Reply to comment by Paul A. Hwang on 'A study of the slopeprobability density function of the ocean waves from radar observations' by D. Hauser et al.

摘要

In their study, Hauser et al. [2008] (hereinafter referredto as HCGM08) presented an analysis of the mean .square slope (mss) of ocean waves as estimated from C-band radar observations at small incidence. A large part of the paper was devoted to the analysis of the relationship between mss and wind speed as obtained from radar observations, and to comparisons with various former results presented in the literature. In his comment, Hwang [2009] criticizes the fact that HCGM08 did not take into account in their analysis, the presence of background long waves. In particular Hwang [2009] suggests that the discrepancy between the results of HCGM08 and those of Hwang [2005] (hereinafter referred to as H05) could be due to the presence of long waves. Therefore, in this Reply we reanalyze our data by sorti~g them according to sea state conditions. We first present III section 2 the sea state conditions and separate our conditions in three classes (swell, pure wind sea, mixed sea with dominating wind sea part). We then reanalyze in section 3.1 o~ mss results sorted according these different sea state conditions. In section 3.2, we compare these results with those of H05 taking into account the apparent cutoff wave number associated with our radar observation conditions. Finally, we conclude in section 4.