Search Results

You are looking at 1 - 5 of 5 items for :

  • TRMM Diabatic Heating x
  • All content x
Clear All
Tristan S. L’Ecuyer and Greg McGarragh

shortcoming of the previous version of the approach that applied only over oceanic surfaces. In the present version, only snow-covered surfaces are not considered because of challenges in modeling their properties and retrieving overlying clouds. Although techniques exist for these purposes, the additional effort required to adapt these techniques to the VIRS instrument is not justified, given TRMM’s tropical focus. Instead, variability in the visible reflectance of clear pixels on a monthly scale is used

Full access
Yasu-Masa Kodama, Masaki Katsumata, Shuichi Mori, Sinsuke Satoh, Yuki Hirose, and Hiroaki Ueda

) proposed trimodal characteristics of convection over tropical oceans, with shallow cumulus below trade inversions, congestus clouds with tops near the 0°C level, and cumulonimbus with tops near the tropopause. A stable layer near the 0°C level, maintained by the LH of melting snow ( Johnson et al. 1996 ), allows for the formation of congestus, which provides strong rainfall. In the subtropical oceans, congestus along with shallow cumulus mix the atmospheric boundary layer and the free troposphere and

Full access
Shoichi Shige, Yukari N. Takayabu, Satoshi Kida, Wei-Kuo Tao, Xiping Zeng, Chie Yokoyama, and Tristan L’Ecuyer

crystals, snow, and graupel; deposition of ice crystals; and sublimation of all ice hydrometeors, respectively. The first term on the right-hand side of Eq. (2) is the vertical eddy heat flux convergence from upward and downward cloud-scale motions, while the second term is the horizontal eddy heat flux convergence. The precipitation falling at a given time is not related to the heating/cooling that is occurring at that instant but rather to the accumulated heating/cooling that led up to the

Full access
Wei-Kuo Tao, Stephen Lang, Xiping Zeng, Shoichi Shige, and Yukari Takayabu

dominated by phase changes between water vapor and small liquid or frozen cloud-sized particles. It consists of the condensation of cloud droplets, evaporation of cloud droplets and raindrops, freezing of cloud droplets and raindrops, melting of snow and graupel/hail, and the deposition and sublimation of ice particles. In addition, eddy heat flux convergence from cloud motions can also redistribute the heating or cooling vertically and horizontally. LH cannot be measured directly with current

Full access
Mircea Grecu, William S. Olson, Chung-Lin Shie, Tristan S. L’Ecuyer, and Wei-Kuo Tao

, nonprecipitating cloud ice, snow, and graupel. Precipitation and latent + eddy heating profiles are evaluated every hour of simulation time at each model horizontal gridpoint. The model is run for three 30-day periods, nudged by the large-scale advective forcing of temperature, humidity, and horizontal winds, using the method described in Tao et al. (2003b) . Advective forcings are derived from rawinsonde array observations from the South China Sea Monsoon Experiment (SCSMEX) Northern Enhanced Sounding Array

Full access