Geophysical Research Letters最新文献_第2页

Why Does the Norwegian Sea-Barents Sea Region Have the Smallest Amount of Stratocumulus in Summer? 为什么挪威海-巴伦支海地区夏季层积云最少？

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116907

Ru Zhou, Yunyin Li, Zhiwei Zhang, Lei Zhu, Naifu Shao, Wenrong Bai, Chen Zhou, Chunsong Lu, Mengyu Huang, Ping Tian

{"title":"Why Does the Norwegian Sea-Barents Sea Region Have the Smallest Amount of Stratocumulus in Summer?","authors":"Ru Zhou, Yunyin Li, Zhiwei Zhang, Lei Zhu, Naifu Shao, Wenrong Bai, Chen Zhou, Chunsong Lu, Mengyu Huang, Ping Tian","doi":"10.1029/2025GL116907","DOIUrl":"10.1029/2025GL116907","url":null,"abstract":"The melting of sea ice in the Arctic has sparked research into how clouds form in exposed ice-free zones. This study delves into the seasonal distribution of stratocumulus clouds over the Norwegian Sea-Barents Sea region and presents a conceptual model for the underlying mechanisms. In spring, autumn, and winter, increased surface water vapor flux provides water vapor from the sea surface. Concurrently, warm air enters the area through the southwest wind of the Norwegian Strait. Under conditions of unstable stratification, the water vapor is lifted to the condensation level, promoting the formation of stratocumulus clouds. Conversely, in summer, evaporation is suppressed due to stable stratification, which hinders vertical vapor transport. Enhanced dry advection reduces the transport of water vapor, leading to a decrease in the amount of stratocumulus clouds during summer. This research enriches our understanding of the physical mechanisms influencing cloud formation and cloud-climate feedbacks in the Arctic region.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116907","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Response of Early Winter Precipitation and Storm Activity in the North Atlantic–European–Mediterranean Region to Indian Ocean SST Variability 北大西洋-欧洲-地中海地区初冬降水和风暴活动对印度洋海温变率的响应

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116732

M. Reale, A. Raganato, F. D'Andrea, M. Adnan Abid, A. Hochman, N. R. Chowdhury, S. Salon, F. Kucharski

{"title":"Response of Early Winter Precipitation and Storm Activity in the North Atlantic–European–Mediterranean Region to Indian Ocean SST Variability","authors":"M. Reale, A. Raganato, F. D'Andrea, M. Adnan Abid, A. Hochman, N. R. Chowdhury, S. Salon, F. Kucharski","doi":"10.1029/2025GL116732","DOIUrl":"10.1029/2025GL116732","url":null,"abstract":"We investigate the response of winter precipitation and storm activity in the North Atlantic–European–Mediterranean region (NAEM) to the Indian Ocean Dipole (IOD) from 1979 to 2024. We observe a positive NAO-like pattern over NAEM, which appears in December and shifts eastward through February. IOD further modulates precipitation by inducing changes in total precipitation, event frequency, and wet spell duration. The strength of the observed teleconnection is primarily significant in December. Additionally, we observe a reduction in cyclone activity in December over the East Atlantic and Western Mediterranean. These changes in cyclone track density are primarily driven by variations in the Eady Growth Rate, which are linked to enhanced vertical wind shear associated with a strengthened meridional temperature gradient over the NAEM. The results underscore a significant remote impact of the IOD on early winter hydro-climate variability over the NAEM region, offering a potential value for improving sub-seasonal to seasonal prediction.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116732","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping Basin Interfaces Using Single-Station Cross-Component Correlations: Application to the Central Vienna Basin (Austria) 利用单站交叉分量相关性绘制盆地界面：在维也纳中部盆地（奥地利）的应用

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116888

C. Esteve, Y. Lu, G. Bokelmann

引用次数: 0

Magnetic Flux Ropes at Mars and Their Impacts on Heavy Ion Escape 火星磁通量绳及其对重离子逸出的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116027

Jinqiao Fan, Yasong S. Ge, Can Huang, Aimin Du, Xiaohua Fang, Tielong Zhang, Yingjuan Ma, Lei Wang, Ziyong Liu

{"title":"Magnetic Flux Ropes at Mars and Their Impacts on Heavy Ion Escape","authors":"Jinqiao Fan, Yasong S. Ge, Can Huang, Aimin Du, Xiaohua Fang, Tielong Zhang, Yingjuan Ma, Lei Wang, Ziyong Liu","doi":"10.1029/2025GL116027","DOIUrl":"10.1029/2025GL116027","url":null,"abstract":"Flux ropes (FRs), ubiquitous helical magnetic structures in solar system plasmas, are important to energy and particle transport. At Mars, where global intrinsic magnetic fields are absent, FRs form through magnetic reconnection (MR) and magnetospheric or ionospheric boundary wave instabilities (BWIs), but their role in ion escape remains controversial. Here, we first present the global distribution of MR- and BWI-FRs from Martian ionosphere to magnetosheath, utilizing 4,012 FR events identified from 5-year observations by the Mars Atmosphere and Volatile EvolutioN (MAVEN) satellite. We find that the global occurrence rate of FRs associated with BWIs is comparable with those from MR. Enhanced oxygen ion outflow fluxes and densities within most nightside BWI-FRs suggest they predominantly originate from the dayside ionosphere/magnetosphere. These BWI-FRs have sufficient magnetic field intensity to carry oxygen ions beyond escape energies, suggesting their potential role in facilitating global ion escape from Mars via magnetotail transport.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prevailing Climate Patterns for Concurrent High Temperature and Low Precipitation Days in Canada 加拿大同期高温少降水日的主要气候模式

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL118662

Chandra Rupa Rajulapati, Alex Crawford, Simon Michael Papalexiou, Julienne Stroeve

{"title":"Prevailing Climate Patterns for Concurrent High Temperature and Low Precipitation Days in Canada","authors":"Chandra Rupa Rajulapati, Alex Crawford, Simon Michael Papalexiou, Julienne Stroeve","doi":"10.1029/2025GL118662","DOIUrl":"10.1029/2025GL118662","url":null,"abstract":"In this work, we evaluated the changing frequency of concurrent daily High Temperature and Low Precipitation (HTLP) and its relationship with large-scale climate patterns across Canada. Our analysis showed a significant increase (up to 3 days/decade) in the Canadian Arctic and southern regions of British Columbia and an insignificant decrease in HTLP frequency in the Prairies of Saskatchewan and Manitoba during 1979–2018. We examined ten large-scale climate patterns influencing precipitation and temperature in Canada. Among these, four climate indices (the East Pacific-North Pacific Pattern, North Atlantic Oscillation, Oceanic Niño Index, and East Atlantic Pattern) were noted as significant influencers of HTLP frequency, ranked in descending order of influence. Our research holds significance in explaining the spatial dynamics of HTLP days and the role of large-scale climate patterns therein, providing valuable insights for future research on heatwaves and droughts, mitigation efforts, and policy changes tailored to vulnerable regions.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL118662","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-Year Ice Dynamics at Køge Bugt Central Glacier Controlled by Bed Topography 床地形控制下Køge Bugt中央冰川多年冰动力

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116829

H. J. Picton, P. W. Nienow

引用次数: 0

ENSO Diversity Explains Interannual Variability of the Pattern Effect ENSO多样性解释了模式效应的年际变化

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116952

Robin Guillaume-Castel, Paulo Ceppi, Joshua Dorrington, Benoit Meyssignac

引用次数: 0

Possible Mechanisms for the Record-Breaking Persistent Extreme Rainfall Event Over Southern China in April 2024: Synergistic Effects of Multiscale Systems 2024年4月中国南方破纪录持续极端降雨事件的可能机制：多尺度系统的协同效应

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL116189

Wenqi Pan, Jianqi Sun, Jiehua Ma

{"title":"Possible Mechanisms for the Record-Breaking Persistent Extreme Rainfall Event Over Southern China in April 2024: Synergistic Effects of Multiscale Systems","authors":"Wenqi Pan, Jianqi Sun, Jiehua Ma","doi":"10.1029/2025GL116189","DOIUrl":"10.1029/2025GL116189","url":null,"abstract":"In April 2024, southern China suffered a record-breaking persistent extreme rainfall event (PERE), affecting 1.60 million people and causing direct economic losses of 11.98 billion RMB. This study reveals the synergistic effects of sea surface temperature (SST) and intraseasonal atmospheric circulation. Positive SST anomalies in tropical Indian Ocean (TIO) strengthen the western Pacific subtropical high (WPSH) via Gill-type response (basical theory describing the atmospheric response to external forces such as tropical SST), enhancing moisture transport to southern China. The 10–30-day intraseasonal oscillation (ISO) along the subtropical westerly jet initiates the event by inducing a low-pressure and ascending motion over southern China. The 30–90-day ISO along the polar front jet sustains the event by intensifying East Asian westerly jet and maintaining ascending motion over southern China. Furthermore, North Atlantic SST anomalies enhance North Atlantic jet stream, promoting downstream propagation of intraseasonal wave trains via energy conversion.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-Term Trends of Ionospheric Day-to-Day Variability During the Past Century 过去一个世纪电离层逐日变化的长期趋势

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL118640

Xu Zhou, Wenbo Li, Huixin Liu, Lianhuan Hu, Yi Li, Xinan Yue

{"title":"Long-Term Trends of Ionospheric Day-to-Day Variability During the Past Century","authors":"Xu Zhou, Wenbo Li, Huixin Liu, Lianhuan Hu, Yi Li, Xinan Yue","doi":"10.1029/2025GL118640","DOIUrl":"10.1029/2025GL118640","url":null,"abstract":"In this study, we explore the long-term trend of ionospheric day-to-day variability induced by atmospheric perturbations over the past century, using time-slice simulations by the whole atmospheric model. The main results show that the magnitude of the trends in the past century maximizes ∼±1% of the seasonal mean per decade. Analysis of the contributing factors reveals that geomagnetic secular variation primarily contributes to the trends over the American-Atlantic sector, while increasing greenhouse gases (GHG) explain most trend patterns over the Asia-Pacific region. Additional evidence by Wuhan ionosonde observations covering the period of 1947–2024, supports the simulated negative trend, and the magnitude agrees well with the simulations. Furthermore, our analysis of atmospheric tides revealed that the weakening of SE2 day-to-day variability due to increasing GHG levels is a plausible cause. Our findings thus indicate that ionospheric weather-like variability also undergoes long-term trends significantly under the climate change scenario.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 20","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL118640","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Soil Moisture on Surface Air Temperature in Monsoons 季风期土壤水分对地表气温的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2025-10-16 DOI: 10.1029/2025GL115760

Yuhei Takaya, Naresh G. Ganeshi, Yu Kosaka, X. San Liang, Tomonori Sato

引用次数: 0