Milankovitch Cycles and Rainshadow Effect - Due Tuesday March 1
Milankovitch Cycles and Rainshadow Effect - Due Tuesday March 1 ISB 201
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This 1 page Bundle was uploaded by chloegrignon on Wednesday February 10, 2016. The Bundle belongs to ISB 201 at Michigan State University taught by Dr. Gabe Ording in Fall 2015. Since its upload, it has received 41 views. For similar materials see Insects, Globalization, and Sustainability in Entomology at Michigan State University.
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Date Created: 02/10/16
Milankovitch Cycles and Rainshadow Effect 1. Conduct research and clearly explain what Milankovitch Cycles are and how EACH of them is thought to impact global climate. Be sure to include in your discussion issues associated with temporal scale. Milankovitch was a Serbian scientist and astronomer who created the Milankovitch Cycles. This cycle is involved in the period of ice age, and deals with glaciation and inter glaciation caused by circumnavigation if the sun by the earth. It impacts the seasons and location of solar energy. Eccentricity is the cycle in which the shape of the earth’s orbit around the sun. This cycle varies and has been going on for about 100,000 years. The shape of the orbits changes, and that can increase the distance from the sun, reducing the radiations that reaches the earth during each season. Orbital eccentricity is at its minimum, meaning more radiation is reached. The next stage is axil tilt, which is the tilt of the earth on its axis, in regards to the plane of orbit around the sun. The tilt today is 23.5 degrees, which mean less evenly dispersed radiation. When there’s less tilt, more radiation difference between equator and polar areas occurs, and more evenly dispersed radiation. The last cycle is precession, which is the movement of wobbling earth as it spins on its axis. When the axis is tilted north at Vega, the northern hemisphere will have winter and the southern will have summer, resulting in natural climate and seasonal contrasts. Axil tilt and precession both influence the earth’s axis which then influence season changes in temperature Axil tilt will increase temperature as the tilt increases. 2. Conduct research and clearly describe how it is thought that Plate Tectonics and the Orographic Effect (look it up) may actually have helped to drive Human Evolution. Plate tectonics went through their natural movements, set in Africa, shifting and uplifting mountains, pushing and moving the crust into plateaus, and absorbing solar energy which results in bigger and stronger convection currents. Hot air was absorbed from the oceans, resulting in differing climates because of the dry east Africa, and Asia, which is the split in evolution. The orographic effect is when low masses of air are pushed into a higher elevation area, cooling, and resulting in humidity. This could have resulted in a climate that has lots of variation, and resulted in an expansion of human development and growth. This varied temperature allowed for climates to produce favorable living conditions between cycles of climate.
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