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Original Articles

Detection and Characterization of Mesoscale Cyclones in RADARSAT Synthetic Aperture Radar Images of the Labrador Sea

Pages 213-230 | Published online: 31 Jul 2014
 

RÉSUMÉ

Nous étudions les images radar à synthèse d'ouverture (RSO) de RADARSAT en mode faisceau ScanSAR large de plusieurs cyclones à méso-échelle qui se sont développés au-dessus de la mer du Labrador durant l'hiver 1997/98. Les trois études de cas démontrent la capacité des images ScanSAR de RADARSAT à fournir une information détaillée sur la structure des champs de vent à la surface associés à ces tempêtes intenses. Les images RSO utilisées conjointement avec les données sur les conditions météorologiques et les images infrarouge thermique des patrons de nuages associés montrent les zones de cisaillement du vent en spirale des cyclones de même qu'une zone de convection bien organisée à proximité au cours des divers stades de développement des cyclones. Dans le futur, des champs de vent océanique dérivés des images ScanSAR de RADARSAT pourraient améliorer les modèles de simulation dans le cas des cyclones polaires et autres cyclones à méso-échelle et ainsi jouer un rôle en météorologie marine opérationnelle.

SUMMARY

We consider RADARSAT synthetic aperture radar (SAR) ScanSAR wide mode images of several mesoscale cyclones that developed over the Labrador Sea during the winter of 1997/98. The three case studies demonstrate RADARSAT ScanSAR's capability to provide detailed information on the near surface wind field structure associated with these intense storms. The SAR images, along with accompanying meteorological conditions and thermal infrared images of the associated cloud patterns, show the spiral-form shear zones of the cyclones as well as nearby organized convection during various stages of cyclone development. In future, ocean wind fields retrieved from RADARSAT ScanSAR images could help to improve simulation models for polar and other mesoscale cyclones and could have a role in operational marine meteorology.

Additional information

Notes on contributors

I. Chunchuzov

I. Chunchuzov and P.W. Vachon are with the Canada Centre for Remote Sensing, 588 Booth Street, Ottawa, Ontario K1A 0Y7 Canada, Tel: 613-995-1575, Fax: 613-947-1385, E-Mail: [email protected]

P.W. Vachon

I. Chunchuzov and P.W. Vachon are with the Canada Centre for Remote Sensing, 588 Booth Street, Ottawa, Ontario K1A 0Y7 Canada, Tel: 613-995-1575, Fax: 613-947-1385, E-Mail: [email protected]

B. Ramsay

B. Ramsay is with Canadian Ice Service, 373 Sussex Drive, Ottawa, Ontario K1A 0H3 Canada, Tel: 613-996-1550, Fax: 613-947-9160, E-mail: [email protected]

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