期刊文献+
共找到81,391篇文章
< 1 2 250 >
每页显示 20 50 100
Stress triggering effect on the 2022 Honghe M_(S)5.0 earthquake with historical strong earthquakes
1
作者 Mingce Wang Zifeng Liu Ruijie Luo 《Geodesy and Geodynamics》 EI CSCD 2024年第2期107-113,共7页
The 2022 Honghe M_(S)5.0 seismic event is intriguing due to its occurrence in the south of the Red River Fault,an area historically lacking seismic activities greater than M_(S)5.0.To elucidate the seismogenic mechani... The 2022 Honghe M_(S)5.0 seismic event is intriguing due to its occurrence in the south of the Red River Fault,an area historically lacking seismic activities greater than M_(S)5.0.To elucidate the seismogenic mechanism and scrutinize stress-triggered interactions,we calculated co-seismic and post-seismic Coulomb stress alterations induced by nine historical seismic events(M≥6.0).The analysis reveals that these substantial seismic events provoked co-seismic stress augmentations of 1.409 bar and postseismic stress increments of 0.159 bar.Noteworthy seismic events,such as the 1833 Songming,1877Shiping,1913 Eshan,and 1970 Tonghai earthquakes,catalyzed the occurrence of the Honghe earthquake.Areas of heightened future seismic risk include the southern region of the Red River Fault and the eastern segments of the Shiping-Jianshui and Qujiang faults.Additionally,we assessed the correlation between the spatial distribution of aftershocks and the Coulomb stress shift triggered by the mainshock,taking into account the influence of calculation parameter settings. 展开更多
关键词 Honghe Ms5.0 earthquake Coulomb failurestress Stress triggering historical strongearthquakes
下载PDF
Heritage Communities in Consumer Contexts Spatial Production of Tourism Research-Take Qixian Zhao Yu Historical City as an Example
2
作者 BAI Zhao-yi ZHU Jun-jie WEN Jia-hao 《Journal of Literature and Art Studies》 2024年第1期95-108,共14页
Taking Zhaoyu Historical City in Qixian County as an example,this paper explores the production process of tourism space in Zhaoyu Historical City in the context of consumption,based on Lefebvre's triadic dialecti... Taking Zhaoyu Historical City in Qixian County as an example,this paper explores the production process of tourism space in Zhaoyu Historical City in the context of consumption,based on Lefebvre's triadic dialectic theory.The study reveals that,driven by the development of tourism,subjects such as the government and planners possess absolute dominance over spatial representations,while residents demonstrate receptive and adaptive action strategies and social relations are reproduced,presenting a harmonious state.Further exploring the tourism community in the environmental performance of the subject of action,social relations,consumption demand,daily life practice,cultural capital,etc.,the daily life practice of the tourism community has transcended the original logic of tourism spatial production and has a certain extension.The mechanism analysis in this paper can help guide the healthy development of tourism space in the neighboring historical cities or communities and achieve the dual purpose of promoting the economic development of the community and heritage protection. 展开更多
关键词 spatial production theory tourism space consumption context heritage community ZhaoYu historical City
下载PDF
解铃须从系铃处——Records与Archives概念正史(二)
3
作者 王岚 《档案管理》 北大核心 2024年第1期28-35,共8页
笔者的“四正”,从名分、本义、学理、法律上已弄清Records的含义,但坚持“Records文件观”者依旧质疑:若Records是档案,那Archives是什么?两者并列时又怎么翻译?还有人说Records是记录。既然是英语和法语带来的问题,循着英法档案历史... 笔者的“四正”,从名分、本义、学理、法律上已弄清Records的含义,但坚持“Records文件观”者依旧质疑:若Records是档案,那Archives是什么?两者并列时又怎么翻译?还有人说Records是记录。既然是英语和法语带来的问题,循着英法档案历史去寻找,才是解铃的关键:以英法八百年档案工作中重要人物和事件为主线,探求其档案的源流、本质、内含及演变,为档案概念正史。 展开更多
关键词 卷档 录卷归档 档案 皇家档案 馆藏档案 现行档案 概念 历史
下载PDF
Relationship between earthquake and volcanic eruption inferred from historical records 被引量:3
4
作者 陈洪洲 高峰 +1 位作者 吴雪娟 孟宪森 《地震学报》 CSCD 北大核心 2004年第4期448-453,510,共6页
史料记载表明,五大连池火山1720~1721年喷发期间有大量地震活动.本文从描述这些地震活动的文字记录人手,并结合国际火山地震研究的新成果,探讨了地震类型及地震与火山喷发关系,指出震群是火山喷发的重要前兆指标,强调火山地震的... 史料记载表明,五大连池火山1720~1721年喷发期间有大量地震活动.本文从描述这些地震活动的文字记录人手,并结合国际火山地震研究的新成果,探讨了地震类型及地震与火山喷发关系,指出震群是火山喷发的重要前兆指标,强调火山地震的监测对火山喷发预报的意义. 展开更多
关键词 历史记录 火山地震 火山喷发 五大连池火山
下载PDF
Relationship between earthquake and volcanic eruption inferred from historical records 被引量:1
5
作者 CHEN Hong-zhou(陈洪洲) +5 位作者 GAO Feng(高峰) WU Xue-juan(吴雪娟) MENG Xian-sen(孟宪森) 《Acta Seismologica Sinica(English Edition)》 CSCD 2004年第4期500-506,共7页
A large number of seismic records are discovered for the first time in the historical materials about Wudalianchi volcanic group eruption in 1720~1721, which provides us with abundant volcanic earthquake information.... A large number of seismic records are discovered for the first time in the historical materials about Wudalianchi volcanic group eruption in 1720~1721, which provides us with abundant volcanic earthquake information. Based on the written records, the relationship between earthquake and volcanic eruption is discussed in the paper. Furthermore it is pointed that earthquake swarm is an important indication of volcanic eruption. Therefore, monitoring volcanic earthquakes is of great significance for forecasting volcanic eruption. 展开更多
关键词 historical record VOLCANIC EARTHQUAKE VOLCANIC ERUPTION WUDALIANCHI VOLCANIC group
下载PDF
Historical records and the sources of polycyclic aromatic hydrocarbons in the East China Sea 被引量:2
6
作者 Xiao-yong Duan Yan-xia Li +1 位作者 Xian-guo Li Ping Yin 《China Geology》 2018年第4期505-511,共7页
The coastal cities are the most advanced regions in China.In the past few decades,the environment changed very significantly due to large scale human activities in the coastal regions.Polycyclic aromatic hydrocarbons ... The coastal cities are the most advanced regions in China.In the past few decades,the environment changed very significantly due to large scale human activities in the coastal regions.Polycyclic aromatic hydrocarbons (PAHs)in three dated sediment cores from the west coast of the Yellow Sea (core A01),the Yangtze River estuary (YRE;core A02)and the Oujiang River estuary (ORE;core A03)were analyzed to reconstruct the environmental evolutionary process of the east China coastal region over the past century. In the three cores,PAHs concentrations were increased rapidly.Lower concentrations of PAHs were measured in core A02 than in cores A01 and A03.The vertical variation of PAHs in the YRE Was dominated by the petrogenic sources.Historical records of PAHs in the ORE were controlled by pyrolytic sources.PAHs on the west coast of the Yellow Sea were contributed by the two sources. 展开更多
关键词 POLYCYCLIC AROMATIC hydrocarbons East China Sea COASTAL sediment Source DEPOSITIONAL record
下载PDF
Test Calibration of the Paleoclimatic Proxy Data with Chinese Historical Records
7
作者 De'er Zhang 《Advances in Climate Change Research》 SCIE 2011年第1期38-42,共5页
古气候代理的刻度目前是在古气候的学习的关键问题之一。气候的历史的记录片记录对在 climatological 意义标明日期和代理数据的气候的含意上的刻度合适。用中国历史的记录片记录改正 Delingha 树戒指降水系列上的测试刻度在 14011950 ... 古气候代理的刻度目前是在古气候的学习的关键问题之一。气候的历史的记录片记录对在 climatological 意义标明日期和代理数据的气候的含意上的刻度合适。用中国历史的记录片记录改正 Delingha 树戒指降水系列上的测试刻度在 14011950 广告在 44 个极端干燥盒子之中显示出那, 42 个盒子(或 95.5%) 是可信的。因此 Delingha 表示戒指的降水的长系列是高度可靠的。用历史的记录基于 Zhanjiang Huguangyan 沉积验证季风紧张代理数据的另一测试显示马尔·蒂湖的年满足季风紧张在完全对面到在 800900 广告的严厉冬季的历史的描绘文件的年的指明系列的冬季。作为结果,严肃的疑问关于这个 paleo 季风代理系列的气候的含意被提起。引证张, D. , 2011:与中国历史的记录测试 paleoclimatic 代理数据的刻度。副词。Clim。变化物件, 2 (1 ) , doi:10.3724/SP .J.1248.2011.00038。 展开更多
关键词 测试标定 历史记录 古气候 历史文献记录 代用 气候意义 季风强度 降水序列
下载PDF
The Historical Fiction Based on True Stories:An Analysis of the Menghui Gushu by Huang Jianhua with the Aid of Historical Records and Archaeological Objects of Art
8
作者 Tang Lin 《Contemporary Social Sciences》 2022年第2期77-90,共14页
The Gushu Chuanqi[Legend of Ancient Shu]trilogy is historically grounded,although it is largely fictional.Five characteristics of the society represented in the trilogy,i.e.,walled cities,sacred statues,silk fabrics,b... The Gushu Chuanqi[Legend of Ancient Shu]trilogy is historically grounded,although it is largely fictional.Five characteristics of the society represented in the trilogy,i.e.,walled cities,sacred statues,silk fabrics,burials,and pottery,were examined with the aid of related historical records and archaeological objects of art unearthed in Sichuan.This paper made a comparative study of these things with their respective textual descriptions in the Menghui Gushu[Ancient Shu Revisited in the Dream],the first volume of the Gushu Chuanqi[Legend of Ancient Shu]trilogy by Huang Jianhua.The results support the assertion that the trilogy is not a free interpretation of history but historical fiction based on true stories. 展开更多
关键词 ancient Shu/ancient Sichuan historical records archaeological objects of art comparative study
下载PDF
An Analysis on First Section of HistoricalRecords of King Trisong which from Tunhong Hidden Scriptures
9
作者 Sangyay Khar 《西藏大学学报(藏文版)》 2012年第1期16-28,共13页
关键词 赤松 圣经 隐藏 历史价值
下载PDF
The History of Controlling and Treating Infectious Diseases in Ancient China 被引量:1
10
作者 Cui-ling LIU Tao ZHOU +5 位作者 Liang-bin CHENG David FISHER Khrystyna PRONYUK Erkin MUSABAEV Yi-ping DANG Lei ZHAO 《Current Medical Science》 SCIE CAS 2024年第1期64-70,共7页
Infectious diseases are the common enemies of mankind.In the course of historical development,they persistently threaten human health and safety.Even today,despite the developments in medical science,we cannot escape ... Infectious diseases are the common enemies of mankind.In the course of historical development,they persistently threaten human health and safety.Even today,despite the developments in medical science,we cannot escape the fear and suffering caused by infectious diseases.Whether in ancient or modern times,the source of infection,route of transmission,and a susceptible population are the three key conditions for the prevalence and spread of infectious diseases.All factors closely related to these three conditions can affect the prevalence of infectious diseases.China is one of the cradles of world civilization.The ancient people accumulated a great deal of experience and lessons in the long struggle against infectious diseases.In the face of the current threat posed by widespread infectious disease,it is imperative to review and summarize ancient Chinese ideas and health policies on epidemic prevention and control to inspire contemporary efforts in the prevention and control of infectious disease.The combination of prevention-oriented epidemic prevention ideology and traditional medicine provides valuable insights,especially for impoverished and medically underserved regions. 展开更多
关键词 infectious diseases Chinese medicine public health historical review
下载PDF
档案术语对应词record和records的概念与运用再探
11
作者 李静 《档案管理》 北大核心 2023年第1期67-69,共3页
档案术语record和records的内涵和译法长期以来是档案界关注和讨论的焦点之一。本文从record和records的词源、定义和内涵入手,分析国内该术语存在的译名争议背后的原因,从中外档案管理工作的本质出发,提出record和records的具体译名应... 档案术语record和records的内涵和译法长期以来是档案界关注和讨论的焦点之一。本文从record和records的词源、定义和内涵入手,分析国内该术语存在的译名争议背后的原因,从中外档案管理工作的本质出发,提出record和records的具体译名应结合实际语境而定。 展开更多
关键词 档案 术语 文件 语境
下载PDF
The Arctic Sea Ice Thickness Change in CMIP6’s Historical Simulations
12
作者 Lanying CHEN Renhao WU +3 位作者 Qi SHU Chao MIN Qinghua YANG Bo HAN 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2023年第12期2331-2343,共13页
This study assesses sea ice thickness(SIT)from the historical run of the Coupled Model Inter-comparison Project Phase 6(CMIP6).The SIT reanalysis from the Pan-Arctic Ice Ocean Modeling and Assimilation System(PIOMAS)p... This study assesses sea ice thickness(SIT)from the historical run of the Coupled Model Inter-comparison Project Phase 6(CMIP6).The SIT reanalysis from the Pan-Arctic Ice Ocean Modeling and Assimilation System(PIOMAS)product is chosen as the validation reference data.Results show that most models can adequately reproduce the climatological mean,seasonal cycle,and long-term trend of Arctic Ocean SIT during 1979-2014,but significant inter-model spread exists.Differences in simulated SIT patterns among the CMIP6 models may be related to model resolution and sea ice model components.By comparing the climatological mean and trend for SIT among all models,the Arctic SIT change in different seas during 1979-2014 is evaluated.Under the scenario of historical radiative forcing,the Arctic SIT will probably exponentially decay at-18%(10 yr)-1 and plausibly reach its minimum(equilibrium)of 0.47 m since the 2070s. 展开更多
关键词 sea ice thickness Arctic Ocean climate change historical simulation CMIP6
下载PDF
Impacts of anisotropy coefficient and porosity on the thermal conductivity and P-wave velocity of calcarenites used as building materials of historical monuments in Morocco
13
作者 Abdelaali Rahmouni Abderrahim Boulanouar +6 位作者 Younes El Rhaffari Mohammed Hraita Aziz Zaroual Yves Géraud Jamal Sebbani Abdellah Rezzouk Bassem S.Nabawy 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2023年第7期1687-1699,共13页
It is essential to study the porosity,thermal conductivity,and P-wave velocity of calcarenites,as well as the anisotropy coefficients of the thermal conductivity and P-wave velocity,for civil engineering,and conservat... It is essential to study the porosity,thermal conductivity,and P-wave velocity of calcarenites,as well as the anisotropy coefficients of the thermal conductivity and P-wave velocity,for civil engineering,and conservation and restoration of historical monuments.This study focuses on measuring the thermal conductivity using the thermal conductivity scanning(TCS)technique and measuring the P-wave ve-locity using portable equipment.This was applied for some dry and saturated calcarenite samples in the horizontal and vertical directions(parallel and perpendicular to the bedding plane,respectively).The calcarenites were selected from some historical monuments in Morocco.These physical properties were measured in the laboratory to find a reliable relationship between all of these properties.As a result of the statistical analysis of the obtained data,excellent linear relationships were observed between the porosity and both the thermal conductivity and porosity.These relationships are characterized by relatively high coefficients of determination for the horizontal and vertical samples.Based on the thermal conductivity and P-wave velocity values in these two directions,the anisotropy coefficients of these two properties were calculated.The internal structure and the pore fabric of the calcarenite samples were delineated using scanning electron microscopy(SEM),while their chemical and mineral compositions were studied using the energy dispersive X-ray analysis(EDXA)and X-ray diffraction(XRD)techniques. 展开更多
关键词 Moroccan historical monuments Calcarenite Thermal conductivity P-wave velocity POROSITY Anisotropy coefficient Water saturation
下载PDF
Legacy effects of historical woodland changes on contemporary plant functional composition
14
作者 Ji-Zhong Wan Chun-Jing Wang 《Forest Ecosystems》 SCIE CSCD 2023年第5期569-578,共10页
Considering the legacy of plant functional composition can help assess ecosystem functions and ecosystem services across different spatial scales under land cover changes.Woody plants likely respond to natural and ant... Considering the legacy of plant functional composition can help assess ecosystem functions and ecosystem services across different spatial scales under land cover changes.Woody plants likely respond to natural and anthropogenic perturbations due to historical events(e.g.,agricultural development),thus contemporary plant functional composition may be explained by historical woodland change,a type of land cover change.We propose that historical woodland changes may have legacy effects on contemporary plant functional composition.Here,we used partial least squares regression and linear mixed model analyses to test this assumption by coupling data on community weighted means(CWM)and community weighted variance(CWV)of vegetation plots and calculating the time of woodland existence across different periods from AD 0 to 2017.We found that the legacy effects of historical land cover changes on CWM and CWV during the existence time of woodland,particularly from AD 0 to 900,were drivers of contemporary plant functional composition at large spatial scales.Furthermore,historical woodland changes can affect contemporary plant functional composition,depending on the biome type.Particularly,the CWM of plant height,seed mass,and seed length showed the strongest correlations with woodland changes from AD 1910 to 2010 in tropics with year-round rain,and the CWM of leaf traits correlated with woodland changes from AD 0 to 1700 in tropics with summer rain.Our study provides the effective evidence on the legacy of historical woodland changes and the effects on contemporary plant functional composition,which is crucial with respect to effective management of plant diversity and assessing ecosystem functions and services from local to global scales over time. 展开更多
关键词 BIOME Community weighted means Global scale historical woodland Land cover Plant functional trait
下载PDF
Protective Renovation of the Historical Environment of Traffic Cultural Heritage:Necessity and Feasibility
15
作者 DONG Lili LI Yueyan 《Journal of Landscape Research》 2023年第1期79-84,共6页
Starting from the reality of protective renovation of the historical environment of traffic cultural heritage,this paper discusses its necessity from the role and value of protective renovation of historical environme... Starting from the reality of protective renovation of the historical environment of traffic cultural heritage,this paper discusses its necessity from the role and value of protective renovation of historical environment on overall protection of traffic cultural heritage and contemporary value exploration.By analyzing the current research status of traffic history,protection theories and methods of historical environment,cultural routes,linear cultural landscape and heritage corridors and other theoretical methods,as well as the effectiveness of digital protection and other technical approaches,this paper demonstrates the theoretical basis and feasible technical approaches for protective renovation of the historical environment of traffic cultural heritage.Moreover,it is suggested to construct the historical environment evaluation system of traffic cultural heritage and form a systematic design process of protective renovation. 展开更多
关键词 Traffic cultural heritage historical environmental protection Renewal design Linear cultural landscape historical geographic information system
下载PDF
Deletion and Recovery Scheme of Electronic Health Records Based onMedical Certificate Blockchain
16
作者 Baowei Wang Neng Wang +2 位作者 Yuxiao Zhang Zenghui Xu Junhao Zhang 《Computers, Materials & Continua》 SCIE EI 2023年第7期849-859,共11页
The trusted sharing of Electronic Health Records(EHRs)can realize the efficient use of medical data resources.Generally speaking,EHRs are widely used in blockchain-based medical data platforms.EHRs are valuable privat... The trusted sharing of Electronic Health Records(EHRs)can realize the efficient use of medical data resources.Generally speaking,EHRs are widely used in blockchain-based medical data platforms.EHRs are valuable private assets of patients,and the ownership belongs to patients.While recent research has shown that patients can freely and effectively delete the EHRs stored in hospitals,it does not address the challenge of record sharing when patients revisit doctors.In order to solve this problem,this paper proposes a deletion and recovery scheme of EHRs based on Medical Certificate Blockchain.This paper uses cross-chain technology to connect the Medical Certificate Blockchain and the Hospital Blockchain to real-ize the recovery of deleted EHRs.At the same time,this paper uses the Medical Certificate Blockchain and the InterPlanetary File System(IPFS)to store Personal Health Records,which are generated by patients visiting different medical institutions.In addition,this paper also combines digital watermarking technology to ensure the authenticity of the restored electronic medical records.Under the combined effect of blockchain technology and digital watermarking,our proposal will not be affected by any other rights throughout the process.System analysis and security analysis illustrate the completeness and feasibility of the scheme. 展开更多
关键词 Electronic health records cross-chain medical certificate blockchain data deletion and recovery
下载PDF
Practice and Exploration of Experiential Theme Landscape Design in Urban Historic Blocks: A Case Study of Shengjin Tower Folk Custom Historical Block in Nanchang
17
作者 FANG Qianghua FANG Huan XI Xingzhou 《Journal of Landscape Research》 2023年第6期35-42,46,共9页
Urban historic blocks are an important part of urban public space,but urban public space pays far less attention to users’experience,and there is a lack of design problem of experiential theme landscape.The landscape... Urban historic blocks are an important part of urban public space,but urban public space pays far less attention to users’experience,and there is a lack of design problem of experiential theme landscape.The landscape design practice of Shengjin Tower Folk Custom Historical Block in Nanchang provides an attempt to explore the design problem of experiential theme landscape.In this paper,the results of the design practice were sorted out and summarized,and the specific conception of the experiential design of urban public space was discussed from three aspects of the experiential control design,spatial experience design and serial experience design of the historic block on the basis of elaborating the design concept,so as to provide inspiration and reference for similar urban historic block projects. 展开更多
关键词 Experiential design historic block LANDSCAPE Design practice
下载PDF
Pedestrian street and its effect on economic sustainability of a historical Middle Eastern city:The case of Chaharbagh Abbasi in Isfahan,Iran
18
作者 Soudabeh Shahmoradi Sayyed Mahdi Abtahi Pedro Guimaraes 《Geography and Sustainability》 CSCD 2023年第3期188-199,共12页
Pedestrianization is an urban revitalization strategy to enhance sustainability and livability in car-oriented cities.Despite many studies in this research field,the effects of pedestrianization on the economy of citi... Pedestrianization is an urban revitalization strategy to enhance sustainability and livability in car-oriented cities.Despite many studies in this research field,the effects of pedestrianization on the economy of cities in developing countries still need further investigation.Additionally,the impact of this strategy on the tenant mix of com-mercial and historical areas in Middle East countries is nebulous.To address these inadequacies,we considered Chaharbagh Abbasi street,located in the heart of Isfahan,Iran,and investigated the impact of a pedestrianization project with particular emphasis on how it affects the economic sustainability of existent commercial fabric.Pre-and post-project data along with field observations and quantifications used to assess structural replacements in trade,were analyzed with SPSS and ArcGIS software.The results revealed unexpected outcomes,such as the closure of some traditional businesses(27.5%),a stagnation in sales(69%)and a decrease in job offers(84%)leading the local economy to a fragile situation.Conversely,it was found that the footfall volume increased by 64% and 73% from the retailers’and pedestrians’viewpoints.This evolution along with a wide opening of food and beverage stores(approximately 60%)makes the post-pedestrianization results more promising than earlier predictions.In conclusion,these findings reinforce the importance of pedestrian streets in revitalizing economic activities in historical and commercial areas from the perspective of economic sustainability.Due to the lack of similar investigations in Middle East countries,these findings can support decision-makers and urban planners to take preventive measures in preserving the diversity of individual small shops for upcoming urban rehabilitation projects in terms of pedestrianization. 展开更多
关键词 Urban planning Pedestrianization Chaharbagh abbasi Sustainable Development Goals(SDGs) Economic sustainability historic city centers
下载PDF
records相关术语比较研究(摘编)
19
作者 吕文婷 《中国档案》 北大核心 2023年第3期70-70,共1页
文件生命周期(records lifecycle management)理论和文件连续体理论(records continuum theory)有一个共同的基础术语,即records,目前,我国的翻译中,较为普遍的观点是将documents、records译成“文件”,将archives译为“档案”。然而,... 文件生命周期(records lifecycle management)理论和文件连续体理论(records continuum theory)有一个共同的基础术语,即records,目前,我国的翻译中,较为普遍的观点是将documents、records译成“文件”,将archives译为“档案”。然而,随着理论研究与实践工作的不断发展与深化,将records翻译成“文件”的做法渐渐出现了分歧。虽然文件生命周期理论目前在不同场景的应用范畴不同. 展开更多
关键词 文件生命周期 文件生命周期理论 records
下载PDF
The influence of pressure waves in tidal gravity records
20
作者 Bernard Ducarme 《Geodesy and Geodynamics》 CSCD 2023年第1期15-25,共11页
For the reduction of atmospheric effects,observed gravity has initially been corrected by using the computed barometric admittance k of the in situ measured pressure,expressed in nms-2/hPa units and estimated by least... For the reduction of atmospheric effects,observed gravity has initially been corrected by using the computed barometric admittance k of the in situ measured pressure,expressed in nms-2/hPa units and estimated by least squares method.However,the local pressure changes alone cannot account for the atmospheric mass attraction and loading when the coherent pressure field exceeds a specific size,i.e.,with increasing periodicities.To overcome this difficulty,it is necessary to compute the total atmospheric effect at each station using the global pressure field.However,the direct subtraction of the total gravity effect,provided by the models of pressure correction,is not yet satisfactory for S2 and other tidal components,such as K2 and P1,which include solar heating pressure tides.This paper identifies the origin of the problem and presents strategies to obtain a satisfactory solution.First,we set up a difference vector between the tidal factors of M2 and S2 after correction of the pressure and ocean tides effects.This vector,hereafter denoted as RES,presents the advantage of being practically insensitive to calibration errors.The minimum discrepancy between the tidal parameters of M2 and S2 corresponds to the minimum of the RES vector norm d.Secondly we adopt the hybrid pressure correction method,separating the local and the global pressure contribution of the models and replacing the local contribution by the pressure measured at the station multiplied by an admittance kATM.We tested this procedure on 8 stations from the IGETS superconducting gravimeters network(former GGP network).For stations at an altitude lower than 1000 m,the value of dopt is always smaller than0.0005.The discrepancy between the tidal parameters of the M2 and S2 waves is always lower than0.05% on the amplitude factors and 0.025° on the phases.For these stations,a correlation exists between the altitude and the value kopt.The results at the three Central European stations Conrad,Pecny and Vienna are in excellent agreement(0.05%) with the DDW99NH model for all the main tidal waves. 展开更多
关键词 Atmospheric pressure waves Atmospheric pressure correction in tidal records Atmospheric pressure models ERA5 and MERRA-2
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部