极地研究2026，Vol.38Issue(1)：73-83,11.DOI:10.13679/j.jdyj.20240074
冰下融水层对海冰融化影响的试验研究
Experimental study on the influence of subglacial melting layer on sea ice melting
摘要
Abstract
The melting of Arctic summer sea ice is accelerating,and studies have shown that the ice melting pool significantly contributes to the positive feedback effect of sea ice melting.However,there is relatively little research on the ice melting layer and its impact on sea ice melting.This study used a low-temperature labor-atory to simulate the temperature in the polar region,and conducted experimental research on the effect of different thicknesses of ice meltwater layers under 20 cm and 40 cm of ice on the melting of overlying arti-ficially frozen 20-cm-thick saline water at an ambient temperature of 10℃The heat flux at the ice water interface was also analyzed.The results indicated that:(1)the depth of the freshwater layer was positively associated with the speed at which the saltwater ice melted.Under laboratory conditions,the average melting rate of the freshwater layer was 0.115 cm·h-1 at a depth of 20 cm and 0.140 cm·h-1 at a depth of 40 cm,re-sulting in a difference of approximately 17.86%.(2)The overall average water temperature of the freshwater layer at a depth of 40 cm varied more uniformly over time compared with that of the freshwater layer at a depth of 20 cm.(3)The latent heat flux of the freshwater layer was 92.4 J·(s·m2)-1 at a depth of 20 cm and 112.4 J·(s·m2)-1 at a depth of 40 cm,resulting in a difference of approximately 17.8%.The melting process was mainly affected by the latent heat flux.The study findings indicated that the depth of the ice melting layer had a certain impact on the melting of overlying sea ice.This information will provide support for further research on the evolution of Arctic sea ice melting pools.关键词
冰下融水层/融化速率/温度分布/热通量/北极海冰Key words
subglacial melting layer/melting rate/temperature distribution/heat flux/Arctic sea ice引用本文复制引用
贾治学,常晓敏,左广宇,陈宣豪,窦银科..冰下融水层对海冰融化影响的试验研究[J].极地研究,2026,38(1):73-83,11.基金项目
国家重点研发计划子课题(2021YFC2803304)、山西省基础研究计划项目(20210302124318)和山西省应用基础研究计划项目(20210302124054)资助 （2021YFC2803304）
