AOS 100 ? Homework 3 Due: Tuesday, March 10, 2009 Please provide your name and student ID at the top of your assignment. The following questions should be answered in a few sentences. Your answers should be concise, neatly written or typed, and grammatically correct. 1. a) Draw a diagram of the Earth tilted on its current axis. Label the latitudes of Arctic and Antarctic Circles and the Tropics of Cancer and Capricorn. Now, imagine that the axis of the Earth was tilted an additional 23½°. Draw another diagram of the Earth and its new tilt, again label the latitudes of the Arctic and Antarctic Circles and the Tropics of Cancer and Capricorn. (5 points) b) On the Earth with this new tilt, describe what the day of the summer solstice would be like in Madison, WI (i.e. where would the sun be in the sky at noontime, how many hours of daylight...). Compare this description with the current Madison summer solstice day. (5 points) c) From the Earth with the current tilt to the Earth with the new tilt, how would the seasons change for Madison? Defend your answer using concepts from parts (a) and (b). (5 points) 2. On two consecutive nights, Madison had overcast skies. The weather conditions were the same on both nights, however the first night had a low temperature of 3°F and the second night had a low temperature of 10°F. Using this information, evaluate which night had overcast high clouds and which night had overcast low clouds. (Hint: the temperature of a cloud is similar to the temperature of the tropospheric air at the same altitude, thus high and low clouds have different temperatures.) (10 points) 3. The ash and particulates that are released into the atmosphere during a major volcanic eruption have a lifetime in the atmosphere of roughly one year. In that year the albedo (fraction of solar radiation reflected back to space) of the planet is increased. What might happen to the planet's average temperature the year following a major volcanic eruption. Explain your reasoning. (10 points) Andrea Lopez
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