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March 21_NH - Chapter 12 Climate and Climate Change...

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March 21, 2012 Chapter 12: Climate and Climate Change Learning objectives o Know the difference btw weather and climate and how their variability is related to NH o Know how climate has changed in the last 1-2 million years through glacial and interglacial conditions and how human activity is altering climate o Know ways that may mitigate climate change and its assoc. hazards Weather vs. Climate o Weather is day to day. It constantly changes. o Climate is long-term averages. Climate change is rare. How can changes in weather and climate lead to natural hazards? o El Nino: disrupts normal weather patterns, making it difficult for economies to adapt El Nino years have a reverse of ocean and wind currents making typically dry places to become wet, and wet places to become dry o Sea level increases can threaten coastal communities o Warmer climates may produce more hurricanes o Some areas may experience more rain – others may experience drought Can climate change? Globally or regionally
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