物理海洋学名词-V 448

Glossary of Physical Oceanography and Related Disciplines

Steven K. Baum Department of Oceanography Texas A&M University

May 26, 2004

 

Vector Measuring Current Meter A current meter used in oceanography that is effective at measuring near-surface currents since it is not as susceptible as some other meters to contamination from vertical currents and high frequency horizontal currents. It uses two orthogonal propellors to achieve insensitivity to current flow at right angles to the propellor axis. See Weller and Davis [1980].


veering Said of the clockwise change of the direction of a wind, as opposed to backing.


VEINS Acronym for Variability of Exchanges in Northern Seas, a project whose overall objective is to measure and model the variability of fluxes between the Arctic Ocean and the Atlantic Ocean with a longer term view of implementing a system for taking critical measurements needed to understand the role of the high latitude oceans in decadal climate variability. This objective is based on the fact that interannual to decadal climate variability plays an important role in the water mass conversion processes in the northern seas. The VEINS scientific objectives are:
• to obtain time series measurements of heat, salt and water fluxes for the exchange routes through the Northern Seas, i.e. between the Atlantic Ocean and the Nordic Seas and between the Nordic Seas and the Arctic Ocean;
• to quantify the magnitude and variability of these fluxes;
• to improve the understanding of the processes responsible for the variability; and
• to develop a conceptual model of exchanges and water mass alterations between the Atlantic and Arctic Oceans which will be used to estimate the integrated effect of exchanges from the four measurement areas as well as to design an optimal measurement program for the long term.
VEINS started in Feb. 1997 and was designed to run for 3.5 years and possibly longer with a funding extension.
[http://www.ices.dk/ocean/project/veins/]


velocity potential A scalar function that exists in irrotational fluid motion. If we denote the velocity potential by φ, then it is defined by the equation
V=−▽φ
where V is the velocity vector. This equation implies that V is normal to the equipotential lines and is directed from high to low potential.


Vema Channel See Vema Gap.


Vema Gap A deep-sea channel that connects the Hatteras Abyssal Plain to the Nares Abyssal Plain in the North American Basin. This is an important passasge for northward traveling deep water formed in the Antarctic. This is also known as the Vema Channel. See Fairbridge [1966], Hogg and Zenk [1997] and McDonagh et al. [2002].


vendavales A name given to strong, squally, southwest winds in the Straits of Gibraltar and off the east coast of Spain. It is associated with depressions and occurs mainly between September and March. They usually bring stormy weather and heavy rain.


VENTEX Acronym for Vent Experiment.


ventilated thermocline See Luyten et al. [1983] for the original concept and Huang [1991] and Pedlosky [1990] for reviews.

 

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