Eastern Gulf of Mexico glider deployment M69 (2017-01-03 – 2017-01-13) – echo sounder water column backscatter intensity

A Slocum glider was deployed in the eastern Gulf of Mexico off Tampa Bay in January 2017. As the glider traversed its transit path, it collected measurements at various depths from ~2 m to near the seafloor or up to 200 m. While the glider was deployed at sea, it surfaced and communicated to an onshore control station at predetermined intervals. A decimated selection of vehicle and science measurement is transmitted during these surface transmissions, and the relevant data became available through a USF web site. After the glider’s recovery at the end of the deployment, the complete measurement suite was downloaded from the vehicle and processed and made available through the USF site including a national data archive. The measurements in this data set included water column biomass estimates and the raw echo sounder water column backscatter intensity measurements. Other data sets for this deployment include environmental water quality parameters, acoustic tag telemetry receiver detections, and passive acoustic recordings.

The glider was deployed on 2017-01-03 at the 30 m isobath. It attempted to transit northwest along the Gulfstream Natural Gas Pipeline; however, currents to the south prevented significant northward progress and eventually pushed the glider well to the south. It was recovered well south of Tampa Bay, off Longboat Key, on 2017-01-13.

The suite of related datasets includes results from gliders M66, M69, M70, and M72.

Glider M66: water quality variables (FL.x707.000:0001, https://doi.org/10.7266/N72N50PF), tag telemetry (FL.x707.000:0002, https://doi.org/10.7266/n7-ccc2-s109), and echosounder backscatter intensity (FL.x707.000:0003, https://doi.org/10.7266/n7-9yq5-w169).

Glider M69: water quality variables (FL.x707.000:0004, https://doi.org/10.7266/n7-n30g-bw27); acoustic tag telemetry receiver detections (FL.x707.000:0005, https://doi.org/10.7266/n7-406m-ak69); echosounder backscatter intensity (FL.x707.000:0007, https://doi.org/10.7266/n7-4skm-bj34), and passive acoustic recordings (FL.x707.000:0006, https://doi.org/10.7266/n7-5y6c-sj73).

Glider M70: water quality variables (FL.x707.000:0010, https://doi.org/10.7266/g51f95wz), and tag telemetry (FL.x707.000:0008, https://doi.org/10.7266/p2ymsrp4).

Glider M72: water quality variables (FL.x707.000:0011, https://doi.org/10.7266/ehj8evgw) and tag telemetry (FL.x707.000:0009, https://doi.org/10.7266/9va17amx).

2017年1月，一台斯洛库姆水下滑翔机（Slocum glider）被部署于墨西哥湾东部坦帕湾外海区域。该滑翔机沿航行路径行进期间，在约2米至海底附近或最大200米的不同深度采集了测量数据。在海上部署阶段，滑翔机会按预定间隔上浮，并与岸上控制站建立通信。每次上浮通信时，会传输经过精简筛选的载具与科学测量数据，相关数据可通过南佛罗里达大学（USF）官网获取。在部署结束回收该滑翔机后，研究人员从载具中下载完整的测量数据集，并进行处理后通过USF官网及国家数据档案馆对外发布。本数据集的测量内容包含水柱生物量估算结果与原始回声测深仪水柱反向散射强度数据。本次部署的其他数据集还涵盖环境水质参数、声学标签遥测接收机检测数据以及被动声学录音数据。

该滑翔机于2017年1月3日在30米等深线处完成部署，计划沿墨西哥湾流天然气管线向西北方向航行，但南部海流阻碍了其向北行进的进程，最终将滑翔机带至更靠南的区域。2017年1月13日，研究人员在坦帕湾南部远海的长船礁（Longboat Key）外海完成滑翔机回收。

本次部署相关的数据集还包含滑翔机M66、M69、M70及M72的观测结果。
滑翔机M66：水质变量数据（FL.x707.000:0001，https://doi.org/10.7266/N72N50PF）、标签遥测数据（FL.x707.000:0002，https://doi.org/10.7266/n7-ccc2-s109）以及回声测深仪反向散射强度数据（FL.x707.000:0003，https://doi.org/10.7266/n7-9yq5-w169）。
滑翔机M69：水质变量数据（FL.x707.000:0004，https://doi.org/10.7266/n7-n30g-bw27）、声学标签遥测接收机检测数据（FL.x707.000:0005，https://doi.org/10.7266/n7-406m-ak69）、回声测深仪反向散射强度数据（FL.x707.000:0007，https://doi.org/10.7266/n7-4skm-bj34）以及被动声学录音数据（FL.x707.000:0006，https://doi.org/10.7266/n7-5y6c-sj73）。
滑翔机M70：水质变量数据（FL.x707.000:0010，https://doi.org/10.7266/g51f95wz）以及标签遥测数据（FL.x707.000:0008，https://doi.org/10.7266/p2ymsrp4）。
滑翔机M72：水质变量数据（FL.x707.000:0011，https://doi.org/10.7266/ehj8evgw）以及标签遥测数据（FL.x707.000:0009，https://doi.org/10.7266/9va17amx）。