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Potential spicity: the winding road in search
来源:LASG    访问次数:    报告时间:2018-10-10
【报告人】        Prof. Ruixin Huang
【报告人单位】Woods Hole Oceanographic Institution, USA
【报告时间】    2018年10月10日(星期三)10:00
【报告地点】    新楼1118会议室
【报告简介】    

Isopycnal analysis has been widely used in oceanography. 50 years ago, it was proposed that a thermodynamic function (spicity, 涩度) whose contours are perpendicular to those of density should be a useful thermodynamic variable. Searching for such a variable failed up till now; people gave up the hope and even said that such a function “does not exist”, and it is “devoid of physical meaning”.

We reformulated this problem in terms of a least square problem, and solved it by a two-step linearization. A nearly perfection solution is found. Density and spicity form an orthogonal coordinate system, which is a new tool in water mass analysis. First, distance between two water masses can be clearly defined in this orthogonal coordinates. Second, density-spicity curve can be used in water mass analysis. The door is now widely open and new discoveries are on the horizon.

 
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