N

NAO. See North Atlantic Oscillation NASA. See National Aeronautics and

Space Administration National Aeronautics and Space Administration (NASA) climate change modeling 143-145 climate research 143-151 current temperature records 149-151 methane in ice cores 89 minerals as proxy data 146-147 ocean-atmosphere model 145 sediment layers in tidal marshes 147-148

testing of climate modeling 155-156 use of paleoclimatic data for computer modeling 2-3 National Assessment of the Potential Consequences of Climate Variability and Change 172c National Ice Core Laboratory (Denver,

Colorado) 85 National Oceanic and Atmospheric Administration (NOAA) abrupt climate change evidence 10, 13 data for climate modeling from 6 temperature records compiled by 40 on threats to coral reefs 111 use of information from caves 94 use of paleoclimatic data by 7-8 Neogloboquadrina pachyderma 99-100 New York City 37 Niger 128 Niger River 38 Nile civilization 125 nitrogen 50

NOAA. See National Oceanic and

Atmospheric Administration Nobel Peace Prize 174c nonradiogenic dating methods 53-54 North America 122-124, 123, 137,

157-161, 158 North Atlantic Ocean 145 North Atlantic Oscillation (NAO) 3, 15, 156-157

North Atlantic Thermohaline

Circulation 38 Northern Hemisphere 37, 69, 150

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