GEOL 106 Lecture Notes - Lecture 12: Intertropical Convergence Zone, 30Th Parallel North, Paleothermometer

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Climate change: weather: short term changes that we observe in temperature, clouds, precipitation, humidity and wins in a region or city. Vary day to day: climate: weather averaged over many years. Changes very slowly, from 10s to 100s of years. A minimum description of climate is the monthly values of temperature and precipitation averaged over a few decades. These quantities largely control the natural vegetation. Oceans store heat effectively but land does not. Water has a high heat capacity and liquid water is constantly being stirred (heat 10s to 100s of m) La(cid:374)d o(cid:374)ly heats a few ce(cid:374)ti(cid:373)eters a(cid:374)d it does(cid:374)"t take (cid:373)uch to heat or cool land. Temp change between cold and warm seasons. Tilt of the earth"s axis (23. 5 degrees) Temperature variations dominate in mid and high latitudes. Down to ~30 degrees north during winter months. Stronger temperature contrast in the winter results in stronger front. Winter is the rainy reason in the mid-latitudes.

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