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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제38권 제2호
- 발행연도
- 2014.2
- 수록면
- 208 - 216 (9page)
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초록· 키워드
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In case of any coastal ocean near the mouth of huge rivers, low salinity water can be formed due to its large amount of freshwater discharge. For the acoustic analysis on the low salinity environment, some oceanographic data of the East China Sea and the Atlantic Ocean were collected through KODC (Korea Oceanographic Data Center) and NODC (National Oceanographic Data Center) online service. In this paper, the T-S gradient diagram is introduced to show a relation between the gradients of temperature and salinity in view of acoustic surface channel formation. Existence of haline channel, quantitative contribution of gradients of salinity and temperature, effectiveness of the channel formation can be known by the T-S gradient diagram. After applying the collected data into the diagram, tropical regions of the Atlantic Ocean show strong haline channel due to its nearly invariant temperature and drastic change of salinity with depth. The averaged transmission loss in the channel is about 5.7 ~ 7.5 dB less than that out of the channel by the results of acoustic propagation model (RAM: Range independent Acoustic Model). On the other hand, the East China Sea and temperate region of the Atlantic ocean have weaker haline channel with less difference of the averaged transmission loss between in and out of the channel as 3.2 ~ 6.0 dB. Although data samples used in this study have limitation to represent the general physical structures of the three ocean regions, the T-S gradient diagram is shown to be useful and acoustic field affected by low salinity environment is investigated in this study.
목차
Abstract
1. Introduction
2. Data
3. Methodology
4. Results
5. Conclusion
References
참고문헌 (14)
참고문헌 신청
1. [학술지(정기간행물)] - TVS Udaya Bhaskar / 2008 / Seasonal Variability of Sonic Layer Depth in the Central Arabian Sea / Ocean Science Journal 43 (3) : 147 ~ 152
2. [학술지(정기간행물)] - J. Salisbury / 2011 / Spatial and tem-poral coherence between Amazon River discharge, salinity, and light absorption by colored organic carbon in western tropical Atlantic surface wa-ters / Journal of Geophysical Research 116 (C00H02) : 1 ~ 14
3. [학술지(정기간행물)] - E. D. Palma / 2004 / A numerical study of the Southwestern Atlantic Shelf circulation: Barotropic response to tidal and wind forcing / Journal of Geophysical Research 109 (C08014) : 1 ~ 17
4. [학술지(정기간행물)] - N. S. Banas / 2009 / The Columbia River plume as cross-shelf exporter and along-coast barrier / Continental Shelf Research 29 : 292 ~ 301
5. [학술지(정기간행물)] - R. C. Beardsley / 1985 / Discharge of the Changjiang(Yangtze River)into the East China Sea / Continental Shelf Research 4 (1) : 57 ~ 76
2. [학술지(정기간행물)] - J. Salisbury / 2011 / Spatial and tem-poral coherence between Amazon River discharge, salinity, and light absorption by colored organic carbon in western tropical Atlantic surface wa-ters / Journal of Geophysical Research 116 (C00H02) : 1 ~ 14
3. [학술지(정기간행물)] - E. D. Palma / 2004 / A numerical study of the Southwestern Atlantic Shelf circulation: Barotropic response to tidal and wind forcing / Journal of Geophysical Research 109 (C08014) : 1 ~ 17
4. [학술지(정기간행물)] - N. S. Banas / 2009 / The Columbia River plume as cross-shelf exporter and along-coast barrier / Continental Shelf Research 29 : 292 ~ 301
5. [학술지(정기간행물)] - R. C. Beardsley / 1985 / Discharge of the Changjiang(Yangtze River)into the East China Sea / Continental Shelf Research 4 (1) : 57 ~ 76
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UCI(KEPA) : I410-ECN-0101-2015-550-001286988