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The Effect of Discharge, Tides, and Wind on Lift-Off Turbulence
Wang, Jianfeng1,5; MacDonald, Daniel G.2; Orton, Philip M.3; Cole, Kelly4; Lan, Jian5
2015-11-01
发表期刊ESTUARIES AND COASTS
卷号38期号:6页码:2117-2131
文章类型Article
摘要Data from three deployments of a 1200 kHz moored Acoustic Doppler Current Profiler (ADCP) were used to study the factors affecting turbulent kinetic energy (TKE) production in the lift-off zone of a mid-sized river plume (Merrimack River, Newburyport, MA) during the spring freshets of 2007, 2010, and 2011. TKE production was estimated from the ADCP data, during periods of minimal wave activity, using the variance method, with significant variability in plume thickness and TKE production observed between ebbs. Correlations with this observed variability and the primary environmental variables, such as river flow, wind speed/direction, and tidal range, were noted. On the basis of these observations, we quantify the contribution of these forcing mechanisms to the observed TKE production using an empirical approach based on the marginal value of the discharge Froude number (which is scaled from the environmental variables) above a critical value of one. The resulting regression provides a means for estimating TKE production in the lift-off zone as a function of only the environmental variables, and produces results consistent with previous observations from other turbulence measurement techniques in the Merrimack plume. The regression also provides an indication of the relative importance of the various forcing mechanisms, and suggests that onshore (east) winds and river discharge are the most important factors in controlling TKE production in the Merrimack plume, with tidal range of lesser significance.
关键词Turbulent Kinetic Energy Production River Plume Lift-off Zone Adcp Variance Method
DOI10.1007/s12237-015-9958-y
收录类别SCI
语种英语
WOS记录号WOS:000362580300023
引用统计
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/52404
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Shandong, Peoples R China
2.Univ Massachusetts Dartmouth, Dept Civil & Environm Engn, N Dartmouth, MA USA
3.Stevens Inst Technol, Davidson Lab, Hoboken, NJ 07030 USA
4.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA
5.Ocean Univ China, Phys Oceanog Lab, Qingdao, Shandong, Peoples R China
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Wang, Jianfeng,MacDonald, Daniel G.,Orton, Philip M.,et al. The Effect of Discharge, Tides, and Wind on Lift-Off Turbulence[J]. ESTUARIES AND COASTS,2015,38(6):2117-2131.
APA Wang, Jianfeng,MacDonald, Daniel G.,Orton, Philip M.,Cole, Kelly,&Lan, Jian.(2015).The Effect of Discharge, Tides, and Wind on Lift-Off Turbulence.ESTUARIES AND COASTS,38(6),2117-2131.
MLA Wang, Jianfeng,et al."The Effect of Discharge, Tides, and Wind on Lift-Off Turbulence".ESTUARIES AND COASTS 38.6(2015):2117-2131.
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