Sea surface wind speed estimation from space-based lidar measurements - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Atmospheric Chemistry and Physics Année : 2008

Sea surface wind speed estimation from space-based lidar measurements

Résumé

Global satellite observations of lidar backscatter measurements acquired by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) mission and collocated sea surface wind speed data from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E), are used to investigate the relation between wind driven wave slope variance and sea surface wind speed. The new slope variance – wind speed relation established from this study is similar to the linear relation from Cox-Munk (1954) and the log-linear relation from Wu (1972, 1990) for wind speed larger than 7 m/s and 13.3 m/s, respectively. For wind speed less than 7 m/s, the slope variance is proportional to the square root of the wind speed, assuming a two dimensional isotropic Gaussian wave slope distribution. This slope variance – wind speed relation becomes linear if a one dimensional Gaussian wave slope distribution is assumed. Contributions from whitecaps and subsurface backscattering are effectively removed by using 532 nm lidar depolarization measurements. This new slope variance – wind speed relation is used to derive sea surface wind speed from CALIPSO single shot lidar measurements (70 m spot size), after correcting for atmospheric attenuation. The CALIPSO wind speed result agrees with the collocated AMSR-E wind speed, with 1.2 m/s rms error.
Fichier principal
Vignette du fichier
acpd-8-2771-2008.pdf (951.53 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-00328304 , version 1 (18-06-2008)
hal-00328304 , version 2 (20-05-2019)

Identifiants

  • HAL Id : hal-00328304 , version 1

Citer

Y. Hu, K. Stamnes, M. Vaughan, Jacques Pelon, C. Weimer, et al.. Sea surface wind speed estimation from space-based lidar measurements. Atmospheric Chemistry and Physics, 2008, 8, pp.3593-3601. ⟨hal-00328304v1⟩

Collections

EGU
232 Consultations
248 Téléchargements

Partager

Gmail Facebook X LinkedIn More