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Acta Oceanologica Sinica 2003年第4期22卷 569-576页

作者： Gong Jianming1, Chen Jianwen 1, 2. Li Gang1, Zhang Xunhua1, Li Jipeng3. Huang Fulin1 1. Qingdao institute of Marine Geology, Qingdao 2.6071, China. 2. Ocean University of China, Qingdao 2.6003. China 3. Hefei institute of Petroleum Chemical Exploration, China Petroleum Exploration and Development Research institute, Hefei 2.0}02.,China Qingdao institute of Marine Geology Qingdao 266071 China Ocean University of China Qingdao 266003 China Hefei Inst. Petroleum Chem. Explor. China Petroleum Explor./Devmt. Res. Hefei 230022 China

Light hydrocarbon (methane, ethane, propane, butane and CO2. test and C isotopic analysis of CO are conducted for over 100 lower-layer atmospheric samples from the East China Sea slope and the Okinawa Trough. The results show that the lower-layer atmosphere mainly consists of CO2.and then of CH4, and the CO2.concentrations are calculated to have a high average value of 0.87 omega/10(-2. about three times that of the regional background (0-3.omega/10(-2.). The result also shows that the average value of C isotope - 2..8 x 10(-3. is given to the CO2. inferring that it is inorganic gas. Thus, for the future 's work in the Okinawa Trough, special attention should be paid to CO2.hydrate, which is very possibly an important hydrate type.

关键词： lower-layer atmosphere hydrocarbon test C isotopic analysis deep-sea petroleum gas hydrate

Inorganic chemical composition and source signature of PM2.5 in Beijing during ACE-Asia period

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Science Bulletin 2003年第10期48卷 1002-1005页

作者： ZHANG Renjian, XU Yongfu & HAN Zhiwei lapc, institute of atmospheric physics, Chinese Academy of Sciences, Beijing {2., China lapc Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Aerosol samples for PM2.5 were collected in Beijing for 3. consecutive days from March to April 2.01 using an IMPROVE Sampler. Concentrations of 2. elements in PM2.5 were determined using a PIXE method. Results show that the average mineral dust concentration of PM2.5 was 14.6 mg/m3.during the observation period. On the sand-dust event days of March 2. and April 10, dust PM2.5 mass concentrations were 62.4 and 54.1 mg/m3. respectively. These demonstrate that fine particle pollution by dust event in Beijing was very severe. The enrichment factors of S and Cu reached minimums on the dusty days and were high on the non-dusty days. It is considered that enrichment factors of elements in PM2.5, which are associated with human activities, can probably provide an effective method to distinguish local sources from external sources of dust. Factor analysis on the chemical composition in PM2.5 shows that sources of crustal matters, anthropogenic emission, and oil combustion contributed to PM2.5 levels in air in the springtime of 2.01 in Beijing.

关键词： dust ACE-Asia PM2.5 chemical composition source apportionment.

Simulation Experiments of Land Surface Physical Processes and Ecological Effect over Different Underlying Surface

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地球科学进展 2004年第S1期19卷 15-20页

作者： LIU Shu-hua~(1,2., JIANG Hao-yu, HU Fei~2.LIU Hui-zhi~2.LIANG Fu-ming~1, WANG Jiang-hua~1(1. Group of Atmosphere Boundary Layer and turbulence, Ministry Laboratory of Storm and Drought Flood Damage, Department of atmospheric Sciences the School of physics Peking University, Beijing 100871, China 2. State Key Laboratories of Atmosphere physics and Chemistry,{3., Chinese Academy of Science, Beijing 10002., China)

Based on the existing Land Surface Physical Process Models(Deardorff, Dickinson, LIU, Noilhan, Seller, ZHAO), a Comprehensive Land Surface Physical Process Model (CLSPPM) is developed by considering the different physical processes of the earth's surface-vegetation-atmosphere system more completely. Compared with SiB and BATS, which are famous for their detailed parameterizations of physical variables, this simplified model is more convenient and saves much more computation time. Though simple, the feas...

关键词： Comprehensive land surface Physical process model (CLSPPM) Simulation experiment Land surface physical process Ecological effect.

On the parameterization scheme of gravity wave drag effect on the mean zonal flow of mesosphere

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Chinese Science Bulletin 2003年第10期48卷 1020-1023页

作者： GAO Shouting & RAN Lingkun State Key Laboratory of Atmosphere physics and Chemistry (lapc),{2., Chinese Academy of Sciences, Beijing{3., China State Key Laboratory of Atmosphere physics and Chemistry (lapc) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Based on McFarlane抯 parameterization scheme of gravity wave drag, a refined gravity-wave-drag scheme is presented. Both the drag effect of the momentum flux and the dissipation effect of gravity wave breaking on the mean zonal flow are included in the refined parameterization scheme. The dissipation effect can be formulated with the gravity wave numbers and the mean quantities. The refined parameterization scheme may represent a complete drag effect of stationary gravity wave breaking on the mean zonal flow.

关键词：参数化法重力波阻纬向气流中间层大气动力学

Factors governing formation of todorokite at atmospheric pressure

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Science China Earth Sciences 2005年第10期48卷 1678-1689页

作者： CUI Haojie1, FENG Xionghan1, LIU Fan1, TAN Wenfeng1 & HE Jizheng2.1. College of Resources and Environment, Huazhong Agricultural University, Wuhan 43.070, China 2. Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China Huazhong Agricultural University Chinese Academy of Sciences

Todorokite commonly occurs in Earth surface environments. The factors governing formation of todorokite, such as reaction temperature, metal ions, dissolved O2.and pH, were investigated in this paper. Results showed that the forming rate of todorokite and its crystallinity decreased with falling reaction temperature, and the effect of temperature was more significant than that of other parameters. Nature of metal ions in the interlayer of buserite precursor and the structure of the buserite precursor obviously affected buserite transformation into todorokite. Weak bonding between the metal ions and MnO6 layer of buserite was favorable to todorokite formation. The rate of todorokite formation was promoted at a lower temperature with appropriate bubbling of O2. The pH in the system slightly influenced the todorokite formation, and todorokite could also be formed in a weak alkali medium or in a slightly acidic medium. Aged buserite pre-cursor more easily form todorokite than the unaged one.

关键词： todorokite, buserite, manganese oxide mineral, atmospheric pressure, transformation.

Simulating Hydrologic Changes with Climate Change Scenarios in the Haihe River Basin

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Pedosphere 2005年第5期15卷 53-58页

作者： YUAN Fei 1,2. XIE Zheng-Hui1,* 2. LIU Qian1 and XIA Jun 3.1LASG, institute of atmospheric physics, Chinese Academy of Sciences, Beijing {2. (China). 2.College of Water Resources and Environment, Hohai University, Nanjing 2.0098 (China)3.2. of Geographical Science & Natural Resources, Chinese Academy of Sciences, Beijing 100101 (China) institute of atmospheric{2. Chinese Academy of Sciences LASG CAS Beijing 100029 institute of Geographical Science & Natural Resources Chinese Academy of Sciences Beijing 100101

Climate change scenarios, predicted using the regional climate modeling system of PRECIS (providing regional cli-mates for impacts studies), were used to derive three-layer variable infiltration capacity (VIC-3.) land surface model forthe simulation of hydrologic processes at a spatial resolution of 0.2.° × 0.2.° in the Haihe River Basin. Three climatescenarios were considered in this study: recent climate (1961-1990), future climate A2.(1991-2.00) and future climateB2.(1991-2.00) with A2.and B2.being two storylines of future emissions developed with the Intergovernmental Panel onClimate Change (IPCC) special report on emissions scenarios. Overall, under future climate scenarios A2.and B2. theHaihe River Basin would experience warmer climate with increased precipitation, evaporation and runoff production ascompared with recent climate, but would be still likely prone to water shortages in the period of 2.3.-2.70. In addition,under future climate A2.and B2. an increase in runoff during the wet season was noticed, indicating a future rise in theflood occurrence possibility in the Haihe River Basin.

关键词： climate change regional climate modeling system runoff VIC-3. model

Multisymplectic five-point scheme for the nonlinear wave equation

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Chinese Science Bulletin 2003年第S2期48卷 24-29页

作者： WANG Yushun~(1,2., WANG Bin~1, YANG Hongwei~1 & WANG Yunfeng~1 1. LASG, institute of atmospheric physics, Chinese Academy of Sciences, Beijing 10002.. China 2. Permanent address: School of Mathematics and Computer Science, Nanjing Normal University, Nanjing 2.0097. China Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China Nanjing Normal Univ Sch Math & Comp Sci Nanjing 210097 Peoples R China

In this paper, we introduce the multisymplecticstructure of the nonlinear wave equation, and prove that theclassical five-point scheme for the equation is multisymplec-tic. Numerical simulations of this multisymplectic scheme onhighly oscillatory waves of the nonlinear Klein-Gordonequation and the collisions between kink and anti-kink soli-tons of the sine-Gordon equation are also provided. The mul-tisymplectic schemes do not need to discrete PDEs in thespace first as the symplectic schemes do and preserve notonly the geometric structure of the PDEs accurately, but alsotheir first integrals approximately such as the energy, themomentum and so on. Thus the multisymplectic schemeshave better numerical stability and long-time numerical be-havior than the energy-conserving scheme and the symplec-tic scheme.

关键词： symplectic schelne energy-conserving scheme multisymplectic scheme nonlinear wave equation.

Effects of 4DVAR with multifold observed data on the typhoon track forecast

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Chinese Science Bulletin 2003年第S2期48卷 93-98页

作者： WANG Yunfeng, WANG Bin, MA GANG & WANG Yushun 1. LASG, institute of atmospheric physics, Chinese Academy of Sciences. Beijing 10002., China: 2. National Satellite Meteorological Center, Beijing 100081. China Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China Natl Satellite Meteorol Ctr Beijing 100081 Peoples R China

Effects of 4-dimension variational data assimi-lation (4DVAR) with multifold observed data on the typhoontrack forecast are studied, by using the MM5V3.model, theRTTOVS-5 model and their adjoint models. The data usedfor assimilation include large-scale background fields data,bogus data, cloud-derived wind data, satellite inverse data,and high resolution infrared radiation sounder data (HIRS).There are 5 typhoon{2.es are used to perform the numericalexperiments and assimilation experiments. The numericalresults show that with 4DVAR the initial fields can be greatlyimproved and the initial typhoon structure can be clearlydescribed.

关键词： multifold observed data 4DVAR typhoon track. DOI: 10.13.0/03.d0456

Advancement and prospect of short-term numerical climate prediction

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Chinese Science Bulletin 2001年第18期46卷 1497-1502页

作者： CHOU Jifan & XU Ming1. Department of atmospheric Sciences, Lanzhou University, Lanzhou 73.000, China 2. Training Center of Chinese Meteorological Administration, Beijing 100081, China Department of atmospheric Sciences Lanzhou University Lanzhou China Training Center of Chinese Meteorological Administration Beijing China

The defects of present methods of short-term numerical climate prediction are discussed in this paper, and four challenging problems are put forward. Considering our under developed computer conditions, we should innovate in the approcuch of numerical climate prediction on the basis of our own achievements and experiences in the field of short-term numerical climate prediction. It is possibly an effective way to settle the present defects of short-term numerical climate prediction.

关键词： short-term climate numerical prediction defects innovation.

Arabian Peninsula-North Pacific Oscillation and its association with the Asian summer monsoon

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Science China Earth Sciences 2008年第7期51卷 1001-1012页

作者： SUN JianQi1, YUAN Wei2.& GAO YuZhong3.1 Nansen-Zhu International Research Centre, institute of atmospheric physics, Chinese Academy of Sciences, Beijing {2., China 2.China Meteorological Administration Training Centre, Beijing 100081, China 3.Heilongjiang Meteorological Observatory, Harbin 15003., China Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China China Meteorological Administration Training Centre Beijing China Heilongjiang Meteorological Observatory Harbin China

Using correlation and EOF analyses on sea level pressure from 57-year NCEP-NCAR reanalysis data, the Arabian Peninsula-North Pacific Oscillation (APNPO) is identified. The APNPO reflects the co-variability between the North Pacific high and South Asian summer monsoon low. This teleconnec- tion pattern is closely related to the Asian summer monsoon. On interannual timescale, it co-varies with both the East Asian summer monsoon (EASM) and South Asian summer monsoon (SASM); on decadal timescale, it co-varies with the EASM: both exhibit two abrupt climate changes in the middle 1960s and the late 1970s respectively. The possible physical process for the connections between the APNPO and Asian summer monsoon is then explored by analyzing the APNPO-related atmospheric circulations. The results show that with a strong APNPO, the Somali Jet, SASM flow, EASM flow, and South Asian high are all enhanced, and an anomalous anticyclone is produced at the upper level over northeast China via a zonal wave train. Meanwhile, the moisture transportation to the Asian monsoon regions is also strengthened in a strong APNPO year, leading to a strong moisture convergence over India and northern China. All these changes of circulations and moisture conditions finally result in an anoma- lous Asian summer monsoon and monsoon rainfall over India and northern China. In addition, the APNPO has a good persistence from spring to summer. The spring APNPO is also significantly corre- lated with Asian summer monsoon variability. The spring APNPO might therefore provide valuable in- formation for the prediction of Asian summer monsoon.

关键词： Arabian Peninsula-North Pacific Oscillation East Asian summer monsoon South Asian summer monsoon wave train abrupt climate change