Article

Climate Dynamics

, Volume 35, Issue 4, pp 567-576

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

Diurnal phase of late-night against late-afternoon of stratiform and convective precipitation in summer southern contiguous China

  • Rucong YuAffiliated withLASG, Institute of Atmospheric Physics, Chinese Academy of SciencesLaSW, Chinese Academy of Meteorological Sciences, China Meteorological Administration Email author 
  • , Weihua YuanAffiliated withLASG, Institute of Atmospheric Physics, Chinese Academy of SciencesGraduate School of the Chinese Academy of Sciences
  • , Jian LiAffiliated withLaSW, Chinese Academy of Meteorological Sciences, China Meteorological Administration
  • , Yunfei FuAffiliated withLASG, Institute of Atmospheric Physics, Chinese Academy of SciencesLaboratory of Satellite Remote Sensing and Climate Environment, University of Science and Technology of China

Abstract

Using the tropical rainfall measuring mission (TRMM) Precipitation Radar (PR) observations combined with the surface rain gauge data during 1998–2006, the robust diurnal features of summer stratiform and convective precipitation over the southern contiguous China are revealed by exploring the diurnal variations of rain rate and precipitation profile. The precipitation over the southern contiguous China exhibits two distinguishing diurnal phases: late-night (2200–0600 LST) and late-afternoon (1400–2200 LST), dependent on the location, precipitation type and duration time. Generally, the maximum rain rate and the highest profile of stratiform precipitation occur in the late-afternoon (late-night) over the southeastern (southwestern) China, while most of the stratiform short-duration rain rate tends to present late-afternoon peaks over the southern China. For convective precipitation, the maximum rain rate and the highest profile occur in the late-afternoon over most of the southern contiguous China, while the convective long-duration rain rate exhibits late-night peaks over the southwestern China. Without regional dependence, the convective precipitation exhibits much larger amplitude of diurnal variations in both near surface rain rate and vertical extension compared with stratiform precipitation and the convective rain top rises most rapidly between noon and afternoon. However, there are two distinctive sub-regions. The diurnal phases of precipitation there are very weakly dependent on precipitation type and duration time. Over the eastern periphery of the Tibetan Plateau, the maximum rain rate and the highest profile of either convective or stratiform precipitation occur in the late-night. Over the southeastern coastal regions, both the near surface rain rate and rain top of convective and stratiform precipitation peak in the late-afternoon.

Keywords

Diurnal cycle Stratiform precipitation Convective precipitation Rainfall duration