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Modeling the climate effects of different subregional uplifts within the Himalaya-Tibetan Plateau on Asian summer monsoon evolution

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Chinese Science Bulletin 2012年第35期57卷 4617-4626页

Considering the different uplifting time of different subregions of the Himalaya-Tibetan Plateau(TP),a series of numerical simulations have been conducted with the Community Atmosphere Model(CAM4. developed at the National Center for atmospheric Research to explore the effects of the phased tectonic uplift of the Himalaya-TP on the evolution of Asian summer *** results show that the uplifts of the Himalaya and northern TP significantly affect the evolutions of South Asian summer monsoon and northern East Asian summer monsoon *** is,the tectonic uplift of the Himalaya intensifies the South Asian summer monsoon circulation and increases the precipitation in South Asia,whereas the uplift of the northern TP intensifies the northern East Asian summer monsoon circulation and increases the precipitation in northern East *** with previous simulations,current comparative analyses of modeling results for different subregional uplifts within the Himalaya-TP help deepen our understanding of the evolutionary history of Asian monsoons.

关键词：青藏高原隆升喜马拉雅亚洲季风高原气候夏季季风次区域隆起演化建模

Spin-glass like behaviors in La_(1-x)Tb_xMnO_3.perovskite

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Science china(physics,Mechanics & Astronomy) 2009年第12期52卷 1893-1897页

作者： ZHANG YingTang1,2.3.WANG ChunChang2.4.LIU WeiBin1,WANG Zhong3.LU HuiBin2.& CHEN ZiYu1 1 Department of physics,beijing University of Aeronautics and Astronautics,beijing 100191 2.institute of physics & Center for Condensed Matter physics,Chinese Academy of Sciences,beijing 100190 3.School of Material Science & Engineering,Shaanxi University of Technology,Hanzhong 72.0}03.4.institute of Superconducting and Electronic Materials,Wollongong University,Northfield Ave,Gwynneville,NSW 2.2.,Australia 1. Department of physics Beijing University of Aeronautics and Astronautics Beijing 100191 China 2. institute of physics & Center for Condensed Matter physics Chinese Academy of Sciences Beijing 100190 China 3. School of Material Science & Engineering Shaanxi University of Technology Hanzhong 723003 China 4. institute of Superconducting and Electronic Materials Wollongong University Northfield Ave Gwynneville NSW 2522 Australia

A series of samples of La1-xTbxMnO3.(0≤x≤0.15) are prepared. The static and dynamic magnetizations of La1-xTbxMnO3.have been investigated. The results indicate that the spins with the short-range order are frozen into random direction at low enough temperatures which leads to the samples exhibiting the spin-glass like behavior. It is considered that the spin-glass like behavior originates from the competition between ferromagnetic double exchange among Mn3. and Mn2. and antiferromagnetic superex-change among Mn3. and Mn3.,as well as Tb3. and Tb3..

关键词： La1-xTbxMnO3 spin-glass-like behavior short-range order

Research progress in the inner surface modification of metal tubes by plasma processing

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Progress in Natural Science:Materials International 2006年第11期16卷 1119-1126页

作者： ZHANG Guling~ 1,2.**, WU Xingfang~1, GU Weichao~2. CHEN Guangliang~2. FENG Wenran~2. NIU Erwu~2. LI Li~2. L Guohua~2. CHEN Huan~2. FAN Songhua~2. LIU Chizi~2.and YANG Size~2.1. School of Material Science and Engineering, University of Science and Technology beijing, beijing 10008{2. china 2. beijing National Laboratory for Condensed Matter {4., institute of {4., Chinese Academy of Sciences, beijing 100080, china) School of Material Science and Engineering University of Science and Technology Beijing Beijing 100083 China beijing National Laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The recent progress in inner surface hardening of tubes by plasma processing is summerized. Several techniques of inner surface plasma source ion implantation and deposition are introduced, and their advantages and disadvantages are discussed. The basic principles, technical features and new progress of inner surface plasma source ion implantation methods for metal tubes, which were developed in our laboratory, are described in detail. And perspectives of the future technical development for inner surface ion implantation of tubes are presented.

关键词： PSII metal tubes inner surface surface modification.

Investigation into the rotational bands of ^(185)Pt with the particle-rotor model

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 114-118页

作者： LI GuangShun1,2. ZHOU XiaoHong1,2. ZHANG ShuangQuan3. ZHANG YuHu1 & MENG Jie3.1 {2. of Modern physics, Chinese Academy of Sciences, Lanzhou 73.000, china 2.Graduate University of Chinese Academy of Sciences, {3. 10004., china 3.School of physics and SK Laboratory of Nuclear physics & Technology, Peking University, {3. 100871, china 1. institute of Modern physics Chinese Academy of Sciences Lanzhou 730000 China 2. Graduate University of Chinese Academy of Sciences Beijing 100049 China 3. School of physics and SK Laboratory of Nuclear physics & Technology Peking University Beijing 100871 China

Theoretical calculations have been performed for the ν9/2.[62.0}(i13.2. and ν7/2.[503.(f7/2. bands of 185Pt in the framework of particle-rotor model. The band properties of signature splitting and configuration mixing have been analyzed. The level energy and signature splitting before the band crossing can be well interpreted by introducing triaxiality. The positive-parity yrast band is pro posed to be dominated by the ν9/2.[62.0}(i13.2. component, while the negative-parity band shows strong mixing of ν7/2.[503.(f7/2. and ν9/2.[505](h9/2. configurations.

关键词： High-spin states particle-rotor model signature splitting configuration mixing

Simulation of the future change of East Asian monsoon climate using the IPCC SRES A2.and B2.scenarios

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Chinese Science Bulletin 2003年第10期48卷 1024-1030页

作者： BUEH Cholaw LASG, institute of atmospheric {2., Chinese Academy of Sciences, {3., {4. LASG Institute of Atmospheric Physics Chinese Academy of Sciences China

In this paper, we applied the newest emission scenarios of the sulfur and greenhouse gases, i.e. Intergovernmental Panel on Climate Change (IPCC) Special Report on Emission Scenarios (SRES) A2.and B2.scenarios, to investigating the change of the East Asian climate in the last three decades of the 2.st century with an atmosphere-ocean coupled general circulation model. The global warming enlarges the land-sea thermal contrast and, hence, enhances (reduces) the East Asian summer (winter) monsoon circulation. The precipitation from the Yangtze and Huaihe river valley to North china increases significantly. In particular, the strong rainfall increase over North china implies that the East Asian rainy area would expand northward. In addition, from the southeastern coastal area to North china, the rainfall would increase significantly in September, implying that the rainy period of the East Asian monsoon would be prolonged about one month. In July, August and September, the interannual variability of the precipitation enhances evidently over North china, meaning a risk of flooding in the future.

关键词：模拟亚洲东方季风气侯变化大气循环模型

Complete multiple round quantum dense coding with quantum logical network

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Chinese Science Bulletin 2007年第9期52卷 1162-1165页

作者： LI ChunYan1,2.LI XiHan1,2.DENG FuGuo1,2.3.ZHOU Ping1,2.& ZHOU HongYu1,2.3.1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,{2. Normal University,{2. 100875,china 2.{3. of Low Energy Nuclear {4.,and Department of Material Science and Engineering,{2. Normal University,{2. 100875,china 3.{2. Radiation Center,{2. 100875,china Key Laboratory of Beam Technology and Material Modification of Ministry ofEducation Beijing Normal University Beijing 100875 China

We present a complete multiple round quantum dense coding scheme for improving the source ca-pacity of that introduced recently by Zhang et al. The receiver resorts to two qubits for storing the four local unitary ope... 详细信息

关键词：量子通信多重量子紧凑编码量子逻辑网络量子纠缠

A subsurface runoff parameterization with water storage and recharge based on the Boussinesq-Storage Equation for a Land Surface Model

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Science china Earth Sciences 2006年第6期49卷 622-631页

作者： TIAN Xiangjun1,2. XIE Zhenghui1, ZHANG Shenglei1 & LIANG Miaoling1 1. LASG, institute of atmospheric {2., Chinese Academy of Sciences, {3., {4. 2. Graduate School of the Chinese Academy of Sciences, beijing 10003., {4. 1. LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China 2. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Subsurface runoff in a land surface model is usually parameterized as a single-valued function of total storage in a basin aquifer reservoir. This kind of parameterization is often sin-gle-valued function of storage-discharge under a steady or “quasi-steady” state, which cannot rep-resent the influence of aquifer recharge on subsurface runoff generation. In this paper, a new sub-surface runoff parameterization with water storage and recharge based on the Boussinesq-storage equation is developed. This model is validated by a subsurface flow separation algorithm for an ex-ample river basin, which shows that the new model can simulate the subsurface flow reasonably.

关键词： Zsubsurface runoff parameterization Boussinesq-storage equation waterstorage and recharge

Rainfall spectrum change in North china and its possible mechanism

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Progress in Natural Science:Materials International 2004年第7期 46-52页

作者： DAI Xingang 1,2.*, WANG Ping 3. ZHANG Peiqun 4.and CHOU Jifan 1(1. College of Resources and Environmental Sciences, Lanzhou University, Lanzhou 73.000, china 2. State Key Laboratory LASG, institute of {3. physics, Chinese Academy of Sciences, {4., china 3. College of physics, Peking University, beijing 100871, china 4. National Climate Center, beijing 100081, china) College of Resources and Environmental Sciences，Lanzhou University，Lanzhou 73.000，china State Key Laboratory LASG，institute of atmospheric {2.，Chinese Academy of Sciences，{3.，{4. College of physics，Peking University，beijing 100871，{2. National Climate Center，beijing 100081，china College of Resources and Environmental Sciences，Lanzhou University，Lanzhou 73.000，china

The seasonal distribution of the rainfall in North china has changed greatly since 1977, with more rainfall in spring and less in July, August, and September (JAS). Wavelet analysis showed that the JAS rainfall underwent an abrupt spectrum change in the mid-1960s. Its interannual variability has declined while the interdecadal component has become the dominant mode, associated with the dry climate. Correlation analysis found that the JAS rainfall is negatively correlated with the departures of the 500 hPa geopotential height significantly over the northwest and southwest of china, and positively correlated with the summer monsoon over eastern china. Therefore, the interdecadal ascending of the air pressure in northwestern china and the monsoon decaying over East Asia in the past 2. years may be the two major causes of North china drought.

关键词： North china drought wavelet spectrum abruption monsoon geopotential height interdecadal change.

Study of ozone “weekend effect” in Shanghai

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Science china Earth Sciences 2008年第9期51卷 1354-1360页

作者： TANG WenYuan1↑, ZHAO ChunSheng1, GENG FuHai1,2. PENG Li2. ZHOU GuangQiang2. GAO Wei2. XU JianMing2.& TIE XueXi2.3.1 Department of atmospheric Science, School of {2., Peking University, beijing 100871, {3. 2.atmospheric Chemistry Laboratory of Shanghai Meteorological Bureau, Shanghai 2.003., {3. 3.atmospheric Chemistry Division, NCAR, Boulder CO 803.1, USA 1. Department of atmospheric Science School of Physics Peking University Beijing 100871 China 2. atmospheric Chemistry Laboratory of Shanghai Meteorological Bureau Shanghai 200030 China 3. atmospheric Chemistry Division NCAR Boulder CO 80301 USA

Analysis of observed ozone data in 2.06 from five monitoring sites (Xujiahui, Chongming, Baoshan, Pudong, Jinshan) in Shanghai reveals that ozone (O_3. concentrations in Xujiahui are higher at week-ends than those on weekdays, despite the fact that emissions of ozone precursor substances, such as oxides of nitrogen (NOx), carbon monoxide (CO) and volatile organic compounds (VOCs) are lower at weekends than those on weekdays. The possible chemical cause of ozone "weekend effect" is that NO_2.NO ratio increases at weekends by 2..61% compared with those on weekdays. In addition, because of an average 12.13. reduction in NOx (NO + NO_2. in the early morning (05:00-09:00) at weekends compared with that on weekdays, the ozone inhibition period ends 0.5 h earlier at weekends resulting in the longer duration of ozone accumulation and the higher ozone production rate. The rate of ozone production is a function of VOCs and NOx in the atmosphere. VOCs/NOx ratio in Xujiahui is {2.55 at weekends, and {2.3. on weekdays, belonging to the "NOx-limited". The increasing VOCs/NOx ratio at weekends leads to ozone enhancement from 73.ppbv to 80 ppbv, which are consistent with ozone "weekend effect" in Xujiahui. Furthermore, combining with MICAPS cloud amount data, the fact that ozone "weekend effect" in Xujiahui weakens gradually along with the increasing of cloud amount indicates that ozone photochemical production leads to ozone "weekend effect" in Xujiahui of Shanghai.

关键词： Shanghai ozone photochemical pollution "weekend effect"