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A quasi-geostrophic wavelet-spectrum model for barotropic atmosphere and its numerical solution

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Progress in Natural Science:Materials International 2004年第11期 48-54页

作者： DAI Xingang 1,2*, wang Ping 3 and CHOU Jifan 2 (1. Key Laboratory of Regional Climate-Environment for Temperate East Asia, institute of atmospheric physics, chinese academy of sciences, START Regional Center for Temperate East Asia, beijing 100029, china 2. Department of atmospheric sciences, Lanzhou University, Lanzhou 730000, china 3. College of physics, Peking University, beijing 100871, china) KeyLaboratoryofRegionalClimate-EnvironmentforTemperateEastAsia InstituteofAtmosphericPhysicsChineseAcademyofSciencesSTARTRegionalCenterforTemperateEastAsiaBeijing100029China Collegeofphysics PekingUniversity.Beijing100871China Departmentofatmosphericsciences LanzhouUniversityLanzhou730000.China

A quasi-geostrophic wavelet-spectrum model of barotropic atmosphere has been constructed by wavelet-Galerkin method with the periodic orthogonal wavelet bases. In this study a wavelet grid-spectrum transform method is designed to decrease the tremendous computation of the nonlinear interaction term in the model, and a two-dimensional Helmholtz equation from the model in a wavelet spectrum form is derived, and a solution with high precision under the periodic boundary condition is obtained. The numerical investigation manifests that the wavelet-spectrum model (WSM) could keep on running for a long time under the forcing of heating and topography. Although its numerical solution is compatible with the grid model (GM), the WSM is of a higher precision and faster convergence rate than GM's. A stationary solution comes forth when the model is forced only by the surface heating, whereas a quasi-periodic oscillation with a period about 15 days appears as considering the topography in the model. The latter oscillation, to some extent, is very similar to the Rossby index cycle of atmosphere over middle and high latitudes.

关键词： plane barotropic atmosphere wavelet-spectrum model wavelet grid-spectrum transform.

A Global transport Model of Dust (GMOD) and its simulation on the dust aerosol distribution

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A Global transport Model of Dust (GMOD) and its simulation o...

中国气象学会2008年年会大气环境监测、预报与污染物控制分会场

作者： Xu Yue1,2, huijun wang1, Zifa wang1 and Ke Fan11Nansen-Zhu International Research Center, institute of atmospheric physics, chinese academy of sciences, beijing, china. 2Graduate School of the chinese academy of sciences, beijing, china.

A new global three-dimensional transport model of mineral dust aerosols is developed and evaluated. The dust model is embedded in a general circulation model with conservative dynamical core and unique consideration of the polar transportation, which make the model stable in simulations. Comprehensive parameterizations of the emission and deposition processes from wang et al. [2000] are modified to match the surface conditions and meteorological fields of the climate model. A 20-year simulation from the dust model gives an estimation of dust mobilization of 1974 ± 30 Tg yr-1 and a global dust burden of about 25 Tg for the particles smaller than 10 μm. The vertical distribution, temporal variation on different time scales and surface concentration of the simulated mineral dust aerosols are compared with both observations and simulations from other models. The evaluation results show that the new dust model has the ability to reproduce the principal features of global dust transportation. The main deficiency of the model is the underestimation of the dust activity in East Asia during spring and the overestimation of the concentration in Central Pacific, which have also been reported by other model simulations. The global mean optical thickness of dust at 0.63 μm is 0.028 ± 0.004 in the model, which is comparable to the magnitude of sulphate aerosols. Such result indicates that both anthropogenic and natural sources need to be considered when evaluating the climate feedback of aerosols.

关键词： mineral dust aerosols, transport model, emission and deposition, optical thickness

Great progress in study on aerosol and its impact on the global environment

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Progress in Natural Science:Materials International 2002年第6期 9-15页

作者： ZHUANG Guoshun, HUANG Ronghui, wang Mingxing, Q. ZHOU, GUO Jinghua, YUAN Hui and RAO Zhiming(1. The Center for atmospheric Environmental Study, beijing Normal University, beijing 100875, china 2. The institute of atmospheric physics, chinese academy of sciences, beijing 100029, china 3. University of New Mexico, Albuquerque, NM 87131, USA 4. Zhangzhou Teachers College, Zhangzhou 363000, china) The Center for atmospheric Environmental Study，beijing Normal University，beijing 100875，china The institute of atmospheric physics，chinese academy of sciences，beijing 100029，china The institute of atmospheric physics，chinese academy of sciences，beijing 100029，china The Center for atmospheric Environmental Study，beijing Normal University，beijing 100875，china University of New Mexico，Albuquerque，NM 87131，USA The Center for atmospheric Environmental Study，beijing Normal University，beijing 100875，china The Center for atmospheric Environmental Study，beijing Normal University，beijing 100875，china Zhangzhou Teachers College，Zhangzhou 363000，china

The transport from atmosphere is a more important pathway than that from rivers for certain elements and compounds in the remote ocean. The desert and those arid/semi-arid areas in the northwest of china and the Loess Plateau are the sources of those aerosols over the Pacific. atmospheric iron is the limiting factor of the productivity in certain ocean regions. The dust storms must now be seen as repeated sources of pollution elements as well as soil elements to the East china Sea and, farther out, to the North Pacific Ocean and even to the USA. The long-range transport of aerosols, especially the dust storm, from china and the positive feedbacks of iron coupled with sulfur in atmosphere might be one of the important mechanisms that would affect the primary productivity in the Pacific and/or the global climate change and deserve to be further studied. It can be seen clearly that the dust storms would affect not only the health of human beings and the local or regional climate, but also the global climat

关键词： aerosol dust storm global environmental change global biogeochemical cycle.

Regularizing active set method for retrieval of the atmospheric aerosol particle size distribution function

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Regularizing active set method for retrieval of the atmosphe...

中国科学院地质与地球物理研究所2008学术年会

作者： Yanfei wang~* and Changchun Yang institute of Geology and Geophysics,chinese academy of sciences,P.O.Box 9825,beijing,100029,china

The determination of flues aerosol particle size distribution function by using the particle spectrum extinction equation is an ill-posed integral equation of the first kind[***,***.18,188(1975);Y.P. wang,Computational Methods for Inverse Problems and Their Applications(Higher Education Press,2007)], since we are often faced with limited or insufficient observations in remote sensing and the observations are *** overcome the ill-posed nature of the problem,regularization techniques were developed. However,most of the literature focuses on the application of Phillips-Twomey regularization and its variants, which are unstable in several *** is known,the particle size distribution is always nomiegative,and we are often faced with incomplete ***,we study the active set method and propose a regularizing active set algorithm for ill-posed particle size distribution function retrieval and for enforcing nonnegativity in *** numerical tests are based on synthetic data for theoretical simulations and the field data obtained with a CE 318 Sun photometer for the Po Yang lake region of Jiang Xi Province,china,and are performed to show the efficiency and feasibility of the proposed algorithms.

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The Production and Release of CFCs from Coal Combustion

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 81-85页

作者： LI Jiaxi, wang Junzhi, LI Hong, RAO Zhu, LI Qi and LUO Songguang National Research Center of Geoanalysis, chinese academy of Geological sciences, beijing 100037 chinese Acad Geol Sci Natl Res Ctr Geoanal Beijing 100037 Peoples R China

The destruction of the ozone layer in the atmosphere caused by industriallysynthesized CFCs has aroused greatest concerns from the international society, but the CFCs formedfrom burning of coal containing fluorine have not been recognized by the world yet. In the presentstudy, we condensed the gas through cold traps and used the GC-MS to measure the gas composition,and found that the content of CFC-12 in the smog from coal combustion was significantly higher thanthe background value of the local atmosphere. This proves that CFC- 12 is formed in the process ofcoal combustion. This paper discusses a new source of non-synthesized CFCs.

关键词： CFC-12 in coal combustion measurement of CFC-12 halo hydrocarbons fromcoal

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STRUCTURAL　AND　PHOTOELECTRIC　PROPERTIES　OF　A　NOVEL　AMPHIPHILIC　ZINC　PHTHALOCYANINE　MIXED　LB　MULTILAYERS

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影像科学与光化学 1996年第2期 97-100页

作者： LI Hongwu CHEN Tiefeng wang Hanhui ZHOU Qingfu XU huijun(institute of Photographic Chemistry,The chinese academy of sciences, beijing 100101,P.R. china)ZHAO Ring (Key Laboratory for Supermolecule,Jilin University, Changchun, 130023,P. R.china)

ＳＴＲＵＣＴＵＲＡＬＡＮＤＰＨＯＴＯＥＬＥＣＴＲＩＣＰＲＯＰＥＲＴＩＥＳＯＦＡＮＯＶＥＬＡＭＰＨＩＰＨＩＬＩＣＺＩＮＣＰＨＴＨＡＬＯＣＹＡＮＩＮＥＭＩＸＥＤＬＢＭＵＬＴＩＬＡＹＥＲＳ￥ＬＩＨｏｎｇｗｕ；ＣＨＥＮＴｉｅ... 详细信息

ＳＴＲＵＣＴＵＲＡＬＡＮＤＰＨＯＴＯＥＬＥＣＴＲＩＣＰＲＯＰＥＲＴＩＥＳＯＦＡＮＯＶＥＬＡＭＰＨＩＰＨＩＬＩＣＺＩＮＣＰＨＴＨＡＬＯＣＹＡＮＩＮＥＭＩＸＥＤＬＢＭＵＬＴＩＬＡＹＥＲＳ￥ＬＩＨｏｎｇｗｕ；ＣＨＥＮＴｉｅｆｅｎｇ；ＷＡＮＧＨａｎｈｕｉ；Ｚ...

关键词： phthalocyanine LB film FTIR TiO2 nanoparticle photovoltage

Model Analysis of Fine Particle Pollution in beijing during the 2008 Olympic Games

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Model Analysis of Fine Particle Pollution in Beijing during ...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Meigen Zhang 1 ,Lingyun Zhu 1 ,Yuesi wang 1 ,Wenqing Liu 2 1 State Key Laboratory of Boundary Layer physics and atmospheric Chemistry, institute of atmospheric physics,chinese academy of sciences,beijing 100029, china 2 Key Lab of Environmental Optics and Technology,Anhui institute of Optics and Fine Mechanics,chinese academy of sciences,Hefei 230031,china

Concentration distributions of major air pollutants over North china in the period of June-August 2008 were simulated by using a multi-scale air quality modeling system RAMS-CMAQ,and for the evaluation of the model performance,model simulated concentrations of PM2.5,O3 and NOx were compared against observations obtained at 14 stations located in beijing and its neighboring *** shows that modeled concentrations of PM2.5 and O3 agree with observed ones reasonably well, and the model captures major observed time-spatial variations,while large differences between modeled and simulated NOx values are found and the differences may be primarily due to coarse horizontal resolution of the model system as the model can not reflect the reality of the observation ***,the large differences are also associated with uncertainties in NOx emissions. Emission control was enforced in beijing and its neighboring areas for the beijing Olympic *** order to study the impacts of emission control upon PM2.5 and O3 concentrations,their concentrations were recalculated with the emissions without the emission control,and then discussed.

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MeteoInfo: GIS software for meteorological data visualization and analysis

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MeteoInfo: GIS software for meteorological data visualizatio...

强化科技基础推进气象现代化——第29届中国气象学会年会

作者： Y. Q. wang 1 1 Laboratory of atmospheric Chemistry, chinese academy of Meteorological sciences, beijing, china

MeteoInfo is a suite of software tools which has been developed for meteorological data visualization and analysis. It includes a .NET class library for software developers and a desktop application for end users. MeteoInfo also supports several basic GIS functions and can read widely several used meteorological data formats such as NetCDF and GRIB. Complex meteorological analyses of grid and station data can be processed using provided data models. The class library can be used to conveniently develop software routines for manipulating spatial and meteorological data. The desktop application has a user friendly GUI and is a powerful tool to view and examine meteorological data sets. MeteoInfo can also be run automatically using scripting with the IronPython language.

关键词： Meteorological data Visualisation GIS Class library

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320m气象塔太阳辐射梯度观测

太阳能学报 2003年第3期24卷 295-301页

作者：刘广仁王跃思胡非张文胡玉琼中国科学院大气物理研究所CERN/LAPC 北京100029

该文介绍了利用北京 32 0m气象塔进行太阳辐射梯度测量的仪器装置和初步观测结果。实验表明 ,自行设计制造的太阳辐射自动观测系统 (包括自动太阳跟踪器和数据采集系统 )运行可靠 ,可满足观测要求。初步实验观测结果表明 ,地面与 32 0m... 详细信息

该文介绍了利用北京 32 0m气象塔进行太阳辐射梯度测量的仪器装置和初步观测结果。实验表明 ,自行设计制造的太阳辐射自动观测系统 (包括自动太阳跟踪器和数据采集系统 )运行可靠 ,可满足观测要求。初步实验观测结果表明 ,地面与 32 0m高度之间的辐射衰减明显 ,在极晴好天气下太阳直接辐射在中午时段相差仅 10W/m2 左右 ,而在近地面污染严重的条件下其相对差值最大可达 14 0W/m2 左右。在晴好天气下总紫外辐射高空与地面相对差值很小 ;在大气能见度差时总紫外辐射值减少 ,但是高空与地面的差值相对加大。

关键词：辐射梯度观测太阳自动跟踪装置气象塔太阳辐射

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