Earth sciences overview. Chris Paola [email protected] 4-8025 SAFL & Pills 30b. Plan for next two weeks. Today: overview of earth sciences Friday: Nonlinearity and nonequilibrium case examples Monday: paleoclimate (with Emi Ito) Friday: ESci connections to other fields.
The theory describing plate deflection is identical to that used for beams in structural engineering!
An example of a “power law” – a common distribution
Rio Salado, NM
New research made possible by new measurement techniques
Dating methods for surface materials and short time scales
Cosmogenic radionuclides (CRN)
High res 3D seismic reflection
Circular orbit, no eccentricity.
Orbit with 0.5 eccentricity
Periods: 413,000, 95,000, and 136,000 years. Overall dominant ~ 100,000 year cycle
Range: -0.03 to +0.02).
Present value: 0.017.
2. Axial tilt (obliquity)
Period: 40,000 years
Range: 2.4 degrees
Present value: 23.44 degrees
Period: 20,000 years
Range: entire orbit
Present value: perihelion during SH summer, aphelion during NH summer
Vostok ice core data