO2）与总硫酸盐浓度，以及为期三天的分粒径气溶胶硫酸盐浓度数据。采样工作依托加拿大海岸警卫队“阿蒙森”号（CCGS Amundsen）开展，该船沿巴芬湾（Baffin Bay）与西北航道（Northwest Passage）航行，采样点位设于其驾驶桥楼顶层。

逐小时二甲基硫样品采用定制化二甲基硫采样器采集，随后使用搭载硫化学发光检测器（GC-SCD）的气相色谱仪进行分析，以获取大气中二甲基硫的浓度值。

每日采样环节采用搭载石英微纤维滤膜与碳酸钾（K2CO3）浸渍纤维素滤膜的大体积采样器，采集二氧化硫与总气溶胶样品。分粒径气溶胶样品则通过安装有5级级联撞击器并配备开槽石英滤膜的大体积采样器采集，每批次样品的采集周期为三天。

研究人员采用离子色谱法测定滤膜上二氧化硫、硫酸盐、甲基磺酸（Methanesulfonic Acid, MSA）及其他离子的浓度；采用连续流动同位素比率质谱仪测定二氧化硫与硫酸盐的δ34S值，该值的报告以维也纳峡谷迪亚布洛陨硫铁（Vienna Canyon Diablo Troilite, V-CDT）国际标准为参照基准。