Plateau Meteorology

Plateau Meteorology >

2015 , Vol. 34 >Issue 3: 832 - 841

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.0036

Characteristics of Lightning Activity and Radar Reflectivity during Typhoon ‘Morakot’ Landfall

  • WEN Ying ,
  • ZHAO Yang ,
  • ZHAO Guo ,
  • KONG Xiangzhen
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  • Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environment Research Institute, Chinese Academy of Science, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Pingliang Land Surface Process & Severe Weather Research Station, Chinese Academy of Sciences, Pinliang 744000, China

Received date: 2014-12-29

  Online published: 2015-06-28

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Abstract

Using the lightning data from World Wide Lightning Location Network (WWLLN), typhoon track and intensity data from the Best Track Data Sets (CMA), radar reflectivity of the weather radar from Fujian Meteorological Administration and the NCEP/NCAR Global Reanalysis Data, to analyze the characteristics of lightning activity and radar reflectivity in typhoon ‘Morakot’ (0908) during the two processes of landfall in Taiwan and Fujian. The analysis showed that more lightning occurred in the outer rainband and less lightning occurred in the central area and inner rainband. The first landfall in Taiwan caused more lightning than the second landfall in Fujian. At 6 km height, lightning was prone to occur in the rear or round of the central area where the reflectivity value was high and the area was large. The lightning number was low at the beginning of echo formation, and increased when the convective systems developed stably. During the period of typhoon entered into Taiwan Strait and made landfall in Fujian, the maximum echo height and lightning number had a positive correlation.The lightning activity was affected by both the vertical movement and topography. Lightning concentrated on the land at the rear side area of cyclonic horizontal wind flowed into the vertical upflow central areas on 500 hPa. The position and intensity of the vertical upflow central areas influenced the position and number of lightning activity.

Key words： Typhoon ‘Morakot’; Lightning; Radar reflectivity; Vertical upflow

Cite this article

WEN Ying , ZHAO Yang , ZHAO Guo , KONG Xiangzhen . Characteristics of Lightning Activity and Radar Reflectivity during Typhoon ‘Morakot’ Landfall[J]. Plateau Meteorology, 2015 , 34(3) : 832 -841 . DOI: 10.7522/j.issn.1000-0534.2015.0036

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