RV Investigator Voyage IN2018_V04 Underway UWY Data

This record describes the Underway (UWY) data collected from the Marine National Facility (MNF) RV Investigator Voyage IN2018_V04, titled: "Constraining external iron inputs and cycling in the southern extension of the East Australian Current." The voyage took place between September 11 and October 8, 2018 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 Temprature, 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 will be processed and archived within the CSIRO Oceans & Atmosphere (O&A) 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.

本记录描述了从国家海洋设施（Marine National Facility, MNF）“调查者号”（RV Investigator）航次IN2018_V04中采集的走航（Underway, UWY）数据，该航次主题为“约束东澳流南部延伸区的外源铁输入与循环过程”，航次执行时间为2018年9月11日至10月8日，从塔斯马尼亚州霍巴特出发并返回霍巴特。

标准走航数据为连续采集记录，包含以下类别：
1. 导航数据（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. 温盐仪（Thermosalinograph, TSG）：海水盐度、流量、水温、荧光值、二氧化碳分压（pCO₂）以及Optode型溶解氧传感器数据。
3. 大气数据（MET）：湿度、风速与风向（由风标和超声波传感器采集）、辐射计/海表温度、总辐射表/太阳辐射、光合有效辐射（Photosynthetically Active Radiation, PAR）、气温、气压、降雨、臭氧以及痕量气体（由左舷和右舷仪器采集）。

经质量控制的“调查者号”走航气象与海表温度（Sea Surface Temperature, SST）数据已提交至综合海洋观测系统（Integrated Marine Observing System, IMOS）下属的澳大利亚海洋数据网络（Australian Ocean Data Network, AODN），并可通过“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，供科研使用。美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）将从该服务器下载数据至其原位质量监测网站（iQUAM2），以供卫星海表温度验证使用。

SBE 38型海表温度数据已被澳大利亚气象局（Australian Bureau of Meteorology, BoM）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。

上述气象与海表温度数据已上传至全球电信系统（Global Telecommunications System, GTS），以供全球各气象机构分发；同时亦单独提交至SAMOS项目（http://samos.coaps.fsu.edu/html/），用于海气通量相关研究。

截至2017年，实时SBE 38型海表温度数据已被应用于以下数据产品（均可通过GTS获取）：
• 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（National Oceanic and Atmospheric Administration National Centers for Environmental Information, NOAA NCEI）扩展重建海表温度数据集第4版（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/）
• 全球海洋表面走航数据（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（Optimum Interpolation Sea Surface Temperature, 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（National Aeronautics and Space Administration Jet Propulsion Laboratory, NASA JPL）“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）
• 加拿大气象中心（Canadian Meteorological Centre, CMC）每日全球海表温度分析产品
• 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组成部分，本项目还生成了其他数据集（如pCO₂、ISAR SST），这些数据集将单独处理，并拥有独立的元数据记录。

本数据集的采集间隔为5秒。近实时数据可通过“走航数据可视化工具”链接获取。本数据集将由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）海洋与大气（Oceans & Atmosphere, O&A）信息与数据中心（IDC）进行处理与归档。数据集可按5秒（NetCDF格式）、10秒及5分钟（ASCII格式）的时间间隔获取。有关本数据集的更多详细信息，请参见本次航次的航次总结报告和/或数据处理报告。