Stress modulation account in the problem of the wave spectrum transformation caused by nonuniform currents

Author

Trohkimovski, Yuri

Author_Institution

Space Res. Inst., Moscow, Russia

Volume

3

fYear

1997

fDate

3-8 Aug 1997

Firstpage

1323

Abstract

The modulation of the momentum flux from turbulent wind flow over the ocean surface caused by the current gradient is considered. Simple estimation shows that the magnitude of such modulation can be up to 100-200% for strong internal waves (IW). A numerical technique is proposed to calculate the stress modulation and simulations are made for periodic IW and solitons. Variable stress is used in the source function of the wave action balance equation and the modulation of the X-band Bragg spectral density is used to calculate typical IW solitons. Momentum flux modulations due to a nonuniform current is incorporated in the theoretical models used for analysis and interpretation of ocean remote sensing from space

Keywords

atmospheric boundary layer; ocean waves; oceanographic techniques; oceanography; remote sensing by radar; spaceborne radar; wind; Bragg spectral density; X-band; atmosphere; marine boundary layer; measurement technique; model; momentum flux; nonuniform current; numerical model; ocean dynamics; ocean wave interaction; radar remote sensing; sea surface; soliton; spaceborne radar; stress modulation; strong internal wave; theory; turbulent wind flow; wave spectrum transformation; Amplitude estimation; Amplitude modulation; Friction; Internal stresses; Numerical models; Predictive models; Radar imaging; Sea surface; Surface waves; Wind speed;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International

Print_ISBN

0-7803-3836-7

Type

conf

DOI

10.1109/IGARSS.1997.606436

Filename

606436