A comparison of gravity wave phase velocities calculated from the impedance equation and pressure data

Autor:	Werner Nater, Hans Richner
Rok vydání:	1981
Předmět:	Physics Capillary wave Wave propagation Infragravity wave Computational Mechanics Astronomy and Astrophysics Mechanics Geophysics Classical mechanics Geochemistry and Petrology Mechanics of Materials Wave shoaling Gravity wave Particle velocity Phase velocity Dispersion (water waves)
Zdroj:	Geophysical & Astrophysical Fluid Dynamics. 17:15-26
ISSN:	1029-0419 0309-1929
DOI:	10.1080/03091928108243670
Popis:	Marked oscillations in wind speed, wind direction and pressure with periods of between 5 and 15 minutes were recorded on a number of occasions and it is assumed that they were produced by atmospheric gravity waves. Gossard and Munk (1954) have shown that the phase velocity of a gravity wave can be calculated using wind and pressure fluctuation data from a single station by means of the “impedance equation”. It is also possible to measure the phase velocity of a gravity wave using an array of microbarovariographs. In this investigation, the phase velocity of gravity waves calculated using these two different methods are compared and the feasibility of deriving wave characteristics from single point measurements is discussed. The results show that, while in a few isolated cases the two velocities agree reasonably well, the application of the impedance equation to data from a single station is limited due to the superposition of local wind systems upon the wave-induced perturbations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::858157184a8ed5f2ddd14e298338f661 https://doi.org/10.1080/03091928108243670 Zobrazit plný text záznamu