해류 수직구조를 파악하기 위한 LADCP Casting 및 자료처리 방법
Casting Lowered-ADCP and Data Processing Methods for Configuring Vertical Current Structure
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조회
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다운로드
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참고문헌
키워드
초록
To understand the vertical structure of ocean currents from raw data observed by lowered-ADCP (LADCP), these data require post-processing. Data were processed using Krahman's version 10.8 processing software based on Matlab. It is estimated the influence of auxiliary data affecting the processed current structure. The bottom-tracked velocities and the GPS information significantly contribute the offset on reference velocities in the bottom layer and barotropic ones in the middle layer, respectively. Good quality data can be obtained when LADCP is least tilted in pitch and roll during observation. In situ application of LADCP to the (northward) volume transports of Kuroshio in the East China Sea proved to be 24.8. Sv (= 1×106 m3s−1) in October 2007, and 28.2 Sv in June 2008, respectively. The volume transport is relatively large over the continental slope when compared to the shelf or the deep sea.
Abstract
To understand the vertical structure of ocean currents from raw data observed by lowered-ADCP (LADCP), these data require post-processing. Data were processed using Krahman's version 10.8 processing software based on Matlab. It is estimated the influence of auxiliary data affecting the processed current structure. The bottom-tracked velocities and the GPS information significantly contribute the offset on reference velocities in the bottom layer and barotropic ones in the middle layer, respectively. Good quality data can be obtained when LADCP is least tilted in pitch and roll during observation. In situ application of LADCP to the (northward) volume transports of Kuroshio in the East China Sea proved to be 24.8. Sv (= 1×106 m3s−1) in October 2007, and 28.2 Sv in June 2008, respectively. The volume transport is relatively large over the continental slope when compared to the shelf or the deep sea.
참고문헌 (20)
- Andres M, "Observations of Kuroshio flow variations in the East China Sea", J Geophys Res, 113, pp.C05013~ (2008)[DOI]
- Beardsley RC, "Discharge of the Changjiang (Yangtze River) into the East China Sea", Cont Shelf Res, 4(1), pp.57~76 (1985)
- Casal TGD, "A North Atlantic deep-water eddy in the Agulhas Current system", Deep- Sea Res II, 53, pp.1718~1728 (2006)
- Firing E, "Lowered ADCP Developments and Use in WOCE", WOCE Newsletter, 30, pp.10~14 (1998)
- Fisher J, "Deep Velocity Profiling with Self-contained ADCPs", J Atmos Ocean Tech, 10, pp.764~773 (1993)
- Guo X, "The Kuroshio Onshore Intrusion along the Shelf Break of the East China Sea: The Origin of the Tsushima Warm Current", J Phys Oceanogr, 36, pp.2205~2231 (2006)
- Ichikawa H, "The current system in the Yellow and East China Sea", J Oceanogr, 58, pp.77~92 (2002)
- Komaki K, "Correction method for fulldepth current velocity with lowered acoustic Doppler current profiler (LADCP)", J Oceanogr, 63, pp.995~1007 (2008)
- "Lowered ADCP users group"[URL]
- Kune E, "Global Abyssal Mixing Inferred from Lowered ADCP Shear and CTD Strain Profiles", J Phys Oceanogr, 36, pp.1553~1576 (2006)
- Park YH, "Internal tides and vertical mixing over the Kerguelen Plateau", Deep-Sea Res II, 55, pp.582~593 (2008)
- Polzin K, "The Finescale Response of Lowered ADCP Velocity Profiles", J Atmos Ocean Tech, 19, pp.205~224 (2002)
- RDI, "Acoustic Doppler Current Profiler: principles of operation a practical primer", pp.52~ (1996), RDI Instruments
- Rhein M, "Transport of South Atlantic water through the passages south of Guadeloupe and across 16oN 2000-2004", Deep-Sea Res I, 52, pp.2234~2249 (2005)
- Song J, "A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea", Chinese J Ocean Limnol, 29(2), pp.446~459 (2011)
- "LADCP Processing"[URL]
- Thurnherr AM, "Hydrography and flow in the Lucky Strike segment of the Mid-Atlantic Ridge", J Marine Res, 66, pp.347~372 (2008)
- Torres DJ, "A Comparison of LADCP and CTD Performance on a Slide-Down-Wire Frame Versus a Standard CTD Frame", OCEANS 2000 MTS, 2000, 359~366
- Visbeck M, "Deep velocity profiling using lowered Acoustic Doppler Current Profilers: bottom track and inverse solutions", J Atmos Ocean Tech, 19, pp.794~807 (2002)