Acta Geodaetica et Cartographica Sinica ›› 2024, Vol. 53 ›› Issue (11): 2125-2137.doi: 10.11947/j.AGCS.2024.20230473

• Geodesy and Navigation • Previous Articles    

A four-parameter model for estimating typhoon motion states based on time difference of PWV arrival

Qimin HE1,2,3(), Kefei ZHANG4(), Li LI1, Dajun LIAN1, Wei ZHAO1, Guodong CHEN1, Erjiang FU5, Rui WANG6   

  1. 1.School of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
    2.Suzhou Key Laboratory of Spatial Information Intelligent Technology and Application, Suzhou University of Science and Technology, Suzhou 215009, China
    3.Suzhou Bohe Intelligent Information Technology Co., Ltd., Suzhou 215101, China
    4.School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
    5.Bei-Stars Geospatial Information Innovation Institute, Nanjing 211800, China
    6.School of Resources and Architectural Engineering, Gannan University of Science and Technology, Ganzhou 341001, China
  • Received:2023-10-25 Published:2024-12-13
  • Contact: Kefei ZHANG E-mail:heqimin@usts.edu.cn;profkzhang@cumt.edu.cn
  • About author:HE Qimin (1994—), male, PhD, lecturer, majors in GNSS meteorology. E-mail: heqimin@usts.edu.cn
  • Supported by:
    The National Natural Science Foundation of China(42361134583);The Basic Research Program of Jiangsu Higher Education Institutions of China(24KJB170020);The Basic Research Program of Jiangsu Province(BZ2022018);The Jiangsu Dual Creative Talents Program Projects of Jiangsu Province(JSSCRC2022281);The Natural Science Foundation of Suzhou University of Science and Technology(XK Q2021006)

Abstract:

Typhoon is a kind of disastrous weather which seriously affects human production and activities. The effective monitoring of typhoon status is of great significance to avoid and reduce the loss of people's life and property. Water vapor is the main driving force of typhoon development. In this paper, a four-parameter model (TDOPA-4) for estimating typhoon's movement based on the time difference of precipitable water vapor (PWV) arrival (TDOPA) was proposed, which requires PWV time series of several stations near the typhoon's path as inputs. The initial linear velocity, initial direction angle, linear acceleration and angular velocity of the typhoon were estimated, and then the velocity and direction angle of the typhoon at any moment can be further calculated. The typhoon Lekima and Bailu in China in 2019 were selected as cases study for verifying the model. First, the accuracy of ERA5 datasets derived PWV (ERA5-PWV) was tested by using the ground-based global navigations satellite systems derived PWV in China, which was used to estimate the typhoon's movement based on the TDOPA-4 model. Then, the spatial distribution and temporal characteristics of PWV during typhoon's period were analyzed, and the moving trend and relationship between typhoon and water vapor were studied. Finally, the typhoon products provided by the China Meteorological Administration (CMA) and People's Government of Zhejiang Province (PGZP) were as reference, and the velocity and directional angle of Lekima and Bailu estimated from the TDOPA-4 model were evaluated. The results showed that the mean Bias, RMSE and STD were 0.25, 6.39, 6.38 km/h and 4.68°, 21.59° and 20.83° compared to the results from the CMA, respectively. Compared with the results of the PGZP, the mean Bias, RMSE and STD are 2.23, 5.41 and 4.27 km/h, respectively. The above results show that the TDOPA-4 can reflect the water vapor transport of typhoons, and provide a supplementary method for monitoring typhoon activities.

Key words: typhoon monitoring, ERA5, time difference of PWV arrival, GNSS, radiosonde station

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