Nitrous oxide (N2O) and transient tracer (chlorofluorocarbons, sulfur hexafluoride) concentrations from samples collected on three GO-SHIP cruises in the tropical Pacific Ocean during 2015-2016

Nitrous oxide (N2O) and transient tracer (chlorofluorocarbons, sulfur hexafluoride) concentrations were determined in water samples collected on three Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) cruises to investigate the transport, production, and efflux of N2O across the tropical Pacific Ocean. The three GO-SHIP cruises were 1) P16N in April – May 2015 aboard the R/V Ronald H. Brown, 2) P15S in April – June 2016 aboard the R/V Investigator, and 3) P18 in Nov – Dec 2016 aboard the R/V Ronald H. Brown from rosettes of either 24 or 36 – 10-liter (L) Niskin bottles equipped with Seabird SBE9plus CTDs. Samples for dissolved chlorofluorocarbons (CFC–11, CFC-12), sulfur hexafluoride (SF6), and N2O were collected following the method described in Bullister et al. (2008).本研究采集全球海洋船舶水文调查计划（Global Ocean Ship-based Hydrographic Investigations Program, GO-SHIP）3个航次的水样，对其中一氧化二氮（Nitrous oxide, N2O）与瞬态示踪剂（氯氟烃、六氟化硫）的浓度进行测定，以探究热带太平洋海域一氧化二氮的输运、产生过程及海气逸出通量。本次涉及的3个GO-SHIP航次具体信息如下：1）P16N航次：2015年4—5月，搭载平台为罗纳德·H·布朗号（R/V Ronald H. Brown）研究船；2）P15S航次：2016年4—6月，搭载平台为调查者号（R/V Investigator）研究船；3）P18航次：2016年11—12月，搭载平台为罗纳德·H·布朗号研究船。水样通过配备海鸟（Seabird）SBE9plus型温盐深仪（CTD）的24个或36个10升（L）规格尼斯金采水器（Niskin bottles）组成的采水笼采集。溶解态氯氟烃（CFC–11、CFC-12）、六氟化硫（SF6）及一氧化二氮（N2O）的样品采集流程遵循Bullister等（2008）发表的实验方法。