Figure F7. Spectral map for (A) the December insolation signal converted to a depth scale using Hole 1096C age model. The horizontal and vertical axis represent, respectively, the depth and the wavenumber. The color scale goes from blue (high negative modulus, which corresponds to a trough in the signal) to red (high positive modulus, which corresponds to a peak in the signal). Note that we modified the modulus color scale to eliminate the nonsignificant wavenumbers (see Torrence and Compo, 1998). For that, we attributed the white color to the low modulus absolute values. The real part is represented here. The diagrams on the left display the modulus of the wavelet transform vs. wavenumber; wavenumber for a chosen depth specified on the spectral map by a vertical gray line. The diagram under the map displays in blue the processed signal, and in black, the periodic signal for a chosen wavenumber specified on the spectral map by an horizontal gray line. On the spectral map A, the green, pink, and blue lines, respectively, represent the Milankovitch 100-, 40-, and 20-k.y. periods, computed using the age model deduced from paleomagnetic data. The frequency resolution used here for the wavelet transform is 0.01 cycles/m, instead of 0.002 cycles/m (see "Time-Frequency Analysis Results and Discussion," ). (B) Signal truncated at 510 W/m2 and (C) core magnetic susceptibility, Hole 1095B.

Figure F7. Spectral map for (A) the December insolation signal converted to a depth scale using Hole 1096C age model. The horizontal and vertical axis represent, respectively, the depth and the wavenumber. The color scale goes from blue (high negative modulus, which corresponds to a trough in the signal) to red (high positive modulus, which corresponds to a peak in the signal). Note that we modified the modulus color scale to eliminate the nonsignificant wavenumbers (see Torrence and Compo, 1998). For that, we attributed the white color to the low modulus absolute values. The real part is represented here. The diagrams on the left display the modulus of the wavelet transform vs. wavenumber; wavenumber for a chosen depth specified on the spectral map by a vertical gray line. The diagram under the map displays in blue the processed signal, and in black, the periodic signal for a chosen wavenumber specified on the spectral map by an horizontal gray line. On the spectral map A, the green, pink, and blue lines, respectively, represent the Milankovitch 100-, 40-, and 20-k.y. periods, computed using the age model deduced from paleomagnetic data. The frequency resolution used here for the wavelet transform is 0.01 cycles/m, instead of 0.002 cycles/m (see "Time-Frequency Analysis Results and Discussion"). (B) Signal truncated at 510 W/m² and (C) core magnetic susceptibility, Hole 1095B.