Envs 2270 Exam Review Questions & Answers 2023/2024

3 orbital cycles {Ans: tilt of earth's axis = obliquity shape of earth's orbit = eccentricity way the earth "wobbles" = precession}what are climate proxies? {Ans: natural archives of climate: - tree rings - ice cores - pollen in lake sediments}atomic mass {Ans: the number of protons + the number of neutrons}ozone {Ans: - O3 - in the upper atmosphere (stratosphere) - protects us from harmful radiation - ozone at ground level (lower atmosphere) is a harmful pollutant and a GHG - no direct sources}Milankovitch cycles {Ans: Changes in the shape earth's orbit and tilt that cause glacial periods and interglacial periods.}what is the deadly trio scientists are worried about? {Ans: threats, two of which are related to climate change, may cause a mass extinction of oceans. - ocean warming - ocean acidification - anoxia (not bc of climate change)}types of ocean currents {Ans: surface currents and deep currents}b2 scenario {Ans: environmental + regional - slow economic growth - low population increase - focus on environmental sustainability - regional solutions to environmental issues}atmosphere {Ans: the envelope of gases that surround the earth. extends from surface of the earth to appx 145