Objective Estimation of Velocity Streamfunction Field with Discretely Sampled Oceanic Data 11: with Application of Least-square Regression Analysis

객관적 분석을 통한 속도 유선함수(streamfunction) 산출 II: 최소자승 회귀분석법의 응용

  • 조광우 (부경대학교 해양산업개발연구소)
  • Published : 1997.10.01

Abstract

A least-square regression analysis is applied for the estimation of velocity streamfunction field based on discretely sampled current meter data. The coefficients of a streamfuunction that is expanded in terms of trigonometric basis function are obtained by enforcing the horizontal non-divergence of two-dimensional flow field. This method avoids Interpolation and gives a root-mean-square (rms) residual of fit which Includes the divergent part and noisiness of oceanic data. The Implementation of the method Is done by employing a boundary-fitted, curvilinear orthogonal coordinate which facilitates the specification of boundary conditions. An application is successfully made to the Texas-Louisiana shelf using the 32 months current meter data (31 moorings) observed as a part of the Texas-Louisiana Shelf and Transport Processes Study (LATEX). The rms residual of the fitting is relatively small for the shelf, which indicates the field Is Ivell represented by the streamnfunction.

Keywords

Objective analysis;streamfunction;coastal circulation;ocean current

References

  1. Ph. D. Dissertation, Texas A&M University, College Station A generalized reduced-gravity ocean model: an application for short-term evolution and prediction of surface mesoscale fields Arango, H. G.
  2. User's guide for a three-dimensional, primitive equation, numerical ocean model Mellor, G. L.
  3. J. Geophys. Res. v.90 Advances in satellite sea surface temperature measurements and oceanographic application Njoku, D. W.;T. P. Barnett;R. M. Laurs;A. C. Vastano
  4. Numerical recipes Press, W. H.;B. P. Flannery;S. A. Teukolsky;W. T. Vettering
  5. Technical Proposal. Texas A&M University, Reference No. 93-06-T Louisiana/Texas Physical Oceanography Program Task A Nowlin, W. D. Jr.;A. E. Jochens;N. L. Guinasso Jr.;D. A. Wisenburg;R. O. Reid;S. A. Hsu;R. C. Hamilton
  6. J. Atmos. Oceanic Technol. v.2 Sea surface topography estimation with infrared satellite imaginary Vastano, A. C.;R. O. Reid
  7. Rev. Geophys. Space Phy. v.18 On using satellite altimetry to determine the general circulation of the ocean with application to geoid improvement Wunsch, C.;E. M. Gasposchkin
  8. Deep-Sea Res. v.23 A technique for objective analysis and design of oceanographic experiments applied to MODE-73 Bretherton, F. P.;R. E. Davis;C. B. Fandry
  9. J. Geophys. Res. v.98 The annual cycle of the western boundary current in the Gulf of Mexico Sturges, W.
  10. Proc. Symp. on Numerical Generation of Curvilinear Coordinate Systems and Their Use in the Numerical Solution of Partial Differential Equation Numerical grid generation Thompson, J. F.
  11. J. Kor. Environ. Sci. Soc. Objective estimation of velocity streamfunction with discretely sampled data Ⅰ: with application of Helmholtz theorem Cho, K.
  12. Circulation in the coastal ocean Csanady, G. T.
  13. J. Geophys. Res. v.100 Eddy-and wind-forced shelf circulation Oey, L.-Y.
  14. Ph. D. Dissertation, Texas A&M University, College Station Short interval prediction of surface motion on the Texas continental shelf Barron, C. N. Jr.
  15. J. Geophys. Res. v.91 Low-frequency circulation on the Texas-Louisiana continental shelf Cochrane, J. D.;F. J. Kelly