ECCO Sea Surface Height - Daily Mean llc90 Grid (Version 4 Release 4)

This dataset provides daily-averaged dynamic sea surface height and model sea level anomaly on the native Lat-Lon-Cap 90 (LLC90) model grid from the ECCO Version 4 Release 4 (V4r4) ocean and sea-ice state estimate. Estimating the Circulation and Climate of the Ocean (ECCO) ocean and sea-ice state estimates are dynamically and kinematically-consistent reconstructions of the three-dimensional time-evolving ocean, sea-ice, and surface atmospheric states. ECCO V4r4 is a free-running solution of the 1-degree global configuration of the MIT general circulation model (MITgcm) that has been fit to observations in a least-squares sense. Observational data constraints used in V4r4 include sea surface height and model sea level anomaly (SSH) from satellite altimeters [ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1,2,3, CryoSat-2, and SARAL/AltiKa]; sea surface temperature (SST) from satellite radiometers [AVHRR], sea surface salinity (SSS) from the Aquarius satellite radiometer/scatterometer, ocean bottom pressure (OBP) from the GRACE satellite gravimeter; sea ice concentration from satellite radiometers [SSM/I and SSMIS], and in-situ ocean temperature and salinity measured with conductivity-temperature-depth (CTD) sensors and expendable bathythermographs (XBTs) from several programs [e.g., WOCE, GO-SHIP, Argo, and others] and platforms [e.g., research vessels, gliders, moorings, ice-tethered profilers, and instrumented pinnipeds]. V4r4 covers the period 1992-01-01T12:00:00 to 2018-01-01T00:00:00.

本数据集提供了基于原生的经纬度-电容90（LLC90）模型网格的每日平均动态海面高度和模型海平面异常数据，数据来源于ECCO版本4发布4（V4r4）的海洋和海冰状态估算。估算海洋环流与气候（ECCO）的海洋和海冰状态估算是对三维时间演化的海洋、海冰和表面大气状态的动态与动力学一致性重建。ECCO V4r4是对MIT通用环流模型（MITgcm）1度全球配置的独立解，并通过最小二乘法对观测数据进行拟合。V4r4中使用的观测数据约束包括来自卫星测高仪的海面高度和模型海平面异常（SSH）[ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1,2,3, CryoSat-2, 和 SARAL/AltiKa]；来自卫星辐射计的海面温度（SST）[AVHRR]、来自Aquarius卫星辐射计/散射计的海面盐度（SSS）、来自GRACE卫星重力仪的海洋底部压力（OBP）；来自卫星辐射计的海冰浓度[SSM/I和SSMIS]，以及通过导电-温度-深度（CTD）传感器和可抛式深温计（XBTs）从多个项目[例如，世界海洋环流实验（WOCE）、全球海洋通量研究（GO-SHIP）、Argo和其它]和平台[例如，研究船、水下滑翔机、锚泊浮标、冰 tethered探测器以及装备了仪器的海豹]现场测量的海洋温度和盐度。V4r4覆盖了从1992年1月1日12:00:00至2018年1月1日00:00:00的时间段。