Raindrop size distribution characteristics of indian and pacific ocean tropical cyclones observed at India and Taiwan sites

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

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We made an effort to inspect the raindrop size distribution (RSD) characteristics of Indian Ocean and Pacific Ocean tropical cyclones (TCs) using ground-based disdrometer measurements from observational sites in India and Taiwan. Five TCs (2010 – 2013) from the Indian Ocean and six TCs (2014 – 2016) from the Pacific Ocean were measured using particle size and velocity disdrometers installed in south India and south Taiwan, respective-ly. Significant differences between the RSDs of Indian Ocean and Pacific Ocean TCs are noticed. For example, a higher number of small drops is observed in Indian Ocean TCs, whereas Pacific Ocean TCs have more mid-size and large drops. RSDs of Pacific Ocean TCs have higher mass-weighted mean diameter and lower normalized intercept parameter than Indian Ocean TCs. RSD values quantified based on rainfall rate and precipitation types also showed similar characteristics between Indian Ocean and Pacific Ocean TCs. The radar reflectivity and rainfall rate (Z-R) relations and shape and slope (μ-Λ) relations of both oceanic (Indian and Pacific) TCs are found to be distinctly different. Possible causes for the dissimilarities in RSD features between Indian Ocean and Pacific Ocean TCs are due to relative differences in water vapor availability and convective activity between TCs in these two oceanic basins.

Original languageEnglish
Pages (from-to)299-317
Number of pages19
JournalJournal of the Meteorological Society of Japan
Volume98
Issue number2
DOIs
StatePublished - 2020

Keywords

  • Raindrop size distribution
  • Rainfall rate
  • Tropical cyclones

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