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CSU - NR 130 - Study Guide - Midterm

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Schools > Colorado State University > Natural Resources > NR 130 > CSU - NR 130 - Study Guide - Midterm

CSU - NR 130 - Study Guide - Midterm

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background image Global Environmental Systems Exam 3 Study Guide  The obliquity cycle (the Earth's tilt) fluctuates between what angles during its 41,000 year cycle? ­ 21.5 to 24.5 degrees. Sunspots ­    May be one of the causes for global climate changes How many climate groups are in the Climate Classification System? ­    Five   Based on the study of past climate, we can conclude that future, long term climates will be ­    Variable.   The 41,000 year cycle of the tilt of the Earth's axis is called the ­ Obliquity (tilt) cycle.  
What would be the greatest effect to climate from the movement of continents via plate 
tectonics? ­ Changes to thermohaline circulation. The 1990s and 2000s were the coolest decades on record. ­    False   The Medieval Warm Period  ­    Began before the Little Ice Age What is the Milankovitch Cycle? - An explanation of long term climate changes on Earth, based on human activity.   During the warm Middle Cretaceous Period, about how much higher was sea level versus today? - 100­200 meters.   The release of ______ by volcanoes could lead to cooling, whereas the release of _____ by  volcanoes could lead to warming.
  
­ash, carbon dioxide The 100,000 year cycle of the extent of Earth's elliptical orbit around the Sun is called the  - Eccentricity cycle.   Earth has been relatively warm for about how many years? ­    15,000 years  
background image Assume you are a climatologist analyzing tree rings to determine past climates. If you see a 
period of time where the length between tree rings are larger than at other times, what does that 
tell you? - During periods of greater moisture and warmer conditions, tree rings will generally be  wider. Which of the following climate proxies provide the longest time frame of data? ­   Antarctic ice cores.   The natural vegetation of tropical climatic environments is generally ­ Tropical rainforest.   The Climate Classification system combines measurements of average temperature, 
precipitation, and seasonal variation to define climate types. 
­    True   The two weather variables used most often as indicators of climate are ­ Temperature and cloud cover.  
During periods of glaciation, ocean waters became more enriched with which isotope?
­   Oxygen­18   Temperatures increased by about how many degrees from the Pleistocene Epoch to the Holocene
Epoch?
- 6 degrees centigrade   A climate type not found at sea level in the Southern Hemisphere is ­    D.   What is the difference between present and ice­age snowlines along western North America? - About 900­1000 meters along the southern part of the transect.  
Paleoclimatic evidence includes desert sand dunes now covered by vegetation and channel 
systems of now­dry streams - True  
Which of the following is an important greenhouse gas?
- Carbon dioxide Assume you are a climatologist studying seafloor sediment. You have a 200,000 year old cross 
sediment in which you are going to analyze the ratio of oxygen­18 to oxygen­16. During your 
analysis, you determine that there is a greater quantity of oxygen­18 than oxygen­16 (beyond 
today's present values). What does this tell you? 

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School: Colorado State University
Department: Natural Resources
Course: Global Environmental Systems (GT-SC2)
Professor: Ursula Buford
Term: Spring 2016
Tags:
Name: GES study guide exam 3
Description: This study will review sections from week 5- 11 such as severe weather, air circulation, the ocean, cloud formation, climate change.
Uploaded: 04/07/2017
5 Pages 135 Views 108 Unlocks
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