On the determination and simulation of seawater freezing point temperature under high pressure

作者：YAN Liangjun,WANG Zhaomin,LIU Chengyan,WU Yang

摘要：At present,it is believed that the freezing point temperature of seawater is a function of salinity and pressure,and the freezing point is a key parameter in a coupled air-sea-ice system.Generally,empirical formulas or methods are used to calculate the freezing point of seawater.Especially in high-pressure situations,e.g.,under a thick ice sheet or ice shelf,the pressure term must be taken into account in the determination of seawater freezing point temperature.This study summarized various methods that have been used to calculate seawater freezing point with high pressure.The methods that were employed in two ocean-ice models were also assessed.We identified the disadvantages of these methods used in these two models and addressed the corresponding uncertainties of the freezing point temperature formulas.This study provides useful information on the calculation of the freezing point temperature in numerical modeling and indicates a need to investigate the sensitivity of numerical simulations to the uncertainties in the freezing point temperature in future.

发文机构：College of Oceanography International Polar Environment Research Laboratory University Corporation for Polar Research

关键词：FREEZINGPOINTTEMPERATUREseawaterSALINITYPRESSUREcomparison

分类号： P73[天文地球—海洋科学]