CAJ | 학술논문

全球地表热流是反映地球内部热与动力学过程的一种主要能流. 本文在三维球坐标框架下，就几个不同的粘度模型分别研究地幔内部密度异常(基于全球地震层析结果)以及板块运动激发的地幔流动的热效应及其对于观测地表热流产生和分布特征的贡献. 由于地幔动力系统具有较高的Pe数，可以期望由板块运动激发的地幔流动将强烈地扰动地幔内部初始传导状态下的温度场以及地表热的热流分布. 结果表明，与地幔内部密度异常产生的热效应相比，运动的板块及其激发的地幔流动在全球地表观测热流的产生和分布特征上起着更为重要的作用. 观测到的大洋中脊处的高热流在很大程度上可以归因于板块激发的地幔流动的热效应. 计算的平均温度剖面较好地揭示了岩石圈和D″层的温度特征，即温度随深度的剧烈变化，这与我们目前通过其他手段对岩石圈和D″层的温度结构了解是一致的. 一个下地幔粘度比上地幔高出30倍的粘度结构(文中使用的粘度模型2)较之其余模型的拟合程度似乎更好.
전구지표열류시반영지구내부열여동역학과정적일충주요능류. 본문재삼유구좌표광가하，취궤개불동적점도모형분별연구지만내부밀도이상(기우전구지진층석결과)이급판괴운동격발적지만류동적열효응급기대우관측지표열유산생화분포특정적공헌. 유우지만동력계통구유교고적Pe수，가이기망유판괴운동격발적지만류동장강렬지우동지만내부초시전도상태하적온도장이급지표열적열류분포. 결과표명，여지만내부밀도이상산생적열효응상비，운동적판괴급기격발적지만류동재전구지표관측열류적산생화분포특정상기착경위중요적작용. 관측도적대양중척처적고열류재흔대정도상가이귀인우판괴격발적지만류동적열효응. 계산적평균온도부면교호지게시료암석권화D″층적온도특정，즉온도수심도적극렬변화，저여아문목전통과기타수단대암석권화D″층적온도결구료해시일치적. 일개하지만점도비상지만고출30배적점도결구(문중사용적점도모형2)교지기여모형적의합정도사호경호.
The globle heat flow is the primary energy flow responsible for the dynamic of nature of our planet. In this study we investigate in a three dimensional spherical geometry frame, the generation and distribution characteristics of global heat flow on the basis of exploring thermal effects of density anomaly and platedriven mantle flows. Results show that the thermal effect of plate motion-driven mantle flow and its contribution to the observed heat flow is greater than that due to internal density anomaly (tomography based). Higher values of observed heat flow in mid-ocean ridge system could be accuounted for, to a great extent, by the thermal effect generated by the plate-driven mantle flow. Furthermore, the predicted average temperature as function of depth reveals the features of an isothermal core and two thermal boundary laters at the surface and the core-mantle boundary. An approximate thickness of 150km for lithosphere within which the temperature rapidly varies can be obtained. A mantle viscosity model, in which viscosity in the lower mantle is 30 times than that in the upper mantle, appears to fit data better.