Analysis of spatiotemporal characteristics of precipitation at different levels in Beijing based on Mann–Kendall test and wavelet analysis

This paper employs Mann–Kendall test, wavelet analysis, and Kriging interpolation to analyze Beijing's precipitation from 1981 to 2022, using 20-station data. It reveals precipitation trends: increase 1980s–1990s, decline, and then rebound in the 2000s, especially in rainstorms. A 2008 turning...

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Bibliographic Details
Published in:Water science & technology. Water supply 2024-09, Vol.24 (9), p.3208-3225
Main Authors: Liu, Jinghui, Yuan, Xushan, Lu, Mingxing, Li, Yanmin
Format: Article
Language:English
Subjects:
Annual precipitation
Annual rainfall
Annual variations
Atmospheric precipitations
Climate change
Economic development
Floods
Hydrology
Kriging interpolation
Mountains
Periodic variations
Periodicity
Precipitation
Rain
Rainstorms
Trends
Wang Fen
Water resources management
Wavelet analysis
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Summary:This paper employs Mann–Kendall test, wavelet analysis, and Kriging interpolation to analyze Beijing's precipitation from 1981 to 2022, using 20-station data. It reveals precipitation trends: increase 1980s–1990s, decline, and then rebound in the 2000s, especially in rainstorms. A 2008 turning point marked a shift from decreasing to increasing trends. Annual variation correlates with intensity, while moderate-to-torrential rain changes are linked to days. Beijing's precipitation exhibits multi-timescale periodicity, with similar trends in annual and rainstorm precipitation. Future predictions suggest a decrease. Spatially, northeast receives more rain than southwest, mountains more days than plains/cities, and east has stronger intensity than west. Moderate rain dominates total precipitation, with occurrence declining as intensity increases. Annual precipitation positively correlates with grades but negatively with days. These insights deepen our understanding of Beijing's complex precipitation patterns.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2024.204