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Jorge Vazquez Universidad Del Norte Barranquilla, Columbia 11/16/2012 Jorge.Vazquez@jpl.nasa.gov Jet Propulsion Laboratory/Caltech How the Oceans Ended the Climate Debate Global Warming Guaranteed
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What causes global warming?
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What really causes global warming?
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Rise of CO 2
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Side of Quelccaya ice cap, Peru Annual layers Lonnie Thompson How do we know?
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What happens to the heat?
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Where does the heat go?
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Heat Capacity Heat capacity is the amount of heat required to change an object’s temperature The oceans have 1000 x the heat capacity of the atmosphere
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Energy Balance Atmosphere Earth Warms A New Balance A Warmer World
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Earth Warms Energy Balance: The Ocean Planet This takes 1000 years!!!
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So is global warming real?
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To overturn the world economy based on the musings of a few idiot leftist scientists is just stupid, that’s what Global Warming is all about. -Rush Limbaugh-
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Sea Level Rise
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Floats Satellite Observations of SSH
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Heating or Melting? addition of heat 25% (2”) Thermal Expansion addition of freshwater + 75% (6”) Add Mass Ice Melt = Total sea level rise 100% (8”)
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Potential Contributions Thermal Expansion: ~1 meter (3 feet) Sea Ice Melt Does NOT raise sea level Melting Land ice does! So does iceberg calving
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Historic Sea Level Rise Plots by Robert A. Rohde for Global Warming Art: http://www.globalwarmingart.com/ ~ 0.25 mm/yr ~ 2.0 mm/yr Recent rates of sea level rise are 100 times larger than historic rates. 9000 years 120 years
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Tide Gauge Observations [Church and White, 2006] ~ 8 inches (20 cm)
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Tide Gauge Observations Average Rate ~ 1.8 mm/year [Church and White, 2006] ~ 8 inches (20 cm)
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Tide Gauge Observations 0.8 mm/year 2.0 mm/year 3.2 mm/year [Church and White, 2006] ~ 8 inches (20 cm)
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Satellite Observations
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Sea Level Rise from Altimetry
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The Ocean Conveyor Belt
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What’s up with the ice sheet?
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Evacuate the Country!!!
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Rapid Cooling Was the Conveyor Belt to Blame? Maybe, back then
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The Great Ocean Conveyor Belt
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The Great Conveyor Belt
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Could this Really Happen?
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0.29 0.19 0.03 1.65 0.54 0.15 Hu et al., GRL, 2009 Shutdown Today unlikely
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Knight et al., GRL, 2005 Still, AMOC could be important for regional climate HadCM3 1400-year unforced, coupled model run
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∆Precip ∆SST Coupled Model: Shutting Down the AMOC Vellinga & Wood, Climatic Change, 2002 Cooling: Hurricane Connection? African Drought Brazilian Rainfall SW Australian Drought US Rainfall
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The Overturning at 41°N Mean:15.5 Sv RMS: 2.4 Sv Trend: ~ 2.4 Sv increase
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Probably safe for today….
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The Future Aquarius and Salinity from Space
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Measured as grams of salt per 1000 grams of water. In the ocean varies between 32 to 38 parts/thousand.
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Schematic of Hydrological Cycle
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Aquarius URLs and information Aquarius URLs and information –http://aquarius.jpl.nasa.gov/AQUARIUS/ http://aquarius.jpl.nasa.gov/AQUARIUS/ –http://aquarius.nasa.gov/ http://aquarius.nasa.gov/ –http://oceancolor.gsfc.nasa.gov/AQUARIUS/ –http://podaac- www.jpl.nasa.gov/SeaSurfaceSalinity http://podaac- www.jpl.nasa.gov/SeaSurfaceSalinityhttp://podaac- www.jpl.nasa.gov/SeaSurfaceSalinity 51
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Animation Courtesy of Remote Sensing Systems, Santa Rosa California
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