5 Gold Qs
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How has the average global surface temperature on the earth ever been as warm as it is now?
Yes, there were warmer periods, such as the Neoproterozoic geologic period. The concern now is that it is warming too quickly
Describe the types of variables in mathematical models scientists use to predict future average global surface temperature changes
Amount of permafrost melting Ocean currents Amount of land cover Reflecting and absorbing Solar energy Solar cycles Orbital cycles Cloud cover
Explain the positive feedback created by the melting of permafrost
Permafrost is a soil that is frozen for at least 2 years straight. The melting of permafrost release a lot of greenhouse gases like CO2 and Methane, which will cause the earth to heat up and then cause more permafrost to thaw. (creating a positive feedback loop
Explain how the Milankovitch Cycle affects global climate
The Milankovitch Cycle includes, Eccentricity (Subtle changes in orbital path ( every 100,000 yrs); Obliquity (Change of tilt of axis (every 40,000 yrs) and Precession (wobbling around the axis (every 25000 years) The cycle examines how these factors of Earth’s movement affect the amount of solar energy touches the top of Earth. Therefore, demonstrating how these variables affect the global climate
Describe ecological succession after a new nieghborbood is built
Initial lost of biodiversity Bring in non-native species (plants) Some biodiversity returns as neighborhood ages Some more biodiversity with Bio-reconccilulation However, never returns to previous levels Home owners continue to fight succession (mowing laws, weeding, removing unwanted animals) If they stop, nature will eventually reclaim the area