极地研究2025，Vol.37Issue(3)：532-540,9.DOI:10.13679/j.jdyj.20230064
中低频下盐水冰介电常数试验研究
Experimental study of the brine ice dielectric constant at low and medium frequencies
摘要
Abstract
Sea ice is melting rapidly in the Arctic region,and further monitoring of the ice situation in the polar region is critical.The dielectric constant is an important parameter for remote sensing monitoring of sea ice.This study utilizes a cryogenic laboratory to investigate the relationship between the dielectric and physical properties of sea ice and quantitatively analyze the dominant factors affecting changes in the dielectric con-stant of sea ice under different conditions.The air temperature of the polar region is simulated to test the dielectric and physical properties of artificially frozen brine ice within a frequency range of 80 kHz～50 MHz.The investigation is focused on changes in the dielectric constant of brine ice with frequency,ice tempera-ture,and salinity with increasing temperature(from-45℃to-15℃),and the effects of different factors on the dielectric constant are assessed using correlation analysis.The results show that the dielectric constant of brine ice is positively correlated with ice temperature and salinity,and increases by～1.5 for every 10℃increase in ice temperature.Furthermore,it is negatively correlated with frequency,with higher salinity lowering the rate of change.Finally,the test results are used to establish a dielectric constant prediction model for pure ice and brine ice,yielding R 2 values of 0.75 and 0.68,P-values of 0.005 and 0.008,root mean square error values of 1.1 and 3.4,and residual sum of squares values of 40 and 127,respectively.The model fitting effect is improved,the regression effect is significant,and the accuracy requirements are met.This indicates that it is feasible to invert the dielectric constant of polar sea ice through physical properties,and that polar sea ice can be monitored via the relationship between its physical and dielectric properties.关键词
盐水冰/介电性能/中低频/物理性质/预测模型/北极海冰Key words
saline ice/dielectric properties/low and medium frequencies/physical properties/predictive model/Arctic sea ice引用本文复制引用
张楠,常晓敏,左广宇,贾治学,窦银科..中低频下盐水冰介电常数试验研究[J].极地研究,2025,37(3):532-540,9.基金项目
国家重点研发项目(2022YFC2807601)和山西省应用基础研究计划(20210302124054)资助 （2022YFC2807601）
