Home   About the Journal   Ľ
CLOUD RADIATIVE AND MICROPHYSICAL EFFECTS ON THE RELATION BETWEEN SPATIAL MEAN RAIN RATE, RAIN INTENSITY AND FRACTIONAL RAINFALL COVERAGE
  Revised:June 15, 2018
KeyWords:pre-summer torrential rainfall  radiative effects of liquid and ice clouds  rain rate  rain intensity  fractional rainfall coverage
Fund:
Author NameAffiliationE-mail
ZHANG Xiao-yi 1. Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027 China
2. Airlines Operations Center, Xiamen Air, Hangzhou 311207 China
3. Zhejiang Province Meteorological Observatory, Hangzhou 310017 China 
 
ZHANG Zi-han   
LI Xiao-fan  xiaofanli@zju.edu.cn 
Hits: 509
Download times: 
Abstract:
      Cloud radiative and microphysical effects on the relation between spatial mean rain rate, rain intensity and fractional rainfall coverage are investigated in this study by conducting and analyzing a series of two-dimensional cloud resolving model sensitivity experiments of pre-summer torrential rainfall in June 2008. The analysis of time-mean data shows that the exclusion of radiative effects of liquid clouds reduces domain mean rain rate by decreasing convective rain rate mainly through the reduced convective-rainfall area associated with the strengthened hydrometeor gain in the presence of radiative effects of ice clouds, whereas it increases domain mean rain rate by enhancing convective rain rate mainly via the intensified convective rain intensity associated with the enhanced net condensation in the absence of radiative effects of ice clouds. The removal of radiative effects of ice clouds decreases domain mean rain rate by reducing stratiform rain rate through the suppressed stratiform rain intensity related to the suppressed net condensation in the presence of radiative effects of liquid clouds, whereas it increases domain mean rain rate by strengthening convective rain rate mainly via the enhanced convective rain intensity in response to the enhanced net condensation in the absence of radiative effects of liquid clouds. The elimination of microphysical effects of ice clouds suppresses domain mean rain rate by reducing stratiform rain rate through the reduced stratiform-rainfall area associated with severely reduced hydrometeor loss.
DOI10.16555/j.1006-8775.2018.03.0