RV Investigator Voyage IN2017_T01 Underway UWY Data

This record describes the Underway (UWY) data collected from the Marine National Facility (MNF) RV Investigator Voyage IN2017_T01, titled: "Natural iron fertilisation of oceans around Australia: linking terrestrial dust and bushfires to marine biogeochemistry." The voyage took place between September 24 and October 8, 2017 departing from Sydney (NSW) and arriving in Broome (WA).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 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.

本记录描述了从澳大利亚国家海洋设施（Marine National Facility, MNF）“调查者号”（RV Investigator）航次IN2017_T01获取的走航（Underway, UWY）数据，航次主题为《澳大利亚周边海域自然铁施肥效应：连接陆地尘埃与丛林火灾对海洋生物地球化学的影响》。本次航次于2017年9月24日至10月8日开展，从新南威尔士州悉尼出发，最终抵达西澳大利亚州布鲁姆。

标准走航数据为连续采集记录，包含以下三类内容：
1. 导航数据（NAV）：纬度、经度、航速、艏向、对地航向、陀螺罗经数据以及采用双GPS仪器的多普勒计程仪数据；
2. 温盐记录仪（Thermosalinograph, TSG）：海水盐度、流速、水温、荧光强度、二氧化碳分压（pCO2）以及光学溶解氧传感器（Optode/Oxygen）数据；
3. 大气气象数据（MET）：湿度、风速与风向（配备风标和超声风速仪）、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、臭氧以及痕量气体数据（采用左舷和右舷两套观测仪器）。

经质量控制的“调查者号”走航气象与海表温度（SST）数据已提交至澳大利亚海洋科学数据网络（IMOS AODN），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（NOAA）从该服务器下载数据，用于其原位质量监测网站（iQUAM2），并开放用于卫星海表温度验证。SBE 38型海表温度传感器数据被澳大利亚气象局用于实时卫星海表温度验证，并纳入实时海表温度分析产品，作为数值天气预报模型的边界条件。

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），供全球气象机构分发；同时还分别向SAMOS项目（http://samos.coaps.fsu.edu/html/）提供数据，用于海气通量相关研究。2017年时，实时SBE 38型海表温度数据已被应用于以下数据产品（可通过全球电信系统获取）：
- 国际综合海洋-大气数据集（International Comprehensive Ocean-Atmosphere Data Set, ICOADS R3.0）（http://icoads.noaa.gov/）
- NOAA国家环境信息中心（NCEI）扩展重构海表温度第4版（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每周海表温度分析产品（http://www.bom.gov.au/marine/sst.shtml）
- NOAA NCEI“雷诺兹”每日全球最优插值海表温度（OISST）分析产品（https://www.ncdc.noaa.gov/oisst）
- NASA喷气推进实验室（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）
- 加拿大环境与气候变化部（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海表温度数据），此类数据集将单独进行处理，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（CSIRO）海洋与大气信息与数据中心（IDC）进行处理与归档。数据集提供三种数据时间规格：5秒间隔（NetCDF格式）、10秒间隔及5分钟间隔（ASCII格式）。有关本数据集的更多详细信息，可查阅本次航次的航次总结报告和/或数据处理报告。