Haidong Pan , Fei Teng , Junchuan Sun , Tengfei Xu , Zexun Wei
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引用次数: 0
Abstract
S2 ocean tide, as one of the most important semi-diurnal constituents, is composed of astronomical S2 tide originated from gravitational forcing and radiational S2 tide derived from solar radiation. Although there are lots of researches which have explored the features of radiational S2 tides in the globe, less known and less discussed, are the radiational S2 tides in the East China Sea due to lack of water level observations. In present study, radiational S2 tides in the East China Sea are estimated and discussed via the combination of 39 coastal tide gauges and EOT20 tidal model derived from multi-satellite altimeter records. We find that radiational S2 tides obtained from tide gauges and satellite-derived EOT20 model are roughly consistent in the East China Sea: (1) The largest radiational S2 amplitude can be as high as 14 cm. (2) Radiational and astronomical S2 tidal amplitudes are large in the coastal zones but small in the open sea. (3) Radiational S2 amplitudes are ∼12% of astronomical S2 amplitudes while phase differences between radiational and astronomical S2 tides are ∼114°. The inconsistency between coastal tide gauges and EOT20 model in coastal zones should be induced by the temporal evolution of tides and the inaccuracy of satellite altimeter observations in this region. Furthermore, the methods used in the East China Sea can be easily applied to other sea areas, except diurnal resonant sea areas where the smooth nature of semi-diurnal admittances may be corrupted by nonlinear interactions between anomalously large diurnal tides.
期刊介绍:
Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include:
Physical sedimentology and geomorphology
Geochemistry of the coastal ocean (inorganic and organic)
Marine environment and anthropogenic effects
Interaction of physical dynamics with natural and manmade shoreline features
Benthic, phytoplankton and zooplankton ecology
Coastal water and sediment quality, and ecosystem health
Benthic-pelagic coupling (physical and biogeochemical)
Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles
Estuarine, coastal and shelf sea modelling and process studies.