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Oceanography: Lecture 9 - Sunlight, color, temperature

by: Megan Dengler

Oceanography: Lecture 9 - Sunlight, color, temperature GEOG212

Marketplace > University of Arizona > Geoscience > GEOG212 > Oceanography Lecture 9 Sunlight color temperature
Megan Dengler
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Class notes from September 20, 2016 in Intro to Oceanography. Sunlight, color, and temperature and their relevance to the ocean and earth's systems are discussed
Intro to Oceanography
Joellen Russell
Class Notes
sunlight, color, temperature




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This 2 page Class Notes was uploaded by Megan Dengler on Tuesday September 27, 2016. The Class Notes belongs to GEOG212 at University of Arizona taught by Joellen Russell in Fall 2016. Since its upload, it has received 17 views. For similar materials see Intro to Oceanography in Geoscience at University of Arizona.

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Date Created: 09/27/16
September 20, 2016 Lecture 9 – Sunlight, Color, and Temperature - 4 Processes driven by Sunlight o 1. Warms Ocean o 2. Reflects out o 3. Photosynthesis o 4. Evaporation 1. Warms Ocean - Direct vs. Indirect Heating o Direct energy reaches the ground in a concentrated form  Energy concentrated  Direct sunlight o Indirect energy is spread out when it reaches the ground  Energy spread out  Indirect sunlight o Equator is warmer than the poles because of the angle at which the sun hits it 2. Reflects Out - Why Is Seawater Blue? o Blue light is reflected, other colors are absorbed o Ocean water does not want to absorb blue light - Only 1% of the light is left by the time you are 100 meters down o Mostly blue  Blue fish will look blue  Red fish will appear gray  No red photons 3. Photosynthesis - Less plants in the open ocean than along the edges o Plants need nutrients, fertilizer, upwelling 4. Evaporation - Hydrologic cycle - Convinces water to be in the vapor phase instead of the liquid phase (liquid to gas) o More molecules cross the medium energy threshold and escape into gas - How much heat do you need? o Ice melting: 80 calories/gram o Warming (0-100): 100 calories/gram  1 calorie will head 1 gram of water 1 degree o Evaporating: 540 calories/gram - Energy is stored in the water where evaporation occurs (tropics) - Energy is released where vapor turns back into liquid (clouds/rain) - Moving water also moves heat around o Warming 1C: 1 calorie/gram o Evaporation: Absorbs 540 calories/gram o Condensation: Releases 540 calories/gram


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