渤、黄、东海泡沫厚度的分布及对亮温的修正
发布时间：2019-04-10 10:28
【摘要】：基于泡沫动力模型和破碎波模型,利用MASNUM海浪模式计算得到2003年渤、黄、东海的泡沫厚度,利用多层微波辐射理论及泡沫模型得到海表泡沫层的发射率及泡沫层对观测亮温的修正率。分析结果显示,泡沫层厚度在不同季节的分布特征及大小各不同,不仅与风速有关,而且与波面状态也密切相关;泡沫层的海表发射率随泡沫厚度的增大而增大,当超过某一阈值,海表泡沫层近似黑体,发射率为1。由于月平均风速及波高忽略了某些极值事件,2003-01和2003-07的月平均风速最大值仅在8m/s左右,但是海表泡沫层对亮温仍存在一定的贡献,修正率最大值约为1.2%,未来工作会进一步关注风速和波高较大的极值事件中泡沫层对观测亮温的影响。
[Abstract]:Based on the foam dynamic model and the breaking wave model, the foam thickness of the Bohai Sea, Yellow Sea and East China Sea in 2003 is calculated by using the MASNUM wave model. The emissivity of the sea surface foam layer and the correction rate of the foam layer to the observed brightness temperature are obtained by using the multi-layer microwave radiation theory and the foam model. The results show that the thickness of foam layer is different in different seasons, which is related not only to wind speed but also to wavefront state. The surface emissivity of the foam layer increases with the increase of foam thickness. When a certain threshold is exceeded, the emissivity of the foam layer is similar to blackbody, and the emissivity is 1. Because the monthly average wind speed and wave height ignore some extreme events, the maximum monthly mean wind velocity in 2003 / 01 and 2003 / 07 is only about 8m/s, but the sea surface foam layer still has a certain contribution to the brightness temperature, and the maximum correction rate is about 1.2%. Future work will pay more attention to the influence of foam layer on observed brightness temperature in extreme events with high wind speed and wave height.
【作者单位】： 国家海洋局第一海洋研究所;海洋环境科学与数值模拟国家海洋局重点实验室;中国海洋大学;
【基金】：国家高技术研究发展计划项目——南海及周边海域风浪流耦合同化精细化数值预报与信息服务系统(2013AA09A506)
【分类号】：P731.2;P715.7
本文编号：2455723
[Abstract]:Based on the foam dynamic model and the breaking wave model, the foam thickness of the Bohai Sea, Yellow Sea and East China Sea in 2003 is calculated by using the MASNUM wave model. The emissivity of the sea surface foam layer and the correction rate of the foam layer to the observed brightness temperature are obtained by using the multi-layer microwave radiation theory and the foam model. The results show that the thickness of foam layer is different in different seasons, which is related not only to wind speed but also to wavefront state. The surface emissivity of the foam layer increases with the increase of foam thickness. When a certain threshold is exceeded, the emissivity of the foam layer is similar to blackbody, and the emissivity is 1. Because the monthly average wind speed and wave height ignore some extreme events, the maximum monthly mean wind velocity in 2003 / 01 and 2003 / 07 is only about 8m/s, but the sea surface foam layer still has a certain contribution to the brightness temperature, and the maximum correction rate is about 1.2%. Future work will pay more attention to the influence of foam layer on observed brightness temperature in extreme events with high wind speed and wave height.
【作者单位】： 国家海洋局第一海洋研究所;海洋环境科学与数值模拟国家海洋局重点实验室;中国海洋大学;
【基金】：国家高技术研究发展计划项目——南海及周边海域风浪流耦合同化精细化数值预报与信息服务系统(2013AA09A506)
【分类号】：P731.2;P715.7
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