检索结果-南通市图书馆

Future Changes in the Impact of North Pacific Midlatitude Oceanic Frontal Intensity on the Wintertime Storm Track in CMIP5 Models

引用

Journal of Meteorological Research 2020年第6期34卷 1199-1213页

作者： Yao YAO Zhong ZHONG xiu-qun yang Xiaogang HUANG College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073 Jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric SciencesNanjing UniversityNanjing 210023 Army Academy of Artillery and Air Defense(Nanjing Campus) Nanjing 211132

The storm track and oceanic front play an important role in the midlatitude air–sea *** this study,future changes in the impact of the North Pacific midlatitude oceanic frontal intensity on the wintertime storm track are projected based on climate model outputs from the Coupled Model Intercomparison Project Phase 5(CMIP5).The performance of 13 CMIP5 models is evaluated,and it is found that a majority of these models are capable of reproducing the northward intensification of the storm track in response to the strengthened oceanic *** ensemble means of outputs from six best models under three Representative Concentration Pathway(RCP)scenarios(RCP2.6,RCP4.5,and RCP8.5)are compared with the results of the historical simulation,and future changes are *** is found that the impact of the oceanic frontal intensity on the storm track tends to get stronger and extends further westward in a warming climate,and the largest increase appears in the RCP8.5 *** analysis reveals that the stronger impact of the oceanic front on the storm track in the future may be partially attributed to the greater oceanic frontal impact on the near-surface baroclinicity,which is mainly related to the intensified oceanic frontal impact on the meridional potential temperature gradient under the climate change ***,this process can hardly explain the increasing impact of the oceanic front on the upstream of the storm track.

关键词： storm track midlatitude oceanic front climate change Coupled Model Intercomparison Project Phase 5(CMIP5)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Cross-Seasonal Linkage between Arctic Sea Ice and Eurasian Summertime Temperature Fluctuations

引用

Advances in Atmospheric Sciences 2023年第12期40卷 2195-2210页

作者： Yanting LIU yang ZHANG Sen GU xiu-qun yang Lujun ZHANG School of Atmospheric Sciences Nanjing UniversityNanjing 210023China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China

This study explores the linkage between summertime temperature fluctuations over midlatitude Eurasia and the preceding Arctic sea ice concentration (SIC) by utilizing the squared norm of the temperature anomaly, the essential part of local eddy available potential energy, as a metric to quantify the temperature fluctuations with weather patterns on various timescales. By comparing groups of singular value decomposition (SVD) analysis, we suggest a significant linkage between strong (weak) August 10-to-30-day temperature fluctuations over mid-west Asia and enhanced (decreased) Barents-Kara Sea ice in the previous February. We find that when the February SIC increases in the Barents-Kara Sea, a zonal dipolar pattern of SST anomalies appears in the Atlantic subpolar region and lasts from February into the summer months. Evidence suggests that in such a background state, the atmospheric circulation changes evidently from July to August, so that the August is characterized by an amplified meridional circulation over Eurasia, weakened westerlies, and high- pressure anomalies along the Arctic coast. Moreover, the 10-to-30-day wave becomes more active in the North Atlantic-Barents-Kara Sea-Central Asia regions and manifests a more evident southward propagation from the Barents- Kara Sea into the Ural region, which is responsible for the enhanced 10-to-30-day wave activity and temperature fluctuations in the region.

关键词： Arctic sea ice midlatitude atmospheric circulation summertime temperature fluctuations wave train North Atlantic SST

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of the tropical Indian-Pacific warming on winter snow depth decadal increase over Tibetan Plateau during 1950-1999

Effect of the tropical Indian-Pacific warming on winter snow...

引用

第32届中国气象学会年会

作者： Cuijiao Chu xiu-qun yang Shanshan Zhao Xuguang Sun Jiabei Fang Institute for Climate and Global Change Research Jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric Sciences Nanjing University Diversion of Climate Impact Assessment National Climate Center

The sea surface temperatures（SSTs） of the tropical Indian-Pacific Ocean show a pronounced warming since the late 1970 s. In this study, uncoupled atmospheric general circulation model（AGCM） experiments are conducted to examine the sensitivity of tropical Ocean basins from the Indian Ocean to the Pacific Ocean on wintertime snow depth over Tibetan Plateau（TP） and precipitation in South China（SC）. Our results suggest that thetropical Indian Ocean（TIO） warming plays a significant role for thewintertime decadal increase of snow depth over East TP from 1980 s to the end of 1990 s, and may also have contributed to the increase of rainfall in SC during corresponding period, which is in contrast to the tropical West Pacific Ocean（TWP）warming, also is different from the tropical central and eastern Pacific Ocean（TCEP） warming. It is found that more moisture supply associated with the intensification of the southerly flow over the Bay of Bengal and an increase of humidity over the TIOare beneficial to the decadal increased snow depth over East TP after the late 1970 s. Additional factors for excessive snowfall depth include a deeper India-Burma trough, that bring more cold north air southward to TP due to the TIOwarming. The TCEP warming gives rise to an anticyclone anomaly over the Philippine Sea results response to the suppressed convective *** water vapor flux could get to the TP and SC. However, during the isolate TWPwarming, a negative moisture supply to the precipitation of SC, is also not effective to the decadal increaseof snow depth over TP.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Erratum

引用

Journal of Meteorological Research 2021年第6期35卷 1148-1148页

作者： Licheng WANG Xuguang SUN xiu-qun yang Lingfeng TAO Zhiqi ZHANG CMA-NJU Joint Laboratory for Climate Prediction Studies School of Atmospheric SciencesNanjing UniversityNanjing 210023

This erratum is to report a figure misplacement in Wang et al.(2021)entitled“Contribution of Water Vapor to the Record-Breaking Extreme Meiyu Rainfall along the yangtze River Valley in 2020.”In Wang et al.(2021),Fig.2b should be switched with Fig.2d(note that the labels on top of Figs.2b and 2d need not change).The correct figure as a whole is given here(Fig.2).

关键词： change yangtze Rainfall

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中风偏瘫急性期的康复护理

引用

中国实用护理杂志 2006年第9期22卷 14-15页

作者：严秀群杨建英吴军君深圳市宝安区中医院康复科

目的探讨康复护理对中风偏瘫急性期患者日常生活能力和肢体运动功能的作用和重要性。方法选取80例发病在2周以内的中风患者经临床和CT确诊,随机分为康复组和对照组各40例,2组治疗用药原则相同,康复组在急性期即进行康复护理,对照组于急... 详细信息

目的探讨康复护理对中风偏瘫急性期患者日常生活能力和肢体运动功能的作用和重要性。方法选取80例发病在2周以内的中风患者经临床和CT确诊,随机分为康复组和对照组各40例,2组治疗用药原则相同,康复组在急性期即进行康复护理,对照组于急性期过后再进行康复护理。康复护理2个月后同时对2组作效果评价。结果康复前2组Barthel指数及Fugl-Meyer运动功能评分差异均无显著性。经平均2个月的康复体疗,2组患者评分都有所提高。康复组患者评分提高幅度更大,经t检验两组差异有显著性（P<0.01）。结论早期康复可以防止和减轻废用综合征的产生并促进功能恢复,对中风有良好的预后。

关键词：中风偏瘫功能训练康复护理

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemoselective Bromodecarboxylation ofα-Carboxy-α-cinnamoyl Ketene Cyclic Dithioacetals

引用

Chemical Research in Chinese Universities 2005年第5期21卷 626-629页

作者： WANG Mang XU Xian-xiu LIU qun yang Xiao-xia Faculty of Chemistry Northeast Normal University Changchun 130024 P. R. China

α-Oxoketene dithioacetals（ compound 1 ） are versatile synthons for organic synthesis due to their specially structural characteristic, that is, the masked ketene is conjugated with the convertible carbonyl in their molecules. Although there have been numerous reports covering the reactions in which they have been taken as 1,3-electrophiles, the reaction at the α-carbon atom of α-oxoketene dithioacetals has seldom been investigated. Junjappa and co-workers found the α- bromination of compound 2 in the presence of NBS led to α-aroyl-α-bromo ketenedithioacetals. However, the flexibility of the functional groups at the α-carbon atom of compound 2 are still limited.

关键词： Chemoselective Bromodecarboxylation α-Carboxy-α-cinnamoyl ketene cyclic dithioacetal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lipophilic Enhance of Vitamin C Protective Activity Against Free-radical-induced Damage in vivo

引用

Chemical Research in Chinese Universities 2003年第4期19卷 428-431页

作者： LUOXu-yang LIUZai-qun SUNYun-xiu SUIDa-yuan YUXiao-feng QUShao-chun CollegeofChemistry JilinUniversityChangchun130023P.R.China CollegeofPharmacy JilinUniversityChangchun130021P.R.China

A group of experimental rats under free radical damage are given various amounts of a lipophilic vitamin C(ascorbyl-6-laurate, VC-12), and its parent compound, vitamin C, respectively. It has been found that the effects of 1 12 mmol/kg VC-12 on decreasing triglyceride(TG), total cholesterol(TC), low density lipoprotein cholesterol (LDL-c) and lipid peroxide(LPO), and increasing high density lipoprotein cholesterol(HDL-c) and superoxide dismutase(SOD) are similar to those of 2 27 mmol/kg vitamin C. In addition, VC-12(1 12 mmol/kg) can increase the prostacycline(PGI 2) and decrease the thromboxane(TXA 2) even better than vitamin C(2 27 mmol/kg). The above facts demonstrate that the antioxidative activity of VC-12 is higher than twice that of vitamin C. So, ascorbyl-6-laurate may be a novel antioxidant drug against free radical damage.

关键词： Antioxidant Free radical Ascorbyl-6-laurate Vitamin C Blood lipid metabolism in vivo

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solvothermal Syntheses and Characterizations of Two New Sliver Selenidoantimonates of Ag_3SbSe_3 and Ag_5SbSe_4~

引用

Chinese Journal of Structural Chemistry 2016年第2期35卷 227-236页

作者： YUE Cheng-yang ZHANG Hui-Ping LU Xin-xiu BAI Yi-qun SHI Hao XU Xin Key Laboratory of Inorganic Chemistry in Universities of Shandong Department of Chemistry and Chemical EngineeringJining University

Two new sliver selenidoantimonates,namely,Ag3SbSe3 and Ag5SbSe4,were prepared under mid solvothermal conditions and structurally characterized by single-crystal X-ray diffraction ***3SbSe3 crystallizes in the orthorhombic space group Pnma（No.62） with a =8.2414（12）,b = 11.4925（17）,c = 21.220（3） A,V= 2009.8（5） A^3 and Z= *** structure belongs to the β-Ag3AsSe3 type and features a 3D complex network composed of distorted trigonal planar AgSe3 and tetrahedral AgSe4 units as well as SbSe3 trigonal ***5SbSe4 crystallizes in the orthorhombic system,nocentrosymmetric space group Cmc21（No.36） with a = 8.1148（6）,b =12.9829（10）,c = 8.7017（7） A,V= 916.76（12） A^3 and Z = *** structure adopts the Ag5SbS4 type and features a 3D framework based on trigonal planar AgSe3 units and SbSe3 trigonal *** results of optical absorption spectra and band structure calculations indicate that the title compounds are narrow band-gap semiconductors.

关键词： selenidoantimonate solvothermal synthesis crystal structure band calculation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plants of Leptostrobus Heer （Czekanowskiales） from the Early Cretaceous and Late Triassic of China, with Discussion of the Genus

引用

Journal of Integrative Plant Biology 2006年第2期48卷 137-147页

作者： xiu-qun Liu Cheng-Sen Li Yu-Fei Wang Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Investigation of the Mesozoic seed plant Leptostrobus Heer from the yangcaogou Formation of the Late Triassic and the Yixian Formation of the Early Cretaceous, Liaoning Province, China, provides new Insight Into Its general morphology and geographical distribution. The materials of L. cancer from the Yixian Formation described herein are later than all the past findings of this species and add to the record of L. cancer during the Early Cretaceous. Based on well-preserved specimens, the specific diagnosis Is slightly emended and the reconstructlon of L. cancer Is perfected. The materials from the yangcaogou Formation of the Late Triassic are placed in L. spheericus, in addition, we review the history of investigation of the genus Leptostrobus since its establishment in 1876 and discuss the main characteristics of each species.

关键词： Early Cretaceous Late Triassic Leptostrobus yangcaogou Formation Yixian Formation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oxidation behavior of 4774DD1 Ni-based single-crystal superalloy at 980℃ in air

引用

China Foundry 2024年第2期21卷 116-124页

作者： Yu Fang Ya-zhou Li Qiang yang qun-gong He xiu-fang Gong Qian Duan Hai-yang Song Fu Wang Qiong-yuan Zhang Hong Zeng State Key Laboratory of Long-Life High Temperature Materials Dongfang Turbine Co.Ltd.Deyang 618000SichuanChina State Key Laboratory for Manufacturing System Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China

The oxidation behavior of a novel Ni-based single-crystal 4774DD1 superalloy for industrial gas turbine applications was investigated by the isothermal oxidation at 980℃ and discontinuous oxidation weight gain *** phase constitution and morphology of surface oxides and the characteristics of the crosssection oxide film were analyzed by XRD,SEM and *** show that the oxidation kinetics of the 4774DD1 superalloy follows the cubic law,indicating its weak oxidation resistance at this *** the oxidation time increases,the composition of the oxide film evolves as following:One layer consisting of a bottom Al_(2)O_(3)sublayer and an upper(Al_(2)O_(3)+NiO)mixture sublayer after oxidized for 25 ***,two layers composed of an outermost small NiO discontinuous grain layer and an internal layer for 75 *** internal layer is consisted of the bottom Al_(2)O_(3)sublayer,an intermediate narrow CrTaO_(4)sublayer,and an upper(Al_(2)O_(3)+NiO)mixture *** two layers comprising an outermost relative continuous NiO layer with large grain size and an internal layer as the oxidation time increases to 125 *** internal layer is composed of the upper(Al_(2)O_(3)+NiO)mixture sublayer,an intermediate continuous(CrTaO_(4)+NiWO_(4))mixture sublayer,and a bottom Al_(2)O_(3)***,three layers consisting of an outermost(NiAl2O_(4)+NiCr2O_(4))mixture layer,an intermediate(CrTaO_(4)+NiWO_(4))mixture layer,and a bottom Al_(2)O_(3)layer for 200 h.

关键词： nickel-base single crystal superalloy oxidation kinetics oxide film microstructure mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：