FN Archimer Export Format
PT J
TI Assessment of Ocean Swell Height Observations from Sentinel-1A/B Wave Mode against Buoy In Situ and Modeling Hindcasts
BT 
AF Wang, He
   Mouche, Alexis
   Husson, Romain
   Grouazel, Antoine
   Chapron, Bertrand
   Yang, Jingsong
AS 1:1,2;2:2;3:3;4:2;5:2;6:4;
FF 1:;2:PDG-ODE-LOPS-SIAM;3:;4:PDG-ODE-LOPS-SIAM;5:PDG-ODE-LOPS-SIAM;6:;
C1 National Ocean Technology Center, Ministry of Natural Resources, Tianjin 300112, China
   Laboratoire d’Océanographie Physique Spatiale, Centre de Brest, Ifremer, 29280 Plouzane, France
   Collecte Localisation Satellites, 29280 Plouzane, France
   State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
C2 NATL OCEAN TECHNOL CTR, CHINA
   IFREMER, FRANCE
   CLS, FRANCE
   SIO, CHINA
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-int-hors-europe
   copubli-sud
IF 5
TC 11
UR https://archimer.ifremer.fr/doc/00751/86278/91604.pdf
LA English
DT Article
DE ;swell;synthetic aperture radar;wave mode;validation;buoy;WaveWatch III;wave partition
AB Synthetic Aperture Radar (SAR) in wave mode is a powerful tool for monitoring sea states in terms of long-period ocean swells of a specific wave directional partition. Since 2016, SARs aboard Sentinel-1A/B operating in wave mode have provided ocean swell spectra dataset as Level-2 Ocean products on a continuous and global basis over open oceans. Furthermore, Level-3 swell products are processed by Copernicus Marine Environment Monitoring Services (CMEMS) taking the benefit of the unique “fireworks” analysis. In this paper, swell wave heights from Sentinel-1A/B wave mode during the period from June 2016 to June 2020 are evaluated. The reference data include the collocated in situ measurements from directional wave buoys and WaveWatch III (WW3) hindcasts. Assessment results show systematic overestimation of approximately 0.2 m in terms of the partitioned swell heights for Sentinel-1A/B Level-2 products compared to the directional buoy observations in eastern Pacific and the western Atlantic. Based on the reliable SAR-WW3 collocations after quality-controls, empirical corrections have been proposed for Sentinel-1 Level-2 swell heights. Independent comparisons against WW3 hindcasts and buoy observations demonstrate the validity of our postprocessing correction for both Level-2 and Level-3 swell heights by eliminating the biases and reducing the root mean square errors. The consistency between CMEMS Level-3 swells and buoy in situ is also examined and discussed by case studies. 
PY 2022
PD FEB
SO Remote Sensing
SN 2072-4292
PU MDPI AG
VL 14
IS 4
UT 000765080700001
DI 10.3390/rs14040862
ID 86278
ER

EF