SCOPE-Falkor - FK180310 - Optics - C-STAR, ECO

These Simons Collaboration on Ocean Processes and Ecology (SCOPE) data products were produced by the University of Hawaiʻi at Mānoa with support from the Simons Foundation. The 2018 SCOPE-Falkor Cruise north of Oahu, Hawaii, built on the observations of the SCOPE expeditions conducted during 2015-2017 by looking at diel variability associated with the deep chlorophyll maximum and quantifying the impact of mesoscale eddies on the ecology and functioning of the North Pacific Subtropical Gyre. A unique aspect to the expedition was the use of Long-Range Autonomous Underwater Vehicles (LRAUVs) which were integrated into the science operations in conjunction with other oceanographic equipment. For this dataset, two biooptical instruments were plumbed to the underway uncontaminated seawater on the R/V Falkor. Data for each instrument were averaged to the hour and matched to a timestamp every hour. C-star: Filtered values (<0.2 um) removed from all data. ECO: filtered values (<0.2 um) removed from all data; chl fluorescence converted to mg/m3 using factory calibrations. The volume scattering is converted to particle backscattering coefficient following Boss and Pegau (2001). LEG 1 - Mar 15-24 and LEG 2 - Mar 28-Apr 9 2018. WARNING: Leg 1 yielded much noisier data compared to Leg 2 as ship was in constant transit (data from first few days of Leg 1 already excluded). This is attributed to bubbles associated with shallow intake depth of the ship. Leg 2 data, where sampling was overall Lagrangian and ship was stationary, show much smoother patterns. The timestamps are in UTC.本数据集属于西蒙斯海洋过程与生态合作项目（Simons Collaboration on Ocean Processes and Ecology, SCOPE）的数据产品，由夏威夷大学马诺阿分校制作，并得到西蒙斯基金会的资助。 2018年在夏威夷瓦胡岛以北开展的SCOPE-Falkor科考航次，以2015-2017年SCOPE科考航次的观测数据为基础，重点研究了与深层叶绿素极大值相关的日变化特征，并量化了中尺度涡旋对北太平洋副热带环流生态系统结构与功能的影响。本次航次的特色之处在于将远程自主水下航行器（Long-Range Autonomous Underwater Vehicles, LRAUVs）与其他海洋科考设备整合，融入整个科考作业流程。 本数据集搭载于"Falkor"号科考船，其生物光学仪器均接入船载走航未受污染的海水采样系统。所有仪器数据均按小时进行平均处理，并每小时匹配一个时间戳。 C-star仪器：所有原始数据均已剔除<0.2 μm的过滤组分； ECO仪器：所有原始数据均已剔除<0.2 μm的过滤组分；叶绿素荧光强度通过工厂校准系数转换为mg/m³单位； 体散射信号参照Boss与Pegau（2001）提出的方法，转换为粒子后向散射系数。 本次航次分为两个航段：航段1为2018年3月15日至24日，航段2为2018年3月28日至4月9日。 注意事项：相较于航段2，航段1获取的数据噪声水平显著更高，原因在于科考船全程处于航行状态（航段1最初几日的数据已被剔除），该现象由船舶取水深度较浅导致的气泡干扰引起。航段2的采样整体采用拉格朗日方式，且科考船处于停泊状态，因此数据序列更为平滑。所有时间戳均采用协调世界时（UTC）。