The extreme climate event change trend forecast in the Huaihe River Basin, China DOI Creative Commons
Ke Zhou

Journal of Water and Climate Change, Journal Year: 2024, Volume and Issue: 16(1), P. 160 - 173

Published: Dec. 10, 2024

ABSTRACT First, this paper studied the selection of indices for extreme climate event evaluation. Then, estimation value distribution rainfall events in different recurrence periods was studied. A reversible jump Markov chain Monte Carlo method based on a generalized proposed. For data series analysis scenarios, equal weight set average adopted. Finally, three models, spatio-temporal variation characteristics Huaihe River Basin under scenarios (RCP 2.6, RCP 4.5, and 8.5) were forecasted. The spatial daily maximum minimum temperatures shows consistent trend, increasing from upper reaches to middle lower River. Extreme revealed that 1-day 5-day amounts greater than those historical Basin. annual precipitation weak trend. It can be shown study results by late 21st century, change future impact will increase greatly.

Language: Английский

Temperature and Precipitation Extremes in the Brazilian Legal Amazon: A Summary of Climatological Patterns and Detected Trends DOI Creative Commons
Wanderson Luiz‐Silva, Anna Carolina Bazzanela, Claudine Pereira Dereczynski

et al.

Atmosphere, Journal Year: 2025, Volume and Issue: 16(2), P. 222 - 222

Published: Feb. 16, 2025

The continuous understanding of extreme weather events in the Amazon is fundamental due to importance this biome for regional and planetary climate system. Climate characterization identification changes current can be key findings adaptation mitigation measures. This study examined climatology trends 20 indices associated with air temperature precipitation Brazilian Legal (BLA). Daily observed data, interpolated at grid points, were analyzed from 1961 2020. Statistical tests employed determine trend’s significance magnitude. results indicate that prolonged heat, hot days, annual records have become increasingly frequent practically all BLA over last decades. Warm days nights are increasing approximately +11 days/decade. Heat waves gone 10 consecutive on average 1960s around 30–40 recent years. Indices intensity frequency show a reduction, especially rainiest portion BLA, western sector. In east/south region where dry reach 100 days/year, they continue increase rate +1.5 days/decade, fact related delay beginning rainy season. These aspects deserve attention since impact local circulation, reducing convergence humidity not only but also central-southern Brazil.

Language: Английский

Citations

0
Variations in Air Pollutant Concentrations on Dry and Wet Days with Varying Precipitation Intensity DOI Creative Commons
Veli Yavuz

Atmosphere, Journal Year: 2024, Volume and Issue: 15(8), P. 896 - 896

Published: July 26, 2024

In this study, concentrations of three different air pollutants (PM10, SO2, and NO2) were obtained from four quality monitoring stations (AQMSs) over an 11-year period 2013 to 2023. Meteorological variables (temperature, dew point temperature, wind speed, sea level pressure, precipitation) then the nearest European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis v5 (ERA5) grid each station, their relationships analyzed. Homogeneity normality tests conducted pollutant meteorological variables, followed by data preprocessing analyses using non-parametric tests. The ultimate aim study is determine effects presence intensity precipitation on concentrations. Analyses based categories (light, moderate, heavy, severe) indicated that increasing associated with decreasing Specifically, higher intensities a reduction in levels, reductions ranging 15% 35% compared dry conditions. This effect was particularly pronounced during winter season, when PM10 decreased up 45% wet days days. finding highlighted importance not only but also type hydrometeor pollution. significant decrease observed thought be due snowfall, which believed have greater removal pollution rain.

Language: Английский

Citations

2
Brazil’s Daily Precipitation Concentration Index (CI) Using Alternative Fitting Equation and Ensemble Data DOI Creative Commons
Gerardo Núñez‐González

Hydrology, Journal Year: 2024, Volume and Issue: 11(12), P. 214 - 214

Published: Dec. 10, 2024

In recent years, precipitation concentration indices have become popular, and the daily index has been widely used worldwide. This is based on Lorenz curve fitting. Recently, some biases in fitting process observed research. Therefore, this research’s objective consisted of testing performance one alternative equation for through analysis Brazil. Daily data from 735 time series were to fit calculate index. goodness was evaluated determine which better describes empirical data. Results show that mean value Equation (1) 0.650 ± 0.079, while (2) 0.624 0.070. The results a with compared as indicated by R2, RSS, RMSE values, R2 = 0.9959 versus 0.9996 (2), RSS 252.78 22.66, 1.5092 0.0501. Thus, can be considered an improve calculation

Language: Английский

Citations

1
Nocturnal Extreme Rainfall over the Central Yungui Plateau under Cold and Warm Upper-Level Anomaly Backgrounds during Warm Seasons in 1980–2020 DOI Creative Commons
Weihua Yuan, Zhi Li

Atmosphere, Journal Year: 2024, Volume and Issue: 15(9), P. 1057 - 1057

Published: Sept. 1, 2024

The spatiotemporal and cloud features of the extreme rainfall under warm cold upper-level anomalies over central Yungui Plateau (YGP) were investigated using hourly rain gauge records, ERA5 reanalysis data, TRMM, Fengyun satellite aiming to refine understanding different types rainfall. Extreme an negative temperature anomaly (cold events) presents stronger convective when compared with positive (warm events). maximum intensity duration in events is much larger than that events, while brightness top lower, ratio higher. In middle-to-upper troposphere dominated by a anomaly, unstable configuration upper (lower) (warm) observed around YGP. Although positive, anomalous divergence convergence southerly northerly winds, as well strong moisture center upward motions, are also found YGP events. atmospheric instability higher energy circulation closely associated results indicate tropospheric has significant influences on rainfall, thus more attention should be paid future analyses.

Language: Английский

Citations

0
Statistical analysis of thundersnow events and ERA5-based convective environments across Türkiye DOI
Veli Yavuz,

Elif Lal Soysal,

Yiğitalp Kara

et al.

Natural Hazards, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 26, 2024

Language: Английский

Citations

0
The extreme climate event change trend forecast in the Huaihe River Basin, China DOI Creative Commons
Ke Zhou

Journal of Water and Climate Change, Journal Year: 2024, Volume and Issue: 16(1), P. 160 - 173

Published: Dec. 10, 2024

ABSTRACT First, this paper studied the selection of indices for extreme climate event evaluation. Then, estimation value distribution rainfall events in different recurrence periods was studied. A reversible jump Markov chain Monte Carlo method based on a generalized proposed. For data series analysis scenarios, equal weight set average adopted. Finally, three models, spatio-temporal variation characteristics Huaihe River Basin under scenarios (RCP 2.6, RCP 4.5, and 8.5) were forecasted. The spatial daily maximum minimum temperatures shows consistent trend, increasing from upper reaches to middle lower River. Extreme revealed that 1-day 5-day amounts greater than those historical Basin. annual precipitation weak trend. It can be shown study results by late 21st century, change future impact will increase greatly.

Language: Английский

Citations

0