Article Details

Warm-Season Diurnal Variations of Total, Stratiform, Convective, and Extreme Hourly Precipitation over Central and Eastern China

Oleh   Zhenhua HUO1,2 [-]
Kontributor / Dosen Pembimbing : Yanduo GONG 1 , 2 , 4 , Jiong CHEN 1 , and Fuyou TIAN 1
Jenis Koleksi : Jurnal elektronik
Penerbit : Lain-lain
Fakultas :
Subjek : Generalities
Kata Kunci : diurnal variation, total precipitation, stratiform precipitation, convective precipitation, extreme precipitation
Staf Input/Edit : SYSTEM   Ena Sukmana
File : 0 file
Tanggal Input : 2018-12-20 10:29:36

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ABSTRACT Diurnal variations in amount, frequency and intensity of warm-season hourly precipitation (HP) at seven levels, which are defined as HP 0 . 1, 0.5, 1, 5, 10, 20 and 50 mm, are revealed based on no less than 30 years of hourly rain-gauge observations at national stations over central and eastern China (CEC). This study investigates the variations, relationships, di ff erences and similarities of total, stratiform, convective and extreme HP over the entire CEC and various subregions. Results indicate that the variations in the amount and frequency of HP at the seven levels over the entire CEC all display a bimodal feature. For various regions, the variations of total HP mostly feature two peaks, while convective HP mainly occurs in the late afternoon and determines the diurnal variation of total HP intensity. On the basis of the primary peak time periods of HP frequency at all levels over di ff erent subregions, the variations can be classified into three main categories: late-afternoon primary peak, nocturnal primary peak, and time-shifting primary peak. However, the variations over some coastal regions like the Liaodong Peninsula, the Shandong Peninsula, and the coastal regions of Guangdong, distinctly di ff er from those over their corresponding larger regions. Overall, the normalized diurnal variation amplitude of amount and frequency increases with the increasing HP intensity; convective precipitation can be represented by HP 10 mm; and the intensity of HP 50 mm is slightly larger during the nighttime than during the daytime over the entire CEC. In northern China, diurnal variation in HP 5 mm can represent well that in convective precipitation