ES 2WW3 - Lecture 2 - Water Cycle and Global Warming - A2L edited

ES 2WW3 - Lecture 2 - Water Cycle and Global Warming - A2L edited

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Earth Sc 2WW3 The Water Cycle and Global Warming
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Climate change: the last 2 Myr 18,000 years ago 9500 years ago
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Climate and Solar Radiation • The amount of solar radiation received by Earth:
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Continental Drift and Climate Change
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Vast Shifts in Climate Conditions • Causes of vast changes in distribution of:
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Major Stores in the Water Cycle • Freshwater:
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Mt Kilimanjaro Beardmore Glacier
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Exchanges within the Water Cycle • Evaporation:
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Surplus of Heat near the Tropics
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The Global Radiation Budget • Heat gain: • Heat loss:
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How does the Greenhouse Effect contribute to the Global Energy Budget? • Warming is occurring due to presence of:
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Latent Heat Transport by Convective Storms
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The Global Atmospheric Circulation • Latent Heat:
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The Global Water Cycle • Beginning of the water cycle:
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Precipitation: Driving Force of Water Resources (1) • On average:
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Precipitation: Driving Force of Water Resources (2) • January:
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Precipitation: Driving Force of Water Resources (3) • July:
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Seasonality of Precipitation • Extent of variation from one season to the next:
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Year-to-year Variability of Annual Precipitation • More difficult to manage than seasonal cycle
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Most Problematic Regions are the Most Variable • When 2 or 3 of these factors intersect:
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Inter-Annual Variation in Evapotranspiration • Greatest variation in total volume:
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Average Net Annual Water Balance
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Unformatted text preview: Determined by the balance between precipitation and evapotranspiration Average Annual Runoff Surface runoff: Lifeblood of freshwater aquatic systems Seasonal Variation in Runoff e.g. January: Seasonality of Surface Runoff Can be a major problem for management of water resources: River Discharges into the Ocean Dominant rivers of the world: Global Warming: Trend Likely to Continue Over the next century: Key Results for the Evidence of Climate Change According to UK Met Office: Global average temperatures increased by: Rainfall: Ocean temperature: Sea ice in the Arctic: Volcanic Activity and Climate Change Water Vapour The most important greenhouse gas: Predicted Changes in Water Resources and Riverflows e.g.: England, by 2065 Predicted Changes in Global Riverflows e.g.: model of changes by the 2050s relative to 1960-1990 average Predicted Riverflow for South Asia Mekong River: Extra Energy in a Warmer World What is Groundwater? Groundwater in Canada About 8 million people depend on groundwater Recharge of Aquifers Saltwater Intrusion in Coastal Aquifers Significant reductions in fresh groundwater resources expected to occur near coastlines Declining Water Levels in the Great Lakes...
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This note was uploaded on 04/08/2012 for the course EARTH SCIE booger taught by Professor Bum during the Fall '11 term at McMaster University.

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ES 2WW3 - Lecture 2 - Water Cycle and Global Warming - A2L edited

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