Articles | Volume 9, issue 1
https://doi.org/10.5194/amt-9-215-2016
https://doi.org/10.5194/amt-9-215-2016
Research article
 | 
25 Jan 2016
Research article |  | 25 Jan 2016

Non-parametric and least squares Langley plot methods

P. W. Kiedron and J. J. Michalsky

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Cited articles

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Cachorro, V. E., Romero, P. M., Toledano, C., Cuevas, E., and de Frutos, A. M.: The fictitious diurnal cycle of aerosol optical depth: A new approach for “in situ” calibration and correction of AOD data series, Geophys. Res. Lett., 31, L12106, https://doi.org/10.1029/2004GL019651, 2004.
Cachorro, V. E., Toledano, C., Berjón, A., de Frutos, A. M., Torres, B., Sorribas, M., and Laulainen, N. S.: An “in situ” calibration correction procedure (KCICLO) based on AOD diurnal cycle: Application to AERONET–El Arenosillo (Spain) AOD data series, J. Geophys. Res., 113, D12205, https://doi.org/10.1029/2007JD009673, 2008.
Campanelli, M., Nakajima, T., and Olivieri, B.: Determination of the solar calibration constant for a sun-sky radiometer: Proposal of an in situ procedure, Appl. Optics, 43, 651–659, 2004.
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Short summary
Langley plots are plots of the ln(V0) vs. air mass m used to calibrate sun radiometers, mainly, to determine the aerosol component of the atmosphere assuming attenuation follows V = V0·exp(−τ·m). This is simple if the atmosphere is stable since the intercept of this plot is ln(V0), which can then be used to solve for tau for any measured V. The atmosphere is not stable; therefore, 11 methods to measure V0s and determine robust estimates of V0s for interesting field sites are discussed.
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