Partial pressure (or fugacity) of carbon dioxide, temperature, salinity and other variables collected from the coastal surface underway observations using carbon dioxide gas analyzer, shower head equilibrator and other instruments from R/V Gordon Gunter in the North Atlantic Ocean, US North-East co

In March, 2008, the Ocean Carbon Cycle (OCC) group at NOAA's Atlantic Oceanographic and Meteorological Laboratory (AOML) installed an underway system to measure surface pCO2 in the Hydro Chem Lab aboard the Gordon Gunter. In August 2010, the underway system was replaced with a newer version system that could be connected more easily to the ship and other sensors. The installations were greatly facilitated by the cooperation of the ship's officers and crew, especially the operation officers and electronic technicians. While the ship conducts the research that is the focus of a cruise, the pCO2 instrument takes 5 air and 60 water measurements every 3 hours.

NCEI Accession 0162290 includes Surface underway, chemical, meteorological and physical data collected from NOAA Ship R/V Gordon Gunter in the North Atlantic Ocean, US North-East coast during 2017. 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, and difference between sea water fCO2 and interpolated air fCO2. 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 Rik Wanninkhof and Denis Pierrot of US DOC; NOAA; OAR; Atlantic Oceanographic and Meteorological Laboratory as part of the R/V Gordon Gunter research coastal cruises GU1701 Transit Leg, GU1701 Leg 1 and 2, GU1702 data set. The cruise Expedition codes (EXPOCODE) are 33GG20170505, 33GG20170516, 33GG20170530, 33GG20170610.

2008年3月，美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，简称NOAA）下属大西洋海洋与气象实验室（Atlantic Oceanographic and Meteorological Laboratory，简称AOML）的海洋碳循环（Ocean Carbon Cycle，简称OCC）团队，在“戈登·冈特号”（Gordon Gunter）科考船的水化学实验室安装了一套用于测量表层二氧化碳分压（surface pCO2）的走航观测系统。2010年8月，该套走航观测系统被更新版本替代，新版本可更便捷地与船舶及其他传感器对接。本次设备安装工作得到了该船船员与管理人员的大力协助，尤其离不开值班驾驶员与电子技师的配合。当该船执行既定航次研究任务时，这套二氧化碳分压（pCO2）仪器每3小时即可完成5次空气采样与60次海水采样测量。

NCEI登录号（Accession）0162290涵盖的数据集，为2017年美国东北海岸北大西洋海域中，NOAA科考船“戈登·冈特号”采集的表层走航化学、气象与物理数据。此类数据包含以下多项测量结果：平衡器顶空（干燥状态）内的二氧化碳摩尔分数（平衡器温度下测定）、干燥外界空气中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、平衡器内水温、海表温度、海表盐度、海表温度与100%湿度条件下海水中的二氧化碳逸度（fugacity of CO2，fCO2），以及海水fCO2与插值得到的大气fCO2之间的差值。用于采集上述数据的仪器包括二氧化碳（CO2）气体分析仪，以及用于自主二氧化碳测量的淋浴式平衡器（shower head chamber equilibrator）。

这批数据由美国商务部（US DOC）下属NOAA、海洋与大气研究局（Office of Oceanic and Atmospheric Research，简称OAR）、大西洋海洋与气象实验室的里克·万宁克霍夫（Rik Wanninkhof）与丹尼斯·皮埃罗（Denis Pierrot）采集，作为“戈登·冈特号”沿岸科考航次的一部分，具体涉及GU1701航渡段、GU1701航段1与2以及GU1702数据集。本次航次的航次代码（EXPOCODE）分别为33GG20170505、33GG20170516、33GG20170530、33GG20170610。