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The Effects Of Climate Change S. Elwynn Taylor Agronomist, Extension Climatologist Iowa State University, Ames, Iowa setaylor@iastate.edu
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How much wetter than usual was June ? In 1988: How many Window Air Units can we sell?
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2014: Are the Hurricanes going to all be in the Pacific Now? Simon
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http://www.climate.gov/news-features/event-tracker/wobbly-polar-vortex-triggers-extreme-cold-air-outbreak http://www.climate.gov/news-features/event-tracker/polar-vortex-brings-cold-here-and-there-not-everywhere
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The Management Question: Is this the “NEW Normal” or is this the “Same Old Same Old” ?
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Climate, Past & Future “The climate is changing, climate has always changed & will always change. The question is; ‘how much, how fast, how come?’ ” D. M. Gates ‘66
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Will the “New” Dwarf the “Old.” The Old is still with us. The “New” is, however, very real: & the “Problem” is US (with apologies to Pogo)
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Do People Change the Earth’s Climate ? Remember: There is a lot more to climate than simply Temperature and Rain.
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b
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http://www.greenpeace.org.uk/files/images/forests/amazon/amazon-fires-aug08.jpg
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On the Same Old - - - -
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123.4 2004 - 9 158.8 (+16 to 19 cents) 174 9%
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La Nina : Extremes
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http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/season.JFM.nao.gif
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Final, Revised for: Bulletin of the American Meteorological Society, Vol. 77, No. 2, Feb. 1996, pp 279-292. http://www.ncdc.noaa.gov/oa/climate/gcps/papers/icc-us.pdf
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The NEW Corn belt Remember when it was the price of “Crude” that impacted energy cost?
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Increased Stream Flow: Increased # of Flood-prone Years 1 2 3 4 5 6 7 8 9 10
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19 yr Dry/Wet Tree rings indicate climate cycles. wet dry
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Heat & Water Stress & 90 year cycles
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Tree Rings Roanoke, NC cypress tree. Dennis Blanton, Wm & Mary College, David Stahle, Univ. of Arkansas. U.S. drought starts here.
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800 Year Rain (Virginia)
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Do People Change the Earth’s Climate ? Remember: There is a lot more to climate than simply Temperature and Rain.
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b
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Secondary CO2 impacts on climate are a major area of research. It appears that the effect on day-night temperature range may be of high significance
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Tillage of the Soil vs Clearing of the Forest Can Agriculture change from cause to cure? Can a farm be a “good” as a Prairie?
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Reasons Corn Production is Up 1: Growing corn is profitable 2:
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http://www.dtnprogressivefarmer.com/dtnag/ servlet/GetNewsImage?path=0702BAD4.gif&w idth=
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Profit in Ag Know what is going on Manage the Risk
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Corn Price vs Cost
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High risk Moderate High
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