Vertical variation of Z-R relationship at hallasan mountain during typhoon nakri in 2014

Chulsang Yoo, Jung Mo Ku

Research output: Contribution to journalArticle

Abstract

Hallasan Mountain is located at the center of Jeju Island, Korea. Even though the height of the mountain is just 1,950 m, the orographic effect is strong enough to cause heavy rainfall. In this study, a rainfall event, due to Typhoon Nakri in 2014, observed in Jeju Island was analyzed fully using the radar and rain gauge data. First, the Z-R relationship Z=ARb was derived for every 250 m interval from the sea level to the mountain top. The resulting Z-R relationships showed that the exponent b could be assumed as constant but that the parameter A showed a significant decreasing trend up to an altitude around 1,000 m before it increased again. The orographic effect was found to be most significant at this altitude of 1,000 m. Second, the derived Z-R relationships were applied to the corresponding altitude radar reflectivity data to generate the rain rate field over Jeju Island. This rain rate field was then used to derive the areal-Average rain rate data. These data were found to be very similar to the rain gauge estimates but were significantly different from those derived from the application of the Marshall-Palmer equation to the 1.5 km CAPPI data, which is the data type that is generally used by the Korea Meteorological Administration (KMA).

Original languageEnglish
Article number1927012
JournalAdvances in Meteorology
Volume2017
DOIs
Publication statusPublished - 2017

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rain
typhoon
mountains
rain gages
Rain
Korea
mountain
radar
Rain gages
orographic effect
sea level
Radar
gauge
exponents
intervals
reflectance
Sea level
trends
rainfall
causes

ASJC Scopus subject areas

  • Geophysics
  • Pollution
  • Atmospheric Science

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Vertical variation of Z-R relationship at hallasan mountain during typhoon nakri in 2014. / Yoo, Chulsang; Ku, Jung Mo.

In: Advances in Meteorology, Vol. 2017, 1927012, 2017.

Research output: Contribution to journalArticle

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