1. Department of Earth Sciences “A. Desio”
Our living planet, from the Earth’s surface to the lower mantle
Roberto Sabadini
Department of Earth Sciences “A. Desio”
University of Milano
Italy
LNGS-Italy, February 09th, 2009

3. Lithosphere
Upper Mantle
Lower Mantle
Core
Animazione Plume

4. Satellite data (GRACE, GOCE, GPS,SAR)
Three kinds of data:
Perturbations in the gravitational field
Horizontal surface deformation (GPS)
Vertical surface deformation (SAR)

6. Solid Earth Phenomena:
General Scheme
Satellite
Data
Solid Earth Phenomena:
Model Predictions
comparison
PRESENT DAY MASS
CHANGES
MANTLE VISCOSITY

7. SLR and GRACE
Satellite Laser Ranging

10. August 2002

59. April 2007

60. Periodic Signal
Semi-Annual
Annual
9-month
7.2-month

61. The Map of Mass Variation Trend - Filtered

62. The Post Glacial Rebound
Isostatic Adjustment
core
core
Deglaciation
mantle
mantle
Isostatic Adjustment
core
The Mantle Viscosity drives the Rebound
mantle

63. The Map of Mass Variation Trend - Filtered

64. GRACE up 30 - All

65. Global Problem - Search for best viscosity
nUP = x1020 Pa s
nLW = 1.5x1023 Pa s
Cleaned GRACE

66. BARLETTA V. R. , R. SABADINI AND A
BARLETTA V.R., R. SABADINI AND A. BORDONI, ISOLATING THE PGR SIGNAL IN THE GRACE DATA: IMPACT ON MASS BALANCE ESTIMATES IN ANTARCTICA AND GREENLAND,
GEOPHYSICAL JOURNAL INTERNATIONAL,
DOI: /J X X, 2008.
BARLETTA V.R. AND A. BORDONI, CLEARING OBSERVED PGR IN GRACE DATA AIMED AT GLOBAL VISCOSITY INVERSION: WEIGHETED MASS TRENDS TECHNIQUES,
GEOPHYSICAL RESEARCH LETTERS,
DOI: /2008GL036429, 2009

67. Mediterraneo

69. SAR: acquisizione dati

70. Horizontal principal strain rate tensor
Model B:
active convergence +
subduction forces in the Hellenic (deep slab) and Calabrian arcs
mf = 0.05
Jimenez-Munt, I. et al., Active deformation in the Mediterranean
from Gibraltar to Anatolia inferred from numerical modeling and
Geodetic and seismological data, JGR, 2003

73. Dati SAR – Umbria-Marche (Terremoto 1997)

76. DALLA VIA G. , CRIPPA B. , TORALDO SERRA E. M. , GIACOMUZZI G
DALLA VIA G., CRIPPA B., TORALDO SERRA E.M., GIACOMUZZI G. AND SABADINI R.,
EXPLOITATION OF HIGH-DENSITY DINSAR DATA POINTS OF THE UMBRIA-MARCHE (ITALY) 1997 SEISMIC SEQUENCE FOR FAULT CHARACTERISTICS,
GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L17301, DOI: /2007GL030718,2007

77. Normal mode relaxation theory and new generation space missions:
at the cutting-edge of the
Physics of Earth’s interior