[悦毒]石悦拾好悦毒寂静+木寻云整理版已出（共52只，更新11/7-14:43）

zoraaaa09

谢谢！！

msteresabai

ouyangyijin

55555

mtryshy

最好不加密,加密IPAD就看不了了

philyhai

xiexie

当当米

走了

philyhai

of heat loss from the core is suf?cient to maintain the
magnetic ?eld at its present intensity. However, that rate
of core cooling implies the inner core would have been
growing relatively rapidly, and that it began to solidify less than 2 Ga ago (Labrosse et al., 2001). This in
turn means that before the inner core formed only thermal convection would have been available to drive the
dynamo, and a purely thermally driven dynamo would
require a larger heat ?ow to maintain it (Gubbins et al.,
2003). This leads ?nally to the implication that the core
was hotter in the past than seems reasonable (Buffett,
2002; Nimmo et al., 2004). Core radioactivity would
resolve this dilemma by allowing suf?cient heat ?ow
to drive the dynamo without implying rapid cooling of
the core, and therefore without implying excessive core
temperatures in the past.

panrogers

UP

mb05436

十月19号考试的前来膜拜

liummm1221

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