Improved retrievals of the optical properties of cirrus clouds by a combination of lidar methods.

We focus on improvement of the retrieval of optical properties of cirrus clouds by combining two lidar methods. We retrieve the cloud's optical depth by using independently the molecular backscattering profile below and above the cloud [molecular integration (MI) method] and the backscattering profile inside the cloud with an a priori effective lidar ratio [particle integration (PI) method]. When the MI method is reliable, the combined MI-PI method allows us to retrieve the optimal effective lidar ratio. We compare these results with Raman lidar retrievals. We then use the derived optimal effective lidar ratio for retrieval with the PI method for situations in which the MI method cannot be applied.

[1]  Charles W. Antill,et al.  Lidar In-Space Technology Experiment (LITE): NASA's first in-space lidar system for atmospheric research , 1991 .

[2]  J. Klett.  Stable analytical inversion solution for processing lidar returns. , 1981, Applied optics.

[3]  A. Macke,et al.  Scattering of light by polyhedral ice crystals. , 1993, Applied optics.

[4]  K. Liou.  Influence of Cirrus Clouds on Weather and Climate Processes: A Global Perspective , 1986 .

[5]  Alain Hauchecorne,et al.  Cirrus climatological results from lidar measurements at OHP (44°N, 6°E) , 2001 .

[6]  David M. Winker,et al.  The CALIPSO mission: spaceborne lidar for observation of aerosols and clouds , 2003, SPIE Asia-Pacific Remote Sensing.

[7]  Kenneth Sassen,et al.  Subvisual-Thin Cirrus Lidar Dataset for Satellite Verification and Climatological Research , 1992 .

[8]  A. Ansmann,et al.  Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar. , 1992, Applied optics.

[9]  A. Hedin.  Extension of the MSIS Thermosphere Model into the middle and lower atmosphere , 1991 .

[10]  V. Ramanathan,et al.  Thermodynamic regulation of ocean warming by cirrus clouds deduced from observations of the 1987 El Niño , 1991, Nature.

[11]  K. Liou,et al.  Solar Radiative Transfer in Cirrus Clouds. Part I: Single-Scattering and Optical Properties of Hexagonal Ice Crystals , 1989 .

[12]  F. G. Fernald.  Analysis of atmospheric lidar observations: some comments. , 1984, Applied optics.

[13]  P. Flamant,et al.  Iterative method to determine an averaged backscatter-to-extinction ratio in cirrus clouds. , 1996, Applied optics.

[14]  Bryan A. Baum,et al.  Remote sensing of cloud properties using MODIS airborne simulator imagery during SUCCESS: 1. Data and models , 2000 .

[15]  A. Ansmann,et al.  Combined raman elastic-backscatter LIDAR for vertical profiling of moisture, aerosol extinction, backscatter, and LIDAR ratio , 1992 .

[16]  J. Nee,et al.  Lidar Observation of the Cirrus Cloud in the Tropopause at Chung-Li (25°N, 121°E) , 1998 .

[17]  K. Liou,et al.  Light scattering by nonspherical particles: remote sensing and climatic implications , 1994 .

[18]  U. Wandinger,et al.  Multiple-Scattering Influence on Extinction-and Backscatter-Coefficient Measurements with Raman and High-Spectral-Resolution Lidars. , 1998, Applied optics.

[19]  R. Lindzen,et al.  Does The Earth Have an Adaptive Infrared Iris , 2013 .

[20]  P. Keckhut,et al.  A sub‐tropical cirrus clouds climatology from Reunion Island (21°S, 55°E) lidar data set , 2003 .

[21]  W. Paul Menzel,et al.  Remote sensing of cloud properties using MODIS airborne simulator imagery during SUCCESS: 2. Cloud thermodynamic phase , 2000 .

[22]  A. Macke,et al.  Single Scattering Properties of Atmospheric Ice Crystals , 1996 .

[23]  Lidar network observations of cirrus morphological and scattering properties during the International Cirrus Experiment 1989 : the 18 October 1989 case study and statistical analysis , 1993 .

[24]  Yoshihide Takano,et al.  Radiative Transfer in Cirrus Clouds. Part III: Light Scattering by Irregular Ice Crystals , 1995 .

[25]  C. Platt,et al.  Lidar and Radiometric Observations of Cirrus Clouds , 1973 .

[26]  C. Platt,et al.  Determination of the cirrus particle single-scattering phase function from lidar and solar radiometric data. , 1984, Applied optics.

[27]  D. Winker,et al.  Laminar cirrus observed near the tropical tropopause by LITE , 1998 .

[28]  J. Nee,et al.  Lidar ratio and depolarization ratio for cirrus clouds. , 2002, Applied optics.

[29]  Sverre Grimnes.  Chapter 7 – Data and models , 2000 .

[30]  L. Radke,et al.  A Summary of the Physical Properties of Cirrus Clouds , 1990 .

[31]  Paul W. Stackhouse,et al.  The Relevance of the Microphysical and Radiative Properties of Cirrus Clouds to Climate and Climatic Feedback , 1990 .

[32]  B. Wielicki,et al.  The Iris Hypothesis: A Negative or Positive Cloud Feedback?. , 2002 .