Effects of Vertical Wind Shear

摘要: The effects of vertical wind shear on convective development have been examined for decades (e.g., Pastushkov 1975; Corbosiero and Molinari 2002; Lang et al. 2007; Ueno 2007). delayed initiation convection is associated with a strong Xu 1992). affects through the change in transport horizontal momentum Wu Yanai 1994). becomes increasingly organized lines because lower-tropospheric Robe Emanuel 2001). Vertical shears affect two ways. First, intensity systems dynamic instability. degree instability can be described by secondary circulation, which quantified magnitude perturbation kinetic energy. structures large-scale winds may alter energy exchange between energy, determined covariance velocity presence Peixoto Oort 1992; Li 2002). Second, impacts systems. Unicell multicell convections are unidirectional reverse shears, respectively Tao 2003). In this chapter, sensitivity experiments excluded (BILISNWVS, PSRNVWS) compared control included (BILIS, PSR) to discuss rainfall processes during landfall sever tropical storm Bilis (2006) pre-summer heavy event over southern China June 2008, based Wang (2009) Shen (2011). These identical except vertically varying zonal replaced mass-weighted mean from experiments.