RV Investigator Voyage IN2021_V02 Underway UWY Data

This record describes the Underway (UWY) data collected from the Marine National Facility (MNF) RV Investigator Voyage IN2021_V02, titled "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania." The voyage took place between April 14 and April 27, 2021 departing from Hobart (TAS) and arriving in Hobart. Standard Underway data is continuously recorded, consisting of: (1) Navigation data (NAV): Latitude, Longitude, Speed, Heading, Course Over Ground, Gyros, and Doppler Log (dual GPS instrument). (2) Thermosalinograph (TSG): Water Salinity, Flow-Rate, Temperature, Fluorescence, pCO2 and Optode/Oxygen. (3) Atmospheric (MET): Humidity, Wind Speed and Direction (vane and ultrasonic), Radiometer/Sea Surface Temperature, Pyranometer/Solar Radiation, Photosynthetically Active Radiation (PAR), Air Temperature, Air Pressure, Rain, Ozone and Trace Gases (port and starboard instruments).The quality-controlled RV Investigator underway meteorological and SST data are supplied to the IMOS AODN where they are publicly available at the "Ships of Opportunity" Thredds server (http://thredds.aodn.org.au/thredds/catalog/IMOS/SOOP/SOOP-ASF/VLMJ_Investigator/catalog.html) for research. From there, they are downloaded by NOAA for their In Situ Quality Monitoring web site (iQUAM2) and made available for satellite SST validation. The SBE 38 SST data are used within the Australian Bureau of Meteorology for real-time satellite SST validation and ingested into real-time SST analyses which are then used as the boundary condition for Numerical Weather Prediction models. The meteorological and SST data are uploaded onto the Global Telecommunications System (GTS) for global dissemination to Meteorological Agencies, and separately supplied to the SAMOS (http://samos.coaps.fsu.edu/html/) Project for air-sea flux research. The real-time SBE 38 SST data are currently (2017) used in the following data products (accessed via the GTS):• International Comprehensive Ocean-Atmosphere Data Set (ICOADS R3.0) (http://icoads.noaa.gov/) • NOAA NCEI Extended Reconstructed Sea Surface Temperature version 4 (ERSST.v4) (https://www.ncdc.noaa.gov/data-access/marineocean-data/extended-reconstructed-sea-surface-temperature-ersst-v4) • Hadley Centre SST Data Set (HadSST3) (http://www.metoffice.gov.uk/hadobs/hadsst3/)• Global Ocean Surface Underway Data (GOSUD) Project (http://www.gosud.org/) • Bureau of Meteorology daily and weekly SST analyses (http://www.bom.gov.au/marine/sst.shtml) • NOAA NCEI “Reynolds” daily global OISST analysis (https://www.ncdc.noaa.gov/oisst)• NASA JPL “MUR” 1 km daily global SST analysis (https://mur.jpl.nasa.gov/)• UK Met Office “OSTIA” daily global SST analysis (http://ghrsst-pp.metoffice.com/pages/latest_analysis/ostia.html)• CMC daily global SST analysis• Ourocean “G1SST” global daily 1 km SST analysis (https://ourocean.jpl.nasa.gov/SST)As part of the underway data gathering system, other datasets are produced (e.g., pCO2, ISAR SST) which are processed separately and have their own metadata records.Near real-time data are available via the link "Visualisation tool for Underway Data." This dataset is processed and archived within the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC) in Hobart (TAS). Data are available at time intervals of 5 sec (NetCDF format), 5 sec, 10 sec, 1 min and 5 min (ASCII format). Additional information regarding this dataset is contained in the Voyage Summary and/or the Data Processing Report for this voyage.

本记录描述了从海洋国家设施（Marine National Facility, MNF）“调查者号”（RV Investigator）航次IN2021_V02采集得到的走航（Underway, UWY）数据，该航次的项目标题为“SOTS：塔斯马尼亚西南海域用于气候与碳循环研究的南大洋时间序列自动锚系系统”。本次航次于2021年4月14日至4月27日开展，从塔斯马尼亚州霍巴特出发并最终返回霍巴特。

标准走航数据为连续采集序列，包含以下类别：
(1) 导航数据（Navigation data, NAV）：纬度、经度、航速、航向、对地航向、陀螺仪以及多普勒计程仪（双GPS仪器）；
(2) 温盐测量仪（Thermosalinograph, TSG）数据：海水盐度、流速、水温、荧光强度、二氧化碳分压（pCO₂）以及溶解氧传感器（Optode/Oxygen）；
(3) 大气数据（Atmospheric data, MET）：湿度、风速与风向（风标与超声波式传感器）、辐射计/海表温度、总辐射计/太阳辐射、光合有效辐射（Photosynthetically Active Radiation, PAR）、气温、气压、降雨量、臭氧以及痕量气体（左舷与右舷仪器）。

经质量控制的“调查者号”走航气象与海表温度（Sea Surface Temperature, SST）数据已提交至IMOS AODN，相关数据可在“机遇船舶”Thredds服务器（http://thredds.aodn.org.au/thredds/catalog/IMOS/SOOP/SOOP-ASF/VLMJ_Investigator/catalog.html）公开获取，用于科研工作。

上述数据随后被美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）下载至其原位质量监测网站（iQUAM2），用于卫星海表温度验证工作。SBE 38型海表温度数据被澳大利亚气象局用于实时卫星海表温度验证，并被纳入实时海表温度分析产品，作为数值天气预报（Numerical Weather Prediction, NWP）模型的边界条件。

该气象与海表温度数据已上传至全球电信系统（Global Telecommunications System, GTS），向全球气象机构进行分发；同时还单独提交至SAMOS项目（http://samos.coaps.fsu.edu/html/），用于海-气通量研究。截至2017年，实时SBE 38型海表温度数据已被应用于以下可通过GTS获取的数据产品：
• 国际综合海洋大气数据集（International Comprehensive Ocean-Atmosphere Data Set, ICOADS R3.0）（http://icoads.noaa.gov/）
• 美国国家海洋和大气管理局国家环境信息中心扩展重建海表温度数据集第4版（NOAA NCEI Extended Reconstructed Sea Surface Temperature version 4, ERSST.v4）（https://www.ncdc.noaa.gov/data-access/marineocean-data/extended-reconstructed-sea-surface-temperature-ersst-v4）
• 哈德利中心海表温度数据集（Hadley Centre SST Data Set, HadSST3）（http://www.metoffice.gov.uk/hadobs/hadsst3/）
• 全球海洋走航数据（Global Ocean Surface Underway Data, GOSUD）项目（http://www.gosud.org/）
• 澳大利亚气象局每日及每周海表温度分析产品（http://www.bom.gov.au/marine/sst.shtml）
• 美国国家海洋和大气管理局国家环境信息中心"Reynolds"全球每日最优插值海表温度（OISST）分析产品（https://www.ncdc.noaa.gov/oisst）
• 美国国家航空航天局喷气推进实验室"MUR"全球每日1公里分辨率海表温度分析产品（https://mur.jpl.nasa.gov/）
• 英国气象局"OSTIA"全球每日海表温度分析产品（http://ghrsst-pp.metoffice.com/pages/latest_analysis/ostia.html）
• 加拿大环境与气候变化部（CMC）全球每日海表温度分析产品
• Ourocean"G1SST"全球每日1公里分辨率海表温度分析产品（https://ourocean.jpl.nasa.gov/SST）

作为走航数据采集系统的一部分，本项目还生成了其他数据集（如pCO₂、ISAR SST数据），这些数据集将单独处理并拥有独立的元数据记录。近实时数据可通过“走航数据可视化工具”链接获取。

本数据集已在位于塔斯马尼亚州霍巴特的澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）国家馆藏与海洋基础设施（NCMI）信息与数据中心（IDC）完成处理与归档。数据集提供多种时间分辨率版本：5秒（NetCDF格式）、5秒、10秒、1分钟及5分钟（ASCII格式）。有关本数据集的更多详细信息，可查阅本次航次的航次总结报告及/或数据处理报告。