GEO 605 Lecture 3: The Physical Geography of The Canadian Arctic
13 Feb 2017
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Document Summary
Arctic climate - land of the midnight sun. The sun shines at midnight during summer above the arctic circle. Mid-april - aug sun does not set . Even so, takes lots of radiation to warm it back up. At 74 n (resolute bay), sun sets in nov and doesn"t rise until mid-jan. A lot less solar radiation (even w/ 24hrs of sunlight in the summer). When northern hemisphere tilted away from the sun, the angle at which sunlight hits it is spread, stretching the same amount of solar energy over a larger area as toy go north. 2 months of the year (july and august) have avg daily t"s above freezing. Very little precipitation bc no evaporation due to frozen lakes. Very windy - cold sea ice and warm land. Warm air rises, cold air rushes in to fill that, creating a pressure difference = wind. Varies w/ wavelength/frequency producing different properties of energy, creating the em spectrum.
