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“大理学”论纲
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作者 廖德广 《大理师专学报》 2001年第1期1-4,共4页
大理是云南的古文化的中心,全方位研究大理所起的作用是显而易见的。本文作者提出建立“大理学”,并从大理学的提出、大理学的三个构成部分、大理学的名称三个方面作了初步论述。
关键词 大理学 南诏大理文化 白族学 学科建设 学科构成
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略论程颢程颐建立理学体系的逻辑方法 被引量:1
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作者 马全智 《河南大学学报(社会科学版)》 1987年第3期60-63,共4页
宋明理学的创始人程颢(公元1032—1085年)和程颐(公元1033—1107年)在建造以“天理”为核心的庞大理学体系的过程中,把逻辑的思维形式——概念、判断、推理应用到理学上,形成了理学的完整体系。本文就二程建立理学体系的逻辑方法问题作... 宋明理学的创始人程颢(公元1032—1085年)和程颐(公元1033—1107年)在建造以“天理”为核心的庞大理学体系的过程中,把逻辑的思维形式——概念、判断、推理应用到理学上,形成了理学的完整体系。本文就二程建立理学体系的逻辑方法问题作一简要的探讨。 二程对理学思想的表述,首先是用明确概念的逻辑方法来实现的。程氏对概念的产生和命名提出了自己的看法。他们认为,事物的名字,即事物的概念,当然与音义气理相通,而更重要的是“盖出自然之理”。在表达概念的名和“自然之理”的关系上,他们认为: 展开更多
关键词 理学 程颢程颐 逻辑方法 辩证判断 遗书 理一而分殊 致知 辩证概念 大理学 “理一分殊”
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论生态环境损害赔偿司法确认制度的构建 被引量:3
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作者 王灿发 王政 《北京理工大学学报(社会科学版)》 北大核心 2023年第5期83-94,共12页
现有制度体系下,生态环境损害赔偿磋商协议的执行保障依靠民事司法确认制度。生态环境利益的公益属性与民事权益的私益属性形成强烈反差,民事司法确认制度建构以私益为基础,难以满足生态环境利益救济的需要,基于现实需求,生态环境损害... 现有制度体系下,生态环境损害赔偿磋商协议的执行保障依靠民事司法确认制度。生态环境利益的公益属性与民事权益的私益属性形成强烈反差,民事司法确认制度建构以私益为基础,难以满足生态环境利益救济的需要,基于现实需求,生态环境损害赔偿司法确认制度亟待建立。在制度构建过程中,要明确生态环境损害赔偿司法确认制度与民事司法确认制度的差异,把握住生态环境利益的公益属性,将更好地实现受损生态环境利益的救济作为根本追求,以专业性为依托,从申请方式、管辖法院等五个维度完成制度核心的构建,进而保证受损生态环境利益救济的质量与效率。 展开更多
关键词 生态环境损害赔偿 司法确认 生态环境公益 制度构建
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论清初统治策略对《歧路灯》的影响
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作者 万建清 《明清小说研究》 CSSCI 1990年第Z1期260-269,共10页
目前,学术界对《歧路灯》的研究存在着这样一种观点,即李绿园在小说中反映的某些思想,诸如穷经致用、反对伪道学、士农工商都是正务等,是接受了清初顾炎武、黄宗羲乃至明末王艮、李贽等进步思想家的影响。笔者以为,这种观点有必要加以... 目前,学术界对《歧路灯》的研究存在着这样一种观点,即李绿园在小说中反映的某些思想,诸如穷经致用、反对伪道学、士农工商都是正务等,是接受了清初顾炎武、黄宗羲乃至明末王艮、李贽等进步思想家的影响。笔者以为,这种观点有必要加以讨论。其实,正如马恩所说,“任何一个时代的统治思想始终都不过是统治阶级的思想”,换言之,“ 展开更多
关键词 统治策略 统治思想 士农工商 统治者 统治阶级 黄宗羲 大理学 乾隆 学术界 河南
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DF_(8BJ)内燃机车交流传动控制系统 被引量:1
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作者 刘可安 谭雪谦 马健 《机车电传动》 北大核心 2003年第4期22-24,共3页
阐述了DF8BJ(“西部之光”)内燃机车交流传动控制系统的功能,对完成其控制功能的系统组成和控制策略进行了详细介绍。分析了试验过程中出现的一些问题,并提出了解决方法。试验和运用证明,该控制系统性能优良,工作稳定,能满足内燃机车交... 阐述了DF8BJ(“西部之光”)内燃机车交流传动控制系统的功能,对完成其控制功能的系统组成和控制策略进行了详细介绍。分析了试验过程中出现的一些问题,并提出了解决方法。试验和运用证明,该控制系统性能优良,工作稳定,能满足内燃机车交流传动的控制要求。 展开更多
关键词 DF8BJ内燃机车 交流传动 控制系统 直接转矩控制 粘着控制
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Study on Kinetic Characteristics of Alliinase 被引量:4
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作者 葛艳辉 赵俊英 +1 位作者 闵笛 冯炘 《Agricultural Science & Technology》 CAS 2008年第1期139-142,共4页
[Objective] The kinetic characteristics of alliinase was studied to select the optimum reaction performance. [Method] Alliinase activity was measured to analysis the influence of temperature, pH, substrate concentrati... [Objective] The kinetic characteristics of alliinase was studied to select the optimum reaction performance. [Method] Alliinase activity was measured to analysis the influence of temperature, pH, substrate concentration and metal iron. [Result] Alliinase was an enzyme with thermal instability. Its optimum reaction temperature was 29℃ and pH value was 6.1. The Vmax was 0. 439 IU/mg and Km was 0.483 mmol/L by using natural extract as substrate. Alliinase activity was activated when the K^+ , Mg^2+ , Na^+ and Cd^2+ existed and alliinase activity was inhibited when Cu^2+ existed. [Condusion] Results showed that the kinetic characteristics of alliinase supply the academic foundation for development and application of garlic medical products. 展开更多
关键词 Allium sativum ALLIINASE Kinetic characteristics
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Histopathological Observation of Colibacillosis in Laying Hens
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作者 沈萍 张艳英 +5 位作者 何立宁 高桂生 史秋梅 高光平 邵欣华 郝佳科 《Agricultural Science & Technology》 CAS 2013年第8期1167-1170,共4页
[Objective] This study aimed to investigate the histopathological changes of hens with colibacillosis.[Method] Epidemiological investigation,clinical symptoms observation,pathological autopsy,laboratory diagnosis and ... [Objective] This study aimed to investigate the histopathological changes of hens with colibacillosis.[Method] Epidemiological investigation,clinical symptoms observation,pathological autopsy,laboratory diagnosis and paraffin-embedded tissue section were performed to diagnose the laying hens from a farm in Changli County,affected by a disease similar to pericarditis and perihepatitis in clinical symptoms.[Result] The pathogen isolated from those hens was E.coli.The histopathological changes of the diseased hens included myocardial cell degeneration and inflammatory cell infiltration in heart,fibrotic perihepatitis,necrotic hepatitis in liver,decreased lymphoid cells and inflammatory cell infiltration in spleen,lung congestion,lung room full of erythrocytes,hyaline degeneration in glomerular capillary and small intestinal epithelial cell shedding.[Conclusion] This study will provide scientific basis for the diagnosis and control of colibacillosis in poultry. 展开更多
关键词 HEN COLIBACILLOSIS HISTOPATHOLOGY ORGAN
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酒乡胜迹春风亭
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作者 李永庆 《中州统战》 1995年第5期37-37,共1页
酒乡胜迹春风亭李永庆在古老的名酒之乡宝丰县,有个闻名遐尔的名胜古迹──春风亭。它座落在宝丰城西北二十五华里古镇商酒务程明道祠内。是宝丰八景之一,久负胜名。亭高九丈几尺,八角重檐。登亭四望,南可眺沙河滩的白沙;北可望北... 酒乡胜迹春风亭李永庆在古老的名酒之乡宝丰县,有个闻名遐尔的名胜古迹──春风亭。它座落在宝丰城西北二十五华里古镇商酒务程明道祠内。是宝丰八景之一,久负胜名。亭高九丈几尺,八角重檐。登亭四望,南可眺沙河滩的白沙;北可望北汝河舞银蛇,东可瞻净肠、玉带二河簇... 展开更多
关键词 榷酒 大理学 名酒之乡 宝丰县 为官清正 名胜古迹 程颢 汝州 大收入 宋神宗
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步游清源山
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作者 康细民 《风景名胜》 2004年第9期93-95,共3页
这三四年来,到清源山去晨登已经成为一种时尚了。 回望这座千年名山,我们从曲径通幽的古道仿佛看到了历史烟云。泉州北宋名知府王十朋"登山如入上下竺,宴坐疑临大小湫"的典雅,南宋大理学家朱熹"联车陟修坂,览物穷山川&qu... 这三四年来,到清源山去晨登已经成为一种时尚了。 回望这座千年名山,我们从曲径通幽的古道仿佛看到了历史烟云。泉州北宋名知府王十朋"登山如入上下竺,宴坐疑临大小湫"的典雅,南宋大理学家朱熹"联车陟修坂,览物穷山川"的高古,明代大史学家何乔远"冈磐纵步,石液砺齿"的劲健,唐代诗人韩偓"无奈离肠日九回,强掳怀抱立高台"的悲慨,明代诗人黄克晦"蹑屐名山顶,长风吹布袍"的旷达--披阅清源山历代诗词以遥想古之贤哲的登山风格,用司空图的二十四诗品加以解读皆妙在其中,直令人心追步疾,恨不即刻置身此山。 展开更多
关键词 清源山 二十四诗品 何乔远 黄克晦 上下竺 历史烟云 唐代诗人 司空图 史学家 大理学
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武冈古城的传说
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作者 杨运焰 《邵阳高等专科学校学报》 1994年第3X期104-105,共2页
一、朱熹与武冈城 大家都知道“邵阳狮子东安塔,武冈城墙迈(迈,超越之意)天下”这样一句熟语,但很少有人知道,武冈城的修建竟与宋朝大理学家朱熹有关。
关键词 吕洞宾 农民起义军 封建统治者 朱熹 古城 大家都知道 大理学 《太平广记》 少数民族 信笔涂鸦
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Partial Physiologic Differences between High-fat Diet Induced Obesity-prone and Obesity-resistant Rats 被引量:2
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作者 周旭华 郭锡熔 +4 位作者 丁胜利 陈荣华 莫宝庆 刘倩琦 费莉 《Journal of Nanjing Medical University》 2004年第6期315-319,共5页
Objective: To observe the differences of partial physiologic indexes including weight, food intake, Lee's index, the wet weight of fat pad, plasma lipids and the genetic expression of LPL mRNA in adipose tissue be... Objective: To observe the differences of partial physiologic indexes including weight, food intake, Lee's index, the wet weight of fat pad, plasma lipids and the genetic expression of LPL mRNA in adipose tissue between obesity-prone rats (OP) and obesity-resistant rats (OR) on a high-fat diet. Methods: After 1 week of free access to a high-fat diet (HFD), 48 rats were separated on the basis of 1 week body weight percentage gained in OP (OP≥P75) or OR (OR≤P25) groups. Rats were continuously fed on the HFD for another 4 weeks. The body weight and food intake were recorded in the course of model-making. And the Lee's index, the plasma lipid and lipoproteins, the wet weight of both epididymal and retroperitoneal fat pad were measured after the rat was killed. And the level of LPL mRNA expression in adipose tissue was detected by Northern Blot technique. Results: ① In OP rats, the speed of body weight gain, the cumulative energy intake, the Lee's index, and the wet weight of fat pad at both epididymal and retroperitoneal sites were significantly higher than those in OR rats, but there was no significant difference in the level of plasma lipid and lipoproteins between these two groups. ② After 1 week and 5 weeks on the high-fat diet, the gain of body weight in OP rats were about 6.45 and 4.25 times of those in OR rats. Meanwhile, the cumulative energy intake in OP rats was only about 1.13 and 1.15 times of those in OR rats. ③ Despite the depressive effect of the high-fat diet on the level of LPL mRNA expression in adipose tissue, there was a significant level of LPL mRNA in adipose tissue of OP rats compared with that in OR rats. Conclusion: The physiologic differences exist between OP and OR rats. Besides a higher level of energy intake, the higher energy efficiency associated with LPL mRNA expression in adipose tissue may also contribute to the enhancement of susceptibility to obesity in OP rats. 展开更多
关键词 OBESITY SUSCEPTIBILITY high-fat diet physiologic difference rat
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On management of college English teaching of big classes
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作者 郑冬临 《Sino-US English Teaching》 2007年第11期35-38,共4页
In recent years, the scale of enrollment of college students has been expanded. As a result, in colleges teachers are badly needed for the basic course of college English. To solve this problem, big classes are adopte... In recent years, the scale of enrollment of college students has been expanded. As a result, in colleges teachers are badly needed for the basic course of college English. To solve this problem, big classes are adopted for college English teaching in some universities. And scientific management can guarantee the quality of college English teaching of big classes. Finally, this article introduces four tactics to manage college English teaching of big classes. 展开更多
关键词 college English teaching of big classes teaching management
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STUDY OF THE MODIFICATION OF MULTI-MODEL ENSEMBLE SCHEMES FOR TROPICAL CYCLONE FORECASTS 被引量:9
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作者 张涵斌 智协飞 +2 位作者 陈静 王亚男 王轶 《Journal of Tropical Meteorology》 SCIE 2015年第4期389-399,共11页
This study investigates multi-model ensemble forecasts of track and intensity of tropical cyclones over the western Pacific, based on forecast outputs from the China Meteorological Administration, European Centre for ... This study investigates multi-model ensemble forecasts of track and intensity of tropical cyclones over the western Pacific, based on forecast outputs from the China Meteorological Administration, European Centre for Medium-Range Weather Forecasts, Japan Meteorological Agency and National Centers for Environmental Prediction in the THORPEX Interactive Grand Global Ensemble(TIGGE) datasets. The multi-model ensemble schemes, namely the bias-removed ensemble mean(BREM) and superensemble(SUP), are compared with the ensemble mean(EMN) and single-model forecasts. Moreover, a new model bias estimation scheme is investigated and applied to the BREM and SUP schemes. The results showed that, compared with single-model forecasts and EMN, the multi-model ensembles of the BREM and SUP schemes can have smaller errors in most cases. However, there were also circumstances where BREM was less skillful than EMN, indicating that using a time-averaged error as model bias is not optimal. A new model bias estimation scheme of the biweight mean is introduced. Through minimizing the negative influence of singular errors, this scheme can obtain a more accurate model bias estimation and improve the BREM forecast skill. The application of the biweight mean in the bias calculation of SUP also resulted in improved skill. The results indicate that the modification of multi-model ensemble schemes through this bias estimation method is feasible. 展开更多
关键词 TIGGE data multi-model ensemble tropical cyclone biweight mean
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A Numerical Study of Vortex and Precipitating Cloud Merging in Middle Latitudes 被引量:3
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作者 平凡 罗哲贤 琚建华 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第5期1222-1225,共4页
We mainly focus on the study of precipitating cloud merging associated with vortex merging. The vortex and precipitating cloud merging are simulated by the cloud resolving model from 0000 21 to 1800 23 July 2003. The ... We mainly focus on the study of precipitating cloud merging associated with vortex merging. The vortex and precipitating cloud merging are simulated by the cloud resolving model from 0000 21 to 1800 23 July 2003. The results show that the model well simulates vortex circulation associated with precipitating clouds. It is also proven that the vortex merging follows the precipitating cloud merging although vortices show the spatial and temporal differences. The convection vorticity vector is introduced to describe the merging processes. Two merging cases are identified during the 42-h simulation and are studied. 展开更多
关键词 ISOLATED OBSTACLE CUMULUS CLOUDS CONVECTION EVOLUTION MERGERS LAYER GATE
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ASSIMILATION OF REAL OBSERVATIONAL DATA WITH THE GSI-HYBRID DATA ASSIMILATION SYSTEM TO IMPROVE TYPHOON FORECAST 被引量:6
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作者 李泓 骆婧瑶 陈葆德 《Journal of Tropical Meteorology》 SCIE 2015年第4期400-407,共8页
A hybrid GSI (Grid-point Statistical Interpolation)-ETKF (Ensemble Transform Kalman Filter) data assimila- tion system has been recently developed for the WRF (Weather Research and Forecasting) model and tested ... A hybrid GSI (Grid-point Statistical Interpolation)-ETKF (Ensemble Transform Kalman Filter) data assimila- tion system has been recently developed for the WRF (Weather Research and Forecasting) model and tested with simu- lated observations for tropical cyclone (TC) forecast. This system is based on the existing GSI but with ensemble back- ground information incorporated. As a follow-up, this work extends the new system to assimilate real observations to further understand the hybrid scheme. As a first effort to explore the system with real observations, relatively coarse grid resolution (27 km) is used. A case study of typhoon Muifa (2011) is performed to assimilate real observations in- cluding conventional in-situ and satellite data. The hybrid system with flow-dependent ensemble eovariance shows sig- nificant improvements with respect to track forecast compared to the standard GSI system which in theory is three di- mensional variational analysis (3DVAR). By comparing the analyses, analysis increments and forecasts, the hybrid sys- tem is found to be potentially able to recognize the existence of TC vortex, adjust its position systematically, better de- scribe the asymmetric structure of typhoon Muifa and maintain the dynamic and thermodynamic balance in typhoon ini- tial field. In addition, a cold-start hybrid approach by using the global ensembles to provide flow-dependent error is test- ed and similar results are revealed with those from cycled GSI-ETKF approach. 展开更多
关键词 hybrid data assimilation GSI ETKF tropical cyclone
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VARIATIONAL ITERATION SOLVING METHOD FOR SEA-AIR OSCILLATOR MODEL OF INTERDECADAL CLIMATE FLUCTUATIONS 被引量:3
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作者 MO Jia-qi LIN Yi-hua WANG Hui 《Chinese Geographical Science》 SCIE CSCD 2005年第3期227-230,共4页
Atmospheric physics is a very complicated natural phenomenon and needs to simplify its basic models for the sea-air oscillator. And it is solved by using the approximate method. The variational iteration method is a s... Atmospheric physics is a very complicated natural phenomenon and needs to simplify its basic models for the sea-air oscillator. And it is solved by using the approximate method. The variational iteration method is a simple and valid method. In this paper the coupled system for a sea-air oscillator model of interdecadal climate fluctuations is considered. Firstly, through introducing a set of functions, and computing the variations, the Lagrange multipliers are obtained. And then, the generalized expressions of variational iteration are constructed. Finally, through selecting appropriate initial iteration from the iteration expressions, the approximations of solution for the sea-air oscillator model are solved successively. 展开更多
关键词 NONLINEAR variational iteration El Nino-Southern Oscillator model
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A SPATIAL-TEMPORAL DISTRIBUTION CHARACTERISTICS STUDY ON THE ATMOSPHERIC CARBON DIOXIDE OBSERVED BY GOSAT SATELLITE REMOTE SENSING 被引量:4
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作者 刘瑞霞 张兴赢 +1 位作者 刘杰 刘雅各 《Journal of Tropical Meteorology》 SCIE 2015年第4期408-416,共9页
The variation of the atmospheric Carbon Dioxide (CO2) concentration plays an important role in global cli- mate and agriculture. We analyzed the spatial-temporal characteristics of CO2 in the China region and around... The variation of the atmospheric Carbon Dioxide (CO2) concentration plays an important role in global cli- mate and agriculture. We analyzed the spatial-temporal characteristics of CO2 in the China region and around the globe with the CO2 column mixing ratios observed by the Japanese GOSAT satellite (Greenhouse Gases Observing Satellite). In order to make sure that the accuracy of the CO2 data retrieved by the satellite meets the needs of the climate charac- teristics analyses, we ran a validation on the CO2 column mixing ratios retrieved by the satellite against the ground-based TCCON (Total Carbon Column Observing Network) observation data. The result shows that the two sets of data have a correlation coefficient of higher than 0.7, and a bias of within 2.2 ppmv. Therefore, the GOSAT CO2 da- ta can be used for the climate characteristics analysis of global CO2. Our analysis on the spatial-temporal characteristics of the CO2 column mixing ratios observed during the period of June 2009 through January 2014 proved that, with the impact of the natural emission of near ground CO2 and human activities, the global CO2 concentration has a significant latitudinal characteristics with its highest level averaging 390 oomv in the 0-40?N latitudinal zone in the Northern Hemisphere, and 387 ppmv in the Southern Hemisphere. China has a relatively higher CO2 concentration with the highest level exceeding 398 ppmv, and the eastern area higher than the western area. The variation of global CO2 concentration shows a seasonal pattern, i.e. the CO2 concen- tration reaches its highest in spring in the Northern Hemisphere averaging more than 392 ppmv, second highest in win- ter, and lowest in summer averaging less than 387 ppmv. It fluctuates the most in the Northern Hemisphere with an av- erage concentration of 392.5 ppmv in April, and 385.5 ppmv in July. While in the Southern Hemisphere, the seasonal fluctuation is smaller with the highest concentration occurring in July. Over the recent years, the global CO2 concentra- tion has shown an elevating trend with an average annual increase rate of 1.58 ppmv per year. It is a challenge that the human kind has to face to slow down the increase of the CO2 concentration. 展开更多
关键词 GOSAT CO2 spatial-temporal characteristics VALIDATION
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THE RELATIONSHIP BETWEEN THE ATMOSPHERIC HEATING SOURCE/SINK ANOMALIES OF ASIAN MONSOON AND FLOOD/DROUGHT IN THE YANGTZE RIVER BASIN IN THE MEIYU PERIOD 被引量:4
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作者 岑思弦 巩远发 +1 位作者 赖欣 彭亮 《Journal of Tropical Meteorology》 SCIE 2015年第4期352-360,共9页
NCEP/NCAR reanalysis data and a 30-year precipitation dataset of observed daily rainfall from 109 gauge stations are utilized in this paper.Using the REOF we analyzed the spatial distribution of precipitation in the 1... NCEP/NCAR reanalysis data and a 30-year precipitation dataset of observed daily rainfall from 109 gauge stations are utilized in this paper.Using the REOF we analyzed the spatial distribution of precipitation in the 109 stations in the Yangtze River Basin in Meiyu periods from 1978 to 2007.The result showed that the spatial distribution of precipitation in the Yangtze River Basin can be divided into the south and north part.As a result,relationships between an atmospheric heating source(hereafter called <Q_1>) over the Asian region and the precipitation on the south and north side of Yangtze River in Meiyu periods were separately studied in this paper.The results are shown as follows.The flood/drought to the north of Yangtze River(NYR) was mainly related to the <Q_1> over the East Asia summer monsoon region:when the <Q_1> over the Philippines through Western Pacific and the south China was weakened(strengthened),it would probably result in the flood(drought) in NYR;and the precipitation on the south side of Yangtze River(SYR)was related to the <Q_1> over the east Asia and Indian summer monsoon region:when the <Q_1> over the areas from south China to the northern East China Sea and Yellow Sea and south-eastern Japan was strengthened(weakened),and the <Q_1> over the areas from the Bay of Bengal to south-eastern Tibetan Plateau was weakened(strengthened),it will lead to flood(drought) in SYR. 展开更多
关键词 atmospheric heating source (〈Q1〉) Meiyu period Yangtze River Basin flood/drought
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CLIMATOLOGICAL LOW-FREQUENCY OSCILLATION OF OLR OVER THE MARITIME CONTINENT WITH ITS POSSIBLE LINKAGE TO SUMMER PRECIPITATION IN CHINA 被引量:3
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作者 靳振华 管兆勇 《Journal of Tropical Meteorology》 SCIE 2015年第4期361-373,共13页
Using the 1979-2009 NCEP/NACR reanalysis data and precipitation records in East China, research is performed of the climatological features of low-frequency oscillation(LFO) in OLR over the Maritime Continent(MC) as w... Using the 1979-2009 NCEP/NACR reanalysis data and precipitation records in East China, research is performed of the climatological features of low-frequency oscillation(LFO) in OLR over the Maritime Continent(MC) as well as their associations with precipitation disturbance in the eastern part of China. Results suggest that in the MC there is significant climatological low-frequency oscillation(CLFO) in outgoing long-wave radiation(OLR), with the intraseasonal oscillation(30-60 days) being the strongest for April-September, and the MC acting as a high-value region of percentage contributions of low-frequency OLR variance. On the low-frequency time scale there occur four events of more intense active OLR during this time interval. In the January-April(May-August) phase, MC convection is relatively weak(vigorous). The CLFO makes pronounced eastward displacement at tropics, with phase propagation seen longitudinally, too. There occur low-frequency disturbance circulations similar to the EAP wavetrain or P-J teleconnection,starting from the MC via the South China Sea and the Philippines to the Yangtze valley of China. At different phases,the variation in the low-frequency circulations and heating fields shows that the rainfall disturbance in eastern China is likely to be under possible effects of the CLFO from the MC in April-September, and the low-frequency heating variation exhibits a meridional pattern as an EAP wavetrain or P-J teleconnection. As the OLR CLFO is in a peak(valley)phase the low-level divergence or convergence with the reversal at high levels over the MC is related to relatively feeble(robust) low frequency convection, thereby exciting an EAP or P-J wavetrain from the MC to the Sea of Japan. At the higher levels, the South-Asian high is eastward(westward) of normal due to effects of low-frequency cyclones(anticyclones), resulting in less(more) rainfall in the Jiangnan(areas in the middle and lower reaches of Yangtze and to the south of the river) and Hetao(the Great Bend of Yellow River) areas, and increased(decreased) rainfall in SW China,Qinghai Plateau and Gansu. At the conversion phases, low-frequency convection becomes more active in parts of the MC, consequently exciting low-frequency wavetrain of cyclones-anticyclones-cyclones at low levels, making the South-Asian high southward of the mean, so that strong convergent zones emerge in the upper and middle Yangtze basins and Jilin of NE China, responsible for plentiful precipitation there in sharp contrast to the rainfall over the band between the Yellow and Huaihe Rivers and the Yunnan-Guizhou Plateau. These results help understand in depth the climatological LFO characteristics and the phase-locked feature, thereby further improving our understanding of the causes of rainfall disturbances in different parts of the country. 展开更多
关键词 climatological low-frequency oscillation summer rainfall Maritime Continent OLR China
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HIGH-RESOLUTION NUMERICAL SIMULATION OF TYPHOON LONGWANG(2005) WITH THE SPECTRUM NUDGING TECHNIQUE 被引量:3
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作者 李静 汤剑平 方娟 《Journal of Tropical Meteorology》 SCIE 2015年第4期311-325,共15页
With the Weather Research and Forecasting model (WRFV3.2.1), the application of specmun nudging tech- niques in numerical simulation of the genesis and development of typhoon Longwang (2005) is evaluated in this w... With the Weather Research and Forecasting model (WRFV3.2.1), the application of specmun nudging tech- niques in numerical simulation of the genesis and development of typhoon Longwang (2005) is evaluated in this work via four numerical experiments with different nudging techniques. It is found that, due to the ability to capture the large-scale fields and to keep the meso-to small-scale features derived from the model dynamics, the experiment with spectrum nudging technique can simulate the formation, intensification and motion of Longwang properly. The improve- ment on the numerical simulation of Longwang induced by the spectrum nudging depends on the nudging coefficients. A weak spectrum nudging does not make significant improvement on the simulation of Longwang. Although the experi- ment with four-dimensional data assimilation, i.e., FDDA, also derives the genesis and movement of Longwang appro- priately, it fails to simulate the intensifying process of Longwang properly. The reason is that, as the large-scale features derived from the model are nudged to the observational data, the meso- to small-processes produced by the model dy- namics important to the intensification of typhoon are nearly smoothed by FDDA. 展开更多
关键词 TYPHOON GENESIS INTENSIFICATION spectrum nudging FDDA
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