SchoolofEarthandEnvironmentalSciencesSchool of Earth and...
Transcript of SchoolofEarthandEnvironmentalSciencesSchool of Earth and...
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Chapter 5
Gravity
School of Earth and Environmental SciencesSchool of Earth and Environmental SciencesJunkee Rhie
5.2 Gravitational potential and accelerationTheory of gravity
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5.2 Gravitational potential and accelerationTheory of gravity
5.3 Gravity of the EarthGravitational acceleration on the Earth
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5.3 Gravity of the Earth Gravitational acceleration on the Earth
5.3 Gravity of the Earth Orbits of satellites
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5.4 Shape of the EarthThe geoid
5.4 Shape of the EarthThe geoid
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5.4 Shape of the EarthEarth’s gravity anomaly field
5.4 Shape of the EarthGlobal topography (ETOP02)
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5.5 Gravity anomalyGeoid anomaly
5.5 Gravity anomalyFrench Expedition (Pierre Bouger and Everest)
• Try to measure the length of a degree of latitude in Peru and near Pairs in order to determine the shape of the Earth (1735-1745)
)( 21 Rd
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5.5 Gravity anomaly5.5.2 Isostasy
5.5 Gravity anomalyAiry’s hypothesis
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5.5 Gravity anomalyPratt’s hypothesis
5.5 Gravity anomalyAiry vs. Pratt
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5.5 Gravity anomalyGravity corrections
5.5 Gravity anomalyLatitude corrections
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5.5 Gravity anomalyFree-air correction
5.5 Gravity anomalyFree-air anomaly
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5.5 Gravity anomalyAustrailia
5.5 Gravity anomalyBouguer correction
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5.5 Gravity anomalyBouguer anomaly
5.5 Gravity anomalyAustrailia
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5.5 Gravity anomalyIsostatic equilibrium
5.5 Gravity anomalyIsostatic equilibrium
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5.5 Gravity anomalyAustrailia
5.5 Gravity anomaly Buried sphere
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5.5 Gravity anomaly Ambiguity
5.6 Observed gravity and geoid anomaliesMid-ocean ridge
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5.6 Observed gravity and geoid anomalies Ocean trenches
5.6 Observed gravity and geoid anomalies Ocean trenches
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5.6 Observed gravity and geoid anomalies Subduction profiles
5.6 Observed gravity and geoid anomalies Subduction profiles
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5.6 Observed gravity and geoid anomalies Subduction profiles
5.6 Observed gravity and geoid anomalies Geoid height anomalies
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5.6 Observed gravity and geoid anomalies Gravity and convection
5.6 Observed gravity and geoid anomalies Gravity and convection
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5.6 Observed gravity and geoid anomalies Gravity over Hawaii
5.6 Observed gravity and geoid anomalies Lithospheric flexure
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5.6 Observed gravity and geoid anomalies The elastic plate
5.6 Observed gravity and geoid anomalies The elastic plate
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5.6 Observed gravity and geoid anomalies The elastic plate
5.6 Observed gravity and geoid anomalies Elastic thickness of oceanic plates
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5.6 Observed gravity and geoid anomalies Isostatic rebound
5.6 Observed gravity and geoid anomalies Isostatic rebound
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5.6 Observed gravity and geoid anomalies Isostatic rebound
Measuring GravityGRACE (Gravity Recovery And Climate Experiment)
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Measuring GravityGRACE (Gravity Recovery And Climate Experiment)
• Global ocean circulation
• Slow current of Magma
• Thinning of ice sheets
• Earthquake
• and much more
Earth’s Gravity Field Anomaly