主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2020, Vol. 36 ›› Issue (1): 74-81.doi: 10.3969/j.issn.1673-503X.2020.01.010

• Articles • Previous Articles     Next Articles

Numerical simulation analysis on the potential and index of artificial precipitation enhancement in spring in Jilin province

Bo SHANG1(),Miao CAI2,Ye HUO1,Yu-quan ZHOU2   

  1. 1. Changchun Meteorological Service, Changchun 130051, China
    2. Chinese Academy of Meteorological Science, Beijing 100081, China
  • Received:2019-03-05 Online:2020-02-28 Published:2019-12-12

Abstract:

By using the mesoscale numerical model WRF 3.3.1 applied in operational forecasting system in Jilin province, the potential of artificial precipitation enhancement (APE) of a spring rainfall process on April 12, 2016, was analyzed.Specific humidity, updraft, index K, E-Ei and integral cloud water related to APE potential were chosen as comprehensive index identifying the APE potential area.The results indicated that 850 hPa specific humidity (SH850) and index K are relevant to the precipitation in spring in Jilin province.No precipitation occurs when SH850 is less than 2.9 g·kg-1, while precipitation more than 2 mm mostly corresponds to SH850 more than 4.5 g·kg-1 and index K more than 22℃.In addition, SH850 larger than 4.5 g·kg-1, index K larger than 22℃, integral cloud water larger than 0.2 mm, E-Ei larger than 0 and vertical velocity of lower layers larger than 0.4 m·s-1 were determined as the index of strong APE potential area.Then, the other spring precipitation events are used to test the grade recognition index, implying that the index is able to represent the dynamic, thermal and microphysical conditions of cloud and is available in identifying the potential area of APE in Jilin province.

Key words: Potential of artificial precipitation enhancement, Specific humidity, Ice supersaturation E-Ei, Index of artificial precipitation enhancement

CLC Number: