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A review of recent studies on extreme heat in China

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Atmospheric and Oceanic Science Letters 2016年第2期9卷 114-121页

作者： LU Ri-Yu CHEN Rui-Dan State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences Center for Monsoon and Environment Research & School of Atmospheric Sciences Sun Yat-sen University

This paper reviews recent studies on extreme high temperatures in China during summer. The focus is on the variation in extreme heat and tropical nights（i.e. high temperature at night）, and the factors of influence.... 详细信息

关键词： extreme heat tropical nights variation circulation

Influences of tropical circulation and sea surface temperature anomalies on extreme heat over Northeast Asia in the midsummer of 2018

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Atmospheric and Oceanic Science Letters 2019年第4期12卷 238-245页

作者： CHEN Ruidan WEN Zhiping LU Riyu Center for Monsoon and Environment Research/Guangdong Province Key Labor atory for Climate Change and Natural Disaster Studies/School of Atmospheric Sciences Sun Yat-sen UniversityGuangzhouChina Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences Fudan UniversityChina State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of the Chinese Academy of SciencesBeijingChinaeJiangsu Collaborative Innovation Center for Climate ChangeNanjingChina

A destructive extreme heat attacked Northeast Asia(NEA)in the midsummer of 2018,characterized by the average midsummer Tmax(daily maximum air temperature at 2 m)ranking first during the study *** current study indicates that the cyclonic anomaly over the western North Pacific(WNP)was an important cause,which presents an anomaly of two standard *** cyclonic anomaly over the WNP was accompanied by anomalous convection,which favored descending and anticyclonic anomalies over NEA through a local meridional *** anticyclonic anomaly over NEA corresponds to the northwestward extension of the WNP subtropical high and facilitated the occurrence of extreme *** tropical sea surface temperature anomaly(SSTA)presents a La Ni?a decaying episode,but the SSTA over the tropical Pacific and North Indian Ocean was weak in the *** contrast,the southeastern tropical Indian Ocean(SETIO)was obviously cool,which was the coolest after *** SETIO cooling triggered a low-level southeasterly anomaly,which turned into a southwesterly after crossing the equator,due to the Coriolis *** southwesterly anomaly extended eastwards and favored the cyclonic anomaly over the ***,the circulation anomalies over the SETIO and WNP were connected via a local meridional cell,with the ascending branch over the ***,the above mechanism also operates for the climate statistics,verifying the robust in?uence of the SETIO *** the consistency of the SETIO SSTA,it could be a potential predictor for the climate over the WNP and NEA.

关键词： extreme heat Northeast Asia tropical circulation southeastern tropical Indian Ocean

An interdecadal decrease in extreme heat days in August over Northeast China around the early 1990s

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Atmospheric and Oceanic Science Letters 2021年第1期14卷 1-6页

作者： Wenjun Liu Ruidan Chen Zhiping Wen Center for Monsoon and Environment Research Guangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesSchool of Atmospheric SciencesSun Yat-sen UniversityGuangzhouChina Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghaiChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) China Jiangsu Collaborative Innovation Center for Climate Change NanjingChina

Northeast China(NEC)witnessed an interdecadal increase in summer extreme heat days(EHDs)around the *** current study reveals that this interdecadal increase only occurs in June and July,while August features a unique interdecadal decrease in EHDs around the early *** reasons for the interdecadal decrease in EHDs in August are further *** show that the interdecadal decrease in EHDs in August is due to the deceased variability of daily maximum temperature(Tmax).Overall,the variation of the Tmax over NEC in August is modulated by the Eurasian teleconnection pattern,Silk Road pattern,and East AsiaPacific ***,the influence of the Silk Road pattern dramatically weakens after the early 1990s because the meridional wind variability along the westerly jet significantly *** weakened influence of the Silk Road pattern contributes to the decreased Tmax variability over ***,the convection over the western North Pacific,which accompanies the East Asia-Pacific pattern,presents a significant decrease in variance after the early 1990s,further decreasing the Tmax variability over NEC.

关键词： Northeast China extreme heat Interdecadal Variability

Linkage of the Decadal Variability of extreme Summer heat in North China with the IPOD since 1981

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Advances in Atmospheric Sciences 2023年第9期40卷 1617-1631页

作者： Tiejun XIE Ji WANG Taichen FENG Ting DING Liang ZHAO Beijing Municipal Climate Center Beijing Meteorological BureauBeijing 100089China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 528478China National Climate Center China Meteorological AdministrationBeijing 100081China State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

extreme summer heat can have serious socioeconomic impacts in North ***,we explore the decadal variability of the number of extreme heat days in early-to-mid summer(June and July)and a related potential mechanism consistent with the major seasonal occurrence period of extreme heat events in North China(NCSH).Observational analyses show significant decadal variability in NCSH for 1981–2021,potentially linked to the Indo-Pacific warm pool and Northwest Pacific Ocean dipole(IPOD)in early-to-mid *** diagnostic analysis and the linear baroclinic model(LBM)show that the positive IPOD in early-to-mid summer can excite upward vertical wind anomalies in the South China-East China Sea region,shifting the position of the western Pacific subtropical high(WPSH)to the east or weakening the degree of its control of the South China-East China Sea region,thus generating a positive geopotential height quadrupole(EAWPQ)pattern in the East Asia-Northwest Pacific ***,the EAWPQ can cause air compression(expansion)over North China by regulating the tropospheric thickness anomalies in North China,thus increasing(decreasing)***,an empirical model that incorporates the linear trend can better simulate the decadal NCSH compared to an empirical model based solely on the IPOD index,suggesting that the decadal variability of NCSH may be a combined contribution of the decadal IPOD and external linear forcing.

关键词： extreme heat early-mid summer North China Indo-Pacific warm pool and Northwest Pacific Ocean dipole(IPOD) decadal variability

Gastrointestinal manifestations of critical ill heatstroke patients and their associations with outcomes:A multicentre,retrospective,observational study

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World Journal of Gastroenterology 2024年第4期30卷 346-366页

作者： Yu-Cong Wang Xin-Yang Jin Zheng Lei Xiao-Jiao Liu Yu Liu Bang-Guo Zhang Jian Gong Lie-Tao Wang Lv-Yuan Shi Ding-Yuan Wan Xin Fu Lu-Ping Wang Ai-Jia Ma Yi-Song Cheng Jing Yang Min He Xiao-Dong Jin Yan Kang Bo Wang Zhong-Wei Zhang Qin Wu Department of Critical Care Medicine West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina School of Pharmacy Macao University of Science and TechnologyMacao 999078China Department of Critical Care Medicine The First People's Hospital of Ziyang CityZiyang 641399Sichuan ProvinceChina Department of Critical Care Medicine The First People's Hospital of Guanghan CityChengdu 618399Sichuan ProvinceChina Department of Critical Care Medicine Lezhi County Traditional Chinese Medicine HospitalChengdu 641599Sichuan ProvinceChina Department of Critical Care Medicine Chengdu Qingbaijiang District People's HospitalChengdu 610399Sichuan ProvinceChina Department of Critical Care Medicine Ziyang People's HospitalChengdu 641399Sichuan ProvinceChina

BACKGROUND extreme heat exposure is a growing health problem,and the effects of heat on the gastrointestinal(GI)tract is *** study aimed to assess the incidence of GI symptoms associated with heatstroke and its impact on *** To assess the incidence of GI symptoms associated with heatstroke and its impact on *** Patients admitted to the intensive care unit(ICU)due to heatstroke were included from 83 *** history,laboratory results,and clinically relevant outcomes were recorded at ICU admission and daily until up to day 15,ICU discharge,or *** symptoms,including nausea/vomiting,diarrhoea,flatulence,and bloody stools,were *** characteristics of patients with heatstroke concomitant with GI symptoms were *** regression analyses were performed to determine significant predictors of GI *** A total of 713 patients were included in the final analysis,of whom 132(18.5%)patients had at least one GI symptom during their ICU stay,while 26(3.6%)suffered from more than one *** with GI symptoms had a significantly higher ICU stay compared with those *** mortality of patients who had two or more GI symptoms simultaneously was significantly higher than that in those with one GI *** logistic regression analysis revealed that older patients with a lower GCS score on admission were more likely to experience GI *** The GI manifestations of heatstroke are common and appear to impact clinically relevant hospitalization outcomes.

关键词： extreme heat Flatulence Sunstroke Intensive care units Diarrhea

Implications of the extremely hot summer of 2022 on urban ozone control in China

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Atmospheric and Oceanic Science Letters 2024年第6期17卷 3-7页

作者： Wenhao Qiao Ke Li Zhenjiang Yang Lei Chen Hong Liao Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjingChina

Frequent occurrences of extreme heat are causing severe ozone pollution over *** study examined the driving factors of urban ozone pollution in China during the extremely hot summer of 2022 and the impact of emission control strategies using surface measurements and the GEOS-Chem *** results show that ozone pollution was extremely severe in summer 2022,with a significant rebound by 12-15 ppbv in the North China Plain(NCP),Yangtze River Delta(YRD),and Sichuan basin(SCB),compared to *** over the NCP,the MDA8(maximum daily 8-hourly average)ozone exceeded 160 ppbv,and the number of ozone exceedances was over 42 *** on an IPR(integrated process rate)analysis,the authors found that the net chemical production was the dominant factor contributing to the strong ozone increase in summer *** example,in June over the NCP,the net chemical production resulted in an increase by 3.08 Gg d^(−1)(∼270%)in ozone mass *** simulations showed that both NO_(x)(nitrogen oxides)and VOC(volatile organic compound)reductions were important over the NCP,and NO_(x)reductions were more important than VOCs over southern *** keep the ozone of 2022 at the same level as 2021,a joint reduction of NO_(x)and VOCs by at least 50%-60%would have been *** study highlights the urgency to develop effective ozone management since extreme heat will become more frequent.

关键词： Ozone pollution extreme heat Emission controls Joint reductions China

Sahel Afforestation and Simulated Risks of heatwaves and Flooding Versus Ecological Revegetation That Combines Planting and Succession

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Journal of Geoscience and Environment Protection 2022年第2期10卷 94-108页

作者： Lorenz Huebner Ayad M. Fadhil Al-Quraishi Oliver Branch Heman A. A. Gaznayee Flensburg Germany Petroleum and Mining Engineering Department Faculty of Engineering Tishk International University Erbil Kurdistan Region Iraq Institute of Physics and Meteorology University of Hohenheim Stuttgart Germany Department of Forestry College of Agricultural Engineering Sciences Salahaddin University Erbil Kurdistan Region Iraq

Studies simulating the large-scale afforestation of the African Sahel constantly find warning signals of increased risk of extreme temperatures and heatwaves resulting from changes in albedo and latent heat flow. We review the afforestation measures underlying three simulation studies, together with a restoration model in which compartments are formed by greenbelts to enable succession of savanna vegetation, protected from hot wind and drought. Savanna-like vegetation (around 20% woody plants) will show bright reflective surface and drying of leaves during dry season rather than constant green color, with very different impact on albedo and temperatures. We derive that the simulated risks of extreme heat and flooding from rain will strongly depend on species, shape and density of the new vegetation. Ecological restoration concepts are expected to mitigate or prevent such restoration related climatic risks. Compact afforestation of the Sahel does not appear to be necessary or feasible. A restoration model based on compartmentalization and the protected succession of diverse, climatically adaptable vegetation could also be used in populated drylands, as a sustainable and temperature balancing solution to desertification.

关键词： extreme heat Vegetational Compartments Natural Succession Dryland Restoration Savanna Vegetation Sahel Climate Simulation