ES Chapter 18 Global climate change

ES Chapter 18 Global climate change - Chapter 18: Global...

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Chapter 18: Global Climate Change
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Climate area's long-term atmospheric conditions temperature humidity wind precipitation barometric pressure solar radiation global climate change sees all these factors but considering the whole planet
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Global Warming increase in Earth's average surface temperature only
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Rate of Atmospheric Changes climate varies naturally overtime the rate has increased fossil fuel combustion and deforestation
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Factors that Influence Climate Milankovitch cycles affect intensity of solar radiation cause long-term temperature changes like glaciation axial wobble→ 19 to 23,000 year cycle variation in tilt→ 41,000 year cycle variation in orbit→ 100,000 year cycle
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Factors that Influence Climate ocean absorption CO 2 is soluble in ocean water but as temperature increases solubility decreases phytoplankton absorbs some in photosynthesis but not enough to compensate the extra CO 2 produced today positive feedback effect
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Factors that Influence Climate ocean currents El Niño air pressure decreases in western Pacific weakens the equatorial winds warm water flows east towards America shuts down delivery of nutrients fish population plumbs ocean birds, reptiles and mammals are also affected causes billions of economical losses www.noaa.gov
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Factors that Influence Climate La Niña opposite of El Niño cold waters extend to the west El Niño/La Niña occur in cycles but these have become irregular Scientists are investigating if there is any relation between irregularity of phenomena and air/water temperature increases www.noaa.gov
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Thermohaline Circulation www.aw-bc.com/Withgott
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Thermohaline Circulation interruption might trigger rapid climate change (hypothesis) data suggest circulation is slowing down
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Study of Climate Change proxy indicators: indirect evidence ice cores tree rings sediment beds coral reef
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Study of Climate Change direct atmospheric sampling studies present-day climate measures conditions of the atmosphere concentrations of CO 2 monitoring of temperature
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Study of Climate Change Climate Models simulations mathematical sophisticated computer programs that combine atmospheric circulation ocean circulation atmosphere-ocean interactions feedback old data is used to see if the model works before it is applied
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Current Climate Change Impacts international panel of scientists (IPCC) Fourth Assessment Report of 2007 (fig. 18.12)
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This note was uploaded on 01/06/2012 for the course ECO 1305.8501 taught by Professor Dianagomez during the Fall '11 term at Collins.

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ES Chapter 18 Global climate change - Chapter 18: Global...

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