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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Magnetic field stretching at the top of the shell of numerical dynamos

Fig. 2

Intense high-latitude normal polarity magnetic flux patch (HN) in dynamo model 4 (upper polygon in Fig. 1a). a Radial magnetic field \(B_r\) (in colors) and tangential velocity \(\vec {u}_h\) (black arrows), b frozen-flux secular variation SV, c radial vorticity \(\omega _r\), d tangential divergence \(\delta _h\), e advective SV and f stretching SV. The local statistics for this patch are: \({\text {St}}/{\text {Ad}} = 2.01\); \({\mathcal {P}}/{\mathcal {T}}=0.23\); \(H_u=0.97\); \({\text {corr}}(|B_r|,\delta _h^-)=0.71\); \({\text {corr}}(|B_r|,\delta _h^+)=-0.36\); \(\xi _{\text {a}}=0.66\); \(\xi _{\text {s}}=0.80\); \(\xi _{\text {e}}=0.94\)

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