On quality of radar rainfall with respect to temporal and spatial resolution for application to urban areas

Jungsoo Yoon, Jingul Joo, Chulsang Yoo, Seokhwan Hwang, Sanghun Lim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study the quality of radar rainfall with respect to temporal and spatial resolution was examined. Gwangdeoksan Radar and the Korea Institute of Civil Engineering and Building Technology (KICT) Radar were used for this purpose, along with the automatic weather systems data within Seoul. In addition, several quantitative quality measures were applied to examine the resolution. A negative bias of more than 40% in the radar rainfall of Gwangdeoksan Radar occurred with changes in the temporal and spatial resolution. However, the negative bias in the radar rainfall of KICT Radar was less than 10%. The mean square error in the radar rainfall of Gwangdeoksan Radar ranged from 5.5 to 0.4 mm2 h−2 and the mean square error in the radar rainfall of KICT Radar ranged from 30.2 to 1.5 mm2 h−2. The correlation co-efficient of the accumulated time of 30 min was more than 0.7, which increased by 30% from the correlation co-efficient of the accumulated time of 10 min. The bias in the radar rainfall of Gwangdeoksan Radar was still large with changes in the temporal and spatial resolution. However, the radar rainfall of KICT Radar was quantitatively similar to the gauge rainfall, and so the radar rainfall did not need any further quantitative correction.

Original languageEnglish
Pages (from-to)19-30
Number of pages12
JournalMeteorological Applications
Volume24
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • gauge rainfall
  • quantitative quality measures
  • radar rainfall
  • spatial resolution
  • temporal resolution

ASJC Scopus subject areas

  • Atmospheric Science

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