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Arid Land Geography >

2024 , Vol. 47 >Issue 9: 1482 - 1495

DOI: https://doi.org/10.12118/j.issn.1000-6060.2023.597

Climatology and Hydrology

Extreme climate characteristics in the Wuding River Basin based on WRF model

  • ZHANG Shunwei ,
  • ZHOU Zixiang ,
  • XIONG Xuanchen ,
  • ZHOU Jie
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  • College of Surveying and Mapping Science and Technology, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China

Received date: 2023-10-24

  Revised date: 2023-12-31

  Online published: 2024-09-24

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Abstract

There are still many uncertainties to be solved about extreme climate events in the semi-arid region of the Loess Plateau under climate change. In this study, the weather research and forecasting (WRF) model driven by the static geographical data and the final operational global analysis (FNL) global reanalysis data was used to simulate the climate of the Wuding River Basin of Shaanxi Province, China from 2011 to 2022, and the simulated results were verified using the observed data from four meteorological stations in the basin to analyze the applicability of the model. On this basis, 11 extreme weather indicators were selected, combined with Sen’s slope estimator and the Mann-Kendall (M-K) test to analyze the spatial distribution characteristics and spatiotemporal trend changes of extreme precipitation and extreme temperature at the annual and seasonal scales in the Wuding River Basin. The conclusions are as follows: (1) Extreme precipitation events in the basin are more frequent in the east than in the west, and the interannual and seasonal spatial distribution characteristics of the maximum daily precipitation (RX1day) and precipitation total (PRCPTOT) are high in the east and low in the west. (2) Extreme precipitation events in the basin will further increase, precipitation amount and intensity will further increase, but the duration of precipitation and the degree of drought will decrease, specifically reflected in increased precipitation in all seasons but decreased precipitation in autumn in the east. (3) Extreme temperature events in the basin are more frequent in the east than in the west, and the interannual and seasonal spatial distribution characteristics of the minimum temperature (TNn) and maximum temperature (TXx) are high in the east and low in the west. (4) Extreme temperature events in the basin will further increase, and the frequency of high and low temperatures and their intensity show opposite changes in the east and west directions, specifically manifested as decreased temperature in summer and increased temperature in spring.

Key words： WRF; extreme precipitation; extreme temperature; spatiotemporal variation characteristics; Wuding River Basin

Cite this article

ZHANG Shunwei , ZHOU Zixiang , XIONG Xuanchen , ZHOU Jie . Extreme climate characteristics in the Wuding River Basin based on WRF model[J]. Arid Land Geography, 2024 , 47(9) : 1482 -1495 . DOI: 10.12118/j.issn.1000-6060.2023.597

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