A study on the vertical structure and microphysical characteristic of convective cloud and precipitation over Tibetan Plateau by using Ka-band cloud radar
Author:
Affiliation:

1.Chengdu Meteorological Bureau, Chengdu 610071, China;2.Plateau Atmosphere and Enviroment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China

Clc Number:

P407.2

Fund Project:

National Natural Science Foundation of China 41705008 41605022;National Key Research and Development Project of China 2018YFC1505702;Scientific Research Foundation of Chengdu University of Information Technology KYTZ201728Supported by National Natural Science Foundation of China (41705008,41605022),National Key Research and Development Project of China(2018YFC1505702),and Scientific Research Foundation of Chengdu University of Information Technology(KYTZ201728)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    In this paper, methods of data processing and quality control were put forward according to the power spectral and raindrop spectrograph data from the Ka-band millimeter-wave cloud radar in the third Tibetan Plateau Experiment of Atmospheric Sciences Project. The usual physical quantum and the unusual quantum in domestic were also calculated, such as the spectral skewness, spectral kurtosis, average falling terminal velocity of particles and atmospheric vertical velocity. These physical quantities were used to analyze vertical structures and microphysics process of the convective cloud-precipitation over the Tibetan Plateau (Naqu) on 16 July 2015. The results are as follows: (1) The falling graupel convective clouds of the Tibetan Plateau were the strongest from 16:00 to 17:00 Beijing Time (BT) with similar structures as the hail clouds in low altitude. (2) In the same convective cloud, when it was graupel, the spectral skewness varied from “positive-negative- positive-negative” to negative; spectral kurtosis varied from negative to zero; particles in the clouds were tended to be round. (3) When the speed of updraft was greater than or equal to 6 m/s in supercooled water layer(-17~-7℃), the graupel particles , which were formed into ice crystal accretion with supercooled water drops and rimming growth, were larger than that less than or equal to 4 m/s, in the convective clouds. (4) In the convective clouds, ice crystal and graupel melt in the up-side region 300 m above 0℃ level.

    Reference
    Related
    Cited by
Get Citation

ZHANG Tao, ZHENG Jia-Feng, LIU Yan-Xia. A study on the vertical structure and microphysical characteristic of convective cloud and precipitation over Tibetan Plateau by using Ka-band cloud radar[J]. Journal of Infrared and Millimeter Waves,2019,38(6):777~790

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:March 12,2019
  • Revised:November 15,2019
  • Adopted:August 15,2019
  • Online: December 17,2019
  • Published: