Cross-Calibrated Multi-Platform Ocean Surface Wind Vector Analysis Product V2, 1987 - ongoing

The CCMP data set combines cross-calibrated satellite microwave winds and instrument observations using a Variational Analysis Method (VAM) to produce high-resolution (0.25 degree) gridded analyses. Satellite wind retrievals derived by Remote Sensing Systems from a number of satellite-borne passive and active microwave instruments are used. RSS intercalibrates radiometers at the brightness temperature level to within 0.2 degree Celsius, applying a refined sea-surface emissivity model and radiative transfer function to derive surface winds. The resulting wind retrievals are highly consistent between microwave radiometer instrument platforms, including SSM/I, SSMIS, AMSR, TMI, WindSat, and GMI. RSS has also developed a geophysical model function for deriving wind speeds and directions from microwave scatterometers, including QuikSCAT and ASCAT. Both radiometer and scatterometer data are validated against ocean moored buoys, which confirm the measurements are in agreement (to within 0.8 m/s) despite the difference in wind measurement and retrieval methodologies. The VAM combines RSS instrument data with moored buoy measurements and a starting estimate (first-guess) of the wind field. The European Center for Medium-Range Weather Forecasts (ECMWF) ERA-Interim Reanalysis winds are used in the CCMP V2.0 processing as the first-guess wind field. This 0.25 degree model wind field is consistently processed, as opposed to that of the ECMWF operational model for which the model changes over time. All wind observations (satellite and buoy) and model analysis fields are referenced to a height of 10 meters.

CCMP数据集通过运用变分分析法（VAM）将卫星微波风速和仪器观测数据进行跨校准，从而生成高分辨率（0.25度）的网格化分析。数据集采用遥感系统从多种搭载于卫星上的被动和主动微波仪器中提取的风速恢复数据。遥感系统（RSS）在亮度温度层面将辐射计进行校准，精确度达到0.2摄氏度，并应用精细化的海面发射率模型和辐射传输函数以推导出地表风速。所得的风速恢复数据在微波辐射计仪器平台间高度一致，包括SSM/I、SSMIS、AMSR、TMI、WindSat和GMI。RSS还开发了一种地球物理模型函数，用于从微波散射计（如QuikSCAT和ASCAT）中推导风速和风向。辐射计和散射计数据均经过海洋浮标进行验证，尽管在风速测量和恢复方法上存在差异，但验证结果与测量值在0.8米/秒范围内一致。VAM将RSS仪器数据与浮标测量数据以及风场的初始估计值（首次猜测）相结合。在CCMP V2.0处理过程中，欧洲中期天气预报中心（ECMWF）的ERA-Interim再分析风速被用作首次猜测风场。该0.25度模型风场得到持续处理，与ECMWF运行模型的变化性形成对比。所有风速观测（卫星和浮标）以及模型分析场均参照10米高度进行引用。

搜集汇总

背景与挑战

背景概述

该数据集是一个跨校准的多平台海洋表面风矢量分析产品，结合卫星微波风和仪器观测数据，使用变分分析方法生成高分辨率（0.25度）的网格分析。数据覆盖全球范围，时间跨度为1987年至今，数据格式为netCDF4，由Remote Sensing Systems提供。