EPJ Web of Conferences (Jan 2018)

Refinement of the CALIOP cloud mask algorithm

  • Katagiri Shuichiro,
  • Sato Kaori,
  • Ohta Kohei,
  • Okamoto Hajime

DOI
https://doi.org/10.1051/epjconf/201817605043
Journal volume & issue
Vol. 176
p. 05043

Abstract

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A modified cloud mask algorithm was applied to the CALIOP data to have more ability to detect the clouds in the lower atmosphere. In this algorithm, we also adopt the fully attenuation discrimination and the remain noise estimation using the data obtained at an altitude of 40 km to avoid contamination of stratospheric aerosols. The new cloud mask shows an increase in the lower cloud fraction. Comparison of the results to the data observed with a PML ground observation was also made.