Chapter 14: Glacial and Periglacial Landforms A friend tells you that global war
ID: 119265 • Letter: C
Question
Chapter 14: Glacial and Periglacial Landforms A friend tells you that global warming is part of a natural Earth cycle. Referring to Milankovitch theory, give a response that explains the dfference between natural cycles of glaciation and curment global climate change. Be sure to pay attention to the formatting guidelines provided below FORMATTING GUIDELINES: YOUR COMPLETED ASSIGNMENT SHOULD BE WRITTEN IN PARAGRAPH FORM TIMES NEW ROMAN, 12 POINT FONT, DOUBLE-SPACED. ASSIGNMENT SHOULD BE AT LEAST ONE FULL PAGE (NOT INCLUDING TITLE, NAME DATE, ETC.). AS ALWAYS, PLEASE LET ME KNOW IF YOU HAVE ANY QUESTIONS!Explanation / Answer
Difference between cycle of glaciation and current global climate change .
Geological records stretching back millions of years indicate a number of large variations in Earth’s climate. These have been caused by many natural factors, including changes in the sun, volcanoes, Earth’s orbit and CO2 levels. This shows that Global warming is part of natural cycle of glaciation which causes change in climate.
Milankovich cycles theory referred as the natural earth cycle for change in climate which is caused by changes In the shape of the Earth's orbit around the sun, the tilt of the Earth's rotation axis, and the wobble of our axis. The mass and movement of the other planets in our solar system actually affect the Earth orbit just as our planetary mass similarly affects their orbits.
As the Earth's orbit changes, so too does the amount of sunlight that falls on different latitudes and in seasons. The amount of sunlight received in the summer at high northern latitudes appears to be especially important to determining whether the Earth is in an ice age or not. When the northern summer sun is strong, the Earth tends to be in a warm period. When it is weak we tend to be in an ice age.
Warming from the sun would heat all of the atmosphere, including the lowest few kilometres (the troposphere) and the layer above (the stratosphere). Observations show that the stratosphere is in fact cooling while the troposphere warms. This is consistent with greenhouse gas heating and not solar heating.
However Current change in climate , researched by the Intergovernmental Panel on Climate Change (IPCC) shows that it is 90% likely due to human activity which caused more recent global warming.
Evidence that CO2 emissions are the cause of global warming is very robust. Scientists have known that gases in the atmosphere trap heat which causes change in climate.
Global CO2 emissions from human activity have increased by over 400% . As a result, the concentration of CO2 in the air has reached more than 400 parts per million by volume (ppm).
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