微分方程稳定性理论在海洋热盐环流中的应用  

The Application of Differential Equations Stability Theory in Ocean Thermohaline Circulation

作　　者：沈阳[1] 曹洪奎[2] 王贺元[1] 

机构地区：[1]辽宁工业大学理学院,辽宁锦州121001 [2]辽宁工业大学电子与信息工程学院,辽宁锦州121001

出　　处：《辽宁大学学报（自然科学版）》2015年第1期33-37,共5页Journal of Liaoning University：Natural Sciences Edition

基　　金：辽宁省教育厅科研基金(L2011096;L2013248);锦州市科技专项基金(13A1D32)

摘　　要：通过建立海洋热盐环流两层模型中的温度和盐度的微分方程,并对平衡态解进行稳定性分析,研究了海表温度、淡水通量和风生环流对热盐环流的多平衡态的影响.研究结果显示:海表温度的降低、风生环流的减弱和淡水通量的增强都会导致稳定的热型环流强度减弱,并进而使环流从稳定的热型"突变"到稳定的盐型.By establishing the differential equations of temperature and salinity in a two-layer model of ocean thermohaline circulation （THC）, and further analyzing the stability of the equilibrium solutions, we studied the influence of sea surface temperature, freshwater flux and wind driven circulation on the equilibria of THC. The research results show that the reduction of sea surface temperature, the weakening of wind driven circulation and the increase of freshwater flux all can result in the recede of THC in a stable thermal mode,and further lead to a ＂collapse＂ from a stable thermal mode to a stable saline mode in THC.

关 键 词：微分方程 热盐环流 平衡态 稳定性 

分 类 号：P731.27[天文地球—海洋科学] O175.14[理学—数学]