Browsing Thompson, Keith R. by Issue Date
Now showing items 1-20 of 26
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Return periods of extreme sea levels from short records
Extreme sea levels usually arise from a combination of the tides (assumed here to be deterministic) and storm surges (assumed stochastic). The authors show how tide and surge statistics derived from short (~1 year) records ... -
Low-Frequency Fluctuations in the Strait of Gibraltar from Medalpex Sea-Level Data
No abstract available. -
The detection of coastal-trapped waves
The authors outline a simple method for estimating the cross-spectral matrix of coastal-trapped wave amplitudes, A, from a set of oceanographic observations. Specifically, they propose that A may be estimated by ... -
A description of water types on the Mackenzie Shelf of the Beaufort Sea during winter
For a number of years during the 1980s, observations of the physical and chemical properties of seawater in the southeastern Beaufort Sea have been acquired in late winter. The most complete data set, from 1987, has been ... -
A modified galerkin-spectral model for three-dimensional, barotropic, wind-driven shelf circulation
The authors describe an efficient numerical scheme for calculating wind-driven currents on the continental shelf. Our scheme is based on the spectral approach introduced by Heaps and subsequently modified by Lardner. The ... -
Surface heat flux, horizontal advection, and the seasonal evolution of water temperature on the Scotian Shelf
Seasonal temperature variations on the Scotian Shelf penetrate to a depth of about 75 m. The net surface heat flux (Q) can explain about 85% of the annual cycle in the rate of change of mean temperature over this depth ... -
The adjoint method of data assimilation used operationally for shelf circulation
A real-time shelf circulation model with data assimilation has been successfully used, possibly for the first time, on the outer Nova Scotian Shelf, The adjoint method was used to infer the time histories of flows across ... -
Extraction of tidal streams from a ship-borne acoustic Doppler current profiler using a statistical-dynamical model
We present a method for extracting the barotropic tide directly from the time-space series of horizontal velocity obtained by a ship-borne acoustic Doppler current profiler (ADCP). The method is conceptually straightforward, ... -
A robust method for diagnosing regional shelf circulation from scattered density profiles
We present a straightforward method for estimating surface circulation on an f plane from a set of irregularly spaced vertical density profiles. The first step is to express bottom density rho(h) as the sum of a mean for ... -
Subtidal circulation on the Scotian Shelf: assessing the hindcast skill of a linear, barotropic model
Currents measured during the winter of 1985-1986 by four moorings on the inner Scotian Shelf are used to assess the hindcast skill of a three-dimensional circulation model forced by local wind stress and coastal sea level. ... -
A model of the circulation on the outer Scotian shelf with open boundary conditions inferred by data assimilation
The circulation on Western Bank is described using data collected in spring 1991 and 1992 as part of an interdisciplinary study of the early life history of Atlantic cod (Gadus morhua). The mean circulation over the crest ... -
Prediction of surface currents and drifter trajectories on the inner Scotian Shelf
The predictive skill of a simple model of surface flow on the Scotian Shelf is assessed using oceanographic data collected in February 1996. The model is forced by wind stress, water density, and sea level along the open ... -
Effects of temperature and circulation on the population dynamics of Calanus finmarchicus in the Gulf of St. Lawrence and Scotian Shelf: Study with a coupled, three-dimensional hydrodynamic, stage-based life history model
We developed a physical-biological model for the Gulf of St. Lawrence (GSL) and Scotian Shelf (SS) by coupling a stage-based life-history model of the planktonic copepod Calanus finmarchicus to a three-dimensional ocean ... -
Modeling events of sea-surface variability using spectral nudging in an eddy permitting model of the northeast Pacific Ocean
[ 1] Eddies are an important part of the current system that hugs the coasts of British Columbia and Alaska. The ability of "spectral nudging'' to improve the eddy statistics determined from model simulations of this current ... -
Assimilating long-term hydrographic information into an eddy-permitting model of the North Atlantic
No abstract available. -
Predicting the frequency of storm surges and extreme sea levels in the northwest Atlantic
[1] A 40 year hindcast of storm surges in the northwest Atlantic and adjacent shelf seas is performed using a 2-D nonlinear barotropic ocean model forced by realistic 6 hourly winds and air pressures. This hindcast is used ... -
Tide-surge interaction off the east coast of Canada and northeastern United States
[1] Sea level observations and a dynamical model are used to investigate tide-surge interaction in the coastal waters off the east coast of Canada and northern USA. The study is motivated in part by the need to improve ... -
Predicting mesoscale variability of the North Atlantic using a physically motivated scheme for assimilating altimeter and Argo observations
A computationally efficient scheme is described for assimilating sea level measured by altimeters and vertical profiles of temperature and salinity measured by Argo floats. The scheme is based on a transformation of ...