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利用Argo高分辨率温盐数据和海面高度异常(SLA)数据对湾流区中尺度涡内外的混合情况进行了统计分析,结果表明,平均情况下300~540 m深度处反气旋涡内的混合率明显高于背景场,平均值量级达到4.0×10-5 m2 s-1,而涡外和气旋涡内平均混合率分别为1.6×10-5和0.8×10-5m2 s-1.反气旋涡内混合率量级在10-4 m2 s-1以上的概率达到29%,而涡外和气旋涡内情况下达到10-4 m2 s-1以上的概率仅为12%和5%.540~900 m深度上,涡内外的平均混合率量级一致.38个反气旋涡中有24个出现涡内部混合增强的现象,其中22个涡内剖面在观测时间前局地有大风过程存在或持续,混合情况与风应力有较好的对应关系,说明反气旋涡利于风生近惯性能量的下传.12个反气旋涡内剖面在540 m以下部分仍存在Thorpe尺度在5 m以上的水体翻转,甚至有3个达到了20 m以上,说明强混合现象在某些区域540 m以下的较深层仍然存在.
Based on the data of Argo high-resolution temperature and salinity data and sea level anomaly (SLA) data, the mixing situation of the mesoscale vortex in the Gulfstream is analyzed statistically. The results show that the mixing rate in the anti-cyclone vortex at an average depth of 300-540 m Significantly higher than that of the background field with an average magnitude of 4.0 × 10-5 m2 s-1, while the average mixing rates in the vortex and vortex vortex are 1.6 × 10-5 and 0.8 × 10-5m2 s-1, respectively. The probability of the internal mixing rate above 10-4 m2 s-1 is 29%, while the probability of reaching 10-4 m2 s-1 in the case of vortex and vortex is only 12% and 5% respectively. m depth, the average mixing rate was the same on the inside and outside of the vortex.Among 24 of the 38 anti-cyclone vortices, the mixed phenomenon of vortex internal mixing was enhanced, of which, 22 vortexes inside the vortex appeared or persisted before the observation time, There is a good correspondence between the mixing and wind stress, indicating that the anti-cyclonic vortex is beneficial to the downstream wind-induced inertial energy transfer. In the 12 inner-vortex vortex sections below 540 m, there is still water body overturning with Thorpe scale over 5 m, Even three of them reach more than 20 m, indicating that the strong mixing phenomenon still exists in deeper layers below 540 m in some areas.