LECT3 (Energy) - AOM 4932 Earth's Energy Balance The...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
AOM 4932 - Earth's Energy Balance The hydrologic cycle is fueled by energy from the sun. Planetary geometry creates areas of energy surpluses and deficits which drive all active meteorological processes. These processes originate to redistribute energy throughout the system. Earth and the atmosphere are the media through which the energy transport occurs oceans and atmosphere are more active in this redistribution than land mass. Water transport and phase changes [i.e. liquid (oceans) vapor (humidity) liquid (precipitation)] play a major role energy transport Energy - flow for the earth as a whole Radiation measured with a pyranometer or radiometer. Important aspects of the earth's energy balance : 1. Short-wave energy from the sun moves through the atmosphere to the earth more easily than longwave energy can move from earth through the atmosphere. This keeps the planet warm (similar to greenhouse glass). 2. Planetary geometry creates areas of energy surpluses and deficits. Incoming solar radiation is uneven because the earth is a sphere which rotates on a tilted axis. Outgoing radiation is more uniform because the temperature of earth’s atmosphere does 1 short-wave solar radiation entering atmosphere - 99.998% reflected from particulates in air, clouds and the earth’s surface - 30 % longwave radiation emanated - 70 % longwave radiation from clouds, vapor, etc. back radiation from earth - 20% earth heat entering atmosphere - 0.002 % (geothermal) absorbed by earth - 51% absorbed by atmosphere (water vapor, dust, clouds) - 19 % latent heat and sensible heat flux - 30 % unit area time N m (energy) energy Radiation rate measured in Joules m 2 sec or calories cm 2 sec Note:1 cal cm 2 = 1 langley (ly)
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
not vary all that much from the equator to the poles (~ 30 ° C). Energy gradients drive global energy transport processes such as wind and ocean currents.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern