Statistical Characteristics of Raindrop Size Distribution in the Meiyu Season Observed in Eastern China

Chen, Baojun; Yang, Jing; Pu, Jiangping

doi:10.2151/jmsj.2013-208

Cited by 153 publications

(217 citation statements)

References 46 publications

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“…Chen et al . [] investigated DSDs in the Baiu (called “Meiyu” in China) period in eastern China. Their stratiform rain, however, was weaker than that in the present study (<10 mm h −1 ), giving a smaller mass‐weighted mean diameter and a smaller N w than the mean D 0 r and N w r of the present study.…”

Section: Discussionsupporting

confidence: 54%

Vertical distribution of precipitation particles in Baiu frontal stratiform intense rainfall around Okinawa Island, Japan

et al. 2015

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The vertical distribution of precipitation particles in an intensely precipitating stratiform cloud associated with the Baiu front around Okinawa Island was observed. X‐band polarimetric radar, disdrometer, and hydrometeor videosonde data were used to examine the precipitation processes. The cloud top was approximately 12 km above sea level, as convection was depressed while stratiform regions developed near Okinawa Island. In the rain region below 3 km, the mean median volume diameter of the raindrop size distribution (DSD) estimated from the radar variables was 1.55 mm, and the mean normalized intercept parameter was 104.12 mm−1 m−3 with a mean radar reflectivity of 40.5 dBZe. The DSD indicates that the stratiform precipitation was characterized by higher number concentrations of smaller drops than observed previously in convective cells in a Baiu frontal convective precipitation region around Okinawa Island. The DSD also suggests the presence of larger raindrops than in convective cells embedded in a Baiu frontal stratiform precipitation region around Okinawa Island. In the ice region at 5–6 km, just above the melting layer and 6 km below the cloud top, the differential reflectivity and specific differential phase showed positive values, and videosonde measurements revealed that the number concentration of column‐, plate‐, and capped‐column‐like crystals (maximum dimensions of ≥0.1 mm) was 112 L−1. The high number concentration of these crystals contributed to the intense stratiform rainfall associated with the Baiu front.

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Section: Discussionsupporting

confidence: 54%

Vertical distribution of precipitation particles in Baiu frontal stratiform intense rainfall around Okinawa Island, Japan

et al. 2015

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“…[] examined the statistical characteristics of DSDs during the Meiyu season at Nanjing China, using 3 year observations from a first‐generation one‐dimensional (1‐D) laser‐optical Particle Size Velocity (PARSIVEL) disdrometer manufactured by OTT Germany. Their results show that the concentration of raindrops is slightly lower, and the median raindrop diameter is higher than those observed in some other subtropical locations and even during Baiu (Meiyu is named Baiu in Japan) in Japan [ Bringi et al ., ; Chen et al ., ]. Tang et al .…”

Section: Introductionmentioning

confidence: 99%

Statistical characteristics of raindrop size distributions observed in East China during the Asian summer monsoon season using 2‐D video disdrometer and Micro Rain Radar data

et al. 2016

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The characteristics of raindrop size distributions (DSDs) and vertical structures of rainfall during the Asian summer monsoon season in East China are studied using measurements from a ground‐based two‐dimensional video disdrometer (2DVD) and a vertically pointing Micro Rain Radar (MRR). Based on rainfall intensity and vertical structure of radar reflectivity, the observed rainfall is classified into convective, stratiform, and shallow precipitation types. Among them, shallow precipitation has previously been ignored or treated as outliers due to limitations in traditional surface measurements. Using advanced instruments of 2DVD and MRR, the characteristics of shallow precipitation are quantified. Furthermore, summer rainfall in the study region is found to consist mainly of stratiform rain in terms of frequency of occurrence but is dominated by convective rain in terms of accumulated rainfall amount. Further separation of the summer season into time periods before, during, and after the Meiyu season reveals that intrasummer variation of DSDs is mainly due to changes in percentage occurrence of the three precipitation types, while the characteristics of each type remain largely unchanged throughout the summer. Overall, higher raindrop concentrations and smaller diameters are found compared to monsoon precipitation at other locations in Asia. Higher local aerosol concentration is speculated to be the cause. Finally, rainfall estimation relationships using polarimetric radar measurements are derived and discussed. These new relationships agree well with rain gauge measurements and are more accurate than traditional relations, especially at high and low rain rates.

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“…Battan (1973) reported 69 Z-R relationships obtained from around the world. Chen et al (2013) derived Z = 368R…”

Section: Relationship Between Radar Reflectivity Andmentioning

confidence: 99%

“…Yin et al (2011 summarized the microphysical particle concentrations and size distributions based on the long-term in situ observation data. Chen et al (2013) analyzed the characteristics of raindrop-size distribution during the Meiyu season. Vol.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Cloud-Precipitation Microphysical Properties between East Asia and Other Regions

Yin

Wang

Zhai

2013

Journal of the Meteorological Society of Japan

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A database is established that includes microphysical properties of raindrops, cloud droplets, ice nuclei (IN), snow crystals, and the relationship between radar reflectivity (Z ) and rainfall rate (R), based on the in situ data reported in the existing literature. The data coverage is divided into East Asia and the other regions (Americas, Europe, Australia, and Africa), and only the datasets obtained over land are considered. The main properties of microphysical variables over East Asia are presented and compared with those over the other regions. The main differences of the properties between those two regions are as follows. The average intercept (N0) of exponential-size distributions is much smaller over East Asia than that over the other regions and slope (λ) is slightly smaller. As for gamma-size distributions, the overall average value of intercept is much smaller over East Asia, and the range of parameters is narrower in East Asia compared with the other regions. In addition, most of the shape parameter γ are negative over East Asia, whereas positive γ appears frequently in the other regions. Compared with the other regions, the average cloud droplet concentration is much smaller in stratiform clouds over East Asia, and cloud liquid water content in East Asia is 0.114 g m −3 lower. There is a higher total mean IN concentration of 20.2 L −1 in East Asia, whereas it is 2.7 L −1 in the other regions. Compared with the other regions, the average N0 for snow-crystal-size distributions over East Asia is much smaller and λ is less than half of that. The Z-R relation shows that the average Z is larger in East Asia than that in the other regions for rains originating from convective clouds with the same R, whereas the average Z is slightly smaller in East Asia for rains originating from stratiform clouds.

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Statistical Characteristics of Raindrop Size Distribution in the Meiyu Season Observed in Eastern China

Cited by 153 publications

References 46 publications

Vertical distribution of precipitation particles in Baiu frontal stratiform intense rainfall around Okinawa Island, Japan

Vertical distribution of precipitation particles in Baiu frontal stratiform intense rainfall around Okinawa Island, Japan

Statistical characteristics of raindrop size distributions observed in East China during the Asian summer monsoon season using 2‐D video disdrometer and Micro Rain Radar data

A Comparative Study of Cloud-Precipitation Microphysical Properties between East Asia and Other Regions

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