CU-Boulder ATOC 1070 - Lab7 (2 pages)

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Lab7



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Lab7

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Pages:
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School:
University of Colorado at Boulder
Course:
Atoc 1070 - Weather and the Atmosphere Laboratory
Weather and the Atmosphere Laboratory Documents

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Sarah Rose Section 8 Lab 7 The Earth s Energy Budget and Radiation Group Jeannie Mike Lights On Hand No Hand Pyranometer response Decrease Increase Longwave Radiations Shortwave Radiation Lights Of Pyrgeometer response Increase Increase Pyranometer response No Response No Response Pyrgeometer response Increased No Response Day 1 Feb 23 2013 Noon 19 00 UTC Midnight 700 UTC 260 W m 2 190 W m 2 Day 2 Feb 24 2013 Noon 19 00 Midnight 700 UTC UTC 300 W m 2 310 W m 2 950 W m 2 75 W m 2 0 W m 2 Day 1 Feb 23 2013 0 W m 2 Day 2 Feb 24 2013 Cloud Height m Max 8000 Min 0 Max 750 Min 0 Time mtn 01 00 23 53 23 45 10 00 Question 1 The pyrgeometer responded to the hand because the hand emitted long wave radiation Because temperature and wave length are inversely related the warmer the hand the shorter the wavelength The pyrgeometer measures wavelengths from about 4um to 40um Question 2 The pyranometer responded to the light because the pyranometer only responds to short wave length radiation and that s the spectrum light is in Light can emit both long and short wave radiation because the pygeometer responded to it because the light warmed with instrument Question 3 During the hours of the day the sun was in the sky and it is light out there is visible or shortwave radiation During the evening and into the night when the sun is setting as this light decrease so does the radiation During the night it is completely absent It is highest in late afternoon when the sun is most intense and directly perpendicular to the Earth s surface and there is the least flux A typical 24 hour period looks like this in the early morning to late afternoon the radiation steadily increases then from later afternoon to evening the radiation steadily decreases until it is absent Question 4 The relationship between long wave radiation and time of day is unclear On the 23 rd it was warmer at noon 260 W m 2 and then dropped to 190 W m 2 at midnight On the 24th it was 300 W m 2 at noon and then increased to 310



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