中国物理B ›› 2010, Vol. 19 ›› Issue (2): 24101-024101.doi: 10.1088/1674-1056/19/2/024101
William Perrie1, 谢涛2, 何超2, 旷海兰2, 邹光辉2, 陈伟2
Xie Tao(谢涛)a)†, He Chao(何超)a), William Perrieb), Kuang Hai-Lan(旷海兰)a), Zou Guang-Hui(邹光辉)a), and Chen Wei(陈伟)a)
摘要: In recent years, linear fractal sea surface models have been developed for the sea surface in order to establish an electromagnetic backscattering model. Unfortunately, the sea surface is always nonlinear, particularly at high sea states. We present a nonlinear fractal sea surface model and derive an electromagnetic backscattering model. Using this model, we numerically calculate the normalized radar cross section (NRCS) of a nonlinear sea surface. Comparing the averaged NRCS between linear and nonlinear fractal models, we show that the NRCS of a linear fractal sea surface underestimates the NRCS of the real sea surface, especially for sea states with high fractal dimensions, and for dominant ocean surface gravity waves that are either very short or extremely long.
中图分类号: (Upper ocean and mixed layer processes)