This paper by R. E. Vankevich et al. presents a new configuration of the NEMO model for the Gulf of Finland (GoF) with two horizontal resolutions: 0.5 km and 2 km. The authors highlight the impact of higher resolution on the model's performance and discuss the parameterization of convective processes in the thermocline. The reviewer finds the topic highly relevant and timely, given the increasing computational power and the importance of sub-mesoscale motions in the upper mixed layer. However, the reviewer suggests significant revisions before publication, particularly in the discussion section, which is deemed too shallow. The reviewer also requests additional figures, clarifications on model setups, and more detailed discussions on sub-mesoscale processes, such as eddy-induced transports and their impact on offshore water exchange. Minor corrections and improvements in language and formatting are also recommended.This paper by R. E. Vankevich et al. presents a new configuration of the NEMO model for the Gulf of Finland (GoF) with two horizontal resolutions: 0.5 km and 2 km. The authors highlight the impact of higher resolution on the model's performance and discuss the parameterization of convective processes in the thermocline. The reviewer finds the topic highly relevant and timely, given the increasing computational power and the importance of sub-mesoscale motions in the upper mixed layer. However, the reviewer suggests significant revisions before publication, particularly in the discussion section, which is deemed too shallow. The reviewer also requests additional figures, clarifications on model setups, and more detailed discussions on sub-mesoscale processes, such as eddy-induced transports and their impact on offshore water exchange. Minor corrections and improvements in language and formatting are also recommended.