Communiqué on veering wind effects on scatterometry from the sea-surface

Larry Bliven (1) , Valérie Billat (2) , Piotr Sobieski (3) , A. Guissard (3) , Hubert Branger (4) , Jean-Paul Giovanangeli (4)

1 WFF - NASA Wallops Flight Facility
2 ACRI
3 UCL - Université Catholique de Louvain = Catholic University of Louvain
4 IRPHE - Institut de Recherche sur les Phénomènes Hors Equilibre

To characterize scatterometer returns from the sea-surface near meteorological fronts, the authors investigated microwave scattering from seas in which long-waves are at oblique angles to short-waves. They simulate the effects of veering winds on a C-band scatterometer by using models in which the short-waves align with the wind-friction velocity u*, but the long-waves are at oblique angles to the u* direction. As the oblique angle increases, tilt effects due to the long-waves led to unusual scan patterns with reduced azimuthally-averaged radar cross-sections a0.

Mots clés: veering wind; scatterometer; wind waves; experiments; wave tank

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Océan, Atmosphère

Larry Bliven, Valérie Billat, Piotr Sobieski, A. Guissard, Hubert Branger, et al.. Communiqué on veering wind effects on scatterometry from the sea-surface. Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, Aug 1994, Pasadena, United States. pp.954-956, ⟨10.1109/IGARSS.1994.399311⟩. ⟨hal-00853844⟩