UCSF 137 Lecture Notes - Lecture 16: Ice Core, Little Ice Age, Energy Intensity
11 May 2016
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Climate - long-term, regional or global change in atmospheric condition. Weather - short-term, local changes in atmospheric conditions (temp, precipitation, humidity) Recognize the factors that influences glacial and interglacial periods: records reveal 100,000 year cycles between glacial periods, astronomer (milankovitch) predicted these glacial period cycles based on. Albedo increases with snow covers decreases with snow melt. Cooler temps cooler ocean currents that carry more nutrients to warm surface water enhancing net primary. Wamer current depress npp and increase co2 in. Understand how scientists track climate change: ice core samples from artic/antartica. A. 2. frozen gas bubbles to determine atmospheric composition. Temp based on isotopic analysis of hydrogen atoms in water: temp anomaly. Difference of one year"s average temp from the avg of several years: forcings. Be familiar with natural influences on climate change: milankovitch cycles wobble . Gradual increases within 100,000 years are increasing at rapid rate.
