Fluid upwelling at the core--mantle boundary -- resolvability from surface geomagnetic data
نویسندگان
چکیده
منابع مشابه
Geomagnetic spikes on the core-mantle boundary
Extreme variations of Earth's magnetic field occurred in the Levant region around 1000 BC, when the field intensity rapidly rose and fell by a factor of 2. No coherent link currently exists between this intensity spike and the global field produced by the core geodynamo. Here we show that the Levantine spike must span >60° longitude at Earth's surface if it originates from the core-mantle bound...
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(1) Introduction.-In this paper, the values of variables at the base of the mantle and top of the core in the Earth models to be considered will be indicated by the subscripts 1 and 2, respectively; k and p will denote the incompressibility and density; let Ak = k2ki and Ap = p2 pi. In an earlier Earth model,1 Model A, k1 = 6.5 X 1012 dyn/cm2 and k2 = 6.2 X 1012 dyn/cm2, giving Ak = -0.3 X 1012...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1984
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1984.tb01960.x