【摘要】 北极海及海岸后退对近海岸冻土温度影响的数学模拟表明:加拿大北极西部广泛分布着海底冻土,陆地冻土被淹没变为海底冻土后,其热状况在10000a内都不会恢复至自然状态,并且冻土上部的温度上升最明显。尽管海底冻土厚度会很大,而其温度较高,其中含有一定厚度的残余冻土。海底冻土的分布取决于海底平均温度与海底冻土上限处温度的关系。更多还原

【Abstract】 A numerical model is used to simulate the thermal regimes of subsea permafrost under the influence of coastal retreat and the presence of the Arctic Ocean, Western Canadian Arctic. The result shows: 1) Subsea permafrost is widespread in the continental shelf, Western Canadian Arctic; 2) The recovery of ground thermal regimes of submerged permafrost is a long process, and certain relict permafrost exists beneath the sea bed; 3) Most significant increase in temperature occurs in the upper layer of the submerged permafrost; 4) Subsea permafrost is of high temperature which has considerable implications for the construction of the offshore oil / gas pipeline.更多还原