云南巍山五里巷一茶雷村金矿地质及找矿方向

金矿赋存于挤压——滑脱构造破碎带中。成矿受构造、地层（岩性）、地球化学条件和围岩蚀变等条件控制。该区具有较大的找金潜力。     

模糊综合评判在临沂城区岩溶塌陷危险性评价中的应用

岩溶塌陷是山东省临沂市区最重要的地质灾害类型,该文首次采用基于层次分析的模糊综合评判法对岩溶塌陷进行了危险性现状评价,综合得出了危险性评价分级图,为当地岩溶塌陷防治工作提供了基础数据,也为同类地质灾害预防提供了借鉴模式。     

Seasonal variations of the near surfacelayer parameters over the Antarctic ice sheet in Princess Elizabeth Land,East Antarctica

Analysis of sensible heat flux(Qh),latent heat flux(Qe),Richardson number(Ri),bulk transport coefficient(Cd) and katabatic winds are presented by using the meteorological data in the near surface layer from an automatic weather station(AWS) in Princess Elizabeth Land,East Antarctica ice sheet and the data of corresponding period at Zhongshan station in 2002.It shows that annual mean air temperature at LGB69 is-25.6°C,which is 16.4°C lower than that at Zhongshan,where the elevation is lower and located on the coast.The temperature lapse rate is about 1.0°C/110 m for the initial from coast to inland.The turbulence heat flux at LGB69 displays obvious seasonal variations with the average sensible heat flux-17.9 W/m2 and latent heat flux-0.9 W/m2.The intensity(Qh Qe) of coolling source is-18.8 W/m2 meaning the snow surface layer obtains heat from atmosphere.The near surface atmosphere is near-neutral stratified with bulk transport coefficients(Cd) around 2.8×10-3,and it is near constant when the wind speed higher than 8 m/s.The speed and the frequency of easterly Katabatic winds at LGB69 were higher than that at Zhongshan Station.     

ANTARCTIC SEA ICE AND THE POLAR VORTEX INDEX:TEMPORAL AND SPATIAL CHARACTERISTICS AND THEIR RELATIONSHIP

The cluster analysis method has been used to divide the Antarctic sea ice variation field into 5 sectors.Then,foreach of these sectors,the corresponding indexes of vortex area and vortex intensity on the 500 hPa level have been calcu-lated.These data were used to analyse the temporal and spatial characteristics of both Antarctic sea ice and the vortexindex variations and their relationship.Our results show that substantial differences are presented in the climatic patternand interannual variations of the sea ice data and vortex index in different sectors.The maximum sea ice extent varia-tions appear in sector 1 and sector 4.Oscillation periods of 2—2.5 and 5—7 years exist in the variations of sea ice extentand vortex index in most sectors.A positive trend is only found in sector 1 sea ice extent while the other sectors shownegative trends.The average extent of the Antarctic sea ice as a whole has retreated at a rate of 1.6 latitudes per 100years.The vortex areas for all sectors have decreased.Nevertheless,the vortex intensities in 3 sectors have increased.Therelationship between sea ice and vortex characters in each sector is obvious,but a little complex.Sectors 1 and 5,whichare located in the Southeast Pacific and South Atlantic,are the most sensitive areas in terms of sea ice/atmosphereinteraction.     

我国东部第四纪海侵地层的初步研究

沿海平原和陆架浅海,都是第四纪洋面升降引起海岸线迁移的范围。近年来的大量钻孔资料表明:我国东部沿海凡有平原发育的地方,都曾经遭受第四纪海侵。在大平原区,海相沉积分布范围可以从现代海岸向内陆延伸近百公里,甚至沿河谷上溯数百公里处还有间冰期时海水内泛的踪迹。因此,海侵地层的研究应当是沿海平原第四纪研究中的     

关于我国东部含油盆地早第三纪地层的沉积环境

我国东部的早第三纪地层,不仅因丰富的石油等矿产资源成为地质勘探的主要对象之一,而且以其独特的化石群和岩相特征吸引着广大地质工作者的注意。我国东部下第三系中的化石群,除台湾省外均以非海相介形虫、轮藻、孢粉等为主,长期以来一直被认为只是纯陆相地层。然而勘探工作的深入却日益揭示出关于沉积环境的新线索。问题     

浅水波模式半拉格朗日方法的并行研究

该文研究的问题是分布式并行计算机消息传递方式下半拉格朗日并行算法, 重点研究二维浅水波并行模式中有关子区域过渡带(HALO)的问题和有关求解赫姆霍兹方程的并行算法。进行了一系列的对比试验, 研究在不同分辨率下模式的并行效率的问题。结果表明:采用分区域并行计算的方法, 可得到较好的并行效率。模式中使用半拉格朗日方法处理平流项是有利的, 在分辨率高时, 可有效地提高计算速度。     

Spatial-temporal characters of Antarctic sea ice variation

Using sea ice concentration dataset covering the period of 1968-2002 obtained from the Hadley Center of UK, this paper investigates characters of Antarctic sea ice variations .The finding demonstrates that the change of mean sea-ice extent is almost consistent with that of sea-ice area, so sea-ice extent can be chosen to go on this research. The maximum and the minimum of Antarctic sea ice appear in September and February respectively. The maximum and the maximal variation of sea ice appear in Weddell Sea and Ross Sea, while the minimum and the minimal variation of sea-ice appear in Antarctic Peninsula. In recent 35 years, as a whole, Antarctic sea ice decreased distinctly. Moreover, there are 5 subdivision characteristic regions considering their different variations. Hereinto, the sea-ice extent of Weddell Sea and Ross Sea regions extends and area increases, while the sea-ice extent of the other three regions contracts and area decreases. They are all of obvious 2-4 years and 5-7 years significant oscillation periods. It is of significance for further understanding the sea-ice-air interaction in Antarctica region and discussing the relationship between sea-ice variation and atmospheric circulation.     

GIS-PModflow联合系统在松嫩平原西部潜水环境预警中的应用

针对松嫩平原西部地下水潜水位变化对环境产生影响的现状,运用GIS-PModflow联合系统确定了地下水环境预警警戒线,采用以不至于发生土壤盐碱化的潜水临界水位作为上警戒线值,以潜水开采极限深度作为下警戒线值。在对系统模型概化的基础上,进行了潜水位的数值模拟和预报。利用GIS空间分析方法对图像数据进行栅格叠加和属性判断,通过对预报水位与警戒水位对比,进行水环境预警。结果表明,研究区2015年的警情较1999年增加,且以灌溉后潜水位上升引起的土壤次生盐渍化的警情为主。     

碳循环及对气候变化和人类生存环境的影响

碳循环及全球变暖已成为影响气候变化、人类生存环境和经济共同发展和安全的重大问题,引起了全球科学、政治、外交政策等部门的重视。本文着重探讨碳循环的由来、生态系统与碳循环的科学相关、在碳循环方面,中国需要解决的问题和科学技术方法以及碳循环系统的科学研究方法和改进等问题。