Dopo avere descritto le caratteristiche fisiche del territorio dell'alta pianura modenese, in... more Dopo avere descritto le caratteristiche fisiche del territorio dell'alta pianura modenese, in particolare gli aspetti idrogeologici, la presente nota individua le cause dei fenomeni di inquinamento a carico delle acque di falda, le modalit\ue0 di diffusione degli inquinanti nel sottosuolo ed i criteri di valutazione della vulnerabilit\ue0 territoriale. I rischi pi\uf9 elevati di contaminazione delle risorse idriche sotterranee derivano attualmente dall'inadeguato smantellamento dei liquami suini
We derive 3‐D tomographic maps of the Earth's mantle, CMB and outer core, from seismic P, PcP... more We derive 3‐D tomographic maps of the Earth's mantle, CMB and outer core, from seismic P, PcP, PKPbc, PKPdf travel time data, based on the bulletins of the International Seismological Centre (1964–1995), after source relocation by Antolik et al. [2001] and phase re‐identification by Engdahl et al. [1998]. Maps of the CMB derived independently from core‐reflected (PcP) or core‐refracted (PKP) phases are not well correlated. We attempt to explain this discrepancy, and study the radial coherence of whole‐Earth tomographic images, to identify possible trade‐offs between CMB undulations and velocity anomalies in the mantle or outer core. Imaged velocity anomalies in the lowermost mantle are anticorrelated with the topography of the CMB; likewise, imaged lateral heterogeneities in the outer core are correlated with the topography of the CMB. This, together with the study of Piersanti et al. [2001], suggests that the core anomalies might not be entirely fictitious.
Despite the fast advances of seismic tomography in the last decades provided us with very clear a... more Despite the fast advances of seismic tomography in the last decades provided us with very clear and reliable images of the Earth's mantle,seismically and/or geodynamically inferred models of core-mantle boundary topography are still poorly correlated both in pattern and amplitude. A major cause for these discrepancies is the difficulty to separate, in travel-time anomalies, the contribution of CMB topography from that of lowermost-mantle and D" heterogeneities. As an attempt to reconcile the contrasting views of the Earth's CMB, we propose an innovative approach to mapping CMB topography from seismic travel-time inversions: instead of treating mantle velocity and CMB topography as independent parameters, as has been done so far (e.g., Soldati et al., 2003), we plan to account for their coupling by mantle flow, as formulated by e.g. Forte & Peltier (1991). In practice, we shall invert direct P waves, and core-sensitive phases, with coefficients of mantle (and, possibly...
Dopo avere descritto le caratteristiche fisiche del territorio dell'alta pianura modenese, in... more Dopo avere descritto le caratteristiche fisiche del territorio dell'alta pianura modenese, in particolare gli aspetti idrogeologici, la presente nota individua le cause dei fenomeni di inquinamento a carico delle acque di falda, le modalit\ue0 di diffusione degli inquinanti nel sottosuolo ed i criteri di valutazione della vulnerabilit\ue0 territoriale. I rischi pi\uf9 elevati di contaminazione delle risorse idriche sotterranee derivano attualmente dall'inadeguato smantellamento dei liquami suini
We derive 3‐D tomographic maps of the Earth's mantle, CMB and outer core, from seismic P, PcP... more We derive 3‐D tomographic maps of the Earth's mantle, CMB and outer core, from seismic P, PcP, PKPbc, PKPdf travel time data, based on the bulletins of the International Seismological Centre (1964–1995), after source relocation by Antolik et al. [2001] and phase re‐identification by Engdahl et al. [1998]. Maps of the CMB derived independently from core‐reflected (PcP) or core‐refracted (PKP) phases are not well correlated. We attempt to explain this discrepancy, and study the radial coherence of whole‐Earth tomographic images, to identify possible trade‐offs between CMB undulations and velocity anomalies in the mantle or outer core. Imaged velocity anomalies in the lowermost mantle are anticorrelated with the topography of the CMB; likewise, imaged lateral heterogeneities in the outer core are correlated with the topography of the CMB. This, together with the study of Piersanti et al. [2001], suggests that the core anomalies might not be entirely fictitious.
Despite the fast advances of seismic tomography in the last decades provided us with very clear a... more Despite the fast advances of seismic tomography in the last decades provided us with very clear and reliable images of the Earth's mantle,seismically and/or geodynamically inferred models of core-mantle boundary topography are still poorly correlated both in pattern and amplitude. A major cause for these discrepancies is the difficulty to separate, in travel-time anomalies, the contribution of CMB topography from that of lowermost-mantle and D" heterogeneities. As an attempt to reconcile the contrasting views of the Earth's CMB, we propose an innovative approach to mapping CMB topography from seismic travel-time inversions: instead of treating mantle velocity and CMB topography as independent parameters, as has been done so far (e.g., Soldati et al., 2003), we plan to account for their coupling by mantle flow, as formulated by e.g. Forte & Peltier (1991). In practice, we shall invert direct P waves, and core-sensitive phases, with coefficients of mantle (and, possibly...
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Papers by G. Soldati