9-ATM moist_Fa09

9-ATM moist_Fa09 - REVIEW: Deep Ocean Circulation-giant...

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Unformatted text preview: REVIEW: Deep Ocean Circulation-giant conveyor belt Simplified image of deep ocean circulation Gravity-driven circulation Ice forms at high lats, leaves heavy salty water that sinks What drives deep ocean circulation? What is unusual about this painting? Painted by Emanuel Leutze Little Ice Age Record of climate changes from ice cores GLACIAL PERIOD Warming Dryas octopetala Little Ice Age ~1300 AD~1850 AD Another partial shutdown? Models predict 5-9 F cooling in N. Atlantic region if conveyor shuts down Today: OCEAN AND FRESH WATER DISTRIBUTION How much of the earths water by percentage is fresh (non-saline) surface water? How much of the fresh surface water is frozen? Is there more fresh surface water or groundwater? CONCEPTS: Hydrologic Cycle = transfer of water from earth to ATM and back to earth again Moisture in the Atmosphere 2 Types Measurements: 1. Absolute Humidity mass of water vapor in a given volume of air; eg. 20 gr H 2 O / 1 m 3 air 2. Relative Humidity (RH) RATIO (%) actual water content of air potential amt. water air could hold Example: 1 gallon = 50% RH 2 gallons What controls how much water a parcel of air can hold?parcel of air can hold?...
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This note was uploaded on 04/09/2010 for the course GEOG 1104 at Virginia Tech.

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9-ATM moist_Fa09 - REVIEW: Deep Ocean Circulation-giant...

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