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conferenceseries
.com
Volume 8, Issue 10 (Suppl)
J Earth Sci Clim Change, an open access
ISSN: 2157-7617
Climate Change 2017
October 19-21, 2017
CLIMATE CHANGE
October 19-21, 2017 | Rome, Italy
4
th
World Conference on
Impacts of rising sea water temperature on underwater acoustic propagationin the upper layer of the
East Sea of Korea
Sehan Lim
and
Minki Cheon
Naval Academy, South Korea
T
he temperature of the sea is constantly rising due to global warming. In the case of the East Sea of Korea, sea water
temperature has risen about 1℃ over the past 100 years. The rise in sea water temperature in the upper layer is larger than
that of the lower layer, and the rise will accelerate more and more over the year. The factors influencing sound velocity in
underwater are seawater temperature, salinity, and pressure, which is especially affected by sea water temperature (as seawater
temperature rises by 1℃, sound velocity is about 3 ㎧ faster). Thus, the change in seawater temperature causes the change in
sound velocity which has mainly effect on underwater acoustic propagation pattern. Underwater sounds are widely used in
various fields of the ocean such as echo depth sounder, oceanographic survey, resource exploration, biological signal and
noise measurement, navigation, communication. In the Navy, it is used in the acoustic-based naval weapon systems those are
a passive and active sonar, torpedoes, mines and etc. The study shows how the rise of sea water temperature caused by global
warming affects the underwater acoustic transmission in the upper layer of the East Sea of Korea.
Biography
Sehan Lim is working as anAssociate professorin Department of Oceanography ofRepublic of Korea Naval Academy. He graduated from Korea Naval Academy
and completed his PhD from School of Earth and Environmental Science in Seoul National University of Korea. His research areas are meso-scale ocean
circulation, mixed layer depth and underwater acoustics.
sehan.lim@gmail.comSehan Lim et al., J Earth Sci Clim Change 2017, 8:10(Suppl)
DOI: 10.4172/2157-7617-C1-037