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Ab initio density functional theory approach to warm dense hydrogen:From density response to electronic correlations 认领 引用 被引量：1
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作者 Zhandos A.Moldabekov Xuecheng Shao +5 位作者 Hannah M.Bellenbaum Cheng Ma Wenhui Mi Sebastian Schwalbe Jan Vorberger Tobias Dornheim 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期14-20,共7页
Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse ... Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse of warm dense matter theory is thermal density functional theory(DFT),which,however,suffers from two limitations:(i)its accuracy can depend on the utilized exchange-correlation functional,which has to be approximated,and(ii)it is generally limited to single-electron properties such as the density distribution.Here,we present a new ansatz combining time-dependent DFT results for the dynamic structure factor See(q,ω)with static DFT results for the density response.This allows us to estimate the electron-electron static structure factor See(q)of warm dense hydrogen with high accuracy over a broad range of densities and temperatures.In addition to its value for the study of warm dense matter,our work opens up new avenues for the future study of electronic correlations exclusively within the framework of DFT for a host of applications. 展开更多
关键词 thermal density functional theory dft whichhoweversuffers understanding properties warm dense hydrogen thermal density functional theory understand further optimize inertial confinement fusion applicationsthe warm dense matter theory electronic correlations warm dense hydrogen density functional theory
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Effects of nighttime warming and nitrogen addition on phytoplankton biomass in a submerged macrophytes-dominated freshwater wetland 认领 引用 被引量：2
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作者 Yaru Lyu Jiayin Feng +9 位作者 Wenjing Ma Chao Wang Mengyu Yan Zixuan Yang Yunpeng Guo Jinhua Zhang Hongpeng Wang Jingyi Ru Xueli Qiu Shiqiang Wan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期721-730,共10页
Climate warming and atmospheric nitrogen(N)deposition have profound influences on the terrestrial biosphere.However,how these two global change drivers affect phytoplankton which are important primary producers in wet... Climate warming and atmospheric nitrogen(N)deposition have profound influences on the terrestrial biosphere.However,how these two global change drivers affect phytoplankton which are important primary producers in wetlands with large carbon stocks and complex hydrological fluctuations remain largely unclear.As part of a two-year field experiment in a freshwater wetland,this study was conducted to investigate the effects of nighttime warming and N addition on phytoplankton biomass in the North China Plain.The results showed that neither nighttime warming nor N addition influenced the Shannon-Wiener index of phytoplankton community.Nighttime warming did not change phytoplankton biomass,likely due to the different warming impacts on dominant phyla and in different seasons.Decreased phytoplankton biomass in spring because of the increased water pH and submerged plant coverage was compensated by the enhanced biomass in autumn due to the reduced dissolved oxygen and submerged plant coverage,leading to the neutral change of phytoplankton biomass under warming.Nitrogen addition elevated phytoplankton biomass by 11.6%,which could be attributed to the enhanced nutrient availability and reduced submerged plant coverage.Positive relationships of methane(CH4)emission rates at the water-air interface with phytoplankton biomass indicated the potentially crucial role of phytoplankton in mediating wetland CH4 cycling through photosynthesis-driven metabolisms.The findings suggested the seasonal variation of phytoplankton and their potential responses to nighttime warming and N deposition,which may provide a more accurate basis for assessing the global change-carbon feedback in wetland ecosystems. 展开更多
关键词 Climate warming Nitrogen deposition Phytoplankton community Freshwater lake Seasonal variation
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Seasonal contrasts in recent Arctic warming processes: surface air temperature versus surface temperature 认领 引用 被引量：1
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作者 CAI Ziyi WU Fangying +3 位作者 OUYANG Huiling YOU Qinglong Sergey K.GULEV Seok-Woo SON 《Advances in Polar Science》 CSCD 2026年第2期182-199,共18页
Arctic warming has been widely documented, yet the relative contributions of processes controlling surface air temperature(SAT) and surface temperature(ST) warming remain insufficiently quantified, particularly betwee... Arctic warming has been widely documented, yet the relative contributions of processes controlling surface air temperature(SAT) and surface temperature(ST) warming remain insufficiently quantified, particularly between warm and cold seasons. Here, we use multiple reanalysis datasets to quantify Arctic SAT and ST warming from 1979 to 2021 through thermodynamic and surface energy budget analyses, with a focus on the seasonal contrast between warm season and cold season. We show that SAT warming in both seasons is primarily linked to an increase in the diabatic heating residual associated with surface warming, whereas cold season SAT warming is additionally enhanced by strengthened warm advection, which accounts for 33% of the total SAT increase. ST warming exhibits a stronger seasonal contrast. In the warm season, ST warming is driven jointly by enhanced downward longwave radiation, mainly associated with increased atmospheric water vapor, and sea ice albedo feedback, contributing 27% and 33% of the ST increase, respectively. In the cold season, ST warming is dominated by enhanced downward longwave radiation, with atmospheric water vapor, mid-level cloud cover, and a residual term mainly related to external greenhouse gas forcing contributing 36%, 16%, and 10%, respectively. The Arctic Ocean further modulates this seasonality by absorbing heat in the warm season and releasing it in the cold season, contributing 21% to cold season ST warming and providing an additional heat source for the lower atmosphere. These results demonstrate that recent Arctic warming cannot be interpreted from SAT or ST alone, but reflects seasonally distinct coupling among atmospheric heat transport, radiative feedbacks, sea ice loss, and ocean heat storage and release. 展开更多
关键词 Arctic warming process quantitative contribution surface energy budget
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Drivers of CO2 and CH4 fluxes from shallow lakes and prediction based on climate factors under global warming 认领 引用
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作者 Zhentao Wu Hui Liu +6 位作者 Fan Yang Rui Ran Huimin Yu Haonan Xu Danyun Chen Geng Wang Xiaobing Pang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期794-802,共9页
Shallow lakes are recognized as significant sources of greenhouse gas(GHG)emissions,yet long-term measurements and predictions of GHG fluxes from these ecosystems remain limited.Here,we systematically investigated the... Shallow lakes are recognized as significant sources of greenhouse gas(GHG)emissions,yet long-term measurements and predictions of GHG fluxes from these ecosystems remain limited.Here,we systematically investigated the temporal dynamics of GHG fluxes and the underlying drivers in a shallow lake in Zhejiang Province,Yangtze River Delta,China,using the static floating chamber method.The annual average fluxes were positive,implying the lake is a substantial carbon source,with CO2fluxes of 10.83±11.25 mmol/(m2·day)and CH4fluxes of1.64±0.96 mmol/(m2·day).Principal component analysis identified air temperature and pressure as key meteorological drivers influencing water quality and GHG fluxes.Combining multiple linear regression models,we predict GHG fluxes from water bodies in China under low,medium and high carbon emissions scenarios for the years 2030 and 2060,providing important insights for predicting greenhouse gas fluxes from water bodies during China’s carbon neutrality period.Our predictions suggest that water bodies in the Tibetan Plateau will become an intense GHG source,exacerbated by fragile ecosystems and abundant water resources.Additionally,CH4fluxes from southern China’s water bodies are expected to rise notably with higher emissions scenario,likely driven by rapid warming and intensified anaerobic fermentation in rice paddies.These findings highlight the significant potentials for GHG emissions from water bodies during China’s carbon neutrality period and underscore the importance of water quality management to mitigate these emissions. 展开更多
关键词 Greenhouse gas Shallow lake Carbon neutrality Global warming Emission scenarios
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Radial growth and its temporal stability of Dahurian larch in the southern boreal forest: Divergent trends during climate warming and warming hiatus 认领 引用
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作者 Zhongtong Peng Enzai Du +2 位作者 Yang Tang Tao He Yuehan Tian 《Forest Ecosystems》 SCIE CAS CSCD 2026年第2期321-330,共10页
Climate warming has reshaped the structure and function of global boreal forest with expected negative impacts at its southern margins.A warming hiatus has occurred in many high-latitude regions in recent decades,but ... Climate warming has reshaped the structure and function of global boreal forest with expected negative impacts at its southern margins.A warming hiatus has occurred in many high-latitude regions in recent decades,but its impacts on tree growth in the southern boreal forest remain unclear.We sampled tree rings of Dahurian larch(Larix gmelinii)in the southern boreal forest of the Greater Khingan Mountains(GKM)and examined the trends of tree growth and its temporal stability based on the age-detrended basal area increment(BAI)for the periods of rapid warming(1962-1992)and warming hiatus(1993-2022).The results indicate that age-detrended BAI declined significantly during the warming period,while it showed no further decrease during the period of warming hiatus.Tree growth decline was associated with higher daily maximum air temperature in the main growing season and daily minimum air temperature in the non-growing season,as well as lower precipitation in the early growing season and daily minimum air temperature in the main growing season.During the warming hiatus,tree growth was positively regulated by the precipitation in the non-growing season,daily maximum air temperature in the early growing season,and daily minimum air temperature in the main growing season,but negatively affected by the daily maximum air temperature in the late growing season.Intriguingly,tree growth stability declined significantly during the warming period and recovered rapidly during the period of warming hiatus.The decline in tree growth stability was mainly explained by increasing daily minimum air temperature in the non-growing season.The recovery of tree growth stability was associated with lower precipitation in the non-growing season,higher interannual stability of daily maximum air temperature in the early growing season,higher interannual mean value and stability of daily maximum air temperature in the late growing season,and lower interannual mean value and stability of daily minimum air temperature in the main growing season.Our findings highlight a rapid recovery of tree growth stability instead of growth rate during the warming hiatus following a period of rapid warming and provide new insights into the decadal-scale resilience of the southern boreal forest in response to climate change. 展开更多
关键词 Basal Area Increment Boreal tree Dahurian larch Decadal-scale resilience Interannual variability Temperature stress Temporal stability Warming hiatus
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Warm-season non-refractory PM2.5 composition in urban Tianjin and Beijing:Two megacities of the North China Plain 认领 引用
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作者 Qingqing Wang Lu Lei +10 位作者 Yanpei Li Wei Hu Libin Wu Junjun Deng Jin Feng Chun Chen Borong Cheng Jiang Zhu Pingqing Fu Yele Sun Zifa Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期740-751,共12页
Chemical species and organic aerosol(OA)sources of atmospheric non-refractory particulate matter(NR-PM)were compared between Beijing and Tianjin during warm seasons.Beijing exhibits superior PM2.5 control efficacy,... Chemical species and organic aerosol(OA)sources of atmospheric non-refractory particulate matter(NR-PM)were compared between Beijing and Tianjin during warm seasons.Beijing exhibits superior PM2.5 control efficacy,with consistently lower concentrations and better spatial uniformity than those in Tianjin.Tianjin shows higher concentrations of OA,nitrate,and ammonium.The secondary OA(SOA)composition differs significantly between the two cities.Tianjin suffers severer photochemical pollution with higher O3 and oxidant levels,revealing stronger atmospheric oxidation capacity.Beijing s dominant wind directions feature alternating northerly and southerly winds,while Tianjin is characterized by persistent easterly and southerly flows.This difference in wind patterns results in a 5-h disparity in the diurnal peak timing of NR-PM2.5 between the two cities.Additionally,compositional and meteorological differences lead to distinct pollution formation mechanisms.Tianjin shows pronounced nocturnal accumulation of primary emissions,while Beijing demonstrates more stable nighttime levels.Source analysis highlights Beijing's effective vehicle emission control despite its larger vehicle fleet.Tianjin's peak hourly increase rate of COA is 1.8 times Beijing's in spring but only 0.4 times in summer.Sharing control experience and co-developing a real-time,high-resolution“cooking-traffic”emission inventory will help both cities refine source-specific controls.Both cities face PM2.5-O3 co-pollution challenges,more severe in Tianjin,with secondary inorganic aerosols dominating during high pollution episodes.Furthermore,our results underscore the necessity for enhanced regional collaborative governance to combat secondary pollution.Pollutants transport to Tianjin are dominated by southerly and easterly transport,whereas Beijing is primarily influenced by southerly transport and nearby northwestern regions. 展开更多
关键词 Non-refractory PM2.5 Chemical species Organic aerosol sources Tianjin Beijing Warm seasons
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Patterns and drivers of vegetation resilience across China and the negative impact of warm droughts 认领 引用
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作者 Xueming Zhao Zhaoju Zheng +4 位作者 Bernhard Schmid Yujin Zhao Dan Zhao Bingfang Wu Yuan Zeng 《Geography and Sustainability》 CSCD 2026年第3期63-75,共13页
Ecological resilience—defined as the capacity of ecosystems to withstand perturbations—is an important dimension of ecosystem stability.However,the spatial patterns and underlying drivers of resilience in forests re... Ecological resilience—defined as the capacity of ecosystems to withstand perturbations—is an important dimension of ecosystem stability.However,the spatial patterns and underlying drivers of resilience in forests relative to grasslands remain poorly understood.Using a temporal autocorrelation index(AC1)derived from satellite-based vegetation indices,we assessed high-resolution(250 m)vegetation resilience from 2000 to 2020 across China's natural terrestrial vegetation.We found that vegetation in forest-dominated regions was more resilient than in grassland-dominated regions,with divergent associations to climate,vegetation,soil,topography,and human drivers.Specifically,forest resilience was primarily associated with climate variables,with path analysis indicating a potential indirect link through vegetation characteristics.By contrast,grassland resilience was strongly related to soil and topographic properties.Particularly,among the climate variables examined,long-term warm drought condition,represented by the negative of Standardized Precipitation Evapotranspiration Index(SPEI),generally showed spatial negative associations with resilience,especially in temperate steppe and subtropical forest regions.Notably,the resilience of cold forests and high-altitude grasslands showed weaker or even positive relationship with warm droughts.These findings highlight the threats posed by ongoing climate change to vegetation resilience,and emphasize the need for ecosystem-specific strategies to enhance resilience in the future. 展开更多
关键词 Ecological resilience Temporal autocorrelation Warm droughts Remote sensing Vegetation index
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Response of Climatological Normals to Climate Warming in Guangdong,South China 认领 引用
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作者 ZHANG Liu-hong LIU Wei +2 位作者 DUAN Hai-lai ZHENG Jing ZHANG Qiong-xiong 《Journal of Tropical Meteorology》 SCIE CAS CSCD 2026年第3期315-326,共12页
Climatological normals are 30-year averages of meteorological variables and their derived statistics,used as predictors of future climate conditions and climatic backgrounds for certain regions.Decadally updated norma... Climatological normals are 30-year averages of meteorological variables and their derived statistics,used as predictors of future climate conditions and climatic backgrounds for certain regions.Decadally updated normals have changed in response to climate warming.Therefore,it is essential to investigate the differences between the new(1991–2020)and old(1981–2010)climatological normals in Guangdong Province.In this study,basic climate warming facts were revealed through temperature analysis based on data from 86 national meteorological observatories.Subsequently,multiple climate indicators derived from daily temperature and precipitation were analyzed.Temperature-derived indicators show that in the new climatic stage,Guangdong Province experienced an increase of 3.9 d in the annual average of high-temperature days and a decrease of 1.1 d in low-temperature days,while cold-wave days decreased by 0.2 d,reflecting climate warming.Precipitation patterns shifted across various temporal scales:annually,seasonally,monthly,during the flood season,and the“Dragon Boat Water”period.Notably,the amount of rainstorms and the number of rainstorm days increased,whereas total rainfall and rainfall days decreased.Furthermore,the rainy season began an average of 5.0 d later in the new normal than in the old.Multi-scale analysis revealed that the temperature differences between the new and old climatological normals were primarily driven by a dominant linear warming trend,whereas precipitation differences were mainly dominated by interannual variability,which explains the insignificant change in annual total precipitation. 展开更多
关键词 climate warming climatological normals temperature precipitation Guangdong Province
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Robust Increase in Indian Summer Monsoon Intraseasonal Variability in a Warmer Climate 认领 引用
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作者 Gopinadh KONDA Jasti S.CHOWDARY +4 位作者 C.GNANASEELAN June-Yi LEE Anant PAREKH Naresh Krishna VISSA Phani Murali KRISHNA 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第5期1079-1091,I0042-I0060,共13页
Despite its significant societal and scientific importance,projected changes in the characteristics of intraseasonal oscillations(ISOs)associated with Indian summer monsoon rainfall under increased greenhouse gas conc... Despite its significant societal and scientific importance,projected changes in the characteristics of intraseasonal oscillations(ISOs)associated with Indian summer monsoon rainfall under increased greenhouse gas concentrations remain largely unexplored.This study utilizes downscaled and bias-corrected historical simulations and projections from 17 CMIP6 models to investigate the future evolution of ISOs.Our findings reveal a twofold increase in ISO variability over India in the far future under the very high emissions scenario,raising critical concerns about its adverse socioeconomic impacts.Our analysis suggests that the increased magnitude of precipitation anomalies associated with northwardpropagating ISOs may intensify active monsoon spells,potentially triggering extreme rainfall events.Additionally,the phase speed of these northward-propagating ISOs over the Bay of Bengal is projected to accelerate owing to weakened air-sea coupling and feedback.This acceleration reduces the northwest-southeast tilt of the precipitation band,altering the spatial structure of the ISOs.Concurrently,the strengthening of circulation-precipitation feedback and warming of the Indian Ocean are projected to enhance the phase speed of monsoon ISOs,leading to more frequent active spells.This study underscores the critical role of regional ocean-atmosphere feedback in shaping future ISO characteristics,highlighting the urgent need for improved understanding and prediction of these changes in the context of a warming climate. 展开更多
关键词 intraseasonal oscillations global warming air-sea interactions downscaling bias correction CMIP6
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Predicting global distribution of the giant kelp Macrocystis pyrifera under climate warming 认领 引用
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作者 Shuxiang RUAN Ke SUN +7 位作者 Yitao WANG Xiaowen ZHANG Dong XU Xiao FAN Wei WANG Pengyan ZHANG Lepu WANG Naihao YE 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2026年第1期160-173,共14页
Giant kelp Macrocystis pyrifera,an important foundation species with great ecological and economic value,is threatened by climate change.To better understand the impact of climate warming on M.pyrifera,we investigated... Giant kelp Macrocystis pyrifera,an important foundation species with great ecological and economic value,is threatened by climate change.To better understand the impact of climate warming on M.pyrifera,we investigated its global distribution dynamics by an optimized species distribution model(SDM).Results showed that wave height,sea surface temperature,benthic temperature,and benthic phosphate concentration were key factors shaping the distribution of M.pyrifera.In addition to currently known distribution regions,the model revealed potential suitable habitats globally.Under future climate scenarios,the habitat suitability of M.pyrifera would decrease at low latitudes and increase at high latitudes,resulting in a poleward shift of suitable habitats.In the regions currently occupied by M.pyrifera,the high suitable habitats were predicted to shrink,which implies that the existing M.pyrifera would be adversely impacted.These results serve as references for the conservation and utilization of M.pyrifera resource. 展开更多
关键词 Macrocystis pyrifera kelp forest species distribution model(SDM) MaxEnt climate warming
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Impacts of 1.5℃ and 2.0℃ Global Warming on the Onset,Cessation,and Length of the Rainy Season in Global Land Monsoon Regions 认领 引用
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作者 Thierry N.TAGUELA Ibraheem RAJI +4 位作者 Akintomide A.AKINSANOLA Priyanshi SINGHAI Oluwafemi E.ADEYERI Caroline M.WAINWRIGHT Rondrotiana BARIMALALA 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第1期87-102,共16页
The onset,cessation,and length of the rainy season are crucial for global water resources,agricultural practices,and food security.However,the response of precipitation seasonality to global warming remains uncertain.... The onset,cessation,and length of the rainy season are crucial for global water resources,agricultural practices,and food security.However,the response of precipitation seasonality to global warming remains uncertain.In this study,we analyze how global warming levels(GWLs)of 1.5℃ and 2℃ could affect the timing of rainfall onset(RODs),rainfall cessation(RCDs),and the overall duration of the rainy season(LRS)over global land monsoon(GLM)regions using simulations from CMIP6 under the SSP2-4.5 and SSP5-8.5 scenarios.With high model consensus,our results reveal that RODs are projected to occur later over Southern Africa,North Africa,and South America,but earlier over South Asia and Australia,in a warmer climate.The projected early RODs in Australia are more pronounced at the 2℃ GWL under SSP5-8.5.On the other hand,early RCDs are projected over South America and East Asia,while late RCDs are projected over North Africa,with high inter-model agreement.These changes are associated with a future decrease in LRS in most GLM regions.Additionally,we found that continuous warming over 1.5℃ will further reduce the length of the rainy season,especially over the South America,North Africa,and Southern Africa monsoon regions.The findings underscore the urgent need to mitigate global warming. 展开更多
关键词 rainfall onset rainfall cessation global land monsoon rainy season length CMIP6 projections global warming levels
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Climate driven rapid northward expansion of a songbird from subtropical to warm temperate zones:Dispersal corridors and future suitable habitat 认领 引用
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作者 Hongrui Lv Xiaolu Jiao +2 位作者 Hongying Xu Gang Song Fumin Lei 《Avian Research》 SCIE CAS CSCD 2026年第3期620-629,共10页
While it is well established that climate change is driving species toward higher latitudes,the spatiotemporal dynamics of dispersal—particularly from subtropical to warm-temperate zones—remain poorly understood.Her... While it is well established that climate change is driving species toward higher latitudes,the spatiotemporal dynamics of dispersal—particularly from subtropical to warm-temperate zones—remain poorly understood.Here,we combined ecological niche differentiation,functional landscape connectivity,and species distribution models(SDMs)to investigate the northward expansion of the Collared Finchbill(Spizixos semitorques)from southern China(subtropical zone)to northern China(warm temperate zone)over the past decade(2015–2024).The species was first recorded in Beijing in 2015,providing a clear temporal marker for the onset of rapid colonization at the expansion front.Our analyses revealed that compared to native-range populations,those in the expansion region show a partial shift in their ecological niche,occupying new environmental and geographic spaces.Functional landscape connectivity analysis further identified two main dispersal routes from the native range toward the expansion front region:a dominant“mountain corridor”along the Qinling,Taihang,and Yanshan ranges,and a secondary“plain corridor”across the eastern plains,with Mount Tai serving as a key dispersal hub.Moreover,SDM-based projections for 2060 and 2100 suggest that this northward expansion might continue and reach Liaoning Province,which could become a potential suitable habitat.Overall,our findings highlight the critical interplay between climatic niche shifts and landscape connectivity in facilitating rapid range expansion,providing a mechanistic framework for understanding how subtropical species colonize warmtemperate zones. 展开更多
关键词 Climate change Warm temperate zone Niche overlap and drift Ecological corridors Functional landscape connectivity Species distribution models
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Effects of Warming on Coastal Viral Decay and Production Rate 认领 引用
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作者 GAO Siru WANG Hongsong +1 位作者 LV Jiayi ZHAN Yuanchao 《Journal of Ocean University of China》 SCIE CAS CSCD 2026年第1期228-236,共9页
Viral infections play a crucial role in marine biogeochemical cycles,by regulating bacterial mortality and mediating nutrient and carbon fluxes.However,despite of their ecological significance,existing climate change ... Viral infections play a crucial role in marine biogeochemical cycles,by regulating bacterial mortality and mediating nutrient and carbon fluxes.However,despite of their ecological significance,existing climate change models generally fail to incorporate virus-mediated ecological processes due to the current limited understanding of marine viral dynamics under global warming.While numerous studies have explored the effect of warming for viral decay and production,how temperature regulates the total abundance of marine viruses remains unclear.In this study,we conducted year-round measurements of viral production and decay rates in Qingdao's coastal waters,with additional experimental warming treatments.The result showed that under in-situ temperature,the viral decay and production rate displayed distinct seasonal variations.With the exception of summer,elevated temperature stimulated both viral decay rate and production rate,and further improved the net viral production rate.While in summer,the net viral production rate turned negative,implying divergent threshold viral decay and viral production rate on warming.Our study deepens the understanding of the effect of global warming on marine viruses and provides scientific data for climate change models. 展开更多
关键词 viral decay viral production warming net viral production
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A comparative case study of low-latitude ionosphere–thermosphere responses to successive wave-1-dominant and wave-2-dominant sudden stratospheric warming events in 2022 using the ICON and GOLD missions 认领 引用
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作者 ManYu Zhang Jing Liu +4 位作者 MaoSheng He XuGuang Cai Quan Gan YuSong Qin ShuHan Li 《Earth and Planetary Physics》 EI CSCD 2026年第4期557-570,共14页
Previous studies have demonstrated that sudden stratospheric warming(SSW)events can have a substantial impact on the Earth's ionosphere–thermosphere(IT)system.In this study,we present a case study using observati... Previous studies have demonstrated that sudden stratospheric warming(SSW)events can have a substantial impact on the Earth's ionosphere–thermosphere(IT)system.In this study,we present a case study using observations from that National Aeronautics and Space Administration's(NASA's)Ionospheric Connection Explorer(ICON)and Global-scale Observations of the Limb and Disk(GOLD)missions to examine low-latitude IT responses during two successive SSW events in 2022 with different wavenumbers of the dominant planetary waves(wave-1 and wave-2),and we compare their event-time responses relative to the same pre-SSW reference period.Compared with observations during the pre-SSW periods,the first SSW event is characterized by southeastward wind accelerations below~99 km and northwestward wind accelerations above~99 km within the latitude range of 0°–40°N.In contrast,the second SSW event exhibits westward and northward acceleration(below~99 km)and eastward and southward acceleration at higher altitudes(above~99 km).Equatorial vertical ion drifts show upward drift in the morning during the first SSW and downward perturbations in the post midnight hours during the second,which may be attributed to changes in zonal winds.Meanwhile,significant enhancement ofΣO/N2(the column density ratio of atomic oxygen to molecular nitrogen)is observed during the daytime,along with a rise of~46 K in thermospheric temperature at an altitude of 150 km during the first SSW event.The ΣO/N2 and thermospheric temperature also increase during the second.The net effects of electric fields and atmospheric circulation result in an increase in nighttime F-region electron density during the first SSW event and a decrease during the second,as observed by GOLD.During the second SSW event,the semidiurnal migrating tide(SW2)is enhanced in the low-latitude region. 展开更多
关键词 sudden stratospheric warming ionosphere tides
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Multiscale energy conversion and transfer in the middle atmosphere during the 2023 sudden stratospheric warming 认领 引用
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作者 XiaoQi Wu CunYing Xiao +3 位作者 ZeWei Wang Yang Yu Luo Xiao Hao Li 《Earth and Planetary Physics》 EI CSCD 2026年第3期482-496,共15页
To understand energy transfer during sudden stratospheric warming (SSW) events in the middle atmosphere, the 2023 SSW is studied by using the analysis tools of the multiscale window transform (MWT) and MWT-based local... To understand energy transfer during sudden stratospheric warming (SSW) events in the middle atmosphere, the 2023 SSW is studied by using the analysis tools of the multiscale window transform (MWT) and MWT-based localized energetics analysis and theory of canonical transfer (MS-ECT). The energy transfer in the mesosphere is diagnosed and compared with that in the stratosphere. The energy fields are first reconstructed onto three scale windows: a large-scale window, an SSW-scale window, and a synoptic-scale window. Results showed that the work done by pressure (pressure flux) plays a critical role in coupling the mesosphere and stratosphere during SSW events. The cross-scale energy transfer (canonical transfer) of available potential energy is always directed from the large-scale to the SSW-scale window, indicating the central role of baroclinic instability in both the stratosphere and mesosphere. Comparative analysis with the 2012-2013 SSW event revealed the consistent presence of baroclinic instability across both events. However, the 2023 event exhibited significantly stronger energy transfer magnitudes in the mesosphere. These results highlight the consistent role of baroclinic instability and pressure flux in mediating cross-scale energy transfer during SSWs, providing a clearer understanding of stratosphere-mesosphere coupling. 展开更多
关键词 sudden stratospheric warming multiscale energetics analysis middle atmosphere
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Lanthanide-guided multi-color controllable composite phosphors with warm white light and multi-channel fluorescence labeling application strategy 认领 引用
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作者 Ya Li Yunxiao Ma +3 位作者 Hui Yu Ming Yang Xiangting Dong Zhijia Lv 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第4期1015-1022,I0002,共8页
Due to the difficulty of luminescence intensity optimization and color control,the research on the regulatable warm white light emitting devices and fluorescent labels for multi-color detection is ongoing.The Ln3+-... Due to the difficulty of luminescence intensity optimization and color control,the research on the regulatable warm white light emitting devices and fluorescent labels for multi-color detection is ongoing.The Ln3+-Bi2(PTA)3/Bi2O3phosphors with rod-shaped structure were prepared by one-step hydrothermal method,and the incorporation of Bi2O3and terephthalic acid(PTA)ligand effectively magnifies the absorption ability for the photons to enhance the emission intensity.The mono lanthanide-doped DyBi2(PTA)3/Bi2O3exhibits pure cool white light,and it can be transformed to warm white light with the codoped Eu3+amount increasing.Eu3+-Tb3+-Bi2(PTA)3/Bi2O3can emit red and green light,which is used as the multi-color fluorescence labeling,and the mixed formed yellow light fills the blank of the yellow lighting device. 展开更多
关键词 Ln3+-Bi2(PTA)3/Bi2O3 Luminescence material Light color adjustable phosphor Warm white emission W-WLEDs Rare earths
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Combining different climate datasets better reflects the response of warm-temperate forests to climate:a case study from Mt.Dongling,Beijing 认领 引用
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作者 Shengjie Wang Haiyang Liu +1 位作者 Shuai Yuan Chenxi Xu 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第2期131-143,共13页
Accurately assessing the relationship between tree growth and climatic factors is of great importance in dendrochronology.This study evaluated the consistency between alternative climate datasets(including station and... Accurately assessing the relationship between tree growth and climatic factors is of great importance in dendrochronology.This study evaluated the consistency between alternative climate datasets(including station and gridded data)and actual climate data(fixed-point observations near the sampling sites),in northeastern China’s warm temperate zone and analyzed differences in their correlations with tree-ring width index.The results were:(1)Gridded temperature data,as well as precipitation and relative humidity data from the Huailai meteorological station,was more consistent with the actual climate data;in contrast,gridded soil moisture content data showed significant discrepancies.(2)Horizontal distance had a greater impact on the representativeness of actual climate conditions than vertical elevation differences.(3)Differences in consistency between alternative and actual climate data also affected their correlations with tree-ring width indices.In some growing season months,correlation coefficients,both in magnitude and sign,differed significantly from those based on actual data.The selection of different alternative climate datasets can lead to biased results in assessing forest responses to climate change,which is detrimental to the management of forest ecosystems in harsh environments.Therefore,the scientific and rational selection of alternative climate data is essential for dendroecological and climatological research. 展开更多
关键词 Climate data representativeness Alternative climate data selection Response differences Deciduous broad-leaf forest Warm temperate zone
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Warm hybrid axion inflation in α-attractor models constrained by ACT and future plan experiments 认领 引用
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作者 Waqas Ahmed Waqar Ahmad +1 位作者 Ahsan Illahi M.Junaid 《Chinese Physics C》 SCIE CAS CSCD 2026年第8期325-334,共10页
We present a comprehensive study of warm hybrid inflation within the framework ofα-attractor models,where an axionic inflaton is coupled to a waterfall field in the presence of thermal dissipation.The model is analyz... We present a comprehensive study of warm hybrid inflation within the framework ofα-attractor models,where an axionic inflaton is coupled to a waterfall field in the presence of thermal dissipation.The model is analyzed for both linear(Υ∝T)and cubic(Υ∝T3)dissipation regimes.Confronting the theoretical predictions with the latest observational data from Planck+BICEP/Keck,P-ACT-LB-BK18,and SPT,we find that in the weak dissipative regime(Q*■10-5),the scalar spectral index ns■0.965 lies at the boundary of the combined P-ACT-LB-BK18 constraints,while the tensor-to-scalar ratio r remains within observable ranges.For stronger dissipation(Q*■10-2),the model predicts values of ns well within the 1-2σ confidence region of all datasets,with tensor modes remaining fully observable in both dissipation scenarios.These results indicate that forthcoming CMB polarization experiments may be capable of detecting primordial gravitational waves,thereby providing a robust observational test of warm hybrid inflation across different dissipative regimes. 展开更多
关键词 warm hybrid axion α-attractor models atacama cosmology telescope
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Preoperative comprehensive warming care on hypothermia prevention and recovery quality in laparoscopic colon cancer surgery 认领 引用
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作者 An-Xiao Shi Feng-Deng Hu Jun-Xia Tong 《World Journal of Gastrointestinal Surgery》 SCIE 2026年第6期135-143,共9页
BACKGROUND Although laparoscopic radical resection for colorectal cancer offers advantages such as minimal invasiveness and rapid recovery,the incidence of intraoperative hypothermia remains high,significantly affecti... BACKGROUND Although laparoscopic radical resection for colorectal cancer offers advantages such as minimal invasiveness and rapid recovery,the incidence of intraoperative hypothermia remains high,significantly affecting patient prognosis.Traditional intraoperative thermoprotection measures have limitations in addressing heat redistribution following anaesthetic induction and the sustained loss of body heat during prolonged surgery.This study hypothesises that a comprehensive preoperative warming strategy,which shifts the timing of thermal intervention to the preoperative period,can more effectively maintain stable core body temperature in patients,thereby reducing the incidence of hypothermia,preserving coagulation function and promoting postoperative recovery.AIM To investigate effects of preoperative warming on hypothermia and recovery in laparoscopic colon cancer surgery.METHODS From August 2021 to August 2025,118 colon cancer patients undergoing laparoscopic radical resection were randomized into observation and control groups(n=59 each).The control group received routine intraoperative warming,while the observation group received additional preoperative comprehensive warming.Comparisons included core temperature,hypothermia incidence,perioperative indicators,bleeding-related outcomes,coagulation function,and adverse reactions.RESULTS No significant differences were found in baseline data or preoperative temperature(P>0.05).Compared with controls,the observation group had higher core temperature at 30 minutes,1 hour,and end of surgery,and a lower hypothermia rate(11.86%vs 33.90%,P<0.05).The observation group also showed shorter operative time,anesthesia recovery time,first flatus time,hospital stay,lower Visual Analog Scale score on day 1,less blood loss and drainage,and better mobility on day 1(P<0.05).Fewer patients required intraoperative transfusion(5.08%vs 15.25%,P<0.05).Coagulation parameters remained stable postoperatively in the observation group and were significantly better than controls(P<0.05).The total incidence of postoperative adverse events was lower in the observation group(3.39%vs 16.95%,P<0.05).CONCLUSION Preoperative comprehensive warming effectively maintains core temperature,reduces hypothermia,protects coagulation,minimizes adverse reactions,and promotes recovery in laparoscopic colon cancer surgery. 展开更多
关键词 Preoperative comprehensive warming care Laparoscopic radical resection of colon cancer Hypothermia Coagulation function Postoperative recovery
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