Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from surface underway observations using carbon dioxide gas analyzer, shower head equilibrator and other instruments from R/V Sonne cruises SO234 and SO235 (EXPOCODEs: 06BE20140710 and 06BE20140723) in the Indian Ocean from 2014-07-10 to 2014-08-08 (NCEI Accession 0162204)

NCEI Accession 0162204 includes surface underway, chemical, meteorological and physical data collected from R/V Sonne cruises SO234 and SO235 in the Indian Ocean from 2014-07-10 to 2014-08-08. These data include measurements of mole fraction of CO2 in the equilibrator headspace (dry) at equilibrator temperature, mole fraction of CO2 measured in dry outside air, barometric pressure in the equilibrator headspace, barometric pressure, corrected to sea level, water temperature in equilibrator, sea surface temperature, sea surface salinity, fugacity of CO2 in sea water at SST and 100% humidity. The instruments used to collect these data include carbon dioxide (CO2) gas analyzer and shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement.

These data were collected by Tobias Steinhoff of GEOMAR Helmholtz Centre for Ocean Research as part of the R/V Sonne research cruises in the Indian Ocean. The cruise Expedition codes (EXPOCODE) are 06BE20140710 and 06BE20140723.

美国国家环境信息中心（National Centers for Environmental Information, NCEI）存档编号0162204数据集，涵盖2014年7月10日至2014年8月8日期间，于印度洋执行科考任务的桑尼号（R/V Sonne）研究船SO234与SO235航次所采集的走航表层、化学、气象及物理观测数据。该数据集包含以下测量项：平衡器顶空干燥气中的二氧化碳摩尔分数（对应平衡器工作温度）、干燥外界空气中测得的二氧化碳摩尔分数、平衡器顶空气压、经海平面校正后的大气压强、平衡器内水温、海表温度、海表盐度，以及海表温度与100%湿度条件下海水中二氧化碳的逸度。采集本数据集所用仪器包括二氧化碳（CO₂）气体分析仪，以及用于自主二氧化碳测量的淋浴式舱室平衡器。
本数据集由亥姆霍兹基尔海洋研究中心（GEOMAR Helmholtz Centre for Ocean Research Kiel）的托比亚斯·施泰因霍夫（Tobias Steinhoff），作为桑尼号研究船印度洋科考航次的一部分采集所得。本次航次的航次代码（EXPOCODE）分别为06BE20140710与06BE20140723。