NDLI: Persistent and energetic bottom-trapped topographic Rossby waves observed in the southern South China Sea

Content Provider	PubMed Central
Author	Shu, Yeqiang Xue, Huijie Wang, Dongxiao Chai, Fei Xie, Qiang Cai, Shuqun Chen, Rongyu Chen, Ju Li, Jian He, Yunkai
Copyright Year	2016
Abstract	Energetic fluctuations with periods of 9–14 days below a depth of 1400 m were observed in the southern South China Sea (SCS) from 5 years of direct measurements. We interpreted such fluctuations as topographic Rossby waves (TRWs) because they obey the dispersion relation. The TRWs persisted from May 24, 2009 to August 23, 2013, and their bottom current speed with a maximum of ~10 cm/s was one order of magnitude greater than the mean current and comparable to the tidal currents near the bottom. The bottom-trapped TRWs had an approximate trapping depth of 325 m and reference wavelength of ~82 km, which were likely excited by eddies above. Upper layer current speed that peaked approximately every 2 months could offer the energy sources for the persistent TRWs in the southern SCS. Energetic bottom-trapped TRWs may have a comparable role in deep circulation to tides in areas with complex topography.
Related Links	http://dx.doi.org/10.1038/srep24338
Starting Page	24338
File Format	PDF
ISSN	20452322
e-ISSN	20452322
Journal	Scientific Reports
Volume Number	6
Language	English
Publisher	Nature Publishing Group
Publisher Date	2016-04-01
Access Restriction	Open
Rights Holder	Nature Publishing Group
Subject Keyword	Science and technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Persistent and energetic bottom-trapped topographic Rossby waves observed in the southern South China Sea