The　East　Asian　Monsoon　Simulation　with　IAP　AGCMs-A　Composite　Study   总被引：5，自引：2，他引：5  

Wang Huijun  Bi Xunqiang 《大气科学进展》1996,13(2):260-264

Ｔｈｅ　Ｅａｓｔ　Ａｓｉａｎ　Ｍｏｎｓｏｏｎ　Ｓｉｍｕｌａｔｉｏｎ　ｗｉｔｈ　ＩＡＰ　ＡＧＣＭｓ－Ａ　Ｃｏｍｐｏｓｉｔｅ　ＳｔｕｄｙＷａｎｇＨｕｉｊｕｎａｎｄＢｉＸｕｎｑｉａｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＡｔｍｏｓｐｈｅｒｉｃＰｈｙｓｉｃｓ（ＩＡＰ），...  相似文献   

古丝绸之路与新亚欧大陆桥：河西走廊经济发展思考     

姚建华  郎一环 《干旱区地理》1996,19(1):10-13

河西走廊在古丝绸之路中占有重要的地位和作用。新亚欧大陆桥开通之后，河西能否依桥再现辉煌，必须从古丝路与新陆桥的特点出发，作对比研究。本文分析了沿海和沿桥的历史特点与现状，提出了河西经济发展应采取的积极主动对策，即主动上桥、逼桥赐惠；人车分离与千方引客；西进东出、走出封闭。  相似文献   

    

Chineke Theo Chidiezie  Bi Xunqiang  Wang Huijun  Xue Fong 《大气科学进展》1997,14(3):409-416

A brief introduction is given of the Grid–point 9–layer Atmospheric General Circulation Model (AGCM) developed at the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences. The results of the 1980–1989 Atmospheric Model Inter-Comparison Program (AMIP) run were compared with observed European Centre for Medium-Range weather Forecasts (ECMWF) temperature data for the same period. The statistical analysis, and Grids Analysis and Display System (GrADS) results have shown that the model holds a great promise in predicting the African climate with considerable accuracy, within and across the seasons. This is a great hope for climate research in Africa which is data-sparse region. On leave from School of Physical Sciences, Imo State University, PMB 2000 Owerri, Nigeria.  相似文献   

Application of pyrolysis gas chromatography technique to evaluation of coal-generated hydrocarbon     

Yongge Sun  Guoying Sheng  Jiamo Fu 《中国科学D辑(英文版)》1997,40(1):99-103

Based on kerogen-generated hydrocarbon model, a new method to calculate hydrocarbon yields for coals and coaly samples was put forward by means of pyrolysis technique. At the same time, the empirical criteria suggested by Powell were revised. The threshold value was preliminarily defined as HC yields >30 mg HC per gram TOC for effective gas source rocks and >60 mg HC per gram TOC for effective oil source rocks. Additionally, it was also confirmed that the relative compositions of the three ranges of C1-C5 total hydrocarbons, C6-C14n-alkanes plusn-alkenes and C15⁺ n-alkanes plusn-alkenes from pyrolysates can be effectively used to distinguish the coal-generated hydrocarbon types.  相似文献   

湖北松滋县洈水风景区的岩溶洞穴群     

沈继方  汪玉松  毕运龙  张昌云 《中国岩溶》1995,(Z1):90-95

松滋县洈水风景区的洞穴群是一具有旅游、科学研究、考古和探险等综合价值的岩溶资源。本文初步，也是首次介绍了该洞穴群的地质背景、环境条件和发育特征，重点展示了新神洞内奇特壮观的瀑布、化学沉积物、惊险无比的洞道和洞水。  相似文献   

Fluid inclusion study of Xihuashan tungsten deposit in the southern Jiangxi province,China     

G. Giuliani  Y. D. Li  T. F. Sheng 《Mineralium Deposita》1988,23(1):24-33

The Xihuashan tungsten deposit is closely related to a small highly evolved granitic intrusion. The fluid phases associated with the wolframite-bearing quartz veins have been investigated using microthermometry and the Raman microprobe; they are highly variable in density and composition. The earlier fluids are low-density and low-salinity CO₂-bearing aqueous solutions circulating at temperatures up to 420 °C, and low-salinity (2–3 equiv. wt% NaCl) aqueous solutions without traces of CO₂ circulating at high temperatures 280°–400 °C) involved in a specific hydrothermal fracturing event; limited unmixing occurs at 380 °C and 200–100 bar in response to a sudden pressure drop. The second types of fluids related to deposition of idiomorphic drusy quartz are typical CO₂-bearing aqueous solutions with low salinity (2.5 equiv. wt% NaCl) homogenizing at low to moderate temperatures (180°–340 °C). The late fluids characterize the sulfide deposition stage; they are aqueous fluids with variable salinities homogenizing in the liquid phase between 100° and 275 °C. The Xihuashan hydrothermal evolution resulted from a discontinuous sequence of specific events occurring between 420° and 150 °C and during a continuous hydrothermal evolution of the system during cooling. The role played by the CO₂-rich fluids in the transport and deposition of tungsten in the hydrothermal environment is discussed.  相似文献   

孕震过程中地震活动时空不均匀性的研究   总被引：2，自引：0，他引：2  

虞雪君  姚立珣  盛国英  侯晓红 《地震工程学报》1989,11(1):1-10

在大地震的长期孕育过程中,孕震区的地震活动一般都要经历一个加速增强过程和一个异常平静过程,显示出地震活动时空不均匀性的加剧。基于这一事实,本文定量地定义了描述确定区域地震活动空间不均匀性的两项指标,即地震频次不均匀度F_d和地震能量不均匀度E_d。在阐明其理论依据的基础上,以我国近十几年内发生的8个6—7级地震为例,总结了F_d的异常时间T_f和E_d的异常时间T_e与未来地震强度的相关性。由其相关性出发,对1987年1月8日甘肃迭部发生的5.9级地震作了检验,检验效果尚好。一系列震例的总结和检验说明:运用指标E_d、F_d定量地探讨和预报某一确定区域地震发生的可能性是可行的。  相似文献   

关于山西岩溶泉水资源保护问题的探讨     

武胜忠  苑莲菊 《吉林大学学报(地球科学版)》1986,(4)

本文在分析山西高原岩溶泉特征基础上,论述了岩溶泉的保护问题:合理扩泉岩溶水开采的统一规划;溶泉水利用的统一管理。根据岩溶泉形成和“三水”转化的观点提出了人为改变天然水文地质条件,增加补给量,减少排泄量,是增大泉水流量的根本途径。具体措施:植树造林;修建水利工程;引水回灌。  相似文献   

Evidence for the Lower Continental Crustal Origin of the Xihuashan Granite     

L.Le Bel  G.Giuliani 《《地质学报》英文版》1986,60(3):47-64

The Xihuashan granite is typically representative of the tungsten-bearing granites widespread in theNanling area of South China. It was considered in the past to have been formed by partial melting of the upper continental crust, with its source rocks most probably of the Sinian or Cambrian. However, detailed REE analyses, studies of the Rb-Sr isotopic system and melting experiments of metasedimentary rocks all argue against this idea. Moreover, stable isotopic data also indicate a deep source origin for S, C, H and O. The authors thus propose a genetic concept of the lower continental crustal source of the Xihuashan granite, and point out further that tungsten deposits related to this kind of granite are linked in some way to deep-seated structure and concentrated along NNE-NE- and ENE-striking major deep fault belts above the transitional zone between mantle uplift and mantle depression.  相似文献   

Stability Analysis and Reinforcement Design of A High Steep Rock-soil Slope     

Zhang Guang  Li Xiaochun  Sheng Jianhao  Xu Yibao 《岩土力学》1989,10(3):77-82

Engineering geological survey, field testing of physico-mechanical parameters, and numerical analysis of stability are made for a high steep rock-soil slope. Based on this, a reinforcement design scheme is proposed to keep slope stable in give period. The reinforcement method and safety coefficients presented in this paper are of reference value for similar slopes.  相似文献