![]() ![]() What is the fastest and slowest rate of temperature change during past 4.5 billion years? To do this find adjacent Hothouse peaks and Icehouse valleys.During the past 4.5 billion when were the low temperature valleys? These represent the depth of Icehouse episodes.During the past 4.5 billion years when were the high temperature peaks and what was the average global temperature at those peaks? These points on the graph represent the height of Hothouse episodes.Finally use the timeline to answer the following questions… This is located in the upper right corner of the mobile app version and lower left quadrant of the web version. Next display the temperature graph by clicking on the charts button. When the viewer appears set its timescale to “Ancient Earth”. ![]() Impacts – Asteroid or large meteorite collisions.Īctivity A – Hothouse / Icehouse Episodesīegin by launching Earth Viewer.Solar luminosity – The amount of energy received by the earth.CO 2 – The amount of carbon dioxide in the atmosphere in ppm (parts per million).Geography – The location and shape of the continents.Key factors that appear in Earth Viewer that you will experiment with include the following… One of the goals of the following activities is investigate what other changes take place during these episodes.Īnother goal of the following activities is to examine what causes these episodes. During hothouse episodes annual average temperature rises sufficiently that global ice becomes negligible or even disappears. In general, this history alternates between cold, dry periods referred to as icehouse and much warmer, wetter periods called hothouse.ĭuring icehouse episodes annual average global temperature falls enough that global ice (glaciers, sea ice, tundra, and ice caps) expands significantly. The bulk of the evidence available to paleoclimatologists (researchers who study past climate) indicates that this is certainly true when it comes to climate history. Earth Viewer from the Biointeractive program at the Howard Huges Medical InstituteĪn old adage is that the only constant in the universe is change.How ha ve sea level and global ice been impacted by these changes?.What is the range of climate change that has taken place on this planet?. ![]()
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