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基于浮标轨迹的涡旋信息提取算法

DOI: 10.3724/SP.J.1047.2015.01207, PP. 1207-1214

Keywords: 涡旋,瞬时状态,复杂结构,轨迹,识别

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Abstract:

浮标在运动过程中如果受到涡旋的影响,会回到之前某一时刻所在的位置,其轨迹中就会出现环状结构,故提取浮标轨迹中的环状结构,就可识别涡旋。鉴此,本文针对ALIS(ASimpleAutomatedLoopIdentifyingScheme)算法忽略了这一环状结构中出现的“复杂结构”之不足予以改进,提出了基于浮标轨迹回环结构的涡旋及其移动轨迹提取算法AILIS(AnImprovedAutomatedLoopIdentifyingScheme)算法。其通过判断环状结构中的轨迹片段是否有自相交对“复杂结构”进行处理,使提取结果更加完善;在此基础上,该算法通过判断涡旋瞬时状态的相似性,可追踪涡旋的部分移动轨迹。本文通过与ALIS算法及其他相关算法结果的对比,并使用SLA数据及HD(HybridDetection)、HT(HybridTracking)算法实验结果表明,本文提出的算法能得到更多的海洋涡旋的瞬时状态和移动轨迹,为获取涡旋的物理参数提供重要的途径。

References

[1]  Robinson A R. Eddies in marine science[M]. Berlin, Heidelberg: Springer-Verlag, 1983.
[2]  Adams D K, Mcgillicuddy D J, Zamudio L, et al . Surface-generated mesoscale eddies transport deep-sea products from hydrothermal vents[J]. Science, 2011,332(6029):580-583.
[3]  Shoosmith D R, Richardson P L, Bower A S, et al . Discrete eddies in the northern North Atlantic as observed by looping RAFOS floats[J]. Deep-Sea Res, 2005,52:627-650.
[4]  Fratantoni D M, Richardson P L. The evolution and demise of North Brazil Current Rings[J]. Journal of Physical Oceanography, 2006,36:1241-1264.
[5]  Morrow R, Birol F, Griffin D, et al . Divergent pathways of cyclonic and anti-cyclonic ocean eddies[J]. Geophysical Research Letters, 2004,31(24):1-5.
[6]  Chaigneau A, Gizolme A, Grados C. Mesoscale eddies off Peru in altimeter records: Identification algorithms and eddy spatio-temporal patterns[J]. Progress in Oceanography, 2008,79(2):106-119.
[7]  Chelton D B, Schlax M G, Samelson R M. Global observations of n-onlinear mesoscale eddies[J]. Progress In Oceanography, 2011,91:167-216.
[8]  Chaigneau A, Pizarro O. Eddy characteristics in the eastern South Pacific[J]. Journal of Geophysical Research: Oceans, 2005,110(C6):1978-2012.
[9]  Griffa A, Lumpkin R, Veneziani M. Cyclonic and anticyclonic motion in the upper ocean[J]. Geophysical Research Letters, 2008,35(1):1-5.
[10]  Lilly J M, Olhede S C. Bivariate instantaneous frequency and bandwidth[J]. Signal Processing, IEEE Transactions on, 2010,58(2):591-603.
[11]  Lilly J M, Scott R K, Olhede S C. Extracting waves and vortices from Lagrangian trajectories[J]. Geophysical Research Letters, 2011,38(23):1-8.
[12]  Beron-Vera F J, Olascoaga M J, Goni G J. Oceanic mesoscale eddies as revealed by Lagrangian coherent structures[J]. Geophysical Research Letters, 2008,35(12):1-7.
[13]  Dong C, Liu Y, Lumpkin R, et al . A scheme to identify loops from trajectories of oceanic surface drifters: an application in the Kuroshio extension region[J]. Journal of Atmospheric and Oceanic Technology, 2011,28(9):1167-1176.
[14]  Li J X, Zhang R, Jin B G. Eddy characteristics in the northern South China Sea as inferred from Lagrangian drifter data[J]. Ocean Science, 2011,7(5):661-669.
[15]  Boebel O, Lutjeharms J, Schmid C, et al . The Cape Cauldron: A regime of turbulent inter-ocean exchange[J]. Deep Sea Research Part II: Topical Studies in Oceanography, 2003,50(1):57-86.
[16]  Meng L, Huang C, Zhao C, et al . An improved Hilbert curve for parallel spatial data partitioning[J]. Geo-spatial Information Science, 2007,10(4):282-286.
[17]  Lumpkin R, Pazos M. Measuring surface currents with surface velocity program drifters: The instrument, its data, and some recent results[C]. In: Griffa A, Kirwan A D, Mariano A, Özgökmen T, Rossby T (eds). Lagrangian Analysis and Prediction of Coastal and Ocean Dynamics, 2007,39-67.
[18]  Yi J, Du Y, He Z, et al . Enhancing the accuracy of automatic eddy detection and the capability of recognizing the multi-core structures from maps of sea level anomaly[J]. Ocean Science, 2014,10(1):39-48.

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