HR: 16:15h
AN: OS52I-08    [PDF]
TI: Data assimilation studies of the wind-driven coastal ocean circulation off Oregon
AU: * Kurapov, A L
EM: kurapov@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Allen, J S
EM: jallen@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Egbert, G D
EM: egbert@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Miller, R N
EM: miller@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Kosro, P M
EM: kosro@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Levine, M D
EM: mlevine@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Boyd, T
EM: tboyd@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Barth, J A
EM: barth@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AU: Moum, J N
EM: moum@coas.oregonstate.edu
AF: COAS, Oregon State University, 104, Ocean Adm. Bldg., Corvallis, OR 97331-5503 United States
AB: Velocity measurements from Acoustic Doppler Profiler (ADP) moorings are assimilated into the primitive equation Princeton Ocean Model to provide a description of the three-dimensional and time-varying flow dynamics on the Oregon shelf for the period of the CoOP COAST upwelling field experiment, May-August 2001. Objectives include establishing the alongshore spatial scales of influence of assimilated data and determining the effect of assimilation of velocity measurements on the other dynamical fields of interest, e.g., sea surface height, density, and turbulence dissipation rate. The efficiency of the data assimilation is shown to be dependent on the placement of the ADP moorings. During the upwelling season, the model correction can be advected southward with the mean currents or propagated northward with coastal trapped waves. Assimilation of measurements from one or two moorings on the path of the upwelling jet is found to help improve the model prediction at an alongshore distance of 90 km in both the northward and southward directions. In support of the COAST project goals, data assimilative solutions are analyzed to provide estimates of the across-shelf transport and upwelling fluxes over complicated bathymetry on the Oregon shelf and to determine spatial regions and times of occurrence of higher turbulent bottom stresses. Data assimilation is shown to strongly influence the magnitude and distribution of these dynamical variables.
DE: 3337 Numerical modeling and data assimilation
DE: 4219 Continental shelf processes
DE: 4255 Numerical modeling
DE: 4263 Ocean prediction
DE: 4279 Upwelling and convergences
SC: Ocean Sciences [OS]
MN: 2004 Ocean Sciences Meeting