Obvious difference of dominant circulation patterns between dry‐type and humid‐type heatwaves in North China DOI Open Access
Ting Ding,

Hui Gao,

Tiejun Xie

et al.

International Journal of Climatology, Journal Year: 2024, Volume and Issue: 44(13), P. 4710 - 4724

Published: Aug. 25, 2024

Abstract Based on the observed maximum temperature ( T max ), relative humidity (RH) and NCEP/NCAR reanalysis data during 1981–2021, basic temporal features dominant atmospheric circulation patterns of dry‐type humid‐type heatwaves in North China are investigated compared. Statistical results indicate dry occur mainly early summer (from June to July), that is, before rainy season China, while humid have a high frequency mid‐July mid‐August. During research period, increasing trend is 0.67 days·decade −1 , increase at greatly higher rate 1.85 . For heatwave, ridge subtropical westerlies plays main role, northerly wind east reduces air moisture convergence over region. However, for westward northward propagations western Pacific (WPSH) may make major contribution, southerly anomalies west WPSH enlarge water vapour The adiabatic heating subsiding all levels horizontal advection lower troposphere stronger than heatwaves, which cause former type. These highlight diversity suggests multiple local large‐scale subseasonal circulations should be considered improve seasonal forecast skills heat extremes.

Language: Английский

2023: Weather and Climate Extremes Hitting the Globe with Emerging Features DOI Creative Commons
Wenxia Zhang, Robin Clark, Tianjun Zhou

et al.

Advances in Atmospheric Sciences, Journal Year: 2024, Volume and Issue: 41(6), P. 1001 - 1016

Published: April 17, 2024

Globally, 2023 was the warmest observed year on record since at least 1850 and, according to proxy evidence, possibly of past 100 000 years. As in recent years, warmth has again been accompanied with yet more extreme weather and climate events throughout world. Here, we provide an overview those 2023, details key background causes help build upon our understanding roles internal variability anthropogenic change. We also highlight emerging features associated some these events. Hot extremes are occurring earlier year, increasingly simultaneously differing parts world (e.g., concurrent hot Northern Hemisphere July 2023). Intense cyclones exacerbating precipitation North China flooding Libya September). Droughts regions California Horn Africa) have transitioned into flood conditions. Climate show increasing interactions ecosystems via wildfires Hawaii August Canada from spring autumn 2023) sandstorms Mongolia April Finally, consider challenges research that characteristics present for strategy practice adaptation.

Language: Английский

Citations

22
Pitfalls in diagnosing temperature extremes DOI Creative Commons
Lukas Brunner, Aiko Voigt

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 18, 2024

Abstract Worsening temperature extremes are among the most severe impacts of human-induced climate change. These often defined as rare events that exceed a specific percentile threshold within distribution daily maximum temperature. The percentile-based approach is chosen to follow regional and seasonal variations so can occur globally in all seasons, frequently uses running window increase sample size for calculation. Here, we show windows used many studies recent years introduce time-, region-, dataset-depended bias lead striking underestimation expected extreme frequency. We reveal this arises from artificially mixing mean cycle into propose simple solution essentially eliminates it. then use corrected frequency reference also leads an overestimation future heatwave changes by much 30% some regions. Based on these results stress should not be without correction estimating their impacts.

Language: Английский

Citations

21
Projection of future precipitation, air temperature, and solar radiation changes in southeastern China DOI

Kinde Negessa Disasa,

Haofang Yan,

Guoqing Wang

et al.

Theoretical and Applied Climatology, Journal Year: 2024, Volume and Issue: 155(6), P. 4481 - 4506

Published: March 1, 2024

Language: Английский

Citations

8
Dynamics of the risk of algal blooms induced by surface water temperature in an alpine eutrophic lake under climate warming: Insights from Lake Dianchi DOI
Jiabin Peng, Junxu Chen, Shiyin Liu

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 643, P. 131949 - 131949

Published: Aug. 31, 2024

Language: Английский

Citations

3
Unprecedented September Heatwave in the Yangtze River Basin in 2024 and the Great Exposure Risk to School Students DOI Creative Commons
Tiejun Xie, Ting Ding,

Hui Gao

et al.

Atmospheric Science Letters, Journal Year: 2025, Volume and Issue: 26(4)

Published: April 1, 2025

ABSTRACT In September 2024, the Yangtze River basin experienced a supremely extreme heatwave that broke historical records from at least 1961 and could have severe impact on outdoor health of school children. This paper provides timely analysis characteristics in its exposure to population aged 14 years below, causes led occurrence, as well future projections. regional average days reached 7.57 days, daily maximum temperature ( T max ) 31.53°C, both which are much higher than climatology exceed records. resulted high under, with provinces Sichuan, Chongqing, Hunan, Jiangxi exposed more 100 million person‐days. The expansion South Asian High (SAH) Western Pacific Subtropical (WPSH) may directly contributed this heatwave. CMIP6 projections show frequency heatwaves similar 2024 will increase future.

Language: Английский

Citations

0
Different characteristics of independent and compound extreme heat and ozone pollution events in the Greater Bay Area of China DOI Creative Commons
Ziwei Huang, Ming Luo, Meng Gao

et al.

International Journal of Applied Earth Observation and Geoinformation, Journal Year: 2023, Volume and Issue: 124, P. 103508 - 103508

Published: Oct. 2, 2023

Under global warming and rapid urbanization, heat extremes, ozone pollution, their co-occurrences are emerging posing severe risks to human health. However, possibly different characteristics of independent days (IHD), pollution (IOP) compound heat-ozone (CHOP) events unclear. In this study, we present an investigation the spatial distribution mechanisms associated with IHD, IOP CHOP during May–October in 2014–2022 by taking Guangdong-Hong Kong-Macao Greater Bay Area (GBA) China as example. The results show that central GBA faces higher risk than northwestern southeastern regions. IHD primarily driven extremely high temperatures accompanied anomalous anticyclone pressure at both lower upper troposphere levels, under joint effects South Asian western North Pacific subtropical high. predominantly decreased cloud cover, air humidity enhanced downward solar radiation. influenced increases temperature circulation patterns somewhat similar but much stronger magnitude faster developing process, likely related tropical cyclone activities. Our findings can strengthen early forecasting these extreme mitigate negative impacts.

Language: Английский

Citations

7
China's Yangtze River basin is becoming the super heatwave centre in the East Asian monsoon regions DOI
Wei Jiang, Ting Ding,

Hui Gao

et al.

International Journal of Climatology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 13, 2024

Abstract Different from the general heatwaves that mainly occur in southeastern China, super China are concentrated mostly mid–lower reaches of Yangtze River basin. Daily maximum temperature data over land CPC/NOAA revealed basin has become centre with highest frequency increase East Asian monsoon regions 21st century. Further analyses also indicted extent a much higher increasing rate than by using running thresholds. The westward extension western Pacific subtropical high (WPSH) plays most dominant role. Statistical results suggested 10‐gpm increment geopotential height (GPH) leads to 0.43°C regionally averaged temperature. Additionally, spatial heatwave may expand approximately 4%. In contrast stable eastern boundary North Africa high, WPSH significantly expanded This expansion led enhancement GPH basin, resulting due heat‐dome effect. Projections 29 Coupled Model Intercomparison Project Phase 6 (CMIP6) models under moderate greenhouse gas emission scenario (SSP2‐4.5) suggest will continue strengthen throughout implies be Asia region.

Language: Английский

Citations

2
Heatwave magnitude quantization and impact factors analysis over the Tibetan Plateau DOI Creative Commons
Xiuguo Liu, Tongchang Zhang, Gang Deng

et al.

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

Published: Aug. 23, 2024

Abstract More frequent and intense heatwave events (HWEs) on the Tibetan Plateau (TP) present substantial threats to ecological hydrological systems. However, understanding changes in HWEs is limited, primarily from analyses at individual stations or single elements (glaciers, lakes). Here, using refined data, we quantify magnitude by aggregating multiple indicators into a comprehensive index explore influence of environmental factors over TP. Our findings indicate that has significantly increased since 21st century, especially autumn. From 1979-2000 2000-2022, hotspots migrated toward northwestern TP, whereas regions with most rapid increase shifted opposite direction. During inter-seasonal, spring winter, migration direction changed northwest first 22 years (1979-2000) southeast recent (2001-2022). We also find downwardshortwave radiation plays significant role spatial heterogeneity magnitude, influenced elevation land cover. The elevation-dependence become more pronounced years, high migrating higher elevations. Furthermore, water bodies during this period, which may impact utilization resources. study are essential for mitigating disaster effects HWEs.

Language: Английский

Citations

0
Obvious difference of dominant circulation patterns between dry‐type and humid‐type heatwaves in North China DOI Open Access
Ting Ding,

Hui Gao,

Tiejun Xie

et al.

International Journal of Climatology, Journal Year: 2024, Volume and Issue: 44(13), P. 4710 - 4724

Published: Aug. 25, 2024

Abstract Based on the observed maximum temperature ( T max ), relative humidity (RH) and NCEP/NCAR reanalysis data during 1981–2021, basic temporal features dominant atmospheric circulation patterns of dry‐type humid‐type heatwaves in North China are investigated compared. Statistical results indicate dry occur mainly early summer (from June to July), that is, before rainy season China, while humid have a high frequency mid‐July mid‐August. During research period, increasing trend is 0.67 days·decade −1 , increase at greatly higher rate 1.85 . For heatwave, ridge subtropical westerlies plays main role, northerly wind east reduces air moisture convergence over region. However, for westward northward propagations western Pacific (WPSH) may make major contribution, southerly anomalies west WPSH enlarge water vapour The adiabatic heating subsiding all levels horizontal advection lower troposphere stronger than heatwaves, which cause former type. These highlight diversity suggests multiple local large‐scale subseasonal circulations should be considered improve seasonal forecast skills heat extremes.

Language: Английский

Citations

0