| 内容提要: |
In coastal water, waves play a significant role on the turbulence through wave-turbulence interaction while their decomposition is difficult to be identified. High-frequency acoustic doppler velocimeters (ADV) allow us to determine the turbulent energy spectrum from measured velocity fluctuations. In conjunction with the concurrent wave observation, typical spectrum pattern under wave influence could be obtained. A bottom-tripod equipped with ADV, wave-height-meter and an auto-meteorological-station mounted at the surface buoy were deployed for 30 days at the near shore of Heini Bay, in the western Yellow Sea. Both horizontal and vertical velocity fluctuations are found to be strongly influenced by waves. A peak at the same frequency of waves was found in the energy spectrum under the wave influence. Compared to the energy spectrum without wave conditions, the inertial subrange became small and its starting turbulent wave number increased. The turbulent energy was larger than that without wave conditions. Turbulent energy produced by waves could be calculated from the energy spectrum and the wave-turbulent interaction was estimated by inertial subrange variation. |