DMS and DMSP Data from CTD and Minicosm experiments conducted during the BROKE-West voyage of the Aurora Australis, 2006

Data Acquisition:Sampling was performed on seawater collected from CTDs and minicosm experiments. Sampling involved the collection of 250 mL of seawater from each Niskin bottle and minicosm sampled. 100 mL of this was fixed with 1 mL of concentrated hydrochloric acid (HCl). A second 100 mL sample was filtered through a 0.45 micron filter and then fixed with HCl. The remaining water was filtered and purged, with the volatile gases eluted being trapped on gold wool enclosed in glass tubes.Data Analysis:Analysis of the gold wool tubes involved heating the tubes to separate the dimethylsulphide (DMS) and then purge and trap followed by gas chromatography (GC) to give the DMS concentration of the seawater sample. The fixed water samples and filtered fixed water samples were basified and then the DMS formed during this process was purged, trapped and analysed by GC to determine the dissolved and particulate dimethylsulphoniopropionate (DMSP) concentrations. Analysis is expected to take approximately one year to complete.Dataset Format: The data for the CTD sampling is in the following format - CTD Number; Niskin Bottle; DMS Concentration (nM); DMSP particulate concentration (nM); DMSP dissolved concentration (nM)The data for the minicosm sampling is in the following format: Minicosm Number; Minicosm Day; Hour; Tank Number; DMS Concentration (nM); DMSP particulate concentration (nM); DMSP dissolved concentration (nM)Acronyms Used:CTD - conductivity, temperature, pressureDMS - dimethylsulphide DMSP - dimethylsulphoniopropionateDMSO - dimethylsulphoxideGC - gas chromatographyThis work was completed as part of ASAC projects 2655 and 2679 (ASAC_2655, ASAC_2679).

数据采集：本次采样对象为CTD（Conductivity, Temperature, Pressure，电导率-温度-压力剖面仪）采集的海水，以及微型生态系统（minicosm）实验装置中的海水。采样时，从每个尼斯金采水器（Niskin bottle）及微型生态系统装置中采集250 mL海水样本；取其中100 mL海水，加入1 mL浓盐酸（HCl）进行固定。另取100 mL样本经0.45微米滤膜过滤后，同样用浓盐酸固定。剩余海水经过滤、吹扫处理，将洗脱的挥发性气体捕集于封装在玻璃管中的金羊毛（gold wool）上。
数据分析：对金羊毛玻璃管的分析流程为：先加热试管以分离二甲基硫（dimethylsulphide, DMS），随后通过吹扫捕集结合气相色谱（gas chromatography, GC）测定海水样本中的DMS浓度。对固定后的海水样本及过滤固定后的海水样本进行碱化处理，将过程中生成的DMS经吹扫捕集后通过气相色谱分析，以测定溶解态及颗粒态二甲基巯基丙酸内盐（dimethylsulphoniopropionate, DMSP）的浓度。本项分析工作预计耗时约一年方可完成。
数据集格式：CTD采样数据格式如下：CTD编号; 尼斯金采水器编号; DMS浓度（纳摩尔/升，nM）; 颗粒态DMSP浓度（纳摩尔/升，nM）; 溶解态DMSP浓度（纳摩尔/升，nM）。微型生态系统采样数据格式如下：微型生态系统编号; 实验天数; 小时数; 培养槽编号; DMS浓度（纳摩尔/升，nM）; 颗粒态DMSP浓度（纳摩尔/升，nM）; 溶解态DMSP浓度（纳摩尔/升，nM）。
所用缩写说明：CTD——电导率-温度-压力剖面仪（Conductivity, Temperature, Pressure）；DMS——二甲基硫（dimethylsulphide）；DMSP——二甲基巯基丙酸内盐（dimethylsulphoniopropionate）；DMSO——二甲基亚砜（dimethylsulphoxide）；GC——气相色谱（gas chromatography）。
本研究系ASAC项目2655与2679（ASAC_2655、ASAC_2679）的研究内容之一。