Simulation of Present-Day Climate Over the Indian Subcontinent by General Circulation Models

S-wave amplitude data from the Taiwan Telemetered SeismographicNetwork(TTSN)and the Central Weather Bureau Seismographic Network(CWBSN)are used in a tomographical inversion for a three-dimensional S-wave attenuation structure beneath the Taiwan area.The data consist ofthree-dimensional,digital seismograms of 137 earthquakes with magnitudesbetween 3.0 and 5.0.The S-wave attenuation structure is obtained throughthe use of the damped least-squares method from attenuation time value(t(superscript *))and travel times.Attenuation time value is calculated by using the spectral decay method under the assumption that t(superscript *)is independent of frequency.S-wave spectra are corrected for a ω^(2)source spectrum model.The frequencies of instrument response above 25 Hz or below 4 Hz usually havelarge uncertainty.Therefore,the least-squares line fitting is performed inthe frequency band of 4 to 25 Hz.The results here show that the distribution pattern of the Q(subscript s)values in the Taiwan area correlates well with seismicity.In the upper crust(depths of between 0 to 15 km),the region oflower Q(subscript s)area correlates with higher seismicity.However,in the lower crustand upper mantle(15 to 75 km),the area of higher seismicity correlateswith the regions of higher Q(subscript s)values.

並列關鍵字

Global Climate Models ； Control Experiments ； Regional Climates ； Indian Subcontinent ； Monsoon

國際替代計量

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