caa a22 4500 605546827 CHVBK 20210128100943.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10236-015-0811-4 doi (NATIONALLICENCE)springer-10.1007/s10236-015-0811-4 Potter Henry Naval Research Laboratory, 4555 Overlook Ave., SW, 20375, Washington, DC, USA aut Swell and the drag coefficient [Elektronische Daten] [Henry Potter] Simultaneous measurements of waves and turbulent fluxes were collected from a moored surface buoy in the Philippine Sea. Waves were partitioned into their wind sea and swell components, and the ratio of swell to wind sea energy was used to assign a swell index. The 10-m neutral drag coefficient was calculated using the eddy correlation method. Four hundred hours of data were processed in 30minute runs for wind speeds 8.5 to 16.5ms−1 when the peak wave direction was within 90° of the wind direction and included observations during mixed seas, swell dominant, and wind sea dominant conditions. The data were analyzed to explore the influence of swell on the drag coefficient. It was found that when compared to periods of equal wind speed, the drag coefficient was reduced up to 37% when swell energy was twice that of the wind sea energy. It is believed that this reduction was due to a decrease in the turbulent flux around the swell frequency, suggesting that the swell diminishes the surface aerodynamic roughness. Springer-Verlag Berlin Heidelberg, 2015 Drag coefficient nationallicence Waves nationallicence Swell nationallicence Momentum flux nationallicence Ocean Dynamics Springer Berlin Heidelberg 65/3(2015-03-01), 375-384 1616-7341 65:3<375 2015 65 10236 https://doi.org/10.1007/s10236-015-0811-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10236-015-0811-4 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Potter Henry Naval Research Laboratory, 4555 Overlook Ave., SW, 20375, Washington, DC, USA aut NATIONALLICENCE 773 0- Ocean Dynamics Springer Berlin Heidelberg 65/3(2015-03-01), 375-384 1616-7341 65:3<375 2015 65 10236