論文

査読有り
2013年7月

Evaluating cloud microphysics from NICAM against CloudSat and CALIPSO

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
  • Tempei Hashino
  • ,
  • Masaki Satoh
  • ,
  • Yuichiro Hagihara
  • ,
  • Takuji Kubota
  • ,
  • Toshihisa Matsui
  • ,
  • Tomoe Nasuno
  • ,
  • Hajime Okamoto

118
13
開始ページ
7273
終了ページ
7292
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/jgrd.50564
出版者・発行元
AMER GEOPHYSICAL UNION

We describe a method to evaluate cloud microphysics simulated with a global cloud-resolving model against CloudSat and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite data. Output from the Nonhydrostatic Icosahedral Atmospheric Model (NICAM) is run through a satellite-sensor simulator (Joint Simulator for Satellite Sensors), then directly compared to the radar and lidar signals from CloudSat and CALIPSO. The forward approach allows for consistency in cloud microphysical assumption involved in the evaluation. To investigate the dependence of the signals on the temperature, we use temperature extensively as the vertical coordinate. The global statistical analysis of the radar reflectivity shows that the simulation overestimates all the percentiles above -50 degrees C and that snow category contributes significantly to low reflectivity values between -80 and -40 degrees C. The simulated lidar signals have two modes associated with cloud ice and snow categories, though the observations have only one mode. The synergetic use of radar reflectivity and lidar backscatter enables us to determine the relative magnitudes of ice/liquid water contents and effective radii without use of retrievals. The radar-and-lidar diagnosis for cloud tops shows that, due to snow category, NICAM overestimates the mass-equivalent effective radius and underestimates ice water content. Also, the diagnosis was shown to be useful to investigate sensitivities of the parameters of bulk microphysical schemes on the water contents and sizes. The nonspherical scattering of ice particles was shown to affect the above radar-and-lidar diagnosis for large reflectivity ranges but not to alter most of the other diagnoses for this simulation.

リンク情報
DOI
https://doi.org/10.1002/jgrd.50564
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000322192200025&DestApp=WOS_CPL
ID情報
  • DOI : 10.1002/jgrd.50564
  • ISSN : 2169-897X
  • Web of Science ID : WOS:000322192200025

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