Raindrop Size Distribution Characteristics of Indian and Pacific Ocean Tropical Cyclones Observed at India and Taiwan Sites

Janapati, Jayalakshmi; Seela, Balaji Kumar; Lin, Pay Liam; Wang, Pao K.; Tseng, Chie Huei; Reddy, K. Krishna; Hashiguchi, Hiroyuki; Lu, Feng; Das, Subrata Kumar; Unnikrishnan, C. K.

doi:10.2151/jmsj.2020-015

Cited by 45 publications

(53 citation statements)

References 61 publications

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“…rates, the distributions of D m get narrowed. Similar behavior was reported in previous studies on tropical cyclone and summer season rainfall (Kumar and Reddy, 2013;Wen et al, 2018;Chang et al, 2009;Janapati et al, 2020;Chen et al, 2019;Wu et al, 2019). For both TY and NTY rainy days, fewer variations in D m values for R > 25 mm h −1 is due to the reaching of RSD to equilibrium condition through raindrop breakup and coalescence, (Hu and Srivastava, 1995), and an increase in number concentration can lead to a further increase in rainfall rates (Bringi and Chandrasekar, 2001).…”

Section: The Rainfall Rate Relationships With D M and N Wsupporting

confidence: 86%

“…higher D m values in Pacific Ocean tropical cyclones than the Indian Ocean tropical cyclones (Janapati et al, 2020).…”

Section: Seasonal Characteristics Of Rsd Bymentioning

confidence: 76%

“…The normalized intercept parameter and mass-weighted mean diameter can provide the RSD features, and these parameters were found to show uniqueness with the rainfall rate (Chen et al, 2016;Janapati et al, 2020). Scatter plots of D m and log 10 N w versus R for TY and NTY rainy days are depicted in Fig.…”

Section: The Rainfall Rate Relationships With D M and N Wmentioning

confidence: 96%

“…Both remote-sensing and reanalysis data sets are interpolated to 0.125° × 0.125° over the disdrometer site. A brief description of these data sets can be found in (Seela et al, 2018;Janapati et al, 2020).…”

Section: Data Sets Usedmentioning

confidence: 99%

“…There has been an increasing interest in the RSD studies to elucidate the hydrological (Lin and Chen, 2012;Lu et al, 2008;Janapati et al, 2019;Chang et al, 2017), and microphysical characteristics (Chu and Su, 2008;Jung et al, 2012;Seela et al, 2017;Seela et al, 2018;Lee et al, 2019;Janapati et al, 2020) of different precipitating clouds in Taiwan. For instance, Chu and Su (2008) investigated the slope-shape relations for four different precipitations in north Taiwan.…”

Section: Introductionmentioning

confidence: 99%

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Microphysical features of typhoon and non-typhoon rainfall observed in Taiwan, an island in the northwest Pacific

Janapati¹,

Seela²,

Lin³

et al. 2020

Preprint

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Abstract. The microphysical features of the typhoon (TY) and non-typhoon (NTY) rainfall in summer seasons are analyzed using long-term (2004 to 2016) data from the impact disdrometer installed in north Taiwan. The RSD stratified based on rainfall rate showed distinct RSD characteristics between TY and NTY rainfall. More (less) number of small (big) size raindrops are noticed in TY rainfall than NTY rainfall. RSD features in terms of gamma parameters are studied for these two weather regimes. The mass-weighted mean diameter (Dm) values are higher in NTY than TY rainfall, and an inverse behavior is observed for the normalized intercept parameter (Nw). Even after separating the rainfall regimes into convective and stratiform type, a large Dm is found in NTY compared to TY precipitation. Distinct variations in Z–R, Dm–R, Nw–R, KE–R, and KE–Dm relations are noticed between TY and NTY rainfall. Possible mechanisms responsible for the RSD variations between TY and NTY are discussed using reanalysis, remote-sensing, and ground-based radar datasets.

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Section: The Rainfall Rate Relationships With D M and N Wsupporting

confidence: 86%

“…higher D m values in Pacific Ocean tropical cyclones than the Indian Ocean tropical cyclones (Janapati et al, 2020).…”

Section: Seasonal Characteristics Of Rsd Bymentioning

confidence: 76%

Section: The Rainfall Rate Relationships With D M and N Wmentioning

confidence: 96%

Section: Data Sets Usedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microphysical features of typhoon and non-typhoon rainfall observed in Taiwan, an island in the northwest Pacific

Janapati¹,

Seela²,

Lin³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

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Modification of raindrop size distribution due to seeder–feeder interactions between stratiform precipitation and shallow convection observed by X‐band polarimetric radar and optical disdrometer

Misumi

Uji

Maesaka

2021

Atmospheric Science Letters

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The seeder-feeder interactions (SFIs), where raindrops from upper clouds grow by accreting cloud droplets in the lower clouds, have been extensively studied. However, there are few studies on the modification of raindrop size distribution (DSD) through this process. In the present study, rainfall from the landfalling rainbands of a typhoon was observed using an optical disdrometer and an X-band polarimetric radar. Rainfall was classified into the following three types based on the DSD characteristics at the surface and the existence of a ρ HV minimum in the upper layer: convective rainfall accompanied by a melting layer (type SF), convective rainfall without a melting layer (type C), and stratiform rainfall with a melting layer (type S). Type SF rainfall was regarded as having undergone SFIs between stratiform precipitation and shallow convection. The DSD for SF type rainfall was characterized by more small-to medium-sized raindrops and a larger normalized intercept parameter than rainfall types C and S. An analysis using vertical profiles of radar-derived DSD parameters for type SF rainfall suggested that the median-volume diameter of raindrops increased by accreting cloud droplets in the lower clouds, and that small-to medium-sized raindrops were produced by a warm rain process and breakup of raindrops.

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Comparison of summer raindrop size distribution characteristics in the western and central Tianshan Mountains of China

Jiang

Yang

Zeng

et al. 2022

Meteorological Applications

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The microphysical processes of cloud and precipitation in the Tianshan Mountains still remain unclear due to the complex terrain and the lack of ground-based observational data. In this study, the characteristics of summer raindrop size distribution (RSD) in the western and central Tianshan Mountains of China were investigated in 2020 and 2021. According to the average raindrop spectra, the RSD characteristics exhibit significant differences that the concentration of medium and large particles is relatively higher at Zhaosu than that at Tianchi. Weak precipitation prevails in the Tianshan Mountains most of the time, yet moderate rainfall and heavy rainfall have a great impact on the accumulated rainfall amount. For each rainfall rate class, raindrops of diameter less than 0.75mm have a lower concentration and raindrops of diameter greater than 3 mm have a higher concentration at Zhaosu as compared to those at Tianchi. Compared with Tianchi, Zhaosu has a larger mass-weighted mean diameter (D m ) and a lower normalized intercept parameter (log 10 N w ).Compared with the classical convective spectrum, the RSDs at both Zhaosu and Tianchi are similar to the continental convective cluster. The relationships between the shape and slope (μ-Λ), and radar reflectivity and rainfall rate (Z-R) exhibit a significant difference in the western and central Tianshan Mountains of China.

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Raindrop Size Distribution Characteristics of Indian and Pacific Ocean Tropical Cyclones Observed at India and Taiwan Sites

Cited by 45 publications

References 61 publications

Microphysical features of typhoon and non-typhoon rainfall observed in Taiwan, an island in the northwest Pacific

Microphysical features of typhoon and non-typhoon rainfall observed in Taiwan, an island in the northwest Pacific

Modification of raindrop size distribution due to seeder–feeder interactions between stratiform precipitation and shallow convection observed by X‐band polarimetric radar and optical disdrometer

Comparison of summer raindrop size distribution characteristics in the western and central Tianshan Mountains of China

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