Multi-polarization radar backscatter signatures of internal waves at L-band

de Macedo, C.; da Silva, J.; Buono, A.; Migliaccio, M.

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1080/01431161.2022.2050435

Titre :

Multi-polarization radar backscatter signatures of internal waves at L-band

Auteur(s) :

de Macedo, C. [Auteur]
Laboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Departamento de Geociencias, Ambiente e Ordenamento do Territorio [DGAOT]
da Silva, J. [Auteur]
Departamento de Geociencias, Ambiente e Ordenamento do Territorio [DGAOT]
Buono, A. [Auteur]
Università degli Studi di Napoli “Parthenope” = University of Naples [PARTHENOPE]
Migliaccio, M. [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia
Università degli Studi di Napoli “Parthenope” = University of Naples [PARTHENOPE]

Titre de la revue :

INTERNATIONAL JOURNAL OF REMOTE SENSING

Pagination :

1943-1959

Éditeur :

Taylor & Francis

Date de publication :

2022-04-04

ISSN :

0143-1161

Mot(s)-clé(s) en anglais :

Internal waves
backscattering
polarization
SAR
L-Band

Discipline(s) HAL :

Planète et Univers [physics]

Résumé en anglais : [en]

In this study, the scattering mechanisms associated to internal waves (IWs) are investigated at L-band. IWs represent key geophysical factors for sea-air heat exchange and play a paramount role in the biological primary ...
Lire la suite >In this study, the scattering mechanisms associated to internal waves (IWs) are investigated at L-band. IWs represent key geophysical factors for sea-air heat exchange and play a paramount role in the biological primary production and in the understanding of the evolution of climate ecosystem. In addition, a better understanding of IWs microwave scattering mechanisms can improve the modeling capability and, therefore, can boost the development on advanced synthetic aperture radar (SAR)-based added-value products to mitigate the risk for offshore drilling operations and aquaculture activities associated to IWs. The analysis of L-band multi-polarization SAR scattering of IWs under the influence of surface current straining is performed using a meaningful full-polarimetric Advanced Land Observing Satellite Phased Array type L-band 1 SAR data set collected over IWs observed under different imaging and wind conditions. Time and space co-located ancillary information is also available. Experimental results demonstrate that the non-polarized scattering mechanisms constitute a significant contribution to the total IW backscattering, especially in the case of surface current gradients owing to IWs (about 48–57%). It is also found that the non-polarized scattering contribution associated to IW concentrates along the wave crests, i.e. it is at least 60% larger than the one observed along the wave troughs. In addition, considering the IW traveling directions relative to that of the wind, the non-polarized scattering contribution associated to IWs is more remarkable at upwind direction while it is less significant at down/crosswind directions. The non-polarized scattering mechanisms also calls for a modulation induced by IWs which is much more significant,i.e. at least three times, that the one that characterizes the polarized scattering mechanism.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL

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