Maule Cathrine Fox, Purucker Michael E, Olsen Nils, Mosegaard Klaus
Center for Planetary Science, Juliane Maries vej 30, 2100 Copenhagen Oe, Denmark.
Science. 2005 Jul 15;309(5733):464-7. doi: 10.1126/science.1106888. Epub 2005 Jun 9.
The geothermal heat flux is an important factor in the dynamics of ice sheets; it affects the occurrence of subglacial lakes, the onset of ice streams, and mass losses from the ice sheet base. Because direct heat flux measurements in ice-covered regions are difficult to obtain, we developed a method that uses satellite magnetic data to estimate the heat flux underneath the Antarctic ice sheet. We found that the heat flux underneath the ice sheet varies from 40 to 185 megawatts per square meter and that areas of high heat flux coincide with known current volcanism and some areas known to have ice streams.
地热通量是冰盖动力学中的一个重要因素；它影响着冰下湖泊的形成、冰流的起始以及冰盖底部的质量损失。由于在冰雪覆盖地区很难获得直接的热通量测量数据，我们开发了一种利用卫星磁数据来估算南极冰盖下热通量的方法。我们发现，冰盖下的热通量在每平方米40至185兆瓦之间变化，且高热通量区域与已知的当前火山活动区域以及一些已知有冰流的区域相吻合。
