The effect of normal and abnormal eddies on the mixed layer depth in the global ocean

• DOI: 10.3389/fmars.2022.981505
• Publication Date: 2023-01-13T06:28:15Z
• Authors: Ji Hao; Jie Yang; Ge Chen
• Keywords: Eddy; Anticyclone; Argo

Mesoscale eddies are broadly distributed over the global ocean and play a significant role in modulating spatiotemporal evolution of mixed layer depth (MLD). The presence abnormal has been shown; however, precise quantification effect on MLD, given case eddies, not carried out thus far. Differently from previous approach to identify through sea surface temperature, we therefore, proposed method using potential density based Argo data (Array for Real-time Geostrophic Oceanography) 15 years 2003 2017. Results showed that anticyclonic (AAE) cyclonic (ACE) accounted 21.67% 20.17% total matching (TAE) (TCE), respectively, ocean. proportions were relatively higher tropical regions but lower with boundary current strong eddy kinetic energy. MLD changes caused by normal estimated combining satellite altimetry data. removal separately called (NAE) (NCE). overall influence NAE (NCE) was more deepening (uplifting) than TAE (TCE). Globally, changed ~66 m (~54 m) ~67 (~53 exhibited pronounced change Indian Ocean sector Southern region, ~111 (~94 ~115 (~92 winter. AAE (ACE), exerted weak opposite (uplifting). In other words, average them shoaled (deepened) ~59 (~59 m), North Pacific ~61 (~47 ~49 (~57 Given above results, should be when impact is evaluated climate system.