From Global Warming Art
This figure shows the solar radiation spectrum for direct light at both the top of the Earth's atmosphere and at sea level. The sun produces light with a distribution similar to what would be expected from a 5525 K (5250 °C) blackbody, which is approximately the sun's surface temperature. As light passes through the atmosphere, some is absorbed by greenhouse gases with specific absorption bands. Additional light is redistributed by Raleigh scattering, which is responsible for the atmosphere's blue color.
Since most of the absorption bands are located away from the peak in solar radiation, a majority (~70%) of the radiation from the sun reaches the Earth's surface. This is in contrast to the infrared radiation emitted by the Earth, whereby a majority is absorbed by bands occuring near the peak at ~5000 nm. This discrepancy, where solar light can easily reach the Earth's surface but returning energy is absorbed, is a defining quality of Earth's greenhouse effect.
These curves are based on the American Society for Testing and Materials (ASTM) Terrestrial Reference Spectra, which are standards adopted by the photovoltaics industry to ensure consistent test conditions and are similar to the light that could be expected in North America. Regions for ultraviolet, visible and infrared light are indicated.
This figure was prepared by Robert A. Rohde.
Global Warming Art License
This image is an original work created for Global Warming Art by Robert A. Rohde.
Please select the category below that best matches your intended use.
Academic and Non-commercial Use
This image may be used freely in any academic work where the author(s) do not receive a fee for their efforts and/or in any non-commercial
work, provided that in either case these conditions are met:
- You acknowledge the author of this image and Global Warming Art alongside the image. The recommended format is "Image created by Robert A. Rohde / Global Warming Art", but this may be varied to conform with a publication's style.
Qualified academic and non-commercial projects may also be eligible to receive higher resolution and/or vector graphics forms of this image upon request.
Free Content Use (GFDL / CC-BY-SA)
This image (or modified versions of it) may be used in any work where the publication as a whole is released under one of the following free content
Where applicable, these rights include some forms of commercial use; however, the provisions on redistribution are such that these licenses not intended for most commercial projects.
Commercial publishers who wish to use this image under terms other than those given above, may obtain a license to do so by contacting firstname.lastname@example.org
If you do so, please provide the following information:
- Name of the image or images required
- Name, nature, and target audience of the publication it is intended to appear in
- Approximate size of the print run or distribution
- Region and/or language of distribution
- Any additional rights requested
Rights are usually provided based on a one-time fee which is at or below market rates. In most cases, higher resolution and/or vector graphics versions of the image are available at no additional cost.
It is also requested, but not required, that authors send Global Warming Art a copy of any significant publications that include the use of this image. Those interested in commercial and/or higher quality reproduction may also wish to refer to the information for professional republishers.
GWArt images and pages linking to this file
Wikipedia pages and images linking to this file
Click on a date/time to view the file as it appeared at that time.
|current||23:14, 9 June 2007||800×595 (36 KB)||Robert A. Rohde (Talk | contribs)|