Heat Flux Anomalies in Antarctica Revealed by Satellite Magnetic Data | Zendy

Cathrine Fox Maule | Zendy; Michael E. Purucker | Zendy; Nils Olsen | Zendy; Klaus Mosegaard | Zendy

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Heat Flux Anomalies in Antarctica Revealed by Satellite Magnetic Data

Author(s) -

Cathrine Fox Maule,

Michael E. Purucker,

Nils Olsen,

Klaus Mosegaard

Publication year - 2005

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1106888

Subject(s) - heat flux , sea ice growth processes , geology , flux (metallurgy) , volcanism , sea ice thickness , geophysics , geothermal heating , ice sheet , satellite , cryosphere , sea ice , atmospheric sciences , geothermal gradient , climatology , heat transfer , geothermal energy , oceanography , materials science , physics , mechanics , paleontology , astronomy , metallurgy , tectonics

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.

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