Preprints
https://doi.org/10.5194/egusphere-2022-252
https://doi.org/10.5194/egusphere-2022-252
 
28 Apr 2022
28 Apr 2022
Status: this preprint is open for discussion.

Technical note: On seasonal variability of the M2 tide

Richard Ray Richard Ray
  • Geodesy & Geophysics Lab., NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Abstract. Seasonal variability of the M2 ocean tide can be detected at many ports, perhaps most. Examination of the cluster of tidal constituents residing within the M2 tidal group can shed light on the physical mechanisms underlying seasonality. In broadest terms these are astronomical, frictional/advective interactions, and climate processes; some induce annual modulations, some semiannual, in amplitude, phase, or both. This note reviews how this occurs and gives an example from each broad category. Phase conventions and their relationship to causal mechanisms, as well as nomenclature, are also addressed.

Richard Ray

Status: open (until 23 Jun 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2022-252', Haidong Pan, 01 May 2022 reply
  • RC1: 'Comment on egusphere-2022-252', Qian Yu, 15 May 2022 reply

Richard Ray

Richard Ray

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Short summary
Seasonal variability of the M2 ocean tide can be detected at many ports. The physical mechanisms underlying seasonality, in broadest terms, are astronomical, frictional/advective interactions, and climate processes. Some of these induce annual modulations, some semiannual, in amplitude, phase, or both. This note reviews how this occurs and gives an example from each broad category. Phase conventions and their relationship to causal mechanisms, as well as nomenclature, are also addressed.