Characteristics of Boreal Summer Compound Hot-Drought Events in the Yangtze River Valley and Relationships with Indian Ocean Sea Surface Temperature DOI Creative Commons
Yifang Zhang,

X. An,

Shanlei Sun

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Abstract Compound hot-drought events (CHDEs) have drawn widespread attention for their severe impacts on ecosystems and human livelihoods. This study investigated the characteristics driving mechanisms of boreal summer CHDEs in Yangtze River Valley (YRV) during 1961–2022. Results showed that most intense were concentrated Sichuan Province, with both affected area event severity exhibiting significant upward trends period. A strong relationship was identified between YRV sea surface temperature (SST) anomalies Indian Ocean, independent El Niño-Southern Oscillation (ENSO) influences. Cold SST cooled tropical troposphere, triggering easterly winds over East Asia subtropical regions. Concurrently, increased precipitation north-central India induced an upper-tropospheric anticyclone northwestern Tibetan Plateau. In turn, propagated Rossby waves promoted anticyclonic conditions maintained a meridional dipole circulation pattern. Anomalous high-pressure systems North Atlantic Europe-West Siberia amplified these patterns, which further altered radiation budgets, drying land enhancing sensible heat flux. The resulting land-atmosphere interaction sustained circulation, intensifying YRV. Projections under high-emission SSP5-8.5 scenario suggested frequency atmospheric patterns likely to increase, exacerbating posing heightened risks environment society.

Language: Английский

Increased frequency and severity of global compound dry and heat wave events in a daily scale DOI
Lijun Jiang, Jiahua Zhang, Linyan Bai

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132857 - 132857

Published: Feb. 1, 2025

Language: Английский

Citations

0
Characteristics of boreal summer compound hot-drought events in the Yangtze River Valley and relationships with Indian Ocean Sea surface temperature DOI
Yifang Zhang,

X. An,

Shanlei Sun

et al.

Climate Dynamics, Journal Year: 2025, Volume and Issue: 63(5)

Published: May 1, 2025

Language: Английский

Citations

0
Anthropogenic Exacerbation in Dry‐Hot Probability and Consequential Record‐Shattering Droughts in the Middle and Lower Reaches of the Yangtze River DOI
Shuyun Feng, Xihui Gu, Yansong Guan

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(20)

Published: Oct. 24, 2024

Abstract In the year 2019, middle and lower reaches of Yangtze River (MLRYR) experienced an unprecedented summer‐autumn drought (SAD) driven by dry‐hot conditions [high near‐surface air temperatures ( T ) low precipitation P )], causing substantial agricultural economic losses. However, influence anthropogenic climate change (ACC) on these their impacts SAD occurrences remains uncertain. Here, both observations simulations show that ACC‐driven increase led to greater likelihood from August November 1901–2020 in MLRYR. Using self‐calibrating Palmer index (scPDSI) assess severity, we find increasing occurrence (from 33.3% 1901–2000 85.7% 2001–2020) MLRYR associated with more frequent conditions. Under a business‐as‐usual scenario, future association is projected be stronger, exceptional +10% per century. ACC‐induced would elevate events like 2019 event 1.59% (1961–2020) 17.82% (2041–2100). Therefore, effective measures are needed adapt under warming.

Language: Английский

Citations

2
Anthropogenic Climate Change and Urbanization Exacerbate Risk of Hybrid Heat Extremes in China DOI

Sijia Luo,

Xihui Gu, Yansong Guan

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(17)

Published: Sept. 2, 2024

Abstract Dry‐ and wet‐bulb temperature ( T d w ) are usually to define heatwaves (HWs) which have been enhanced under anthropogenic climate change (ACC) urbanization. However, responses of various types HWs (i.e., dry HWs, only high ; humid hybrid both total or ), ACC urbanization remain unknown. In this study, observations simulations show significantly increasing occurrence probability over China during 1971–2020, whereas increase is mainly reflected in followed by HWs. 68.2%–93.0% the observed increases above four can be attributed ACC; on other hand, tends suppress but enhance as a result contributing 10.9%. Under future ACC, projected more frequent expected, sourced from because dry/humid steady/downward. As consequence, urban population exposure ACC‐induced would remarkably 83.55 billion person‐days 2090s, 89.5% Urbanization amplify 74.79 110.9 person‐days. Our results underscore importance improving understanding areas developing targeted adaptation planning warmer planet.

Language: Английский

Citations

1
Amplification of compound hot-dry extremes and associated population exposure over East Africa DOI
Brian Ayugi, Charles Onyutha, Kenny Thiam Choy Lim Kam Sian

et al.

Climatic Change, Journal Year: 2024, Volume and Issue: 177(9)

Published: Sept. 1, 2024

Language: Английский

Citations

0
Characteristics of Boreal Summer Compound Hot-Drought Events in the Yangtze River Valley and Relationships with Indian Ocean Sea Surface Temperature DOI Creative Commons
Yifang Zhang,

X. An,

Shanlei Sun

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Abstract Compound hot-drought events (CHDEs) have drawn widespread attention for their severe impacts on ecosystems and human livelihoods. This study investigated the characteristics driving mechanisms of boreal summer CHDEs in Yangtze River Valley (YRV) during 1961–2022. Results showed that most intense were concentrated Sichuan Province, with both affected area event severity exhibiting significant upward trends period. A strong relationship was identified between YRV sea surface temperature (SST) anomalies Indian Ocean, independent El Niño-Southern Oscillation (ENSO) influences. Cold SST cooled tropical troposphere, triggering easterly winds over East Asia subtropical regions. Concurrently, increased precipitation north-central India induced an upper-tropospheric anticyclone northwestern Tibetan Plateau. In turn, propagated Rossby waves promoted anticyclonic conditions maintained a meridional dipole circulation pattern. Anomalous high-pressure systems North Atlantic Europe-West Siberia amplified these patterns, which further altered radiation budgets, drying land enhancing sensible heat flux. The resulting land-atmosphere interaction sustained circulation, intensifying YRV. Projections under high-emission SSP5-8.5 scenario suggested frequency atmospheric patterns likely to increase, exacerbating posing heightened risks environment society.

Language: Английский

Citations

0