FN Archimer Export Format
PT J
TI Application of a new algorithm using Doppler information to retrieve complex wind fields over the Black Sea from ENVISAT SAR images
BT 
AF ALPERS, Werner
   MOUCHE, Alexis
   HORSTMANN, Jochen
   IVANOV, Andrei Yu.
   BARABANOV, Vladyslav S.
AS 1:1;2:2;3:3;4:4;5:5;
FF 1:;2:PDG-ODE-LOS;3:;4:;5:;
C1 Univ Hamburg, Inst Oceanog, Hamburg, Germany.
   IFREMER, Lab Oceanog Spatiale, Plouzane, France.
   Helmholtz Zentrum, Inst Coastal Res, Geesthacht, Germany.
   Russian Acad Sci, PP Shirshov Inst Oceanol, Moscow, Russia.
   Marine Hydrophys Inst, Sevastopol, Russia.
C2 UNIV HAMBURG, GERMANY
   IFREMER, FRANCE
   HELMHOLTZ ZENTRUM, GERMANY
   RUSSIAN ACAD SCI, RUSSIA
   MARINE HYDROPHYS INST, RUSSIA
SI BREST
SE PDG-ODE-LOS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-europe
   copubli-int-hors-europe
IF 1.64
TC 10
UR https://archimer.ifremer.fr/doc/00253/36390/35443.pdf
LA English
DT Article
AB Several algorithms have been proposed to retrieve near-surface wind fields from C-band synthetic aperture radar (SAR) images acquired over the ocean. They mainly differ in the way they retrieve the wind direction. Conventionally, the wind direction is taken from atmospheric models or is extracted from the linear features sometimes visible in SAR images. Recently, a new wind retrieval algorithm has been proposed, which also includes the Doppler shift induced by motions of the sea surface. In this article, we apply three wind retrieval algorithms, including the one using Doppler information, to three complex wind events encountered over the Black Sea and compare the SAR-derived wind fields with model wind fields calculated using the high-resolution weather research and forecasting (WRF) model. It is shown that the new algorithm is very efficient in resolving the 180° ambiguity in the wind direction, which is often a problem in the streak-based wind retrieval algorithms. However, the Doppler-based algorithm only yields good results for wind directions that have a significant component in the look direction of the SAR antenna. Furthermore, it is dependent on good separation of the contributions to the Doppler shift induced by surface currents and wind-related effects (wind drift and wind-sea components of the ocean wave spectrum). We conclude that an optimum wind retrieval algorithm should consist of a combination of the algorithms based on linear features and Doppler information.
PY 2015
SO International Journal Of Remote Sensing
SN 0143-1161
PU Taylor & Francis Ltd
VL 36
IS 3
UT 000349639100011
BP 863
EP 881
DI 10.1080/01431161.2014.999169
ID 36390
ER

EF