Analysis of Spatiotemporal Variation in Precipitation on the Loess Plateau from 1961 to 2016 DOI Open Access
Jiahui Wu, Hongbing Deng,

Ran Sun

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(24), P. 11119 - 11119

Published: Dec. 18, 2024

This study utilized annual precipitation data collected from 76 meteorological stations located on the Loess Plateau and its adjacent regions. It employed empirical orthogonal function (EOF) analysis, Mann–Kendall trend test (M-K), continuous wavelet transform (CWT) to investigate spatial distribution patterns, temporal trends, periodicity of 1961 2016. The results showed following: (1) long-term averages rainfall exhibited a general decline southeast northwest, with certain areas demonstrating reduction radiating outward central region. regime was fundamentally governed by interplay between geographic coordinates topo-graphical characteristics. Nevertheless, this pattern is expected undergo changes in future. (2) Annual southern eastern parts decreased significantly, while western part reported greatest increase, thus variability will decrease (3) generally has period about 4 years. coherence analysis reveals that El Niño events, occurring over brief 4-year interval, correlate diminished patterns across sectors Plateau, consequently attenuating precipitation’s throughout entire geographical domain. Therefore, future, when occurs, it necessary prevent droughts regions Plateau.

Language: Английский

Analysis of Spatiotemporal Variation in Precipitation on the Loess Plateau from 1961 to 2016 DOI Open Access
Jiahui Wu, Hongbing Deng,

Ran Sun

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(24), P. 11119 - 11119

Published: Dec. 18, 2024

This study utilized annual precipitation data collected from 76 meteorological stations located on the Loess Plateau and its adjacent regions. It employed empirical orthogonal function (EOF) analysis, Mann–Kendall trend test (M-K), continuous wavelet transform (CWT) to investigate spatial distribution patterns, temporal trends, periodicity of 1961 2016. The results showed following: (1) long-term averages rainfall exhibited a general decline southeast northwest, with certain areas demonstrating reduction radiating outward central region. regime was fundamentally governed by interplay between geographic coordinates topo-graphical characteristics. Nevertheless, this pattern is expected undergo changes in future. (2) Annual southern eastern parts decreased significantly, while western part reported greatest increase, thus variability will decrease (3) generally has period about 4 years. coherence analysis reveals that El Niño events, occurring over brief 4-year interval, correlate diminished patterns across sectors Plateau, consequently attenuating precipitation’s throughout entire geographical domain. Therefore, future, when occurs, it necessary prevent droughts regions Plateau.

Language: Английский

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