Climate Change: Shifting Glaciers, Deserts, and Climate by Timothy M. Kusky

By Timothy M. Kusky

The Earth has skilled many episodes of dramatic weather swap through the years. Scientists warn that the planet is at present changing into hotter at a fast speed and there'll be major effects for the folk and ecosystems. How people reply to international warming is essential for his or her survival amid the becoming probability of relocating coastal towns, migrating crop belts, altering weather zones, and ranging river stipulations. a radical exam of the weather historical past of the earlier million years might help expect and change the direction for the longer term.

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Extra info for Climate Change: Shifting Glaciers, Deserts, and Climate Belts (The Hazardous Earth)

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This phenomenon is also associated with a reversal of the atmospheric circulation around the Pacific such that the dry downwelling air is located over Australia and Indonesia, and the warm upwelling air is located over the eastern Pacific and western South America. The arrival of El Niño is not good news in Peru, since it causes the normally cold upwelling and nutrient rich water to sink to great depths, and the fish either must migrate to better feeding locations or die. The Natural Medium- and Short-term Climate Change 33 View of the remains of the town of Santa Teresa, Peru, 310 miles (500 km) southeast of Lima in the Andes.

It apparently formed in two intervals, at 122 and 90 million years ago, entirely within the ocean, and represents magma that rose in a plume from deep in the mantle and erupted on the seafloor. It is estimated that the volume of magma erupted in the first event was equivalent to that of all the magma being erupted at mid-ocean ridges at the present time. Sea levels rose by more than 30 feet (9 m) in response to this volcanic outpouring. The gases released during these eruptions are estimated to have raised average global temperatures by 23°F (13°C).

The shape or eccentricity of Earth’s orbit around the Sun changes with a cycle of 100,000 years, leading to alternating warmer and colder periods on Earth. The obliquity of the tilt of the rotational axis alternates with a frequency of 41,000 years, also leading to variations in the amount of incoming solar radiation in different hemispheres in different seasons. The precession, or direction that the tilt axis is inclined relative to the Sun in different seasons, changes with two frequencies of 19,000 and 23,000 years.

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