基于2012年7月13日-20日夏季琼东海域的断面调查资料,研究了琼东急流锋面空间分布特征、混合过程及其参数化.结果表明,夏季琼东陆架海急流锋面主要分布在50 m ~100 m等深线之间,且100 m等深线附近的锋面为强锋面区.强温盐锋面主要发生在25 m以浅,最大的强度锋面出现在14 m左右.锋区混合率的最大量级10-3 m2 ·s-1,约比大洋平均值高2个量级,且高值主要分布在锋轴线附近和接近海表处.所提出的混合率参数化方案可以较好描述夏季琼东陆架海锋区混合的主要特征.%With in-situ dataset of the cross-shelf sections on the continental shelf east of Hainan Island from 13 to 20 July 2012, the spatial features of the jet front, the frontal mixing process and its parametric study in the same area were performed. The results show that the jet front in summer is mainly distributed between the 50-m and 100-m isobath. There is a strong frontal zone along the 100-m isobath. Strong thermal and salinity fronts mainly occur above 25 m depth whereas the strongest fronts appears above 14 m depth. The maximum vertical eddy diffusivity of O (10-3) m2?s-1 in the frontal zone is about two orders of magnitude higher than the ocean average. Moreover, the high value of mixing rate is mainly distributed near the front axis and the sea surface. The proposed parameterization model of frontal mixing could well describe the mixed features of the frontal zone east of Hainan Island in summer.
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