ERS-1 SAR IMAGES OF ATMOSPHERIC GRAVITY-WAVES

被引：24

作者：

VACHON, PW

JOHANNESSEN, JA

BROWNE, DP

机构：

[1] EUROPEAN SPACE AGCY,ESTEC,NOORDWIJK,NETHERLANDS

[2] NANSEN ENVIRONM & REMOTE SENSING CTR,N-5037 SOLHEIMSVIKEN,NORWAY

[3] VEGA SPACE SYST ENGN LTD,HARPENDEN,HERTS,ENGLAND

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1995年 / 33卷 / 04期

关键词：

Synthetic aperture radar;

D O I：

10.1109/36.406687

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

ERS-1 synthetic aperture radar (SAR) images of atmospheric gravity waves over the ocean are discussed, Several case studies are presented in detail, It is shown that the well-organized long wavelength (1 to 10 km) wave phenomena which often are seen in SAR images over the ocean may be atmospheric gravity waves, The waves appear in the SAR images because they modulate the surface wind speed which in turn modulates the surface roughness and the radar cross section, The wavelength may be measured directly from the SAR image, and the mean wind speed and wind speed modulation near the ocean surface may be estimated from the observed radar cross section modulation using a wind retrieval model, The atmospheric gravity waves usually were generated by the approach or passing of a meteorological front. Atmospheric soundings and a two-layer model for the lower troposphere indicate that, in general, the observed atmospheric wave phenomena could have been supported by accompanying temperature inversion layers and wind shears.

引用

页码：1014 / 1025

页数：12

共 11 条

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