Spectral intensity of sunlight (average at top of atmosphere) and thermal radiation emitted by Earth's surface.
There is no standard cut-off for the near-infrared range; therefore, the shortwave radiation range is also variously defined. It may be broadly defined to include all radiation with a wavelength of 0.1μm and 5.0μm or narrowly defined so as to include only radiation between 0.2μm and 3.0μm.
There is little radiation flux (in terms of W/m2) to the Earth's surface below 0.2μm or above 3.0μm, although photon flux remains significant as far as 6.0μm, compared to shorter wavelength fluxes. UV-C radiation spans from 0.1μm to .28μm, UV-B from 0.28μm to 0.315μm, UV-A from 0.315μm to 0.4μm, the visible spectrum from 0.4μm to 0.7μm, and NIR arguably from 0.7μm to 5.0μm, beyond which the infrared is thermal.[1]
^However, the definition of thermal infrared may start at wavelengths as short as 1.1μm (longer than which optical instruments have difficulty measuring) or anywhere between 2.0μm and 4.0μm, depending on the method of measurement and its purpose.
^L. Chen, G. Yan, T. Wang, H. Ren, J. Calbó, J. Zhao, R. McKenzie (2012), Estimation of surface shortwave radiation components under all sky conditions: Modeling and sensitivity analysis, Remote Sensing of Environment, 123: 457–469.
External linksedit
. A lesson plan that deals with shortwave radiation from the SIRS instrument.
Referencesedit
Zhang, Y., W. B. Rossow, A. A. Lacis, V. Oinas and M. I. Mischenko (2004). "Calculation of radiative fluxes from the surface to the top of atmosphere based on ISCCP and other global data sets: Refinements of the radiative transfer model and the input data." Journal of Geophysical Research-Atmospheres 109(D19105).
L. Chen, G. Yan, T. Wang, H. Ren, J. Calbó, J. Zhao, R. McKenzie (2012), Estimation of surface shortwave radiation components under all sky conditions: Modeling and sensitivity analysis, Remote Sensing of Environment, 123: 457–469.
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shortwave, radiation, optics, shortwave, radiation, redirects, here, radio, frequency, radiation, shortwave, band, other, uses, shortwave, disambiguation, shortwave, radiation, thermal, radiation, optical, spectrum, including, visible, near, ultraviolet, near,. Shortwave radiation redirects here For radio frequency radiation see Shortwave band For other uses see Shortwave disambiguation Shortwave radiation SW is thermal radiation in the optical spectrum including visible VIS near ultraviolet UV and near infrared NIR spectra Spectral intensity of sunlight average at top of atmosphere and thermal radiation emitted by Earth s surface There is no standard cut off for the near infrared range therefore the shortwave radiation range is also variously defined It may be broadly defined to include all radiation with a wavelength of 0 1mm and 5 0mm or narrowly defined so as to include only radiation between 0 2mm and 3 0mm There is little radiation flux in terms of W m2 to the Earth s surface below 0 2mm or above 3 0mm although photon flux remains significant as far as 6 0mm compared to shorter wavelength fluxes UV C radiation spans from 0 1mm to 28mm UV B from 0 28mm to 0 315mm UV A from 0 315mm to 0 4mm the visible spectrum from 0 4mm to 0 7mm and NIR arguably from 0 7mm to 5 0mm beyond which the infrared is thermal 1 Shortwave radiation is distinguished from longwave radiation Downward shortwave radiation is related to solar irradiance and is sensitive to solar zenith angle and cloud cover 2 Contents 1 See also 2 Notes 3 External links 4 ReferencesSee also editOutgoing longwave radiationNotes edit However the definition of thermal infrared may start at wavelengths as short as 1 1mm longer than which optical instruments have difficulty measuring or anywhere between 2 0mm and 4 0mm depending on the method of measurement and its purpose L Chen G Yan T Wang H Ren J Calbo J Zhao R McKenzie 2012 Estimation of surface shortwave radiation components under all sky conditions Modeling and sensitivity analysis Remote Sensing of Environment 123 457 469 External links editNational Science Digital Library Shortwave radiation Measuring Solar Radiation The Solar Infrared Radiation Station SIRS A lesson plan that deals with shortwave radiation from the SIRS instrument References editZhang Y W B Rossow A A Lacis V Oinas and M I Mischenko 2004 Calculation of radiative fluxes from the surface to the top of atmosphere based on ISCCP and other global data sets Refinements of the radiative transfer model and the input data Journal of Geophysical Research Atmospheres 109 D19105 L Chen G Yan T Wang H Ren J Calbo J Zhao R McKenzie 2012 Estimation of surface shortwave radiation components under all sky conditions Modeling and sensitivity analysis Remote Sensing of Environment 123 457 469 nbsp This physics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Shortwave radiation optics amp oldid 1183268658, wikipedia, wiki, book, books, library,
