The Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) system
The Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) system
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DOI：
10.1016/j.rse.2010.10.017
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发表时间：
2012-01-15
影响因子：
13.5
通讯作者：
Wimmer, Werenfrid
中科院分区：
文献类型：
--
作者：
Donlon, Craig J.;Martin, Matthew;Wimmer, Werenfrid
本文介绍了一种新的海表温度（SST）分析，该分析在气象局每天产生全球覆盖，称为业务SST和海冰分析（OSTIA）系统。OSTIA使用国际机构通过高分辨率SST（GHRSST）区域/全球任务共享（R/GTS）框架提供的卫星SST数据。GHRSST产品包括微波和红外卫星仪器提供的数据，并附有不确定性估计。该系统还使用全球电信系统提供的现场SST数据和欧洲气象卫星应用组织海洋和海冰卫星应用设施提供的海冰密集度产品。SST分析是一种多尺度最优插值，专为数值天气预报和海洋预报系统中的应用而设计。背景误差协方差矩阵使用海洋模型数据指定，分析使用10公里和100公里的相关长度尺度。OSTIA系统以1/20度（类似于6 km）的输出网格分辨率产生基础SST估计值（SSTfnd，无日变的SST），尽管最小分析特征分辨率基于10 km的相关长度尺度。根据ENVISAT高级沿着航迹扫描辐射计（AATSR）SST数据和漂流浮标的现场SST测量值，对所有卫星SST数据进行偏差误差调整。对数据进行过滤（根据表面风速数据），以消除日变化，并对AATSR数据进行调整，以代表在与漂移浮标测量相同深度（0.2-1米）的SST，然后进行偏差调整。每天以GHRSST L4 netCDF格式提供全球覆盖率输出。还提供了各种次级产品，包括每周和每月的平均数据集。持续监测OSTIA产品，确认/验证活动证明SST产品具有零平均偏差，与原位测量值相比，准确度接近0.57 K。OSTIA现在被气象局和欧洲中期天气预报中心（ECMWF）用作所有天气预报模型的边界条件。OSTIA由英国气象局制作，是欧盟全球环境与安全监测（GMES）MyOcean项目的一部分。皇冠版权所有（C）2011由爱思唯尔公司出版。All rights reserved.
This paper describes a new Sea surface temperature (SST) analysis that is produced with global coverage on a daily basis at the Met Office called the Operational SST and Sea Ice Analysis (OSTIA) system. OSTIA uses satellite SST data provided by international agencies via the Group for High Resolution SST (GHRSST) Regional/Global Task Sharing (R/GTS) framework. GHRSST products include data from microwave and infrared satellite instruments with accompanying uncertainty estimates. The system also uses in situ SST data available over the Global Telecommunications System (GTS) and a sea-ice concentration product from the EUMETSAT Ocean and Sea Ice Satellite Applications Facility (OSI-SAF). The SST analysis is a multi-scale optimal interpolation that is designed for applications in numerical weather prediction and ocean forecasting systems. The background error covariance matrix is specified using ocean model data and the analysis uses correlation length scales of 10 km and 100 km. The OSTIA system produces a foundation SST estimate (SSTfnd, which is the SST free of diurnal variability) at an output grid resolution of 1/20 degrees (similar to 6 km) although the smallest analysis feature resolution is based on the correlation length scale of 10 km. All satellite SST data are adjusted for bias errors based on a combination of ENVISAT Advanced Along Track Scanning Radiometer (AATSR) SST data and in situ SST measurements from drifting buoys. Data are filtered (based on surface wind speed data) to remove diurnal variability and AATSR data are adjusted to represent the SST at the same depth as drifting buoy measurements (0.2-1 m) before bias adjustments are made. Global coverage outputs are provided each day in GHRSST L4 netCDF format. A variety of secondary products are also provided including weekly and monthly mean data sets. OSTIA products are continuously monitored and validation/verification activities demonstrate that SST products have zero mean bias and an accuracy of similar to 0.57 K compared to in situ measurements. OSTIA is now used operationally as a boundary condition for all weather forecast models at the Met Office and at European Centre for Medium-range Weather Forecasting (ECMWF). OSTIA is produced by the Met Office as part of the European Union Global Monitoring for Environment and Security (GMES) MyOcean project. Crown Copyright (C) 2011 Published by Elsevier Inc. All rights reserved.