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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >New Geophysical Model Function for Ocean Emissivity at 89 GHz Over Arctic Waters
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New Geophysical Model Function for Ocean Emissivity at 89 GHz Over Arctic Waters

机译：89 GHz在北极水域的海洋发射率的新地球物理模型功能

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摘要

New empirical geophysical model functions (GMFs) have been developed to interpret 89-GHz brightness temperature measurements over cold Arctic seas. Careful data screening is applied to the Advanced Microwave Scanning Radiometer 2 (AMSR2) multifrequency measurements to exclude atmospheric scattering and large absorption impacts, to estimate the 89-GHz sea surface emissivity and its relative changes with surface wind speed (SWS). Matched-up wind speeds are directly derived from the AMSR2 low-frequency measurements. The GMFs are obtained from the AMSR2 level 1R 89 GHz measurements corrected for the atmospheric impact with physical models and atmospheric parameters derived from the AMSR2 data. A carefully selected database encompasses mostly cold sea conditions (<4 degrees C) and a large range of wind speed conditions, including extratropical cyclone and polar low high-wind events over the Nordic Seas. Resulting GMFs contrast with previously proposed ones manifesting larger SWS signal at horizontal and positive SWS signal at vertical polarization.
机译：已经开发出新的经验地球物理模型功能（GMFS）以解释冷北极海洋的89GHz亮度温度测量。仔细数据筛选应用于先进的微波扫描辐射计2（AMSR2）多频测量以排除大气散射和大吸收影响，以估计89-GHz海面发射率及其表面风速（SWS）的相对变化。匹配的风速直接来自AMSR2低频测量。 GMFS是从AMSR2级别的1R 89 GHz测量获得，以纠正与来自AMSR2数据的物理模型和大气参数的大气影响。精心挑选的数据库包括大多数冷海条件（<4摄氏度）和大量的风速条件，包括北欧海域的鞋面旋风和极性低风险事件。产生的GMFS与先前提出的GMFS对比，在垂直极化下在水平和正SWS信号处表现出较大的SWS信号。

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