Impacts of Continuous Water Diversions by the South‐To‐North Water Diversion Project on Increased Precipitation and Decreased Temperature in Water‐Receiving Areas

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(7)

Published: April 7, 2025

Abstract Climate impacts of the South‐to‐North water diversion project in China on water‐receiving areas (WRA) is simulated by Weather Research and Forecasting (WRF) model. The results show that during 2015–2022 period, WRA experiences increased precipitation decreased temperature. Annual 2.8 mm, mainly dominated non‐convective (1.92 mm). Although upwind region receives more water, increase vapor flux dramatic downwind due to spring northwest monsoon; temperature effect most pronounced (over 0.15°C), over 10 mm evaporation region. sensible heat decrease less than latent increase, because insulating effect, which prevented evaporative cooling reduction. This study advances our understanding mechanisms large‐scale affects climates.

Language: Английский

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Comparison for the Characteristics and Mechanisms of Independent Daytime, Nighttime, and Compound Heatwaves Over Yangtze‐Huaihe River Basin

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(7)

Published: April 8, 2025

Abstract With the growing need to fully understand characteristics of daytime and nighttime heatwaves under global warming, an overall investigation has been conducted distinctly separating comparing independent daytime, nighttime, day‐night compound over China. The findings reveal that Yangtze‐Huaihe River basin (YHRB) suffers from most frequent heatwaves, which also exhibit a significant rise in both frequency intensity during 1961–2020. Focused on regional YHRB, are mostly related atmospheric systems at middle lower levels, including strengthened westward western North Pacific subtropical high (WNPSH) Pacific‐Japan/East Asia—Pacific (PJ/EAP) pattern, benefits sunny weather downdrafts YHRB. On other hand, influenced by synoptic higher northward cyclonic meandering East Asian jet (EASJ), eastward South (SAH), positive phase circumglobal teleconnection (CGT) pattern accompanied with cloudy downward longwave radiation north Our would help improve understanding mechanisms underlying various types better respond them.

Language: Английский

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Recent trends and variability of temperature and atmospheric water vapor over South Asia

Atmospheric Research, Journal Year: 2024, Volume and Issue: 309, P. 107556 - 107556

Published: June 28, 2024

This study examines the recent trends and variability of temperature atmospheric water vapor over South Asia during summer monsoon season from 1970 to 2022. We employ gridded reanalysis observational datasets assess in surface further investigate associated physical processes. Our results show that has increased by 0.5 °C per decade. Notably, we find a statistically significant major transition series 1995, such 1970–1994 (1995–2022) is with anomalous cooling (anomalous warming). Since not only have temporal variations regional temperature, vapor, clear-sky downward longwave radiation been synchronous at interannual scales, but their largest spatial located mainly same region. A diagnosis moisture budget reveals observed changes convergence are dominated mean circulation dynamics, while change thermodynamics relatively small. The enhancement Somali low-level jet may contribute modulating circulations.

Language: Английский

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Water Vapor Transport and its Influence on Water Stable Isotope in Dongting Lake Basin

Published: Aug. 19, 2024

Abstract. Understanding water vapor sources and transport paths is essential for assessing the cycle predicting precipitation accurately. Utilizing diagnosis calculations, this study determined leading to in Dongting Lake Basin four seasons (represented by January, April, June, October). In generating originated from Arabian Peninsula, driven southern branch of westerlies over side Tibetan Plateau, along northern Indian Peninsula through southwest China reach Basin. two emerged: one aligned closely with January path but location shifted slightly northward degree latitude, another was weak subtropical high southwestern Pacific, bringing moist air western Pacific via South Sea Indochinese Peninsula. sourced Ocean high, crossed equator transported various bodies China, finally reaching basin. October saw a crossing Sea, entering influenced East Asian monsoon system. different seasons, variations stable isotopes adhered Rayleigh fractionation balance principles. These findings highlight impact atmospheric circulation on isotopes, providing framework understanding isotope mechanisms reconstructing past conditions.

Language: Английский

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Weather pattern classification of regional extreme precipitation events and their formation mechanisms in the Yangtze-Huai Region, China

Climate Dynamics, Journal Year: 2024, Volume and Issue: 63(1)

Published: Dec. 16, 2024

Language: Английский

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