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33 Cards in this Set
- Front
- Back
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What heat energy warms the lower atmosphere?
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Infared
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What does more dust in an ice core imply?
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Cooler climate
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What has a greater albedo, the oceans or the ice sheets?
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Ice sheets
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What reflects radiation in the upper atmosphere?
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Ozone
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What absorbs solar radiation?
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Earth's surface
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Where was the global climate change convention held?
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Kyoto, Japan
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Levels of what are analyzed in ice cores?
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CO2 and O2
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2 visible signs of global warming?
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Melting ice caps and rising sea levels
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Hottest decade on record?
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1990's
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Define albedo
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Reflectivity of Earth's surface materials
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Nitrous Oxide residence time and % risen since 1800's?
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100 years, 15%
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Methane's residence time and absorption potency?
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10 years, 20 times as good at holding heat as carbon dioxide
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Climate proxies?Examples?
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Indirect record of past temperatures. ex. fossil pollen, ice cores, tree rings
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Top three greenhouse gases by concentration?
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Water vapor, carbon dioxide, methane
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Two factors that determine climate?
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Temperature and precipitation
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What would oceans release if the evaporation rates increased?
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Carbon dioxide
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Anthropogenic? Examples?
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Human caused climate forcing.
Ex. increased production of GHGs, nuclear blast |
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American scientist who first discovered that storms move east to west in the U.S.
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Benjamin Franklin
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Climate change affect on biosphere?
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Mass extinctions
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This current warming trend is ___________.
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Unprecedented
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How much has global temperature increased over the last century?
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0.6 degrees Celsius
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Organisms that help us learn about past climate changes?
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Foraminifera, shells spiral in different directions in warm climates than in cold climates
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What causes the CO2 oscillations in the Northern Hemisphere?
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Changes in photosynthesis levels as the seasons change.
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What is the "Nuclear Winter" scenario?
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Large quantities of particles ejected into atmosphere, spread across globe. Reflect the suns light, killing many plants, animals, and humans.
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2 isotopes we study in ice cores?
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Oxygen and hydrogen
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2 effects of global warming on biosphere?
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Coastal areas underwater, longer growing season
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Areas that are added to by snowfall every year and never completely unfreeze
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Glaciers
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How long has Earth's climate remained the same?
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10,000 years
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Top four greenhouse gases in order of absorption potency?
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Nitrous Oxide, Methane, Water Vapor, Carbon Dioxide
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Water vapor vs. CO2 absorption?
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Water vapor holds heats 4 times as well as CO2
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Define climate change?
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Departure from expected average weather and climate norms
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Natural climate changes?
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Volcanoes, changes in suns output,meteorite strike, plate tectonics, changes in Earth's motion
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How much warmer does the greenhouse effect make Earth?
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33 C, 91.4 F, 14 C, 58 F
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