Open AccessThe tidal dynamics of the Irish and Celtic Seas
Author(s) -
Robinson I. S.
Publication year - 1979
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1979.tb04774.x
Subject(s) - current meter , energy flux , celtic languages , geology , tide gauge , current (fluid) , flux (metallurgy) , altimeter , submarine pipeline , forcing (mathematics) , energy budget , harmonics , energy current , inflow , climatology , geodesy , meteorology , oceanography , energy (signal processing) , sea level , geography , physics , archaeology , materials science , astronomy , voltage , quantum mechanics , metallurgy , thermodynamics
Summary. Current meter data collected over periods of more than 14 day from the Irish and Celtic Seas are harmonically analysed and presented in maps of tidal stream information. Making use of the analysed current data, and by constructing time series of frictional and inertial stresses which are also harmonically analysed, harmonic constituents of the surface tidal slopes at current meter stations are obtained. Using these with data collected from offshore tide gauges, and in conjunction with coastal tide data, cotidal maps are drawn with some confidence for M 2 , S 2 , O 1 and K 1 , the M 2 chart resolving the discrepancy which exists between the different charts of the Celtic Sea already produced. Cotidal maps for M 3 and M 4 are also presented. The mean over a tidal cycle of the energy flux for M 2 , S 2 and O 1 is also presented in the form of the total energy flux in these constituents which crosses different sectional lines. A flux of 44 × 10 6 kW is observed to enter the Celtic Sea from the Atlantic and this is compared with previous estimates. An energy budget is also performed for M 2 , including all the effects of astronomical forcing and Earth tides to enable comparison to be made between the true energy inflow and the estimated frictional dissipation. Finally, comparison is made between the mean of the instantaneous energy flux and the sum of the energy fluxes associated with the major harmonics.