Surface underway measurements of partial pressure of carbon dioxide (pCO2), sea surface temperature, sea surface salinity and other parameters from Autonomous Surface Vehicle ASV_Saildrone1001 (EXPOCODE 32DB20170317) in the North Pacific Ocean, Coastal California region from 2017-03-17 to 2017-04-25 (NCEI Accession 0209685)

This dataset includes surface chemical, meteorological and physical data collected from Autonomous Surface Vehicle ASV_Saildrone1001 (EXPOCODE 32DB20170317) in the North Pacific Ocean, Coastal California region from 2017-03-17 to 2017-04-25. 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 from airblock, 2 feet above the sea surface at measured humidity; H2O Air - mole fraction of H2O in air from airblock, 2 feet above the sea surface; atmospheric pressure at the airblock, 2 feet above the sea surface; temperature of the Infrared Licor 820 in degrees Celsius; MAPCO2 %O2 - the percent oxygen of the surface seawater divided by the percent oxygen of the atmosphere at 2 feet above the sea surface; 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 at the airblock, 2 feet above the sea surface (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 at the airblock, 2 feet above the sea surface (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 at the airblock, 2 feet above the sea surface (100% humidity); dpCO2 - difference of the partial pressure of CO2 in seawater and air (pCO2 SW - pCO2 Air and pH of seawater (on total scale). 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.

本数据集包含2017年3月17日至2017年4月25日期间，于北太平洋加利福尼亚沿岸海域，由自主水面航行器（Autonomous Surface Vehicle，ASV）Saildrone1001（航次编码EXPOCODE 32DB20170317）采集的表层化学、气象及物理数据。本次采集的数据涵盖：xCO₂ SW（湿基）：在海表温度与实测湿度条件下，与海水达到平衡的空气中的CO₂摩尔分数；H₂O SW：来自平衡器的空气中的H₂O摩尔分数；xCO₂ Air（湿基）：来自海面上方2英尺处气块的空气中的CO₂摩尔分数（经实测湿度校正）；H₂O Air：来自海面上方2英尺处气块的空气中的H₂O摩尔分数；海面上方2英尺处气块的大气压强；LI-COR 820红外分析仪的温度（单位：摄氏度）；MAPCO₂ %O₂：表层海水中的氧气百分比与海面上方2英尺处大气氧气百分比的比值；海表温度（Sea Surface Temperature, SST）；海表盐度（Sea Surface Salinity, SSS）；xCO₂ SW（干基）：在海表温度条件下，与海水达到平衡的干空气中的CO₂摩尔分数；xCO₂ Air（干基）：海面上方2英尺处气块的干空气中的CO₂摩尔分数；fCO₂ SW（饱和湿基）：在海表温度与100%湿度条件下，与海水达到平衡的空气中的CO₂逸度；fCO₂ Air（饱和湿基）：海面上方2英尺处气块的空气中的CO₂逸度（100%湿度条件下）；dfCO₂：海水中CO₂逸度与空气中CO₂逸度的差值（即fCO₂ SW - fCO₂ Air）；pCO₂ SW（湿基）：在海表温度与100%湿度条件下，与海水达到平衡的空气中的CO₂分压；pCO₂ Air（湿基）：海面上方2英尺处气块的空气中的CO₂分压（100%湿度条件下）；dpCO₂：海水中与空气中CO₂分压的差值（即pCO₂ SW - pCO₂ Air），以及海水总尺度pH值。本数据集采集所用的自主水面航行器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、湿度传感器及氧气测量仪。