Publication Abstracts

Pedrós et al. 2010

Pedrós, R., V. Estellés, M. Sicard, J.L. Gómez-Amo, M.P. Utrillas, J.A. Martínez-Lozano, F. Rocadenbosch, C. Pérez, and J.M. Baldasano Recio, 2010: Climatology of the aerosol extinction-to-backscatter ratio from Sun-photometric measurements. IEEE Trans. Geosci. Remote Sens., 48, 237-249.

The elastic lidar equation contains two unknown atmospheric parameters, namely, the particulate optical extinction and backscatter coefficients, which are related through the lidar ratio (i.e., the particulate-extinction-to-backscatter ratio). So far, independent inversion of the lidar signal has been carried out by means of Raman lidars (usually limited to night-time measurements), high-spectral-resolution lidars, or scanning elastic lidars under the assumption of a homogeneously vertically stratified atmosphere. In this paper, we present a procedure to obtain the lidar ratio at 532 nm by a combined Sun-photometer-aerosol-model inversion, where the viability of the solution is largely reinforced by assimilating categorized air-mass back-trajectory information. Thus, iterative lidar-ratio tuning to reconstruct the Sun-photometric aerosol optical depth (AOD) is additionally constrained by the air-mass back trajectories provided by the hybrid single-particle Lagrangian integrated-trajectory model. The retrieved lidar ratios are validated with inversions of lidar data based on the Klett-Fernald-Sasano algorithm and with the Aerosol Robotic Network (AERONET)-retrieved lidar ratios. The estimated lidar ratios concur with the AERONET-retrieved lidar ratios and with those of the well-known KFS inversion constrained with Sun-photometric AOD values and embedded single-scattering models. The proposed method can be applied to routinely extract climatological values of the lidar ratio using measurements of direct solar irradiance (more numerous than those of sky radiance).

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BibTeX Citation

  author={Pedrós, R. and Estellés, V. and Sicard, M. and Gómez-Amo, J. L. and Utrillas, M. P. and Martínez-Lozano, J. A. and Rocadenbosch, F. and Pérez, C. and Baldasano Recio, J. M.},
  title={Climatology of the aerosol extinction-to-backscatter ratio from Sun-photometric measurements},
  journal={IEEE Trans. Geosci. Remote Sens.},

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RIS Citation

ID  - pe09400v
AU  - Pedrós, R.
AU  - Estellés, V.
AU  - Sicard, M.
AU  - Gómez-Amo, J. L.
AU  - Utrillas, M. P.
AU  - Martínez-Lozano, J. A.
AU  - Rocadenbosch, F.
AU  - Pérez, C.
AU  - Baldasano Recio, J. M.
PY  - 2010
TI  - Climatology of the aerosol extinction-to-backscatter ratio from Sun-photometric measurements
JA  - IEEE Trans. Geosci. Remote Sens.
VL  - 48
SP  - 237
EP  - 249
ER  -

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