报告开始:暂无开始时间(Asia/Shanghai)
报告时间:暂无持续时间
所在会场:[暂无会议] [暂无会议段]
暂无文件
Wind-forced near-inertial waves (NIWs) transfer atmospheric energy into the ocean interior. Observations over the North Atlantic Mid-Ocean Ridge show that this pathway can be strongly suppressed, even in anticyclonic vorticity that typically favors downward radiation. In this study, we provide observational evidence that such surface trapping of NIWs is associated with eddy-driven Doppler shift (\(\omega_i=\omega_{obs}-\mathbf{k} \cdot \mathbf{u}\)) using nine-month mooring measurements in the mid-Atlantic ridge. The two longest energetic stages were strongly surface trapped: only 18.06% and 32.14% of near-inertial kinetic energy (NIKE) penetrated below the mixed layer, despite persistent negative vorticity and weak horizontal propagation. Scale-dependent wind work and modal decomposition show that compact 300-600 km wind forcing excited higher-mode NIWs, with modes 2-4 accounting for approximately 70% and 71% of total NIKE in Stages 1 and 2, respectively. These large horizontal wavenumbers amplified the Doppler-shift effect of eddy-induced vertical shear, lowering their mean intrinsic frequencies relative to \(f_{\mathrm{eff}}\) by 0.0114f and 0.0785f, thereby inhibiting downward propagation and redirecting wind-injected near-inertial energy toward the upper ocean. Our study highlights an eddy-mediated control on the delivery of wind-injected near-inertial energy to depth, with implications for estimates of the energy available for deep-ocean mixing.
01月12日
2027
01月15日
2027
初稿截稿日期
注册截止日期
2024年12月11日 中国
第七届厦门海洋环境开放科学大会(XMAS 2025)2023年01月09日 中国 Xiamen
第六届厦门海洋环境科学开放大会
发表评论