Discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH on total scale and other hydrographic and chemical parameters obtained during R/V Nathaniel B. Palmer Repeat Hydrography and SOCCOM Cruise NBP18_02 in the Pacific Sector of Southern Ocean: GO-SHIP Section S04P (EXPOCODE 320620180309), from 2018-03-09 to 2018-05-14 (NCEI Accession 0225497)

This dataset includes discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH (on total scale), water temperature, salinity, dissolved oxygen, nitrate, nitrite, silicate, phosphate, chlorofluorocarbons and other chemical measurements during the R/V Nathaniel B. Palmer Repeat Hydrography and SOCCOM Cruise NBP18_02 in the Pacific Sector of Southern Ocean: GO-SHIP Section S04P (EXPOCODE 320620180309), from 2018-03-09 - 2018-05-14. The Pacific Ocean S04P repeat hydrographic line was reoccupied for the US Global Ocean Carbon and Repeat Hydrography Program. The survey of S04P 2018 consisted of CTDO, rosette, LADCP, UVP, water samples and underway measurements. The ship departed from the port of Hobart on the island of Tasmania, Australia and completed the cruise in the port of Punta Arenas, Chile.

本数据集包含2018年3月9日至2018年5月14日期间，在南大洋太平洋海域开展的研究船“内森尼尔·B·帕尔默号”(R/V Nathaniel B. Palmer)重复水文调查与南大洋碳与气候观测模拟项目(SOCCOM)航次NBP18_02中获取的离散剖面测量数据，测定参数涵盖溶解无机碳、总碱度、总尺度pH、水温、盐度、溶解氧、硝酸盐、亚硝酸盐、硅酸盐、磷酸盐、氯氟烃及其他化学指标；该调查区域为全球海洋船舶水文调查计划(GO-SHIP) S04P断面（EXPOCODE编号：320620180309）。
本次太平洋S04P重复水文断面的重测工作，隶属于美国全球海洋碳循环与重复水文调查计划。
2018年S04P断面的调查作业包含温盐深溶解氧剖面仪(CTDO)、罗塞特采水器(rosette)、下投式声学多普勒流速剖面仪(LADCP)、水下可视剖面仪(UVP)、水样采集与走航观测等内容。
本航次从澳大利亚塔斯马尼亚州霍巴特港启航，最终在智利蓬塔阿雷纳斯港完成全部航程。