The Imaging of Fine Structure Using Seismic Reflection Method
Speaker: Via Ramadlona
Abstract
A joint seismic reflection and physical oceanographic study have been capable to investigate oceanic fine structure. Finestructure is the label for larger features where the stratification limits the motion to the horizontal plane. Oceanic fine structure commonly develops at boundaries between different water masses. The observations are conducted in east of Japan demonstrate the utility of seismic reflection method in mapping oceanic fine structure of the Kuroshio current. For the seismic reflection data was used the MCS data. Expendable bathythermograph (XBT), expendable conductivity-temperature-depth (XCTD) and expendable current profiler (XCP) data were also conducted to obtain vertical profiles of water properties during acquisition of the MCS data. In this study, event of seismic reflection is correlate with temperature and salinity changes in the water column. The temperature and salinity were using calculated a synthetic seismograms. The synthetic seismograms match quite well with the MCS data that the large amplitude events and depth correlate well of both. It is indicated that the reflection in the MCS section reflect true oceanic structure in the water column.
Reference
Nakamura, Y., Noguchi, T., Tsuji, T. et al. 2006. Simultaneous seismic reflection and physical oceanographic observations of oceanic fine structure in the Kuroshio extention front. Geophysical Research Letters, 33. L23605, doi:10.1029/2006GL027437
Osborn, T.R. 1998. Finestructure, microstructure, and thin layer, Oceanography, II (1), 36-43.
Tsuji, T., Noguchi, T., Niino, H. Et al. 2005. Two-dimensional mapping of fine stuctures in the Kuroshio Current using seismic reflection data. Geophysical Research Letters, 32. L14609, doi:10.1029/ 2005GL023095.