Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle ASV_Saildrone1020 (EXPOCODE 32DB20190119) in the South Atlantic Ocean, South Pacific Ocean, Indian Ocean and Southern Ocean from 2019-01-19 to 2019-08-03 (NCEI Accession 0221912)

This dataset includes surface chemical, meteorological and physical data collected from Autonomous Surface Vehicle ASV_Saildrone1020 (EXPOCODE 32DB20190119) in the South Atlantic Ocean, South Pacific Ocean, Indian Ocean and Southern Ocean from 2019-01-19 to 2019-08-03. These data include xCO2 SW (wet) - mole fraction of CO2 in air in equilibrium with the seawater at sea surface temperature and measured humidity; H2O SW - mole fraction of H2O in air from equilibrator; xCO2 Air (wet) - mole fraction of CO2 in air at measured humidity; H2O Air - mole fraction of H2O in air; barometric pressure; MAPCO2 %O2 - the percent oxygen of the surface seawater divided by the percent oxygen of the atmosphere; SST - sea surface temperature; SSS - sea surface salinity; xCO2 SW (dry) - mole fraction of CO2 in air in equilibrium with the seawater at sea surface temperature (dry air); xCO2 Air (dry) - mole fraction of CO2 in air (dry air); fCO2 SW (sat) - fugacity of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); fCO2 Air (sat) - fugacity of CO2 in air (100% humidity); dfCO2 - difference of the fugacity of the CO2 in seawater and the fugacity of the CO2 in air (fCO2 SW - fCO2 Air); pCO2 SW (wet) - partial pressure of CO2 in air in equilibrium with the seawater at sea surface temperature (100% humidity); pCO2 Air (wet) - partial pressure of CO2 in air (100% humidity); dpCO2 - difference of the partial pressure of CO2 in seawater and air (pCO2 SW - pCO2 Air) and Wind speed at the anemometer. The Autonomous Surface Vehicle CO2 (ASVCO2) instruments used to collect these data include Bubble type equilibrator for autonomous carbon dioxide (CO2) measurement, Carbon dioxide (CO2) gas analyzer, Humidity Sensor, and oxygen meter.

本数据集涵盖2019年1月19日至2019年8月3日期间，于南大西洋、南太平洋、印度洋及南大洋，由自主水面航行器（Autonomous Surface Vehicle, ASV）Saildrone1020（航次编码EXPOCODE 32DB20190119）采集的表层化学、气象与物理数据。
所包含的数据具体如下：xCO₂ SW（湿基）——与海水在海表温度及实测湿度下达到平衡的空气中的二氧化碳摩尔分数；H₂O SW——来自平衡器的空气中的水摩尔分数；xCO₂ Air（湿基）——实测湿度下空气中的二氧化碳摩尔分数；H₂O Air——空气中的水摩尔分数；大气压强；MAPCO2 %O₂——表层海水中氧气占比与大气中氧气占比的比值；海表温度（Sea Surface Temperature, SST）；海表盐度（Sea Surface Salinity, SSS）；xCO₂ SW（干基）——与海水在海表温度下（干空气环境）达到平衡的空气中的二氧化碳摩尔分数；xCO₂ Air（干基）——干空气环境下空气中的二氧化碳摩尔分数；fCO₂ SW（饱和）——与海水在海表温度下（100%湿度）达到平衡的空气中的二氧化碳逸度；fCO₂ Air（饱和）——100%湿度下空气中的二氧化碳逸度；dfCO2——海水中二氧化碳逸度与空气中二氧化碳逸度的差值（fCO₂ SW - fCO₂ Air）；pCO₂ SW（湿基）——与海水在海表温度下（100%湿度）达到平衡的空气中的二氧化碳分压；pCO₂ Air（湿基）——100%湿度下空气中的二氧化碳分压；dpCO2——海水中与空气中二氧化碳分压的差值（pCO₂ SW - pCO₂ Air），以及风速计测得的风速。
用于采集本数据集数据的自主水面航行器CO₂（ASVCO2）仪器包括：用于自主二氧化碳（CO₂）测量的气泡式平衡器、二氧化碳（CO₂）气体分析仪、湿度传感器以及氧气分析仪。