Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: American Geophysical Union
Languages: English
Types: Article
A detailed spectrally-resolved extraterrestrial solar spectrum (ESS) is important for line-by-line radiative transfer modeling in the near-infrared (near-IR). Very few observationally-based high-resolution ESS are available in this spectral region. Consequently the theoretically-calculated ESS by Kurucz has been widely adopted. We present the CAVIAR (Continuum Absorption at Visible and Infrared Wavelengths and its Atmospheric Relevance) ESS which is derived using the Langley technique applied to calibrated observations using a ground-based high-resolution Fourier transform spectrometer (FTS) in atmospheric windows from 2000–10000 cm-1 (1–5 μm). There is good agreement between the strengths and positions of solar lines between the CAVIAR and the satellite-based ACE-FTS (Atmospheric Chemistry Experiment-FTS) ESS, in the spectral region where they overlap, and good agreement with other ground-based FTS measurements in two near-IR windows. However there are significant differences in the structure between the CAVIAR ESS and spectra from semi-empirical models. In addition, we found a difference of up to 8 % in the absolute (and hence the wavelength-integrated) irradiance between the CAVIAR ESS and that of Thuillier et al., which was based on measurements from the Atmospheric Laboratory for Applications and Science satellite and other sources. In many spectral regions, this difference is significant, as the coverage factor k = 2 (or 95 % confidence limit) uncertainties in the two sets of observations do not overlap. Since the total solar irradiance is relatively well constrained, if the CAVIAR ESS is correct, then this would indicate an integrated “loss” of solar irradiance of about 30 W m-2 in the near-IR that would have to be compensated by an increase at other wavelengths.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Arvesen, J., R. Griffin Jr., and B. Douglas Pearson Jr. (1969), Determination of extraterrestrial solar spectral irradiance from a research aircraft, Appl. Opt., 8, 2215-2232.
    • Burlov-Vasijev, K., E. Gurtovenko, and Y. Matvejev (1995), New absolute measurements of the solar spectrum 310-685 nm, Sol. Phys., 157, 51-73.
    • Carbone, S., L. Padilha, M. Rosa, D. Pinheiro, and N. Schuch (2006), First estimation of the aerosol optical thickness using Langley method at Southern Brazil (29.40S, 53.80W), Adv. Space Res., 37(12), 2178-2182.
    • Casanova, S. E. B., K. P. Shine, T. Gardiner, M. Coleman, and H. Pegrum (2006), Assessment of the consistency of near-infrared water vapor line intensities using high-spectral-resolution ground-based Fourier transform measurements of solar radiation, J. Geophys. Res., 111, D11302, doi:10.1029/2005JD006583.
    • Chance, K., and R. Kurucz (2010), An improved high-resolution solar reference spectrum for Earth's atmosphere measurements in the ultraviolet, visible, and near infrared, J. Quant. Spectrosc. Radiat. Transfer, 111, 1289-1295, doi:10.1016/j.jqsrt.2010.01.036.
    • Farmer C. B., and R. H. Norton (1989), High-resolution atlas of the infrared spectrum of the Sun and the Earth atmosphere from space, Volume I, The Sun, NASA Reference Publication 1224.
    • Fontenla, J. M., J. Harder, W. Livingston, M. Snow, and T. Woods (2011), High-resolution solar spectral irradiance from extreme ultraviolet to far infrared, J. Geophys. Res., 116, D20108, doi:10.1029/2011JD01032.
    • Gardiner, T. D., M. Coleman, H. Browning, L. Tallis, I. V. Ptashnik, and K. P. Shine (2012), Absolute high spectral resolution measurements of surface solar radiation for detection of water vapour continuum absorption, Philos. Trans. R. Soc. A: Math., Phys. Eng. Sci., 370(1968), 2489-2803, doi:10.1098/rsta.2011.0221.
    • Hall, L., and G. Anderson (1991), High-resolution solar spectrum between 2000 and 3100 Å, J. Geophys. Res., 96, 12927-12931.
    • Harder, J., G. Thuillier, E. Richard, S. Brown, R. Lykke, M. Snow, W. McClintock, J. Fontenla, T. Woods, and P. Pilewskie (2010), The SORCE SIM solar spectrum: comparison with recent observations, Sol. Phys., 263, 3-24, doi:10.1007/s11207-010-9555-y.
    • Harrison, L., and J. Michalsky (1994), Objective algorithms for the retrieval of optical depths from ground-based measurements, Appl. Opt., 33(22), 5126-5132.
    • Harrison, L., P. Kiedron, J. Berndt, and J. Schlemmer (2003), Extraterrestrial solar spectrum 360-1050 nm from Rotating Shadowband Spectrometer measurements at the Southern Great Plains (ARM) sites, J. Geophys. Res., 108(D14), 4424, doi:10.1029/2001JD001311.
    • Hase, F., L. Wallace, S. McLeod, J. Harrison, and P. Bernath (2010), The ACE-FTS atlas of the infrared solar spectrum, J. Quant. Spectrosc. Radiat. Transfer, 111, 521-528, doi:10.1016/j.jqrst.2009.10.020.
    • Iqbal, M. (1983), An Introduction to Solar Radiation, Academic Press Inc, New York, 390 pp.
    • Kopp, G., and J. L. Lean (2011), A new, lower value of total solar irradiance: Evidence and climate significance, Geophys. Res. Lett., 38, L01706, doi:10.1029/2010GL045777.
    • Kurucz, R. L. (2005), The Solar Irradiance by Computation. Can be obtained online from http://kurucz.harvard.edu/sun.html or by contacting the author.
    • Kurucz, R. L. (2008), High Resolution Irradiance Spectra 1560-1720 and 1920-2100 nm. Can be obtained online from http://kurucz.harvard.edu/ sun/irradiance2008/ or by contacting the author.
    • Liou, K. N. (2002), An Introduction to Atmospheric Radiation, Academic Press, Oxford, England, 583 pp.
    • Mlawer, E. J., V. H. Payne, J.-L. Moncet, J. S. Delamere, M. J. Alvarado, and D. D. Tobin (2012), Development and recent evaluation of the MT_CKD model of continuum absorption, Philos. Trans. R. Soc. A: Math., Phys. Eng. Sci., 370(1968), 2489-2803, doi:10.1098/rsta.2011.0295.
    • Mitsel, A. A., I. V. Ptashnik, K. M. Firsov, and B. A. Fomin (1995), Efficient technique for line-by-line calculating the transmittance of the absorbing atmosphere, Atmos. Oceanic Opt., 8(10), 847-850.
    • Rothman, L. S., et al. (2009), The HITRAN 2008 molecular spectroscopic database, J. Quant. Spectrosc. Radiat. Transfer, 110, 533-572, doi:10.1016/j. jqrst.2009.02.013.
    • Shaw, G., J. Reagan, and B. Herman (1973), Investigation of atmospheric extinction using direct solar radiation measurements made with a multiple wavelength radiometer, J. Appl. Meteorol., 12, 374-380.
    • Tallis, L., M. Coleman, T. Gardiner, I. V. Ptashnik, and K. P. Shine (2011), Assessment of the consistency of H2O line intensities over the nearinfrared using sun-pointing ground-based Fourier transform spectroscopy, J. Quant. Spectrosc. Radiat. Transfer, 112, 2268-2280, doi:10.1016/j. jqsrt.2011.06.007.
    • Thuillier, G., L. Floyd, T. Woods, R. Cebula, E. Hilsenrath, M. Hersé, and D. Labs (2004), Solar irradiance reference spectra, in Solar Variability and Its Effects on Climate, volume 141 of Geophysical Monograph, edited by J. Pap, and P. Fox, pp. 171-194, American Geophysical Union, Washington DC.
    • Thuillier, G., M. Hersé, D. Labs, W. Peetermans, D. Gillotay, P. Simon, and H. Mandel (2003), The solar spectral irradiance from 200 to 2400 nm as measured by the SOLSPEC spectrometer from the ATLAS andEURECA missions, Sol. Phys., 214, 1-22.
    • Trenberth, K., J. Fasullo, and J. Kiehl (2009), Earth's Global EnergyBudget, Bull. Am. Meteorol. Soc., 90(3), 311-324, doi:10.1175/2008BAMS2634.1.
    • Wang, S., T. J. Pongetti, S. P. Sander, E. Spinei, G. H. Mount, A. Cede, and J. Herman (2010), Direct Sun measurements of NO2 column abundances from Table Mountain, California: Intercomparison of low- and highresolution spectrometers, J. Geophys. Res., 115, D13305, doi:10.1029/ 2009JD013503.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article