检索结果-南通市图书馆

THE EFFECTS OF A SLOPING BOTTOM ON THE EQUATORIAL wave-induced DEEP RESIDUAL CURRENTS

在线全文

学校读者我要写书评

暂无评论

引用

Chinese Journal of Oceanology and Limnology 1997年第4期15卷 314-321页

作者：吴德星 Ocean University of Qingdao Qingdao

Based on an inverted one-and-one-half inviscid reduced gravity shallow water model with bottom topography representing an abyssal layer under a stagnant upper layer on the equatorial β-Plane, a set of field equations governing the wave-induced Lagrangian residual currents is developed. The equations show that the wave-induced Lagrangian residual ot satisfies generalized geostrophic dynamics. The relation of meridional residual current to vertical residual current resulted from the varied bottom is similar to the Sverdrup transport relation. The tranport process of potential vorticity for zeroth order approximation is determined by the advection whose velocity is equal to that of the weve-induced Lagrangian residual current.A Kelvin wave solution and the reated solution of Kelvin wave-induced Lagrangian residual current for the case of slowly varying topography are obtained anaytically. The wave solution shows that a shoaling eastward bottom can decrease the propagation speed of the Kelvin wave and cause it to take a longer time to transmit the energy from the west to the central and easterm parts of the basin, and can also shorten the wavelength and enhance the wave amplitude. The wave-induced residual current solution reveals that the existence of a sloping bottom can result in a onier meridional component of wave-induced mesidual current and that Kelvin wave-induced Lagrangian currents’s responses to bottom variation are greater than those of Kelvin wave orbital currents.

关键词： wave-induced Lagrangian residual current effects of bottom topography

Mechanism of sea ice formation based on comprehensive observation data in Liaodong Bay, China

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Oceanology and Limnology 2019年第6期37卷 1846-1856页

作者： SHI Yongfang YANG Yongzeng TENG Yong SUN Meng YUN Shengjun First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling National Laboratory for Marine Science and TechnologyQingdao 266071China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China

Sea ice disaster is one of the principal natural hazards that affect some coastal areas of China,and the formation of ice cover in a wave field has important ***,analysis of the mechanism in which waves affect the thermodynamic process of sea ice is lacking,and the influence of waves is not taken into consideration in numerical models of sea ice,largely because of a lack of simultaneous observations of waves and sea *** observational data of the sea ice cycle in the coastal waters of Liaodong Bay(China),we analyzed the characteristics of hydrology,meteorology,and sea ice thickness during the formation of sea ice,and explored the changes in the interrelationships among heat fluxes,waves,and sea ice under actual sea *** results could provide a decision-making support as a reference to the establishment and improvement of China's early waming system to sea ice disasters,and the protection of ice drilling operations and production platform safety.

关键词： wave sea ice wave-induced turbulence kinetic energy

Some characteristics and evolution of the internal soliton in the northern South China Sea

在线全文

学校读者我要写书评

暂无评论

引用

Chinese Science Bulletin 2002年第1期47卷 21-27页

作者： Cai, SQ Gan, ZJ Long, XM Chinese Acad Sci LED S China Sea Inst Oceanol Guangzhou 510301 Peoples R China

Based on the observational data of an internal soliton in the northern South China Sea (SCS) on June 14, 1998, the possible source of the internal soliton is analyzed, and some of its characteristic parameters such as phase speed, wave length, etc. are computed. Based on the analyses of the vertical modes of the internal wave, the characteristics of the wave-induced current during the propagation of the internal soliton are studied. A regularized long wave (RLW) equation numerical model considering effects of multi-fac-tors is employed, and the observed environmental parame-ters are used as the initial conditions to simulate the propa-gation and evolution of the internal soliton in the continental shelf of the northern SCS.

关键词： internal soliton wave-induced current regularized long wave equation numerical simulation.