Comparison of Convective and Stratiform Precipitation Properties in Developing and Nondeveloping Tropical Disturbances Observed by the Global Precipitation Measurement over the Western North Pacific

• DOI: 10.2151/jmsj.2020-056
• Publication Date: 2020-07-12T22:05:09Z
• Authors: Ke WANG; Guanghua CHEN; Xinxin BI; Donglei SHI; Kexin CHEN
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

The tropical oceans spawn hundreds of disturbances during the cyclone (TC) peak season every year, but only a small fraction eventually develop into TCs. In this study, using observations from Global Precipitation Measurement (GPM) satellite, over western North Pacific (WNP) July to October 2014–2016 are categorized developing and nondeveloping groups investigate differences between satellite-retrieved convective stratiform precipitation properties in both inner-core (within 200 km disturbance center) outer-core 200–400 regions. experience remarkably more oscillatory process region than region. large areal coverage strong rainfall breaks scattered remnants then reorganizes strengthens near center again. Contrarily, characteristics group evolve smoothly. It can be summarized that prone TC WNP satisfy two essential preconditions terms characteristics. First, covers is within 400 center. mean vertically integrated unconditional latent heating rate above 5.5 6.6 K h−1 2.4 h−1, respectively; thus, makes major contribution warming upper troposphere. Second, occurs Compared with precipitation, which plays critical role mid-to-upper levels, most striking feature it heats mid-to-lower Overall, formation TCs evolving parent regarded as an outcome joint distinct types (convective stratiform) clouds.