There are factors that need to be taken into account when looking at global climate change besides human impact such as: The earth's orbit, the output of the sun, or catastrophic events in the past.
Changes in the Earth's orbital geometry
There can be an increase in the earth's temperature by up to 1% if the tilt of the earth, the amount it wobbles and the different angles of the orbit. This is what may have caused the ice ages in the past.
Changes in solar output
the sun changes its solar output, however slightly, still affecting the Earth's temperature slightly. This can increase or decrease the earth's temperature.
Catastrophic events
There are catastrophic events in the world such as volcanic eruptions or meteor showers which crash to the earth causing temperature increases. These catastrophic events have also lead to believe to the extinction of prehistoric animals such as dinosaurs. One of these volcanic eruptions occurred in Iceland causing the largest lava waves in thousands of years in addition to millions of tonnes poisonous gas being released.
Changes in the Earth's orbital geometry
There can be an increase in the earth's temperature by up to 1% if the tilt of the earth, the amount it wobbles and the different angles of the orbit. This is what may have caused the ice ages in the past.
Changes in solar output
the sun changes its solar output, however slightly, still affecting the Earth's temperature slightly. This can increase or decrease the earth's temperature.
Catastrophic events
There are catastrophic events in the world such as volcanic eruptions or meteor showers which crash to the earth causing temperature increases. These catastrophic events have also lead to believe to the extinction of prehistoric animals such as dinosaurs. One of these volcanic eruptions occurred in Iceland causing the largest lava waves in thousands of years in addition to millions of tonnes poisonous gas being released.
Solar Output
ReplyDeleteBasic Answer: Mention how the solar output is constant, but sometimes changes slightly in energy transfer.
Good answer: State how the solar output is constant with a slight change in energy transfer causing a great increase or decrease in global temperature
Excellent answer: Describe how these 2 factors combined can either cancel each other out or cause for an even greater increase or decrease in the Earth's global temperature.
Catastrophic events such as volcanic eruptions can alter the climate of the Earth for both short and long periods of time. For a short period of time volcanic dust is blasted into the atmosphere causing temporary cooling. Then for a few minutes particles the size of sand-grains fall out of the air having little effect on the climate.
ReplyDeleteGood answer, maybe include the extinction of animals and give examples of when this may have happened in the past and how it has affected the region.
DeleteCatastrophic events
ReplyDeleteBasic Answer: State how volcanic events and collisions between the earth and large extraterrestrial objects may increase or decrease the Earth's temperature.
Good Answer: Describe how these volcanic activities and collision can cause can increase or decrease in temperature of the Earth.
Excellent Answer: Give examples of these volcanic events and their increase in temperature. Mention how they have led to believe of the extinction of prehistoric animals from the Cretaceous period.
Catastrophic events: laki volcano eruption iceland 1783
ReplyDeleteThe laki event produced an ash cloud that have reached up into the stratosphere. The cloudcaused a dense haze across Europe that dimmed the sun, The eruptive cloud has vast quantities of sulfur dioxide, hydrogen chloride, and hydrogen fluoride gases. The gases combined with water in the atmosphere will produce acid rain, destroying crops and killing livestock.
Stratosphere
http://spark.ucar.edu/sites/default/files/images/large_image_for_image_content/stratosphere_diagram_big.jpg
https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSTLpDhlso600sqp3uyhAiEFln_e8J8rggc3TYuT3hHLrOekqdo6g
Excellent answer, good including an example, maybe next time include animal extinctions.
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ReplyDeleteVolcanic eruptions can enhance three climate effects to variable degrees. They are the ozone effect, the haze effect and the green house gases. They contribute to ozone depletion, as well as to both cooling and warming of the earth's atmosphere. The role of volcanic eruptions on each climate effect.
ReplyDeleteGood answer, it would be better if you could include an example like the volcanic eruption in Laki
DeleteComponents of orbital geometry - Eccentricity
ReplyDeleteThe path of the earth around the sun is slightly elliptical, rather than circular. The eccentricity of the ellipse changes periodically with time, with components having periods of ~100 ky and ~413 ky. The eccentricity is defined as the ratio of the focal length of the ellipse (the distance between the foci) to the length of its major axis; the eccentricity of the earth's orbit about the sun has ranged from less than 0.01 to more than 0.05 over the past 600 ky.
Excellent answer, including detail and examples.
DeleteHey dudes, GO ON PAGE 32 AND ANSWER THE QUESTION " EXPLAIN WHY HIGHER LEVELS OF GREENHOUSE GASES CAUSE A RISE IN GLOBAL TEMPERATURES" We will give you 4 minutes to answer this question. After the 4 minutes me and my two assistants will go over them. Thank you and good bye.
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