Abstract
A new iterative algorithm is developed to estimate LIDAR ratio for a thin
cirrus cloud over an aerosol layer. First, the thin cirrus cloud is screened out and
replaced by a modeled LIDAR signal and the extinction coefficients of the aerosol
layer are derived using the Fernald backward method. These aerosol coefficients are
referred as the "actual values". Second, the original LIDAR signal which
includes the thin cirrus cloud is also inverted by the Fernald backward method down
to the aerosol layer but using different LIDAR ratio for the thin cirrus cloud.
Depending on the different assumptions about the LIDAR ratio of the thin cirrus
cloud, different sets of aerosol extinction can be derived. The "actual
values" which are found in the first step can be used to constrain this
iterative progress and the correct LIDAR ratio of the thin cirrus cloud can be
found. The detailed description of this method and retrieval examples are given in
the paper. The cases compared with other methods are presented and the statistical
result is also shown and agrees well with other studies.
© 2011 Optical Society of Korea
PDF Article
More Like This
Cited By
Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.