Global statistics of liquid water content and effective number concentration of water clouds over ocean derived from combined CALIPSO and MODIS measurements Y. Hu1, M. Vaughan2, C. McClain3, M. Behrenfeld4, H. Maring5, D. Anderson5, S. Sun-Mack2, D. Flittner1, J. Huang2, B. Wielicki1, P. Minnis1, C. Weimer6, C. Trepte1, and R. Kuehn2 1NASA Langley Research Center, Hampton, Virginia, USA 2Science Systems and Applications, Inc., Hampton, Virginia, USA 3NASA Goddard Space Flight Center, Greenbelt, Maryland, USA 4Oregon State University, Corvallis, Oregon, USA 5NASA Headquarter, Washington, DC, USA 6Ball Aerospace & Technologies Corp., Builder, Colorado, USA
Abstract. This study presents an empirical relation that links the volume extinction
coefficients of water clouds, the layer integrated depolarization ratios
measured by lidar, and the effective radii of water clouds derived from
collocated passive sensor observations. Based on Monte Carlo simulations of
CALIPSO lidar observations, this method combines the cloud effective radius
reported by MODIS with the lidar depolarization ratios measured by CALIPSO to
estimate both the liquid water content and the effective number concentration
of water clouds. The method is applied to collocated CALIPSO and MODIS
measurements obtained during July and October of 2006, and January 2007.
Global statistics of the cloud liquid water content and effective number
concentration are presented.
Citation: Hu, Y., Vaughan, M., McClain, C., Behrenfeld, M., Maring, H., Anderson, D., Sun-Mack, S., Flittner, D., Huang, J., Wielicki, B., Minnis, P., Weimer, C., Trepte, C., and Kuehn, R.: Global statistics of liquid water content and effective number concentration of water clouds over ocean derived from combined CALIPSO and MODIS measurements, Atmos. Chem. Phys., 7, 3353-3359, doi:10.5194/acp-7-3353-2007, 2007.