Salinity and temperature measurements from an oceanographic glider deployed in the northeastern Gulf of Mexico, cruise DP02, August 2015

A Slocum Glider was deployed within the DEEPEND study area near the time of the DEEPEND cruise DP02 in August 2015. As the glider traverses its transit path, it makes measurements at various depths from ~2m to almost 1000m. The measurements include conductivity, temperature, depth, chlorophyll, dissolved O2, and light field measurements. While the glider is deployed at sea, it surfaces and communicates 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 becomes available through a USF web site. After the glider’s recovery at the end of the deployment, the complete measurement suite is downloaded from the vehicle and processed, and also becomes available through the USF site as well as a national data archive. The data available during and after the deployment can help correlate the regional NRL hydrographic model and the satellite imagery to in situ measurements of subsurface water characteristics. The Slocum glider data for the DP02 deployment can be found at the Integrated Ocean Observing System (IOOS) glider data website, https://data.ioos.us/gliders/erddap/tabledap/Murphy-20150809T1355Z.html (Dataset ID: Murphy-20150809T1355Z, USF) The glider was deployed from the RV Point Sur on August 9, 2015 at ~12:45 UTC, at approx. 27°N, 89°W. Its initial transit was to the North (to ~ 28°N, 88.5°W). The glider operated at up to 200m depth until 2300 on 10 Aug., when the dive profiles were changed to 400m. The programmed path brought it to the Loop Current. Encountering the increased speed of the Loop Current waters, it was transported to the North, then East, before being advected to the South. The glider was programmed to cross the Loop Current and exit it to the East. Strong density stratification and communication problems resulted in the glider remaining within the Loop Current’s influence and it was unable to clear the current until far to the South of the planned survey area. It was recovered on 22 August, near 25.5°N, 86.5°W.

2015年8月，在DEEPEND巡航DP02执行期间前后，斯洛克姆滑翔机（Slocum Glider）被部署于DEEPEND研究海域内。该滑翔机沿航行路径行进时，会在约2米至近1000米的不同深度开展观测，观测内容包括电导率、温度、深度、叶绿素、溶解氧以及光场观测。滑翔机在海上部署期间，会按预定间隔上浮并与岸基控制站进行通信；每次上浮通信时，仅传输精简后的滑翔机平台状态与科学观测数据子集，相关数据可通过美国南佛罗里达大学（University of South Florida，简称USF）官网获取。待部署结束并回收滑翔机后，可从载具中下载全部观测数据集并进行处理，完整数据既可通过USF官网获取，也可通过国家数据档案馆获取。部署期间及部署后可获取的数据，可用于将美国海军研究实验室（Naval Research Laboratory，简称NRL）区域水文模型与卫星影像，与原位水下水体特性观测数据进行关联分析。本次DP02部署任务对应的斯洛克姆滑翔机观测数据，可在综合海洋观测系统（Integrated Ocean Observing System，简称IOOS）滑翔机数据网站获取，网址为https://data.ioos.us/gliders/erddap/tabledap/Murphy-20150809T1355Z.html（数据集编号：Murphy-20150809T1355Z，USF）。该滑翔机于2015年8月9日约12:45协调世界时（UTC），在北纬27°、西经89°附近，由RV Point Sur号调查船完成部署。其初始航行方向为北向，最终抵达约北纬28°、西经88.5°海域。该滑翔机此前最大作业深度为200米，直至8月10日23:00，其潜航剖面深度调整为400米。预设航行路径使其抵达环流（Loop Current）水域，由于遭遇环流的高速水流，滑翔机先被带往北向，随后转向东向，最终被携至南向。该滑翔机的预设任务为穿越环流并从其东侧脱离，但受强烈密度层结与通信故障影响，滑翔机始终处于环流影响范围内，直至远超规划调查区南侧区域才得以脱离环流。该滑翔机最终于8月22日在北纬25.5°、西经86.5°附近被回收。