Research on the evolution characteristics of future climate change in West Liao River Basin

Hong-yan, Zhao; Wang, Zhichun; Li, Xiufen; Chen, Zheng; Zhao, Chunliang; Zhao, Fang

doi:10.1007/s11356-021-15640-5

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…Zhang Kexin et al [8] used the Mann-Kendall method to analyze the seasonal variation characteristics of extreme temperature events in the Yellow River Basin. Zhao Huiying et al [9] used a variety of mutation test methods to diagnose the nonstationary climate time sequence of the West Liao River Basin. Jiang and Xiong [10] used the generalized additive models for location, scale, and shape (GAMLSS) to simulate the minimum monthly flow sequence of the Yichang station, proved its nonstationarity, and showed the non-linear trend of its statistical characteristics.…”

Section: Introductionmentioning

confidence: 99%

Study of Nonstationary Flood Frequency Analysis in Songhua River Basin

Wang,

Liu,

Xing

et al. 2023

Water

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This study aimed to determine the influence of time and precipitation as covariates on the flood frequency distribution in the Songhua River tributaries under the nonstationarity assumption and to investigate the possibility of nonstationary models’ application in river management scope demarcation work. Nonstationary flood frequency analysis (NS-FFA) was conducted in three typical basins of the Songhua River (in Northeastern China) based on the generalized additive models for location, scale, and shape (GAMLSS), and stationary flood frequency analysis was used as a comparison. Under the stationarity assumption, the Pearson type Ⅲ (P-Ⅲ) distribution is the main theoretical distribution for the flood extremum at hydrological stations, followed by a lognormal (LN) distribution. Under the nonstationarity assumption, when time is considered a covariate, the optimal theoretical distribution of the flood extremum is mainly LN (with 63.75%), followed by the Weibull distribution (with 18.75%). When precipitation is considered as a covariate, the optimal theoretical distribution of the flood extremum is mainly LN (with 57.5%). We attempted to apply several FFA methods to calculate the design frequency in this study, referring to the work requirements for river management scope demarcation in three typical basins, and came to the following conclusions. From the simulation results of the p = 10% flood at the export stations of typical basins, it can be seen that time-covariate NS-FFA obtained the best simulation results. Two cases of the simulation under the stationarity assumption are positive, which will lead to a high design scale. The time-covariate GAMLSS in NS-FFA has the advantages of higher calculation accuracy and simpler processes. To better balance construction costs and disaster protection requirements, NS-FFA can be used to determine the design scale of water conservation projects; additionally, it can be used to demarcate the scope of river management. The accuracy of GAMLSS for FFA is also influenced by the complexity of the terrain, with basins with relatively simple terrain having higher calculation accuracy.

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Section: Introductionmentioning

confidence: 99%

Study of Nonstationary Flood Frequency Analysis in Songhua River Basin

Wang,

Liu,

Xing

et al. 2023

Water

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“…Sheep are innately fearful of damp heat, which makes them vulnerable to heat stress. According to the report by the Intergovernmental Panel on Climate Change [1], global warming has increased the frequency and intensity of extreme high-temperature events, exacerbating heat stress in sheep. Furthermore, the practice of intensive high-density feeding of sheep in China has made them more susceptible to heat stress (HS).…”

Section: Introductionmentioning

confidence: 99%

Molecular Mechanism of m6A Methylation Modification Genes METTL3 and FTO in Regulating Heat Stress in Sheep

Chen

Yuan

Guo

et al. 2023

IJMS

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Heat stress is an important environmental factor affecting livestock production worldwide. Primary hepatocytes and preadipocytes derived from Hu sheep were used to establish a heat stress model. Quantitative reverse transcriptase-PCR (qRT-PCR) analysis showed that heat induction significantly increased the expression levels of heat stress protein (HSP) genes and the N6-methyladenosine (m6A) methylation modification genes: methyltransferase-like protein 3 (METTL3), methyltransferase-like protein 14 (METTL14), and fat mass and obesity associated protein (FTO). Heat stress simultaneously promoted cell apoptosis. Transcriptome sequencing identified 3980 upregulated genes and 2420 downregulated genes related to heat stress. A pathway enrichment analysis of these genes revealed significant enrichment in fatty acid biosynthesis, degradation, and the PI3K-Akt and peroxisome proliferator-activated receptor (PPAR) signaling pathways. Overexpression of METTL3 in primary hepatocytes led to significant downregulation of HSP60, HSP70, and HSP110, and significantly increased mRNA m6A methylation; FTO interference generated the opposite results. Primary adipocytes showed similar results. Transcriptome analysis of cells under METTL3 (or FTO) inference and overexpression revealed differentially expressed genes enriched in the mitogen-activated protein kinase (MAPK) signaling pathways, as well as the PI3K-Akt and Ras signaling pathways. We speculate that METTL3 may increase the level of m6A methylation to inhibit fat deposition and/or inhibit the expression of HSP genes to enhance the body’s resistance to heat stress, while the FTO gene generated the opposite molecular mechanism. This study provides a scientific basis and theoretical support for sheep feeding and management practices during heat stress.

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How will ecosystem carbon sequestration contribute to the reduction of regional carbon emissions in the future? analysis based on the MOP-PLUS model framework

Yang,

Wang,

et al. 2023

Ecological Indicators

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Research on the evolution characteristics of future climate change in West Liao River Basin

Cited by 6 publications

References 21 publications

Study of Nonstationary Flood Frequency Analysis in Songhua River Basin

Study of Nonstationary Flood Frequency Analysis in Songhua River Basin

Molecular Mechanism of m6A Methylation Modification Genes METTL3 and FTO in Regulating Heat Stress in Sheep

How will ecosystem carbon sequestration contribute to the reduction of regional carbon emissions in the future? analysis based on the MOP-PLUS model framework

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