On the asymmetric distribution of heat loss from the Earth'sinterior  

作　　者：Yang Wang Jiyang Wang Zongji Ma 

出　　处：《Chinese Science Bulletin》1998年第18期1566-1570,共0页

基　　金：theKeyProject (GrantNo .KZ95 1_A1_401)oftheChineseAcademyofSci ences

摘　　要：Mean heat flows and heat losses of the Northern and Southern hemispheres are calculated using degree 12 spherical harmonic representation of the global heat flow field (Pollack et al., 1993). Mean heat flows and heat losses of 0° hemisphere and 180° hemisphere, with median lines being 0° longitude and 180° longitude, are also calculated. The mean heat flow of the Southern Hemisphere is 99.3 mW·m -2, significantly higher than that of the Northern Hemisphere (74.0 mW·m -2). The mean heat flow of 0° hemisphere (94.1 mW·m -2) is also higher than the value of 180° hemisphere (79.3 mW·m -2). The mantle heat loss from the Southern Hemisphere is 22.1×10 12 W, as twice as that from the Northern Hemisphere ( 10.8×10 12 W). The 16.9×10 12 W mantle heat loss from 0° hemisphere is close to 16.0×10 12 W from 180° hemisphere. The hemispherical asymmetry of global heat loss is originated by the asymmetry of geographic distribution of continents and oceans. The asymmetric distribution of heat loss is a long-term phenomenon in the geological history.Mean heat flows and heat Josses of the Northern and Southern hemispheres are calculated using degree 12 spherical harmonic representation of the global heat flow field (Pollacket al., 1993). Mean heat flows and heat losses of 0° hemisphere and 180° hemisphere, with median lines being 0° longitude and 180° longitude, are also calculated. The mean heat flow of the Southern Hemisphere is 99.3 mW·m¨, significantly higher than that of the Northern Hemisphere (74.0 mW·m¨). The mean heat flow of 0° hemisphere (94. 1 mW·m2) is also higher than the value of 180° hemisphere (79. 3 mW·m2). The mantle heat loss from the Southern Hemisphere is 22.1 × 1012 W, as twice as that from the Northern Hemisphere (10.8 × 1012 W). The 16.9 × 1012 W mantle heat loss from 0° hemisphere is close to 16.0 × 1012 W from 180° hemisphere. The hemispherical asymmetry of global heat loss is originated by the asymmetry of geographic distribution of continents and oceans. The asymmetric distribution of heat loss is a long-term phenomenon in the geological history.

关 键 词：HEAT FLOW HEAT LOSS from Earth’s INTERIOR Earth’s asymmetry. 

分 类 号：P314[天文地球—固体地球物理学]