检索结果-南通市图书馆

Impact of Antecedent Soil Moisture Anomalies over the Indo-China Peninsula on the Super Meiyu Event in 2020

Journal of Meteorological Research 2023年第2期37卷 234-247页

作者： Yinshuo Dong Haishan Chen Xuan Dong Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing210044 School of Atmospheric Sciences Nanjing University of Information Science&TechnologyNanjing210044

In the summer of 2020,a super Meiyu event occurred in the Yangtze River basin(YRB),causing enormous economic losses and human casualties.Recent studies have investigated the possible causes of this super Meiyu event from the perspective of anomalous atmospheric circulation activities and sea surface temperature(SST)anomalies;however,the influence of land surface processes has not garnered considerable attention.This study investigates the possible contributions of land surface processes to this extreme event based on observational analysis and numerical simulations,and shows that antecedent soil moisture(SM)anomalies over the Indo-China Peninsula(ICP)may have had a vital influence on the super Meiyu in 2020.Negative SM anomalies in May over the ICP increased the surface temperature and sensible heat flux.The“memory”of soil allowed the anomalies to persist into the Meiyu period.The heating of the lower atmosphere by the surface strengthened the western Pacific subtropical high,which caused an anomalous anticyclone from the ICP to Northwest Pacific and thus enhanced the southwesterly winds and vertical motion over the YRB.Consequently,the water vapor flux and convergence were strengthened.Sensitivity experiments based on the Weather Research and Forecasting(WRF)model further confirmed the results of observational analysis and indicated that the warm air heated by the ICP surface significantly warmed the lower troposphere from the ICP to Northwest Pacific under the influence of the background wind,thus increasing the geopotential height and inducing an anticyclone.The results of the sensitivity experiments showed that the SM anomalies in May over the ICP increased the precipitation by 10.6%from June to July over the YRB.These findings can improve our understanding of the mechanism of the super Meiyu event in 2020 and facilitate the prediction of extreme Meiyu events.

关键词： super Meiyu soil moisture Indo-China Peninsula surface heating

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

Enhanced Seasonal Predictability of Spring Soil Moisture over the Indo-China Peninsula for Eastern china Summer Precipitation under Non-ENSO Conditions

引用

Advances in Atmospheric Sciences 2023年第9期40卷 1632-1648页

作者： Chujie GAO Gen LI College of Oceanography&State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China Key Laboratory of Meteorological Disaster Ministry of Education(KLME)&Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China

Seasonal prediction of summer precipitation over eastern china is closely linked to the East Asian monsoon circulation,which is largely affected by the El Niño-Southern Oscillation(ENSO).In this study,results show that spring soil moisture(SM)over the Indo-China Peninsula(ICP)could be a reliable seasonal predictor for eastern china summer precipitation under non-ENSO conditions.When springtime SM anomalies are present over the ICP,they trigger a structured response in summertime precipitation over most of eastern china.The resultant south-to-north,tri-polar configuration of precipitation anomalies has a tendency to yield increased(decreased)precipitation in the Yangtze River basin and decreased(increased)in South and North china with a drier(wetter)spring soil condition in the ICP.The analyses show that ENSO exerts a powerful control on the East Asian circulation system in the ENSO-decaying summer.In the case of ENSO forcing,the seasonal predictability of the ICP spring SM for eastern china summer precipitation is suppressed.However,in the absence of the influence of ENSO sea surface temperature anomalies from the preceding winter,the SM anomalies over the ICP induce abnormal local heating and a consequent geopotential height response owing to its sustained control on local temperature,which could,in turn,lead to abnormal eastern china summer precipitation by affecting the East Asian summer monsoon circulation.The present findings provide a better understanding of the complexity of summer climate predictability over eastern china,which is of potential significance for improving the livelihood of the people.

关键词： summer precipitation El Niño-Southern Oscillation soil moisture Indo-China Peninsula eastern china East Asian summer monsoon

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

Tracing Escaping Structure in the Northern Indo-China Peninsula by Openness and Remote Sensing

引用

Journal of Earth Science 2017年第1期28卷 147-160页

作者： Jie Zhang Qinglai Feng Zhi Zhang State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Nanjing Center China Geological Survey School of Earth Sciences China University of GeosciencesWuhan

The Openness based on DEM emphasizes the terrain convexity and concavity. It facilitates the interpretation of detailed landforms on the Earth＇s surface. Compared with the layer stacking of ETM＋ with less three-dimensionality and visualizability and with indefinite details of linear images in the deep cutting or deep covered region, the Openness is used for accurate interpretation of tectonic geomorphic units and linear structures. In this paper, the ETM＋ images（741 RGB） and RRIM based on Openness combined with the field geological investigation are used to trace the escaping structure in SE Asia. The east boundary is Ailaoshan shear zone and the west boundary is Uttaradit-Dien Bien Phu fault, which together form the southwards extruding wedge block. The arc boundary surface of the southern Khorat Plateau is jutted to the north. The NW and NE sides of Khorat Plateau are traversed by Uttaradit-Dien Bien Phu fault and Thakhek-Da Nang fault, respectively, resulting in a blocked escaping structure. The SE margins of Truong Son structure belt and Song Ma structure belt are both arcs jutting to SE. These arc structures clamped by faults or related to the fault on one side indicating the material flow direction obviously, are the most specific manifestation of escaping structures. Moreover, these push units are extruded from south to north successively.

关键词： Openness Indo-China Peninsula escaping structure remote sensing.

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

Establishment of the South Asian High over the Indo-China Peninsula During Late Spring to Summer

引用

Advances in Atmospheric Sciences 2017年第2期34卷 169-180页

作者： Lijuan WANG Aiguo DAI Shuaihong GUO Jing GE Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Science and Technology Innovation Team on Climate Simulation and Forecast Nanjing University of Information Science and Technology Department of Atmospheric and Environmental Sciences University at AlbanySUNY National Center for Atmospheric Research Meteorological Observatory of No.95147 Unit of PLA

The establishment of the upper-level South Asian high(SAH) over the Indo-China Peninsula(ICP) during late boreal spring and its possible causes are investigated using long-term NCEP–NCAR and ERA-40 reanalysis and satellite-observed OLR data. Results show that, from early March to mid-April, deep convection stays south of ～6?N over the northern Sumatran islands. As the maximum solar radiation moves over the latitudes of the ICP(10?–20?N) in late April, the air over the ICP becomes unstable. It ascends over the ICP and descends over the adjacent waters to the east and west. This triggers deep convection over the ICP that induces large latent heating and strong updrafts and upper-level divergence, leading to the formation of an upper-level anticyclonic circulation and the SAH over the ICP. During early to mid-May, deep convection over the ICP intensifies and extends northwards to the adjacent waters. Strong latent heating from deep convection enhances and maintains the strong updrafts and upper-level divergence, and the SAH is fully established by mid-May. Thus, the seasonal maximum solar heating and the land–sea contrast around the ICP provide the basic conditions for deep convection to occur preferentially over the ICP, which leads to the formation of the SAH over the ICP from late April to mid-May. Simulations using Reg CM4 also indicate that the diabatic heating over the ICP is conducive to the generation and development of upperlevel anticyclonic circulation, which leads to an earlier establishment of the SAH.

关键词： South Asian high Indo-China Peninsula diabatic heating deep convection

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

Mechanism of Thermal Features over the Indo-China Peninsula and Possible Effects on the Onset of the South china Sea Monsoon

引用

Advances in Atmospheric Sciences 2002年第5期19卷 885-900页

作者：张耀存钱永甫 Department of Atmosphcric Sciemcs Nanjing UniverMty Nanjing 210093

The thermal characteristics during the South china Sea (SCS) summer monsoon onset period near the Indo-China Peninsula are analyzed by using the South china Sea Monsoon Experiment (SCSMEX) reanalysis data from 1 May to 31 August 1998 and the NCEP/ NCAR pentad-mean reanalysis data from January 1980 to December 1995. The possible relationships between the anomaly of thermal features near the Indo-China Peninsula and the SCS monsoon onset are investigated, and the mechanism causing the SCS summer monsoon onset is also discussed. Results from the 1998 SCSMEX reanalysis data show that there exists a strong persistent surface sensible heating near the Indo-China Peninsula prior to the SCS monsoon onset, which has apparent low frequency oscillation features. This sensible healing leads lo a warmer center in the lower atmosphere near the Indo-China Peninsula and strong local horizontal temperature and geopotential height gradients which are favorable to strengthening the southwest wind over the Indo-China Peninsula. It is also found that stronger convergent winds at lower levels and stronger divergent winds at high levels appear, which provide a favorable configuration for the development of vertical motion, enhancement of precipitation, and onset of the SCS monsoon. These results can be verified by analysis of the multi-year mean data. Additionally, it is found that the temperature at 850 hPa increases more rapidly over the Indo-China Peninsula than the South china Sea prior to the SCS monsoon onset, which leads to a strengthening of the temperature difference between the Indo-China Peninsula and the South china Sea. Moreover, results from the analysis of the longitudinal temperature and geopotential height differences show that the eastern retreat of the subtropical high over the Indo-China Peninsula during the period of SCS monsoon onset is associated with the temperature increase over the Indo-China Peninsula and the eastern extension of low trough over the Bay of Bengal.

关键词： Indo-China Peninsula thermal feature mechanism of SCS monsoon onset

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

试析21世纪初金三角地区替代发展及其面临的挑战

引用

国际政治 2010年第11期 33-40,69页

作者：陈锴

替代发展是一种以可持续的合法经济替代毒品经济的长期经济发展战略。替代发展以相关国家政府与国际组织的长期政治、经济承诺为前提，针对毒品作物种植地区的贫困人群，借助因地制宜的经济发展方式推动区域经济的可持续发展，从而根除... 详细信息

替代发展是一种以可持续的合法经济替代毒品经济的长期经济发展战略。替代发展以相关国家政府与国际组织的长期政治、经济承诺为前提，针对毒品作物种植地区的贫困人群，借助因地制宜的经济发展方式推动区域经济的可持续发展，从而根除毒品作物种植以及毒品经济赖以存续的基础。随着金三角地区“替代发展”的深入展开，部分负面因素也随之凸显，其中缅北跨界民族武装的负面影响以及该地区罂粟种植的反弹趋势不容小觑。

关键词：替代发展中南半岛跨界民族经济发展战略 alternative development Indo-China Peninsula cross-border ethnicity strategy of economic development

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

Effects of Spring Biomass Burning in the indochina peninsula on May Precipitation in South china

引用

Journal of Water Resource and Protection 2023年第5期15卷 179-193页

作者： Qianqian Mao Shuyu Liu Yu Huang School of Atmospheric Sciences Nanjing University of Information Science and Technology Nanjing China

Each year, during the dry season that precedes the summer wind and rainfall Indo-China Peninsula (ICP), significant biomass burning occurs and reaches its peak from March to April. This biomass burning generates large amounts of aerosols that impact East Asia and surrounding areas through the Asian monsoon. This study aims to investigate the potential connection between biomass burning over the ICP and precipitation in South china during May, along with the physical processes involved. The analysis is based on GLDAS soil moisture reanalysis data and CPC (NOAA) precipitation data covering the period from 1980 to 2021. The research findings indicate a negative (positive) correlation between biomass burning in the ICP region during spring and precipitation in the same region (South china) during May. The circulation patterns corresponding to years with biomass-burning emission anomalies are further investigated, and the impact of biomass-burning emissions in spring on soil moisture and temperature is examined. The results suggest that biomass-burning emissions can significantly affect atmospheric circulation and precipitation, ultimately leading to anomalous precipitation in South china.

关键词： Indo-China Peninsula Biomass-Burning Aerosols Atmospheric Circulation Precipitation

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

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

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

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：