检索结果-南通市图书馆

The Linkage between Midwinter Suppression of the North Pacific Storm Track and atmospheric Circulation Features in the Northern Hemisphere

引用

Advances in atmospheric sciences 2022年第3期39卷 502-518页

作者： Minghao YANG Chongyin LI Xin LI Xiong CHEN Lifeng LI College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The midwinter suppression(MWS) of the North Pacific storm track(NPST) has been an active research topic for decades. Based on the daily-mean NCEP/NCAR reanalysis from 1948 to 2018, this study investigates the MWS-related atmospheric circulation characteristics in the Northern Hemisphere by regression analysis with respect to a new MWS index, which may shed more light on this difficult issue. The occurrence frequency of the MWS of the upper-tropospheric NPST is more than 0.8 after the mid-1980 s. The MWS is accompanied by significantly positive sea-level pressure anomalies in Eurasia and negative anomalies over the North Pacific, which correspond to a strengthened East Asian winter monsoon. The intensified East Asian trough and atmospheric blocking in the North Pacific as well as the significantly negative low-level air temperature anomalies, lying upstream of the MNPST, are expected to be distinctly associated with the MWS. However, the relationship between the MWS and low-level atmospheric baroclinicity is somewhat *** the diagnostics of the eddy energy budget, it is identified that the inefficiency of the barotropic energy conversion related to the barotropic governor mechanism does not favor the occurrence of the MWS. In contrast, weakened baroclinic energy conversion, buoyancy conversion, and generation of eddy available potential energy by diabatic heating are conducive to the occurrence of the MWS. In addition, Ural blocking in the upstream region of the MNPST may be another candidate mechanism associated with the MWS.

关键词： midwinter suppression North Pacific storm track anomalous atmospheric circulation eddy energy budget

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

Interannual Influences of the Surface Potential Vorticity Forcing over the Tibetan Plateau on East Asian Summer Rainfall

引用

Advances in atmospheric sciences 2022年第7期39卷 1050-1061页

作者： Chen SHENG Bian HE Guoxiong WU Yimin LIU Shaoyu ZHANG state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary sciences University of Chinese Academy of SciencesBeijing 100049China

The influences of interannual surface potential vorticity forcing over the Tibetan Plateau(TP)on East Asian summer rainfall(EASR)and upper-level circulation are explored in this *** results show that the interannual EASR and associated circulations are closely related to the surface potential vorticity negative uniform leading mode(PVNUM)over the *** the PVNUM is in the positive phase,more rainfall occurs in the Yangtze River valley,South Korea,Japan,and part of northern China,less rainfall occurs in southern China,and vice versa.A possible mechanism by which PVNUM affects EASR is *** air induced by the positive phase of PVNUM could stimulate significant upward motion and a lower-level anomalous cyclone over the *** a result,a dipole heating mode with anomalous cooling over the southwestern TP and anomalous heating over the southeastern TP is *** experiment results regarding this dipole heating mode indicate that anomalous cooling over the southwestern TP leads to local and northeastern Asian negative height anomalies,while anomalous heating over the southeastern TP leads to local positive height *** results greatly resemble the realistic circulation pattern associated with *** analysis indicates that the anomalous water vapor transport associated with this anomalous circulation pattern is responsible for the anomalous ***,changes in surface potential vorticity forcing over the TP can induce changes in EASR.

关键词： surface potential vorticity East Asian summer monsoon rainfall the Tibetan Plateau

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

Evaluation of Performance of Polar WRF Model in Simulating Precipitation over Qinghai-Tibet Plateau

引用

Journal of Tropical Meteorology 2023年第4期29卷 410-430页

作者：薛建军肖子牛 China Meteorological Administration Training Centre Beijing 100081 China state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 China

Considering the complex topographic forcing and large cryosphere concentration,the present study utilized the polar-optimized WRF model(Polar WRF)to conduct downscaling simulations over the Qinghai-Tibet Plateau(TP)and its surrounding ***-group experiments with the 10 km horizontal resolution are used to evaluate the modeling of ***,on the basis of the model ground surface properties upgrade and the optimized Noah-MP,the“better-performing”configuration suite for modeling precipitation is comprehensively *** model parameters such as nudging options,five cumulus parameterization schemes,two planetary boundary layer schemes,and six microphysics schemes are investigated to further refine the Polar WRF ***,the precipitation simulation for a full calendar year is compared with multiple reanalyses and *** simulations demonstrate that the Polar WRF model successfully captures the general features of precipitation over this region and is sensitive to model *** on the results,it is recommended to use grid nudging with q intensity coefficient of 0.0002,the multi-scale kain-fritsch cumulus parameterization,the Yonsei University boundary layer scheme,and the Morrison 2-mom microphysics with reduced default droplet concentration value of 100 ***,the model performance is better than the ERA-interim and TRMM *** is comparable to,and in some cases slightly better than,the CRA-Land,especially in the prediction for the western part of the plateau where in situ observations are limited,and the cryosphere-atmosphere interaction is more pronounced.

关键词： Polar WRF precipitation Qinghai-Tibet Plateau downscaling simulations parameter optimization

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

Precipitation anomaly over the Tibetan Plateau affected by tropical sea-surface temperatures and mid-latitude atmospheric circulation in September

引用

Science China Earth sciences 2023年第3期66卷 619-632页

作者： Ping ZHANG Anmin DUAN state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth Science University of Chinese Academy of SciencesBeijing 100049China state key laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China

Tibetan Plateau(TP)precipitation is affected by anomalous circulation systems in both the tropics and mid-latitudes,due to the TP’s unique geographical *** using observational,reanalysis,and CMIP6 model datasets,this study reveals the individual and joint effects of the Indian Ocean Dipole(IOD)and Silk Road pattern(SRP)on the interannual variability of TP precipitation in *** the positive IOD phase,the zonal gradient of the sea-surface temperature anomalies(SSTAs)drives a Gill-type response with an anticyclonic anomaly over the Indian subcontinent and Bay of *** the north,anomalous westerlies induce a shallow trough,and the associated anomalous southwesterlies transport moisture to the southeastern TP,resulting in surplus precipitation ***,the westerly jet disturbances over the North Atlantic excite an SRP-like pattern,resulting in a baroclinic structure in northern India with the upper(lower)tropospheric anomalous anticyclone(cyclone)over west-central Asia(northern India).The anomalous southwesterlies to the east of the low-level cyclone transport abundant moisture to the southeastern TP,which results in increased precipitation *** joint effects of IOD and SRP can explain nearly 52%of the TP precipitation anomaly,exceeding the contribution of IOD(19%)and SRP(27%)*** results highlight the necessity of considering the joint effects of drivers in the tropics and mid-latitudes,providing a basis for more accurate simulations and predictions of TP precipitation.

关键词： Tibetan Plateau precipitation Interannual variability Indian Ocean Dipole Silk Road pattern

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

Ground–Space–Sky Observing System Experiment during Tropical Cyclone Mulan in August 2022

引用

Advances in atmospheric sciences 2023年第2期40卷 194-200页

作者： Pak-wai CHAN Wei HAN Betty MAK Xiaohao QIN Yongzhu LIU Ruoying YIN Jincheng WANG Hong Kong Observatory Hong KongChina China Meteorological Administration Earth System modeling and Prediction Centre Beijing 100081China state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Forecasting tropical cyclone track and intensity is a great challenge for the meteorological community,and safeguarding the life and property of people living near the coast is an important *** major reason for challenging forecasts is the lack of observations over the vast *** tropical cyclone Mulan between 8 and 10 August 2022 over the northern part of the South China Sea,the meteorological authority and research institutes of Chinese mainland collaborated with the meteorological service in Hong Kong on conducting the first-ever ground–space–sky observing system experiment on tropical cyclone *** enhanced targeted observations collected during the experiment include Geostationary Interferometric Infrared Sounder,round-trip radiosondes,and aircraft-launched *** paper describes the campaign,technical details of the meteorological models used,and impact of the additional targeted observation data on the tropical cyclone ***,similar enhanced observation campaigns could be conducted in the future,not only in the northern part of the South China Sea,but also in other ocean basins.

关键词： meteorological cyclone tropical

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

Interannual Meridional Displacement of the Upper-Tropospheric Westerly Jet over Western East Asia in Summer

引用

Advances in atmospheric sciences 2023年第7期40卷 1298-1308页

作者： Sining LING Riyu LU Hao LIU Yali YANG state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary sciences University of Chinese Academy of SciencesBeijing 100049China Department of atmospheric sciences Yunnan UniversityKunming 650504China

The interannual meridional displacement of the upper-tropospheric westerly jet over the eastern portion of East Asia in summer has been well *** study,however,investigates the interannual meridional displacement of the westerly jet over the western portion of East Asia in summer,which is distinct from its eastern *** results show that the meridional displacement of the western East Asian jet shows a clear asymmetric feature;that is,there are remarkable differences between the southward and northward displacement of the *** southward displacement of the jet corresponds to suppressed convection in the tropical western North Pacific and Maritime Continent and enhanced convection in the equatorial Pacific,which can be explained by the warmer sea surfaces found in the northern Indian Ocean and equatorial eastern *** tropical anomalies somewhat resemble those associated with the eastern East Asian jet ***,the northward displacement of the western East Asian jet does not correspond to significant convection and SST anomalies in the entire tropics;instead,the northward displacement of the jet corresponds well to the positive phase of the Arctic ***,the meridional displacement of the western jet has asymmetric impacts on rainfall and surface air temperatures in East *** the western jet shifts northward,more precipitation is found over South China and Northeast China,and higher temperatures appear in northern *** contrast,when the jet shifts southward,more precipitation appears over the East Asian rainy belt,including the Yangtze River valley,South Korea,and southern and central Japan and warmer temperatures are found South and Southeast Asia.

关键词： westerly jet East Asia tropical convection Arctic Oscillation summer

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

The Concurrent Record-breaking Rainfall over Northwest India and North China in September 2021

引用

Advances in atmospheric sciences 2023年第4期40卷 653-662页

作者： Ying NA Riyu LU Beijing Municipal Climate Center Beijing 100089China state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary sciences University of the Chinese Academy of SciencesBeijing 100049China

Extremely heavy rainfall occurred over both Northwest India and North China in September *** precipitation anomalies were 4.1 and 6.2 times interannual standard deviation over the two regions,respectively,and broke the record since the observational data were available,i.e.,1901 for India and 1951 for *** this month,the Asian uppertropospheric westerly jet was greatly displaced poleward over West Asia,and correspondingly,an anomalous cyclone appeared over *** anomalous cyclone transported abundant water vapor into Northwest India,leading to the heavy rainfall *** addition,the Silk Road pattern,a teleconnection pattern of upper-level meridional wind over the Eurasian continent and fueled by the heavy rainfall in Northwest India,contributed to the heavy rainfall in North *** study emphasizes the roles of atmospheric teleconnection patterns in concurrent rainfall extremes in the two regions far away from each other,and the occurrence of rainfall extremes during the post-or pre-monsoon period in the northern margins of monsoon regions.

关键词： extreme precipitation Northwest India North China westerly jet Silk Road pattern

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

Distinct intensity of 10-30-day intraseasonal waves over the North Pacific between early and late summers

引用

atmospheric and Oceanic Science Letters 2022年第4期15卷 27-31页

作者： Lei Du Riyu Lu state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary sciences University of the Chinese Academy of SciencesBeijingChina

我们之前的研究工作表明,夏季北太平洋上空存在主导周期为10-30天的季节内波列,波列纬向分布于上层西风急流带中,并通过斜压能量转换从基本气流获取能量得到发展和维持.由于西风急流在前夏(6月1日–7月7日)明显强于后夏(7月8日–8月31... 详细信息

我们之前的研究工作表明,夏季北太平洋上空存在主导周期为10-30天的季节内波列,波列纬向分布于上层西风急流带中,并通过斜压能量转换从基本气流获取能量得到发展和维持.由于西风急流在前夏(6月1日–7月7日)明显强于后夏(7月8日–8月31日),因而,在本研究中,我们着重研究了波列在前,后夏的不同特征.研究结果表明,波列强度在前夏明显强于后夏,其原因在于波列在前夏能够通过斜压能量转换从更强的西风中获取更多的能量.

关键词：次季节变化季节内振荡波列斜压能量转换纬向北太平洋

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

Coupling of the Calculated Freezing and Thawing Front Parameterization in the Earth System Model CAS-ESM

引用

Advances in atmospheric sciences 2023年第9期40卷 1671-1688页

作者： Ruichao LI Jinbo XIE Zhenghui XIE Binghao JIA Junqiang GAO Peihua QIN Longhuan WANG Si CHEN state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary sciences University of Chinese Academy of SciencesBeijing 101408China School of Mathematics and Statistics Nanjing University of Information Science and TechnologyNanjing 210044China

The soil freezing and thawing process affects soil physical properties,such as heat conductivity,heat capacity,and hydraulic conductivity in frozen ground regions,and further affects the processes of soil energy,hydrology,and carbon and nitrogen *** this study,the calculation of freezing and thawing front parameterization was implemented into the earth system model of the Chinese Academy of sciences(CAS-ESM)and its land component,the Common Land Model(CoLM),to investigate the dynamic change of freezing and thawing fronts and their *** results showed that the developed models could reproduce the soil freezing and thawing process and the dynamic change of freezing and thawing *** regionally averaged value of active layer thickness in the permafrost regions was 1.92 m,and the regionally averaged trend value was 0.35 cm yr–*** regionally averaged value of maximum freezing depth in the seasonally frozen ground regions was 2.15 m,and the regionally averaged trend value was–0.48 cm yr–*** active layer thickness increased while the maximum freezing depth decreased year by *** results contribute to a better understanding of the freezing and thawing cycle process.

关键词： frozen ground freezing and thawing fronts maximum freezing depth active layer thickness earth system model CAS-ESM

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

Simulations of the 100-hPa South Asian High and Precipitation over East Asia with IPCC Coupled GCMs

引用

Advances in atmospheric sciences 2006年第3期23卷 375-390页

作者：周宁芳俞永强钱永甫 Department of atmospheric sciences state key laboratory of numerical modeling for atmospheric sciences and geophysical fluid dynamics

The South Asian High （SAH） and precipitation over East Asia simulated by 11 coupled GCMs associated with the forthcoming Intergovernmental Panel on Climate Change＇s （IPCC） 4th Assessment Report are evaluated. The seasonal behavior of the SAH is presented for each model. Analyses of the results show that all models are able to reproduce the seasonal cycle of the SAH. Locations of the SAH center are also basically reproduced by these models. All models underestimate the intensity and the extension of coverage in summer. The anomalous SAH can be divided into east and west modes according to its longitudinal position in summer on the interannual timescale, and the composite anomalies of the observed precipitation for these two modes tend to have opposite signs over East Asia. However, only several coupled GCMs can simulate the relationship between rainfall and SAH similar to the observed one, which may be associated with the bias in simulation of the subtropical anticyclone over the West Pacific （SAWP） at 500 hPa. In fact, it is found that any coupled GCM, that can reproduce the reasonable summer mean state of SAWP and the southward （northward） withdrawal （extension） for the east （west） mode of SAH as compared to the observed, will also simulate similar rainfall anomaly patterns for the east and west SAH modes over East Asia. Further analysis indicates that the observed variations in the SAH, SAWP and rainfall are closely related to the sea surface temperature （SST） over the equatorial tropical Pacific. Particularly, some models cannot simulate the SAWP extending northward in the west mode and withdrawing southward in the east mode, which may be related to weak major E1 Nifio or La Nifia events. The abilities of the coupled GCMs to simulate the SAWP and ENSO events are associated partly with their ability to reproduce the observed relationship between SAH and the rainfall anomaly over East Asia.

关键词： South Asian High East Asian summer rainfall Coupled GCMs

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：