FN Archimer Export Format PT J TI Importance of peakedness in sea surface slope measurements and applications BT AF CHAPRON, Bertrand KERBAOL, V VANDEMARK, D ELFOUHAILY, T AS 1:;2:;3:;4:; FF 1:PDG-DRO-DOPS-LOS;2:;3:;4:; C1 IFREMER, Ctr Brest, Dept Oceanog Spatiale, Inst Francais Petr, F-29280 Plouzane, France. Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA. NASA, Goddard Space Flight Ctr, Lab Hydrospher Proc, Wallops Island, VA 23337 USA. C2 IFREMER, FRANCE JOHNS HOPKINS UNIV, USA NASA, USA SI BREST SE PDG-DRO-DOPS-LOS IN WOS Ifremer jusqu'en 2018 IF 2.68 TC 47 UR https://archimer.ifremer.fr/doc/00000/10503/9399.pdf LA English DT Article AB We recall the simple statistical concept that non-Gaussian distribution peakedness results from the compounding of random processes. This idea is applied to observations and analysis of sea surface slopes as inferred using optical and microwave-scattering measurements. Our study emphasizes the importance of identifying and quantifying the distribution variance and kurtosis from observations. Data are shown to indicate consistently non-Gaussian peakedness, to indicate the need to report at least two parameters in an even order analysis, and to indicate near equivalence between radar and optical data. Physical interpretation for observed infrequent steep slopes is given via compounding statistical processes where normally distributed short-scale waves are modulated because of random fluctuations mainly associated with the underlying long wave field. Implications of non-Gaussian peakedness are provided for altimeter backscatter theory and for modeling wave-breaking probability. PY 2000 PD JUN SO Journal Of Geophysical Research Oceans SN 0148-0227 PU Amer Geophysical Union VL 105 IS C7 UT 000088260600026 BP 17195 EP 17202 ID 10503 ER EF