海面风矢量对不同极化状态海表面亮温的遥感影响研究

发布时间：2019-05-11 05:48

【摘要】：本文从海面风矢量与不同极化状态下海表面亮温参数的关系入手,利用2014年5月1日西北太平洋区域Windsat卫星L2风场数据和SMOS(Soil Moisture and Ocean Salinity)卫星L1C数据,定量分析了风速和风向对亮温的影响。研究结果表明:海表面亮温的变化,风速大于风向的影响;V极化状态下垂直亮温对风速、风向的敏感性最强,Stokes2亮温参数对风速的敏感性最低,20°风向变化对Stokes1亮温参数敏感性最低;海面亮温在3级风速内和0°~150°风向区间受风场影响变化较小,亮温波动显著区域主要集中在6级风速以上和300°~360°风向区间。
[Abstract]:In this paper, based on the relationship between sea surface wind vector and sea surface brightness temperature parameters under different polarization conditions, the L2 wind field data of Windsat satellite and L1C data of SMOS (Soil Moisture and Ocean Salinity) satellite in Northwest Pacific region on May 1, 2014 are used. The influence of wind speed and direction on brightness temperature is analyzed quantitatively. The results show that the influence of wind speed is greater than that of wind direction with the change of sea surface brightness temperature. Under the condition of V polarization, the sensitivity of vertical brightness temperature to wind speed and wind direction is the strongest, the sensitivity of Stokes2 brightness temperature parameters to wind speed is the lowest, and the sensitivity of 20 掳wind direction change to Stokes1 brightness temperature parameters is the lowest. The brightness temperature of the sea surface is less affected by the wind field in the wind direction range of 0 掳~ 150 掳and within the level 3 wind speed, and the significant fluctuation area of the brightness temperature is mainly concentrated above the wind speed of grade 6 and the wind direction range of 300 掳~ 360 掳.
【作者单位】：上海海洋大学海洋科学学院;远洋渔业协同创新中心;国家海洋环境监测中心;
【基金】：电磁波信息科学教育部重点实验室开放基金(EMW201501)
【分类号】：P715.7

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