Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"Wind stress curl"”.
-
On the calculation of wind stress curl over open ocean areas from synoptic meteorological data with application to time dependent ocean circulation
The method used by N. P. Fofonoff for estimating wind stress curl from surface atmospheric pressure maps is developed for use with the National Meterological Center analysis grid. A formula is developed relating the wind stress curl directly to geometrically apparent features of the surface …
-
On the calculation of wind stress curl over open ocean areas from synoptic meteorological data with application to time dependent ocean circulation.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth and Planetary Science, 1972
-
Equilibrium dynamics of the Benguela system : a numerical modelling approach
… Benguela region and is driven primarily by the wind-stress curl via the Sverdup relation. As such, it is strongly seasonal and is most intense during spring and summer when the wind-stress curl is most negative. The poleward flow deepens as it moves southward and between 25-27° much of it veers …
-
Multiple equilibria and low-frequency variability of wind-driven ocean models
… steady states of two models of the double-gyre wind-driven ocean circulation are studied. The link between the steady state solutions of the models and their time-mean and low-frequency variability is explored to test the hypothesis that both stable and unstable fixed points influence shape the …
-
Investigating the seasonal and interannual variability of the poleward undercurrent in the northern Benguela system
… which is consistent with the increased negative wind stress curl during those seasons. The wind stress curl in the region exhibits a strong connection with the transport of the PUC via the Sverdrup relation. The PUC exhibits interannual variability when comparing to the Benguela Niño events, but …
-
GLOBAL TRENDS IN EDDY KINETIC ENERGY FROM SATELLITE ALTIMETRY
… Southern Ocean. Buoyancy forcing and non-local wind forcing related to the PDO are significant in the North Pacific. In the North Atlantic, changes in wind stress curl as well as changes in local wind speed are implicated, where a di-polar pattern of correlations with the NAO is observed. In the …
-
Interannual variability and long-term trends of surface hydrography around the Prince Edward Island Archipelago, Southern Ocean
… variability of Sea Surface Temperature (SST), wind forcing and surface circulation at the PEIs and determine whether natural modes of climate variability like the El Niño Southern Oscillation (ENSO), Southern Annular Mode (SAM) or SemiAnnual Oscillation (SAO) were affecting these parameters. …
-
Upper Ocean Transport Variability in the Subtropical North Atlantic
… resolution. Finally, a detailed analysis of wind stress and wind stress curl fields of the subtropical North Atlantic is used to estimate both the Ekman and Sverdrup transports and to isolate the dominant time and space scales of variability.<br/><br/>The mean zonally integrated interior …
-
Oceanic response observations due to passing tropical cyclones : an assessment of drag and sea spray parameterizations
… strong cyclonic flow and resulting positive wind stress curl imparted on the sea surface. In August 2015, Air-Launched Autonomous Micro Observer float 9077 was intercepted by Hurricane Ignacio and its temperature measurements revealed a 40 m depression of the 26°C isotherm ahead of the …
-
Comparison study of SEASAT scatterometer and conventional wind fields
A demonstrated need exists for better wind field information over the open ocean, especially as a forcing function for ocean circulation models. Microwave scatterometry, as a means of remotely sensing surface wind information, developed in response to this requirement for a surface wind field with …
-
Improving wind-based upwelling estimates off the west coasts of North and South America
… to December 2001 using geostrophically derived winds, model-derived winds from the U.S. Navy's global atmospheric (NOGAPS) model, and QuikSCAT satellite-measured winds. Satellite-measured winds, verified with 15 U.S. west coast buoys, were within 1.3 m s-1 and 26ﾰ RMS. Upwelling estimates …
-
Impactos do El Niño 1997/1998 sobre a dinâmica da Corrente do Brasil
… the South Atlantic's Subtropical High (SASH) winds pattern, which is the main actor forcing the surface South Atlantic Subtropical Gyre (SASG). On the west edge of the SASG is present the Brazil Current (BC), which has its superficial drainage derectally influenced by this atmospheric feature. …
-
Linear normal mode analysis of baroclinic instability in a meridional channel
… by the input of vorticity from an imposed wind stress curl. Thus in the two-layer system, the vertical shear, in thermal wind balance, is associated with an interface slope which provides a gradient of potential vorticity (PV) in the x-direction, of equal magnitude and opposite sign in the …
-
Gulf stream temperature, salinity and transport during the last millennium
… LIA transport was due to weaker subtropical gyre wind stress curl. The oxygen isotopic composition of Florida Current surface water ([delta]18Ow) near Dry Tortugas increased 0.4%0/ during the course of the Little Ice Age (LIA: -1200-1850 A.D.), equivalent to a salinity increase of 0.8-1.5 psu. On …
-
Linear normal mode analysis of baroclinic instability in a meridional channel
… by the input of vorticity from an imposed wind stress curl. Thus in the two-layer system, the vertical shear, in thermal wind balance, is associated with an interface slope which provides a gradient of potential vorticity (PV) in the x-direction, of equal magnitude and opposite sign in the …
-
Heat Storage and Transport Processes in the Tropical Atlantic Ocean
… Key features of the model are the sea level wind field, equatorial upwelling rate and escape transport of the formed warm water out of the equatorial basin.</p> <p>The model wind field is driven by a distribution of vertical velocities at the top of the atmospheric boundary layer. The wind …
-
Variability of coastal upwelling south of Madagascar
… upwelling index is calculated. The influence of winds and ocean currents as drivers of the upwelling are investigated using satellite, in-situ observations, and a numerical model. Results reveal the presence of two well-defined upwelling cells. The first cell (Core 1) is located in the …
-
The structure of the upper ocean, atmosphere and heat fluxes - Tropical Indian Ocean
… shear and to the overlying distribution of wind stress curl. The meridional advection of air into the central Indian Ocean region is shown to modulate the characteristics of the atmospheric boundary layer in the tropical Indian Ocean. The maximum turbulent heat and moisture transports to the …
-
Gulf Stream temperature, salinity and transport during the last millennium
… LIA transport was due to weaker subtropical gyre wind stress curl. The oxygen isotopic composition of Florida Current surface water (δ18O w) near Dry Tortugas increased 0.4% during the course of the Little Ice Age (LIA: ~1200-1850 A.D.), equivalent to a salinity increase of 0.8-1.5 psu. On the …
Page 1 of 2