Atmospheric Research最新文献

{"title":"Comparative analysis in sensitivity of PM2.5 mass to ammonia and nitrate availability between Hong Kong and Shanghai reveals comparative importance of chemistry and meteorology","authors":"Zijing Zhang ,&nbsp;Min Zhou ,&nbsp;Shuhui Zhu ,&nbsp;Hongli Wang ,&nbsp;Liping Qiao ,&nbsp;Dandan Huang ,&nbsp;Jian Zhen Yu","doi":"10.1016/j.atmosres.2026.108846","DOIUrl":"10.1016/j.atmosres.2026.108846","url":null,"abstract":"<div><div>Reductions in sulfate over recent years have increased the relative contributions of nitrate and ammonium to PM_2.5 in Chinese megacities, shifting the focus of further PM abatement toward these semi-volatile species. This shift in focus makes understanding gas-particle partitioning, which is governed by aerosol pH and temperature, central to predicting their particle-phase contributions. Using hourly measurements of water-soluble inorganic ions (WSIIs) and related gases in Hong Kong and Shanghai, we constrained aerosol pH and aerosol water content (AWC) with ISORROPIA-II and evaluated PM_2.5 mass sensitivity to total nitrate (TNO₃ = HNO₃ + NO₃⁻) and total ammonia (TNH₃ = NH₃ + NH₄⁺). In Hong Kong, sulfate dominated the WSIIs, whereas nitrate was dominant in Shanghai. The seasonally lower temperature (≈ 6–9 °C) in Shanghai, combined with a lower sulfate fraction, contributed to an aerosol pH approximately one unit higher than that in Hong Kong. The combination of higher pH and lower temperature in Shanghai favored particulate nitrate formation (high ε(NO₃⁻)), increasing PM sensitivity to TNO₃. Our quantitative sensitivity analysis showed that cutting TNO₃ in Shanghai was as effective as cutting sulfate for PM_2.5 reduction, while TNH₃ controls required reductions of &gt;40% to become effective. Consistent with its distinct chemical and meteorological regime, PM_2.5 in Hong Kong was co-sensitive to both TNH₃ and TNO₃, indicating that a synergistic control strategy is optimal. Meteorology modulated these sensitivities primarily by altering aerosol pH and partitioning. Temperature exerted the strongest influence by directly controlling the thermodynamic equilibrium. High relative humidity favored greater aerosol water content, elevating aerosol pH and further promoting nitrate partitioning. Chemical composition, notably the sulfate and nitrate levels, also played a decisive role by setting the initial chemical regime. This contrast demonstrates that the lower temperatures and higher aerosol pH in Shanghai amplifies PM_2.5 sensitivity to TNO₃, warranting prioritized NO_x control. In warmer Hong Kong, the lower aerosol pH and dominant role of sulfate result in co-sensitivity to both precursors, necessitating coordinated abatement. Thus, effective PM_2.5 mitigation requires strategies tailored to local chemical-meteorological regimes.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108846"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dipole patterns of spring precipitation in northeast China: Links to Kara Sea Ice and Eurasian snow cover","authors":"Xinya Shu ,&nbsp;Shanshan Wang ,&nbsp;Yuanyuan Hu ,&nbsp;Yiwei Pang ,&nbsp;Hao Wang ,&nbsp;Yongli He ,&nbsp;Fei Ji ,&nbsp;Jianping Huang ,&nbsp;Jinxia Zhang","doi":"10.1016/j.atmosres.2026.108829","DOIUrl":"10.1016/j.atmosres.2026.108829","url":null,"abstract":"<div><div>Previous studies rarely consider the regional disparity in precipitation variability beyond the overall consistency in Northeast China (NEC). This study examines the spatial distribution and variability of spring precipitation in NEC, a critical region for grain production that is prone to precipitation-related natural disasters. Our results indicate that approximately 26.7% of spring precipitation events in NEC demonstrate a dipole pattern—characterized by contrasting precipitation distributions within the region—that is significantly influenced by low-pressure systems. Our analysis reveals a strong connection between these precipitation patterns and the preceding winter's sea ice conditions in the Kara Sea. Reduced sea ice leads to a decrease in Ural Mountain snow cover, lower surface albedo, and an increase in upward heat flux, thereby warming the lower atmosphere. This process weakens the meridional temperature gradient, slows the westerly jet stream, and intensifies cyclogenesis over NEC. Moreover, persistent anomalies in sea ice and snow cover drive the eastward movement of Rossby waves, shaping the “− + −” Eurasian teleconnection pattern that intensifies regional low-pressure systems. Consequently, these circulation patterns result in increased precipitation in northern NEC and decreased precipitation in the south. Additionally, numerical experiments using the CAM6.0 and LBM model were conducted to investigate the atmospheric response to sea ice loss and the subsequent dynamical mechanisms affecting precipitation in NEC. Therefore, variations in Kara Sea ice and Eurasia snow cover serve as predictive indicators for NEC's spring precipitation pattern, thereby enhancing our understanding of NEC's precipitation dynamics and providing vital insights for predicting and managing regional natural disasters.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108829"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The multi-scale insights into summer ozone sources and their impacts on maize yield over the North China Plain","authors":"Huiyun Du ,&nbsp;Jie Li ,&nbsp;Wenyi Yang ,&nbsp;Yihua Mi ,&nbsp;Zixi Wang ,&nbsp;Xueshun Chen ,&nbsp;Zhe Wang ,&nbsp;Yele Sun ,&nbsp;Zifa Wang","doi":"10.1016/j.atmosres.2026.108833","DOIUrl":"10.1016/j.atmosres.2026.108833","url":null,"abstract":"<div><div>The North China Plain (NCP) faced severe summer ozone pollution in 2023, exacerbating risks to public health and crop yield. Accurate county-level ozone source attribution is essential for precise air quality management, yet conventional city-scale source modeling often overlooks heterogeneity in intra-urban contributions. Here, the Nested Air Quality Prediction Modeling System (NAQPMS), coupled with an online tracer-tagging module, was employed to quantify ozone sources and crop impacts, successfully reproducing spatiotemporal ozone variations across the NCP. The results showed that regional transport dominated summer ozone formation; emissions within 200 km contributed 43%–49% to the site-averaged maximum daily 8-h average (MDA8) O₃, rising to 77%–91% at the 800 km scale. Local priority control zones shifted substantially when evaluated against site-average, site-maximum, and maximum population-weighted metrics. Notably, Beijing's maximum noontime ozone peaks (MNP) differ distinctly from MDA8 O₃: local emissions contribute 44% to MNP versus 26% to MDA8 O₃, whereas 200–500 km transport dominates MNP in Zhengzhou and 500–800 km transport in Shijiazhuang, reflecting intensified midday photochemistry and precursor transport. Furthermore, AOT40-based assessments estimate 21% relative maize yield losses (RYL) across the NCP, primarily attributable to regional transport. In Beijing, local emissions contribute 22% to maize RYL, with urban sources accounting for 26% of local emission-induced RYL. These findings underscore the need for coordinated regional controls to curb long-range ozone transport alongside localized precision interventions, providing a scientific basis for integrated air quality and agricultural management.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108833"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Doubling frequency of summer cold surges in recent decades and their impact on East Asian extreme precipitation","authors":"Kwang-Hee Han ,&nbsp;Jee-Hoon Jeong ,&nbsp;Sung-Ho Woo ,&nbsp;Ho-Young Ku ,&nbsp;Hayeon Noh ,&nbsp;Baek-Min Kim","doi":"10.1016/j.atmosres.2026.108836","DOIUrl":"10.1016/j.atmosres.2026.108836","url":null,"abstract":"<div><div>This research highlights the role of the summertime southward intrusion of the Siberian air mass in intensifying extreme precipitation over East Asia. We identify a recurrent cold-core anticyclone over Siberia termed the Summer Siberian High (SSH) and define its southward expansion as the Summer Cold Surge (SCS). Our analysis reveals that the frequency of SCS events has nearly doubled since the early 2000s. This increase is attributed to a regime shift in the precursor circulation, characterized by the intensification of thermally enhanced, quasi-stationary anticyclones over the Ural Mountains. Dynamically analogous to the winter cold surge, the SCS transports cold and dry air into East Asia. The interaction between this cold intrusion and the warm, moist flow from the Western North Pacific Subtropical High enhances low-level baroclinicity and frontal convergence, thereby intensifying heavy rainfall. These findings underscore the growing climatological importance of high-latitude systems during summer and suggest that understanding SCS dynamics is crucial for predicting extreme precipitation in a warming climate.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108836"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyses of water vapor transport during heavy rainfalls associated with binary tropical cyclones Lupit (2109) and Mirinae (2110) from both Eulerian and Lagrangian viewpoints","authors":"Zuao Zhang ,&nbsp;Jie Cao ,&nbsp;Jing Liu ,&nbsp;Deqiang Liu","doi":"10.1016/j.atmosres.2026.108820","DOIUrl":"10.1016/j.atmosres.2026.108820","url":null,"abstract":"<div><div>Based on in-situ precipitation observations, ERA5 reanalysis, and GDAS datasets, this study investigates water vapor transport and multiscale convergence characteristics during a typhoon-induced heavy rainfall (TIHR) event impacted by the binary tropical cyclones (BTCs) Lupit (2109) and Mirinae (2110) in eastern Fujian, China, from 5 to 6 August 2021. Under the control of the subtropical high, BTCs move slowly, and the southwest monsoon provides abundant water vapor for both BTCs and the heavy rainfall area. Based on methods from both Eulerian and Lagrangian viewpoints, the multi-scale characteristics of water vapor transport at three different stages during the prolonged maintenance of Lupit are quantitatively analyzed and compared. It is found out that the evolution of water vapor distributions clearly reveals the possible dominant reasons for the intensity and location of remote precipitations. The southwest monsoon serves as the primary moisture source, with its transport pathways strongly modulated by the relative positioning of the BTCs. Lupit plays a dominant role in guiding moisture into the precipitating area, whereas Mirinae, although geographically nearby, is located downstream and contributes limited moisture transport to Lupit and the remote precipitation. Decomposition of water vapor flux divergence shows that that the moisture advection by divergent winds (Qv_S) provides a more accurate indication of rainfall centers than the total water vapor flux divergence (Qv_all) poorly, particularly under the influence of complex terrain and multiple interacting systems. Furthermore, HYSPLIT trajectory analysis confirms that two branches of southwest monsoon water vapor transport contribute 78.74% of the total water vapor, while the direct contribution from Mirinae accounted for only 6.56%. These findings underscore the critical role of cyclone-relative positioning in shaping moisture pathways and remote precipitating intensities, thereby may help to better understand the complicated physical mechanisms of moisture transport in rainstorms impacted by BTCs and other atmospheric systems.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108820"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intercomparison and sensitivity analysis of WRF parameterization schemes for convection-permitting modeling of precipitation distribution along the Yarlung Zangbo River","authors":"Qingyun Bian ,&nbsp;Shu Wang ,&nbsp;Heng Yang ,&nbsp;Hui Zheng","doi":"10.1016/j.atmosres.2026.108827","DOIUrl":"10.1016/j.atmosres.2026.108827","url":null,"abstract":"<div><div>Convection-permitting simulations offer a promising approach for improving precipitation estimation in complex terrain, yet their added value and sensitivity to parameterizations remain poorly understood in the Yarlung Zangbo River basin. This study systematically intercompares fifteen 3-km WRF simulations to examine how parameterization choices (radiation, cloud microphysics, planetary boundary layer, shallow convection, and orographic drag) influence precipitation characteristics critical for hydrological applications: intensity, duration, frequency (IDF), maxima, and diurnal cycles. Results indicate that convection-permitting simulations add clear value by mitigating the “drizzle bias” typical of coarse-resolution models and by producing higher-intensity, shorter-duration events that better reflect the region's convective nature. While higher resolution improves event structure, the accuracy of mean precipitation depends strongly on parameterization. Sensitivity analysis reveals that cloud microphysics schemes primarily govern intensity, duration, and the timing of the diurnal peak, with the Thompson scheme best reproducing the nighttime peak observed in near-normal years. The planetary boundary layer scheme dominates precipitation frequency, with the MYNN2 scheme demonstrating robust performance across interannual variability. Comparisons with a convolutional neural network-based product and coarse-resolution reanalyses indicate that dynamical downscaling is more robust across interannual variability (dry versus wet years). Despite substantial uncertainty among satellite observational products, these findings show that optimized convection-permitting models capture realistic valley-scale gradients and diurnal propagation, providing essential guidance for hydrological modeling in complex terrain.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108827"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drought as a risk amplifier: The intensifying regime of compound dry-hot events in China","authors":"Pengcheng Xu ,&nbsp;Dong Wang ,&nbsp;Yuankun Wang ,&nbsp;Vijay P. Singh ,&nbsp;Jianchun Qiu ,&nbsp;Xiaolei Fu","doi":"10.1016/j.atmosres.2026.108825","DOIUrl":"10.1016/j.atmosres.2026.108825","url":null,"abstract":"<div><div>Compound dry-hot events (CDH) are escalating climate hazards in China. This study examines spatiotemporal changes in the frequency, duration, dryness severity, and extreme heat characteristics of CDH using high-resolution daily data, including the Standardized Precipitation Evapotranspiration Index (SPEI) and daily maximum temperatures, from 1962 to 2022. Using high-resolution daily data (1962–2022) and a conditional Copula-based framework to calculate a risk amplification ratio (RAR), we analyzed daily CDH events nationwide. Our key results show: (1) a significant increase in the frequency and spatial extent of drought-related heatwaves, especially in recent decades; (2) intensifying CDH events, with annual durations extending by 1.8–3.6 days and severity rising by 2–9 units per event; and (3) drought amplifying concurrent heatwave risks by 3–7 times across most regions, which underscored regionally amplified impacts, particularly in China's arid regions, largely driven by anthropogenic climate change. The analysis, further validated by employing two distinct data products, indicates that background aridity critically modulates both CDH spatiotemporal characteristics and the magnitude of drought-induced heatwave risk amplification. By leveraging daily-scale data and a novel probabilistic framework, this research enhances the mechanistic understanding of compound event dynamics and underscores the necessity of accounting for drought as a key triggering factor in climate risk assessments.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108825"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupled influence of Western Pacific moisture anomalies and mid-tropospheric humidity on October precipitation in Yunnan Province Southwest China","authors":"Wen-Jun Sun ,&nbsp;Zhen-Peng Tao ,&nbsp;Zi-Yang Zhang ,&nbsp;Tian-Qing Lan ,&nbsp;Taohui Li ,&nbsp;Peng Zi ,&nbsp;Jian Zhang ,&nbsp;Yao Wu ,&nbsp;Ming-Qiang Liang ,&nbsp;Chao-Jun Chen ,&nbsp;Yuan-Yuan Mu ,&nbsp;Jun-Yun Li ,&nbsp;Ting-Yong Li","doi":"10.1016/j.atmosres.2026.108830","DOIUrl":"10.1016/j.atmosres.2026.108830","url":null,"abstract":"<div><div>In the Asian monsoon region, October marks the transition from the wet to the dry season, during which precipitation variability plays a crucial role in regional water management and ecological stability. In recent decades, intensified climate warming has led to more frequent extreme precipitation events across Southwest China, posing substantial challenges to agriculture and economic development in the rain-fed Yunnan Province. Using long-term surface observations and ERA5 reanalysis data from 1961 to 2024, this study applies statistical and diagnostic analyses to identify the dominant physical drivers of October precipitation variability in Yunnan. The results show that the Western Tropical Pacific Moisture Anomaly Index (WTPAI) and mid-tropospheric relative humidity (RH) jointly regulate interannual precipitation changes. The positive influence of WTPAI on precipitation is subject to a humidity threshold near 49%, indicating that moisture anomalies amplify precipitation only under sufficiently moist conditions. Furthermore, the Western Pacific Subtropical High (WPSH) primarily modulates WTPAI through its ridge position, linking large-scale circulation to regional moisture supply. Based on these findings, a “humidity threshold plus regional moisture anomaly” framework is proposed to describe the synergistic amplification mechanism between humidity and moisture transport. This framework clarifies the dynamic–thermodynamic coupling processes controlling autumn precipitation over Yunnan and provides a scientific basis for improved precipitation attribution, prediction, and water resource management under a warming climate.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"336 ","pages":"Article 108830"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of model performance in simulating extreme precipitation indices over eastern China: A comparison of CORDEX and NEX-GDDP models","authors":"Honglin Yu ,&nbsp;Shuping Li ,&nbsp;Siyi Wang ,&nbsp;Wenping He","doi":"10.1016/j.atmosres.2026.108760","DOIUrl":"10.1016/j.atmosres.2026.108760","url":null,"abstract":"<div><div>Coarse-resolution global climate models (GCMs) have limited capability to simulate mean and extreme precipitation over eastern China, thus requiring the use of downscaling techniques to improve model performance. This study evaluates two types of downscaled climate models: regional climate models (RCMs) from the Coordinated Regional Downscaling Experiment Phase II for East Asia (CORDEX), which use a dynamical downscaling approach, and the NASA Earth Exchange Global Daily Downscaled Projections (NEX-GDDP, NEX), which apply a statistical downscaling method. CORDEX and NEX models are driven by CMIP5 and CMIP6 GCM outputs, respectively. For all precipitation indices (PRCPTOT, R95p, R99p, Rx5day, CWD, and SDII), the CORDEX ensemble mean marginally improves their representation south of 30°N compared to CMIP5. Among the four model groups, NEX models achieve the highest skill in reproducing PRCPTOT over eastern China. However, CORDEX models outperform NEX models in simulating extreme precipitation events, with NEX models systematically underestimating extremes, indicating that dynamical downscaling is generally more effective than statistical downscaling for capturing extreme precipitation. Both CORDEX and NEX models successfully capture the timing and peak of the annual precipitation cycle over eastern China, despite notable inter-model discrepancies. These results provide a comprehensive reference for selecting appropriate models to project mean and extreme precipitation over eastern China.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"335 ","pages":"Article 108760"},"PeriodicalIF":4.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145961776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How Saharan dust and elevated convection can produce negative dipole charge structure ?","authors":"Gabriel Hausknost ,&nbsp;Sylvain Coquillat ,&nbsp;Dominique Lambert ,&nbsp;Stéphane Pédeboy ,&nbsp;Pierre de Guibert ,&nbsp;Eric Gonneau","doi":"10.1016/j.atmosres.2026.108783","DOIUrl":"10.1016/j.atmosres.2026.108783","url":null,"abstract":"<div><div>The LMA network SAETTA has observed thunderstorms from 2014 to 2023. During this period, 54 thunderstorm days with negative dipole charge structures were observed during African dust flow events over the Corsica island, mainly during the warm season. The spatial and temporal distribution of thunderstorm days provided by SAETTA data shows nocturnal events with negative dipole charge structure, without preferential regions (even on land and on sea), while classic thunderstorms over Corsica with normal tripole charge structure occur mainly over mountains in the daytime. In the case of negative dipole events, METEORAGE data show more intense and frequent +CG lightning flashes than classical thunderstorms, and 89.4% of -IC lightning flashes. Furthermore, ERA-5,reanalysis data and radiosonde data exhibit dry and warm low layers, with a temperature inversion near the surface, forcing the triggering of elevated convection. This observation could be a consequence of the radiative impact of Saharan dust. This study shows no evidence for the microphysical impact of aerosols, i.e. the multiplication of ice crystals despite supercooled water droplets. Meteorological data also exhibit intense wind speeds associated with negative dipole thunderstorms.</div></div>","PeriodicalId":8600,"journal":{"name":"Atmospheric Research","volume":"335 ","pages":"Article 108783"},"PeriodicalIF":4.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}