FN Archimer Export Format PT J TI Tracking the attenuation and nonbreaking dissipation of swells using altimeters BT AF JIANG, Haoyu STOPA, Justin WANG, He HUSSON, Romain MOUCHE, Alexis CHAPRON, Bertrand CHEN, Ge AS 1:1,2;2:2;3:2,3;4:4;5:2;6:2;7:1; FF 1:PDG-ODE-LOPS-SIAM;2:PDG-ODE-LOPS-SIAM;3:;4:;5:PDG-ODE-LOPS-SIAM;6:PDG-ODE-LOPS-SIAM;7:; C1 Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Coll Informat Sci & Engn, Qingdao, Peoples R China. IFREMER, Ctr Brest, Lab Oceanog Spatiale, Plouzane, France. State Ocean Adm, Natl Ocean Technol Ctr, Tianjin, Peoples R China. Collecte Localisat Satellites, Plouzane, France. C2 UNIV OCEAN CHINA, CHINA IFREMER, FRANCE STATE OCEAN ADM, CHINA CLS, FRANCE SI BREST SE PDG-ODE-LOPS-SIAM UM LOPS IN WOS Ifremer jusqu'en 2018 copubli-france copubli-int-hors-europe copubli-sud IF 2.939 TC 21 UR https://archimer.ifremer.fr/doc/00314/42526/41897.pdf LA English DT Article DE ;altimeter;swell dissipation;swell tracking AB A method for systematically tracking swells across oceanic basins is developed by taking advantage of high-quality data from space-borne altimeters and wave model output. The evolution of swells is observed over large distances based on 202 swell events with periods ranging from 12 to 18 s. An empirical attenuation rate of swell energy of about 4 × 10−7 m−1 is estimated using these observations, and the nonbreaking energy dissipation rates of swells far away from their generating areas are also estimated using a point source model. The resulting acceptance range of nonbreaking dissipation rates is −2.5 to 5.0 × 10−7 m−1, which corresponds to a dissipation e-folding scales of at least 2000 km for steep swells, to almost infinite for small-amplitude swells. These resulting rates are consistent with previous studies using in-situ and synthetic aperture radar (SAR) observations. The frequency dispersion and angular spreading effects during swell propagation are discussed by comparing the results with other studies, demonstrating that they are the two dominant processes for swell height attenuation, especially in the near field. The resulting dissipation rates from these observations can be used as a reference for ocean engineering and wave modeling, and for related studies such as air-sea and wind-wave-turbulence interactions. PY 2016 PD FEB SO Journal Of Geophysical Research-oceans SN 2169-9275 PU Amer Geophysical Union VL 121 IS 2 UT 000373134600024 BP 1446 EP 1458 DI 10.1002/2015JC011536 ID 42526 ER EF