大同市大气颗粒物特征     

丁中华 《华北地质矿产杂志》1996,11(2):233-236

本文根据大同市环境监测及科学研究的有关信息，简要综述了大同市区及云岗石窟地区大气颗粒物的污染水平、物理和化学性质，并提出了针对性的防治颗粒物污染的建议。  相似文献   

青岛市环境氡浓度调查   总被引：2，自引：0，他引：2  

刘庆成  彭聂 《华东地质学院学报》1996,19(1):86-89

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太原市大气SO2浓度分布及污染趋势     

曹玲娴  李伟 《华北地质矿产杂志》1996,11(2):213-215

根据太原市１９８９年至１９９２年的大气例行监测数据。分析了６个监测点的ＳＯ２点日均值的频率分布特征，并比较了各监测点的ＳＯ２污染水平及污染趋趋势。  相似文献   

Endogenous technological change and pollution abatement     

C. S. Kim  N. D. Uri  C. Sandretto  I. W. Parry 《Environmental Geology》1996,27(3):191-197

Nonpoint source pollution control is a more complicated process than traditional analysis suggests. Whether a new pollution abatement technology is developed exogenously or endogenously and the per unit reduction in the rate at which a pollutant associated with the use of a factor of production needed to produce an agricultural commodity due to this technology enters the environment are critical factors in the determination of the effects of agricultural production on the pollutant stock. These are the issues addressed here. The optimal current period research and development expenditures on an endogenously induced abatement technology associated with the use of a factor of production giving rise to environmental externalities are shown to be a function of, among other things, the cumulation of all research and development expenditures, the probability of an abatement technology being developed, the level of use of the factor of production, the unit pollution tax on the factor, the rate of time preference (discount rate), the rate at which the pollutant associated with the factor enters the environment, the rate of discharge of the pollutant stock, and so forth. Finally, the analysis demonstrates that a reduction in pollution by the adoption of an abatement technology may lead to an increase in the pollutant stock as a result of endogenous technological change associated with the pollution abatement. When the rate of pollution reduction is greater than a threshold, however, the adoption of an endogenously determined abatement technology will unequivocally lead to a reduction in the pollutant stock.The views expressed are those of the authors and do not necessarily represent the policies of the US Department of Agriculture or the views of other US Department of Agriculture staff members.  相似文献   

城市环境调查的新技术：——航空热红外遥感     

周彦儒 《城市地质》1996,8(1):25-29

本文首先谈到热污染在当前环境治理中的重要性，从应用原理上论述了航空热红外遥感被作为一种温度检测新技术的优点。文章结合北京城市热场调查，简要的介绍了该技术在地表水体污染调查，城市下垫面结构研究，城市气象研究及城市环境质量评价等方面在我国的应用研究情况。最后展望了该技术的应用前景。  相似文献   

我国地面太阳辐射量的时空变化研究   总被引：30，自引：1，他引：30  

查良松 《地理科学》1996,16(3):232-237

在分析我国到达地面太阳辐射量（１９５７￣１９９２年）时空变化分布规律基础上，阐述了火山爆发产生的气溶胶和城市发展带来的人工气溶胶对太阳辐射量变化的影响，以及大气中气溶胶增加和地面太阳总辐射量的减少在环境研究中的问题。  相似文献   

周口地区水资源现状及保护措施     

翟公敏 《地域研究与开发》1996,15(3):90-94

分析了地表水与地下水资源盈亏和水污染现状，阐明了水资源面临的危机和水环境恶化的严峻形势；预测了２０００年水资源供需趋势和水环境污染趋势，提出了水资源保护和水污染防治的具体措施和建议。  相似文献   

对太阳辐射和城市空气污染变化关系的探讨   总被引：2，自引：1，他引：2  

张文煜  冯广泓  苗玉芝  任健美 《干旱气象》1997,(1)

对兰州市太阳辐射和空气污染的年季变化规律分析表明：太阳直接辐射、总辐射及大气透明系数呈逐年下降趋势，散射辐射和晴天大气混浊因子呈逐年增加趋势，且从７０年代后期开始这种趋势更加明显；冬季大气污染最严重，夏季较其他季节轻，春季污染高于秋季。总悬浮微粒的年、季变化与太阳辐射和混浊因子的变化规律基本一致  相似文献   

Boundary-Layer Ozone in Croatia   总被引：7，自引：0，他引：7  

T. Cvitas  N. Kezele  L. Klasinc 《Journal of Atmospheric Chemistry》1997,28(1-3):125-134

An analysis of ozone distribution in the atmosphericboundary layer based on monitoring data from two TORstations in Croatia is given. The levels were found tobe generally higher than expected for the continentalbackground. At the Puntijarka station, which can betaken as representative for the region, high valuesare mainly associated with transport from the west.The RBI station represents an urban site withoccasional photosmog situations. Short termmeasurements along the Adriatic coast have shown thatthere is a negative north to south gradient in ozoneconcentration as predicted by model calculations, butalso that some local photochemical production takesplace even at the remote Adriatic island far frompollution sources.  相似文献   

Meteorology and haze structure during AGASP-II,Part 2: Canadian Arctic flights, 13–16 April 1986     

H. A. Bridgman  R. C. Schnell  G. A. Herbert  B. A. Bodhaine  S. J. Oltmans 《Journal of Atmospheric Chemistry》1989,9(1-3):49-70

In April 1986, a well-instrumented NOAA WP-3D research aircraft conducted three flights in the Canadian Arctic tied to the Canadian Atmospheric Environment Service baseline station in Alert, Northwest Territories. Two of the flights were coordinated with the National Aeronautical Establishment of Canada Twin Otter and the University of Washington C-131 research aircraft. The haze observed in the Canadian Arctic was well-aged and mixed throughout the troposphere in concentrations well below those observed during the previous weeks in the Alaskan Arctic. Over the ice, beneath the surface temperature inversion, ozone was generally depleted to near zero. Over the coast at Alert, there is evidence that topography and downslope winds reduce the strength of the inversion, thus allowing lower tropospheric gases and aerosols to mix down to the surface. At the top of the troposphere, an aerosol-depleted region was observed. In the lower stratosphere, aerosol concentrations were elevated above those observed in the troposphere.  相似文献