RV Investigator Voyage IN2021_V04 Underway UWY Data

This record describes the Underway (UWY) data collected from the Marine National Facility (MNF) RV Investigator Voyage IN2021_V04, titled "Biodiversity Assessment of Australia’s Indian Ocean Territories." The voyage took place between June 30 and July 29, 2021 departing from Darwin (NT) and arriving in Hobart (TAS).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.Data are recorded at 5 second intervals. Near real-time data are available via the link "Visualisation tool for Underway Data." This dataset has been 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), 10 sec 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.

本数据集记录了由澳大利亚国家海洋设施（Marine National Facility, MNF）所属“调查者号”（RV Investigator）执行的IN2021_V04航次所采集的走航观测数据（Underway data），该航次主题为“澳大利亚印度洋领地生物多样性评估”。本航次于2021年6月30日至7月29日期间执行，从北领地（NT）达尔文港出发，最终抵达塔斯马尼亚州（TAS）霍巴特港。
标准走航观测数据为连续采集记录，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、陀螺仪数据以及多普勒计程仪（双GPS仪器）。(2) 温盐测量仪（Thermosalinograph, TSG）：海水盐度、流量、水温、荧光值、二氧化碳分压（pCO2）以及光学溶解氧传感器（Optode/Oxygen）数据。(3) 大气观测数据（Atmospheric data, MET）：湿度、风速与风向（由风标及超声波传感器采集）、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、臭氧浓度以及痕量气体（由左舷与右舷仪器采集）数据。
经质量控制的“调查者号”走航气象及海表温度（Sea Surface Temperature, SST）数据已提交至IMOS AODN，相关数据可通过“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，以供科研使用。美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）会从该服务器下载数据，用于其原位质量监测网站（iQUAM2），并将数据用于卫星海表温度验证工作。SBE 38型海表温度传感器采集的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流程，随后作为边界条件应用于数值天气预报模型。上述气象及海表温度数据已上传至全球电信系统（Global Telecommunications System, GTS），以供全球气象机构分发；同时数据还会单独提交至SAMOS项目（http://samos.coaps.fsu.edu/html/），用于海气通量相关研究。
当前（2017年）实时采集的SBE 38型海表温度数据已被应用于以下数据集产品（通过全球电信系统GTS获取）：
• 国际综合海洋大气数据集（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第4版扩展重建海表温度数据集（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（HadSST3）（http://www.metoffice.gov.uk/hadobs/hadsst3/）
• 全球海表面走航数据（GOSUD）项目（http://www.gosud.org/）
• 澳大利亚气象局每日及周度海表温度分析产品（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“雷诺兹”每日全球最优插值海表温度分析产品（https://www.ncdc.noaa.gov/oisst）
• 美国国家航空航天局喷气推进实验室“MUR”1公里分辨率每日全球海表温度分析产品（https://mur.jpl.nasa.gov/）
• 英国气象局“OSTIA”每日全球海表温度分析产品（http://ghrsst-pp.metoffice.com/pages/latest_analysis/ostia.html）
• CMC每日全球海表温度分析产品
• Ourocean“G1SST”全球1公里分辨率每日海表温度分析产品（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海表温度数据），这些数据集将单独处理并拥有独立的元数据记录。
数据采集间隔为5秒。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。数据集提供三种时间分辨率的数据：5秒间隔（NetCDF格式）、10秒间隔以及5分钟间隔（ASCII格式）。有关本数据集的更多详细信息可查阅本航次的航次总结报告及/或数据处理报告。