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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 13 | Copyright
Atmos. Chem. Phys., 15, 7127-7153, 2015
https://doi.org/10.5194/acp-15-7127-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 01 Jul 2015

Research article | 01 Jul 2015

LIVAS: a 3-D multi-wavelength aerosol/cloud database based on CALIPSO and EARLINET

V. Amiridis1, E. Marinou1,2, A. Tsekeri1, U. Wandinger3, A. Schwarz3, E. Giannakaki4, R. Mamouri5, P. Kokkalis1, I. Binietoglou6, S. Solomos1, T. Herekakis1, S. Kazadzis7, E. Gerasopoulos8, E. Proestakis1,8, M. Kottas1, D. Balis2, A. Papayannis9, C. Kontoes1, K. Kourtidis10, N. Papagiannopoulos11, L. Mona11, G. Pappalardo11, O. Le Rille12, and A. Ansmann3 V. Amiridis et al.
  • 1Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens 15236, Greece
  • 2Aristotle University of Thessaloniki, Thessaloniki, Greece
  • 3Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany
  • 4Finnish Meteorological Institute, Kuopio Unit, Helsinki, Finland
  • 5Cyprus University of Technology, Limassol, Cyprus
  • 6National Institute of R&D for Optoelectronics, Bucharest, Romania
  • 7Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Davos, Switzerland
  • 8Institute of Environmental Research and Sustainable Development, National Observatory of Athens, Greece
  • 9National Technical University of Athens, Zografou, Greece
  • 10School of Engineering, Democritus University of Thrace, Xanthi, Greece
  • 11Istituto di Metodologie per l'Analisi Ambientale, Consiglio Nazionale delle Ricerche, Potenza, Italy
  • 12ESA/ESTEC, Postbus 299, 2200-AG Noordwijk, the Netherlands

Abstract. We present LIVAS (LIdar climatology of Vertical Aerosol Structure for space-based lidar simulation studies), a 3-D multi-wavelength global aerosol and cloud optical database, optimized to be used for future space-based lidar end-to-end simulations of realistic atmospheric scenarios as well as retrieval algorithm testing activities. The LIVAS database provides averaged profiles of aerosol optical properties for the potential spaceborne laser operating wavelengths of 355, 532, 1064, 1570 and 2050 nm and of cloud optical properties at the wavelength of 532 nm. The global database is based on CALIPSO observations at 532 and 1064 nm and on aerosol-type-dependent backscatter- and extinction-related Ångström exponents, derived from EARLINET (European Aerosol Research Lidar Network) ground-based measurements for the UV and scattering calculations for the IR wavelengths, using a combination of input data from AERONET, suitable aerosol models and recent literature. The required spectral conversions are calculated for each of the CALIPSO aerosol types and are applied to CALIPSO backscatter and extinction data corresponding to the aerosol type retrieved by the CALIPSO aerosol classification scheme. A cloud optical database based on CALIPSO measurements at 532 nm is also provided, neglecting wavelength conversion due to approximately neutral scattering behavior of clouds along the spectral range of LIVAS. Averages of particle linear depolarization ratio profiles at 532 nm are provided as well. Finally, vertical distributions for a set of selected scenes of specific atmospheric phenomena (e.g., dust outbreaks, volcanic eruptions, wild fires, polar stratospheric clouds) are analyzed and spectrally converted so as to be used as case studies for spaceborne lidar performance assessments. The final global data set includes 4-year (1 January 2008–31 December 2011) time-averaged CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) data on a uniform grid of 1° × 1° with the original high vertical resolution of CALIPSO in order to ensure realistic simulations of the atmospheric variability in lidar end-to-end simulations.

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LIVAS is a 3-D multi-wavelength global aerosol and cloud optical database optimized for future space-based lidar end-to-end simulations of realistic atmospheric scenarios as well as retrieval algorithm testing activities. The global database is based on CALIPSO observations at 532nm, while for the conversion at 355nm EARLINET data are utilized.
LIVAS is a 3-D multi-wavelength global aerosol and cloud optical database optimized for future...
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