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本文在详细地研究了张家口中生代火山盆地火山喷发物的基础上,利用岩石学及大气环境化学的基本原理,提出了一套系统估算火山喷出气体及气溶胶总量的程序与方法,并对张家口中生代火山喷出气体的种类、总量及气溶胶总量进行了估算;分析了火山硫化物气体转化为火山硫酸盐气溶胶的光化学过程及可能途径。在分别研究了本区火山喷发导致的“阳伞效应”与“温室效应”的基础上,探讨了该区火山喷发对地表温度的综合影响。初步结果表明:张家口中生代火山盆地火山喷发向当时大气圈中输送了约9.96×1010kg的硫酸盐气溶胶,它们能导致当时北半球范围内太阳总幅射率降低0.81%~3.60%,最终造成地表温度下降约0.81℃~3.6℃。
Based on the detailed study of the volcanic eruptions of the Mesozoic volcanic eruption in Zhangjiakou, this paper presents a set of procedures and methods for estimating volcanic gas and aerosol volcanic emissions by using the basic principles of petrology and atmospheric chemistry. The types and total amount of gas emitted from Zhangjiakou Mesozoic volcano and the total amount of aerosol were estimated. The photochemical process of volcanic sulfide gas into volcanic sulfate aerosol and its possible ways were analyzed. On the basis of studying “parasol effect” and “greenhouse effect” caused by volcanic eruption in this area separately, the comprehensive effects of volcanic eruption on the surface temperature in this area are discussed. The preliminary results show that volcanic eruptions of the Mesozoic volcanic basin in Zhangjiakou transported about 9.96 × 1010 kg of sulfate aerosols into the atmosphere at that time, which led to a decrease of 0.81% -3.60% of total solar radiation in the Northern Hemisphere at that time %, Eventually resulting in a surface temperature drop of about 0.81 ℃ ~ 3.6 ℃.