济南市泉城路商业街外部空间形态及环境塑造评析

本文在对济南市泉城路实地调研的基础上,运用城市设计理念,主要评析了泉城路商业街外部空间形态及环境塑造的成败之处,相应地提出改进建议。     

济南都市圈城镇体系分形研究

以济南都市圈为例,对其城镇体系等级规模和空间结构的分形特征进行了实证研究,计算出了济南都市圈等级规模分形维数和空间结构分形维数,结论如下：济南都市圈城镇数量和规模分布不均匀,区域集聚力不强,一体化程度不高．由此提出济南都市圈城镇体系建设的优化途径．     

Tracing the sources of particles in the East Rongbuk ice core from Mt. Qomolangma

Sr-Nd-Pb isotopic tracer was applied, for the first time, to identifying the sources of the particles in the East Rongbuk ice core from Mt. Qomalangma （Everest）. The results show that the particles in the dirty layers originate mainly from local sources, while the particles in the non-dirty layers are consistent with the features of dust from the arid regions in northwestern India. The HYSPLIT model shows that the air trajectory goes first through northwestern India before reaching the drilling site of ice core when dust storms occur in northwestern India, confirming northwestern India as a possible source of dust in the East Rongbuk ice core.     

Records of volcanic events since AD 1800 in the East Rongbuk ice core from Mt. Qomolangma

Continuous Bi profile of the East Rongbuk (ER) ice core near Mt. Qomolangma reveals nine major volcanic events since AD 1800. Compared with Volcanic Explosivity Index (VEI), it shows that the concentrations of Bi in the ER ice core can reflect the major volcanic events within the key areas. This provides a good horizon layer for ice core dating, as well as a basis for reconstructing a long sequence of volcanic records from the Qinghai-Xizang (Tibet) Plateau ice cores. Supported jointly by National Basic Research Program of China (Grant No. 2007CB411501), National Natural Science Foundation of China (Grant No. 90411003), Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX3-SW-344) and Hundred Talents Project of the Chinese Academy of Sciences     

Simulating a typhoon storm surge in the East Sea of China using a coupled model

A coupled numerical model with a 2’?2’ resolution grid has been developed and used to simulate five typical typhoon storm surges (5612, 7413, 7910, 8114, 9711) in the East Sea of China. Three main driving forces have been considered in this coupled model: wave radiation stress, combined wave-current bottom shear stress and wave-state dependent surface wind stress. This model has then been compared with in situ measurements of the storm set-up. The effect of different driving force components on the total storm surge has also been investigated. This study has found that the coupled model with high resolution is capable of simulating the five typical typhoons better than the uncoupled models, and that the wave-dependent surface wind stress plays an important role in typhoon storm surge-wave coupling in this area and can increase the storm set-up by 1m. The study of the five typhoon cases has shown that the general coupling effects could increase storm set-up by 20% to 32%. Thus, it is suggested that to predict typhoon storm surges in the East Sea of China, a storm surge-wave coupled model be adopted.     

Characterization of Fe-S minerals influenced by buried ancient woods in the intertidal zone, East China Sea

An ancient wood layer dated at about 5600 cal. a BP by AMS14C dating was discovered in the intertidal zone, East China Sea. Samples affected by ancient woods, including fresh coast bedrock, weathering bedrock, seepage water from coast, seepage water from ancient wood layer, intertidal seawater, fresh water, beach mud, ancient wood barks and ancient peat, were collected for geochemical analysis. The beach mud and the bacteriogenic iron oxides （BIOS） in coastal seepage water were analyzed by min- eralogical and high-resolution transmission electron microscopy （HRTEM）-selected area electron dif- fraction （SAED） analysis. Inorganic sulfur compositions and b＇34S of the ancient peat and the beach mud were determined. The results showed that Fe, Mn, S （SO~-） were enriched in the intertidal area at different levels, very likely caused by fermentation of ancient woods. The presence of abundant iron- oxidizing bacteria （FeOB） and sulfate-reducing bacteria （SRB） in this intertidal zone was confirmed by HRTEM-SAED observation, and these bacteria were involved in Fe-S cycle to induce extracellular biomineralization. The negative ~4Sv.cDT （--2.9%o） likely indicated the biogenic origin of iron-sulfide minerals in the beach mud at high sulfate reduction rate （SRR）. These findings are helpful for under- standing the biogeochemical Fe-S cycle and biomineralization process at high organic matter deposition rate and high SRR in the intertidal zone, estuary, or near shoreline.     

Regional integrated environmental model system and its simulation of East Asia summer monsoon

A continuous 22-year simulation in Asia for the period of 1 January 1979 to 31 December 2000 was conducted using the Regional Integrated Environmental Model System （RIEMS 2.0） with NCEP Reanalysis II data as the driving fields. The model processes include surface physics state package （BATS le）, a Grell cumulus parameterization, and a modified radiation package （CCM3） with the focus on the ability of the model to simulate the summer monsoon over East Asia. The analysis results show that （1） RIEMS reproduces well the spatial pattern and the seasonal cycle of surface temperature. When regionally averaged, the summer mean temperature biases are within 1-2℃（2） For precipitation, the model reproduces well the spatial pattern, and temporal evolution of the East Asia summer monsoon rain belt, with steady phases separated by more rapid transitions, is reproduced. The rain belt simulated by RIEMS 2.0 is closer to observation than by RIEMS 1.0. （3） RIEMS 2.0 can reasonably reproduce the large-scale circulation.     

The responses of East Asian Summer monsoon to the North Atlantic Meridional Overturning Circulation in an enhanced freshwater input simulation

We investigated the response of the East Asian Summer Monsoon （EASM） to a weakened Atlantic Meridional Overturning Circulation （AMOC） and its mechanism in an enhanced freshwater input experiment （FW） by using a fully-coupled climate model. The response was a weakened EASM and the mechanisms can be explained as follows. The simulated weakened AMOC resulted in a drop in sea surface temperature （SST） in the North Atlantic （NA） and, correspondingly, an anomalous high sea level pressure （SLP） over the North American regions, which in turn increased the northeast surface winds across the equator in the eastern tropical Pacific （ETP）. The anomalous northeast winds then induced further upwelling in the ETP and stronger air/sea heat exchange, therefore leading to an anomalous cooling of the eastern tropical sea surface. As a result, the climatologic Hadley Circulation （HC） was weakened due to an anomalous stronger sinking of air in the ETP north of the equator, whereas the Walker Circulation （WC） in the western tropical Pacific （WTP） north of the equator was strengthened with an eastward-shifted upwelling branch. This feature was in agreement with the anomalous convergent winds in the WTP, and led to a weakened EASM and less East Asian summer precipitation （EASP）. Furthermore, comparison with previous freshwater experiments indicates that the strength of EASP could be influenced by the magnitude of the added freshwater.     

西湖凹陷三潭深凹南部异常高压分布层位及其形成机理

东海陆架盆地西湖凹陷三潭深凹南部各构造含有丰富的油气,目前在该地区的秋月构造、孤山构造和湖心亭构造都已经发现了油气。研究发现该地区深部地层中普遍存异常高压,但是在研究区的不同部位异常压力产生的原因及分布的层位有所不同。众所周知异常高压对研究区内油气的生、储、盖、圈、运、保等成藏要素由重要影响;但是到目前为止前人对该区域异常高压形成机理方面的研究还十分有限,因此分析研究区异常压力的分布层位以及它的形成机理对石油和天然气的勘探与开发有重要意义。本文用主要用测井、岩心孔隙度鉴定、薄片鉴定并结合粘土矿物成岩转化作用相关的知识对这一点进行论述,希望能对本地区及其他地质条件类似的地区油气的勘探与开发起到一定的指导作用。     

东方主义探究

通过对美国学者爱德华.塞义德的《东方学》的分析,剖析西方人的＂东方主义＂情结。指出东方主义在本体论和认知论的关系上是矛盾的,＂东方主义＂是西方人为了自己的利益而虚构的一整套关于东方的形象。在当今全球化的语境下,必须消解东西方二元对立的思想,才能建构新的和谐的东西方关系,为世界的和平作出贡献。