National Aeronautics and Space Administration absorbed by atmosphere 77.1 www.nasa.gov incoming solar radiation 340.4 ea
Posted: Tue Jul 12, 2022 1:35 pm
- National Aeronautics And Space Administration Absorbed By Atmosphere 77 1 Www Nasa Gov Incoming Solar Radiation 340 4 Ea 1 (80.1 KiB) Viewed 38 times
2. We used a ‘ballpark’ global albedo of 0.3 in Part 1. What isthe albedo to 2 decimal places from this graph? Hint: you needto consider reflection from surface, clouds, &atmosphere.
3. What percent of this calculated albedo is due to clouds &atmosphere alone?
4. If 398.2 W/m2 is the average surface emission ofinfrared radiation, then what is the average surface temperature inKelvins if we assume blackbody emission?
5. What percent of surface emission is absorbed by theatmosphere?
6. Do your answers to (1) and (5) help explain a majorcharacteristic of the greenhouse effect? Explain.
7. What percent of surface emission transmits unimpeded (i.e.,the atmospheric window) to space?
8. Which components go into the calculation of ‘back radiation’of infrared radiation? Hint: you should be able to add severalcomponents and subtract others to figure out where this 340.3W/m2 number comes from.
National Aeronautics and Space Administration absorbed by atmosphere 77.1 www.nasa.gov incoming solar radiation 340.4 earth's energy budget reflected by clouds & atmosphere 77.0 net absorbed 0.6 total reflected solar radiation 99.9 absorbed by surface 163.3 reflected by total outgoing surface infrared radiation 22.9 239.9 emitted by atmosphere 169.9 absorbed by atmosphere 358.2 emitted by surface 398.2 atmospheric window 40.1 -emitted by clouds 29.9 greenhouse gases back radiation 340.3 The Earth's energy budget describes the various kinds and amounts of energy that enter and leave the Earth system. It includes both radiative components (light and heat), that can be measured by CERES, and other components like conduction, convection, and evaporation which also transport heat from Earth's surface. On average, and over the long term, there is a balance at the top of the atmosphere. The amount of energy coming in (from the sun) is the same as the amount going out (from reflection of sunlight and from emission of infrared radiation). All values are fluxes in Wm² and are average values based on ten years of data thermals (conduction/ convection) NASA 18.4 latent heat (change of state) 86.4 evapotranspiration Loeb et al, J. Clm 2009 Trenberth et af. BAMS, 2009 NP-2010-05-265-LaRC