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23 Cards in this Set
- Front
- Back
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weather and climate
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weather local and temporary, climate is over time and latitude and elevation play larger roles
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global air circulation
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affected by the uneven heating of the earths surface, solar energy, seasonal changes in temp/ air/ etc
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coriolis affect
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global air circulation is affected by the rotation of earth on its axis
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comnvection currents
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global air circulation is affected by the properties of air, water and land
the cells: heat and moisture are distributed over the earths surface by vertical currents, 6 giant convection cells, determine the climate |
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ocean current
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distributes heat and nutrients:
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global warming
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large inputs of greenhouse gases from anthropogenic activities will affect world in OUR lifetime
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studying a volcano. climate change
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cooled the avg earth temp and then returned to normal- climate model projections should be taken seriously
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how did they know the temp in the past/
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they can study small air bubbles in the ice: greenhouse gas concentrations, solar/snowfall activity
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wind
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carries dust over the ocean, iron...gfertilize the phytoplankton
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the natural greenhouse effect
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the sun, greenhouse effect warms earth because of greenhouse gases,oceans store co2 and heat and evaporate and bounce back or go through troposhpere move the heat to other parts of the world too, natural cooling through water vapor in the troposhere (heat rises)
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major greenhouse gases
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water vapor, co2, methan, nitrous oxide
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what increases the main greenhouse gases?
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fossil fuel burning, deforestation, agriculture
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effects of the greenhouse effect/rise in greenhouse gases
CGCMs |
ice melting, climates changing
CGCMs:couple, or combine, the effects of the atmosphere and oceans on climate: determine avg temp nd greenhouse gas content of the troposphere VERY HIGH CAN increase plant photosynthesis but it would slow as plants reach maturity will change the ocean currents put cities underwater |
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effects on biodiversity
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are there winners and losers?...will they be able to adjust?
warmer world: spread of diseases like malaria, heat destruction of food supply, droughts food unsettle times leads to environmental refugees.. |
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why so hard to deal with global warming
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GLOBAL issues to get countries to agree to deal, problem is a long term political issue, the effects will last a long time, action to reduce the threat are controversial because they afect lifestyles and the economy
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mitigation and adapatation: 2 ways to deal with global warming
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mitigation: reduces greenhouse gas emmisions
adaptation:where we recognize that some warming is inevtiable and devise strategies to elimit harmful effects |
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storing co2 in the ground
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we dont know how much we can hold this way,not sure if oky to hold in the ocean because can leak like radioactive cannisters
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2 ways that the ocean stores co2
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solubility pump:co2 becomes dissolved in seawater
biological pump:organisms take it up oceans help alot by storing co2 |
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oceans and storing co2
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they take alot up and help us, but they can become acidic..the more co2 that goes in, the more acidic it is (acid/base balance of the ocean)...acidification could be GLOBAL DISASTER
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acidification
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bad for coral reefs: bleaching and eutrphication (nutrients) affect them....now acidification too!! they cant survive in acidic ocean
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bering sea issues
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loss of fisheries...produces like 30 percent of worlds food...STOP BURNING FOSSIL FUELS, DO RESEARCH , BE ENERGY EFFICIENT, TAX GREENHOUSE GAS EMMISIONS
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kyoto:
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us and china have not joined, its an effort by the world to reduce emmisions of co2, nitrogen, and CH into the atmosphere
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CFC
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chlorofluorocarbons: have loered the average concentrations of ozone, no longer manufacture, but still see effects
used to be used in fridge, airconditioning: THEY DESTROY THE OZONE LAYER WITHOUT DESTROYING OR GETTING USED UP THEMSELVES.. when ozone thins, more uv radiation gets to the earths surface harms human health, crops, forestss |
