RV Investigator Voyage IN2020_V08 Underway UWY Data

This record describes the Underway (UWY) data collected from the Marine National Facility (MNF) RV Investigator Voyage IN2020_V08, titled "SOLACE - Southern Ocean Large Areal Carbon Export: quantifying carbon sequestration in subpolar and polar waters." The voyage took place between December 5, 2020 and January 16, 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.

本记录描述了从澳大利亚国家海洋设施（Marine National Facility, MNF）“调查者号”（RV Investigator）IN2020_V08航次采集的走航（Underway, UWY）数据，航次主题为“SOLACE - 南大洋大区域碳输出：量化亚极区与极区水域的碳固存”。该航次于2020年12月5日至2021年1月16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、陀螺仪及多普勒计程仪（双GPS仪器）。
2. 温盐计（Thermosalinograph, TSG）：海水盐度、流量、水温、荧光值、二氧化碳分压（pCO2）及光学溶解氧传感器（Optode/Oxygen）。
3. 大气气象数据（MET）：湿度、风速与风向（风向标与超声传感器）、辐射计/海表温度（Sea Surface Temperature, SST）、总辐射表/太阳辐射、光合有效辐射（Photosynthetically Active Radiation, PAR）、空气温度、大气压强、降雨量、臭氧及痕量气体（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数据已提交至IMOS AODN，并在“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），并将数据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，作为数值天气预报模式的边界条件。

该气象与海表温度数据已上传至全球电信系统（Global Telecommunications System, GTS），向全球气象机构公开传播，同时另行提供给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/）
• NOAA国家环境信息中心（NCEI）扩展重建海表温度第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与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（Optimum Interpolation Sea Surface Temperature, OISST）分析产品（https://www.ncdc.noaa.gov/oisst）
• NASA喷气推进实验室（Jet Propulsion Laboratory, 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。本数据集已在位于霍巴特（塔斯马尼亚州）的澳大利亚联邦科学与工业研究组织（CSIRO）国家海洋基础设施与馆藏（National Collections and Marine Infrastructure, NCMI）信息与数据中心（IDC）完成处理与归档。数据提供5秒（NetCDF格式）、5秒、10秒、1分钟及5分钟（ASCII格式）多种时间分辨率版本。有关本数据集的更多信息详见本次航次的航次总结报告及/或数据处理报告。