Deterministic and probabilistic projections and their credibility in analyzing future precipitation variations in the Yellow River Basin, China

Autor: Zhouliang Sun, Yanli Liu, Jianyun Zhang, Hua Chen, Zhangkang Shu, Tiesheng Guan, Guoqing Wang, Junliang Jin, Zhenxin Bao, Cuishan Liu
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Water and Climate Change, Vol 13, Iss 4, Pp 1806-1829 (2022)
Druh dokumentu: article
ISSN: 2040-2244
2408-9354
DOI: 10.2166/wcc.2022.359
Popis: It remains a key challenge to obtain reliable future precipitation estimates and their reliability under different climate scenarios. In this study, the deterministic projection of future precipitation in the Yellow River Basin (YRB) was obtained within the Bayesian model averaging (BMA) framework. A probability estimation method based on the BMA weighting scheme was proposed to obtain the probabilistic projection of precipitation. We also analyzed the credibility of these two projections. The results showed that four indexes projected by the BMA method showed an increasing trend with a higher probability. The probabilities of increasing with varying degrees were more than those for decreasing for all the precipitation indexes. The credibility of the precipitation estimation under specific climate scenarios was testified by the lower ED (the mean of long-term annual relative simulation deviation) and VD (the variance of long-term annual relative simulation deviation). The estimation based on the BMA model is more trustworthy than any other model. For the four precipitation indicators, the accuracy between the calculated VR (Variation range, to describe the interval of variation of the indicators) with the greatest likelihood and the actual VR was 38.31–53.74%. In 81.93–94.70% of grids, the deviations were smaller than one level. Both the deterministic and probabilistic projections have high geographic distribution and variation trend consistency. HIGHLIGHTS A probability estimation method was proposed for the probabilistic projection of future climate.; The deterministic projection and probabilistic projection of future precipitation were consistent.; The projection accuracy was positively correlated with historical occurrences of precipitation.; The probability of increase is greater than that of decrease for the future precipitation of YRB.;
Databáze: Directory of Open Access Journals
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