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Unformatted text preview: b. Millennial Oscillations during glacial period vs. interglacial i. Very wide spacing and amplitude ii. Average spacing: 1500 yrs iii. Called Dansgaard-Oeschger cycles 4. Oxygen isotope ratios in Ice and Ocean Cores a. Ocean Cores i. D18O signals 2 influences: Temp. Change and Ice volume b. Ice cores i. D18O signals reflect several influences: ii. Temperature of snowfall iii. Source of moisture iv. Transport paths v. Season of precipitation c. Relationship i. Correlation, as marine D18O becomes more positive, D18O in ice cores become more negative...
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- Spring '08