气象要素及前体物对南京北郊臭氧浓度的影响

论文总字数：17211字

目 录

摘要 2

Abstract 3

第一章 绪 论 4

1.1研究背景和意义 4

1.2国内外研究进展 4

1.3研究目标和内容 5

第二章 数据与方法 5

2.1站点介绍 5

2.2仪器介绍 6

2.3 SP算法介绍 7

第三章 分析和讨论 7

3.1臭氧与前体物时间序列上的对应 7

3.2臭氧与气象要素关系 9

3.3光化学反应程度分析 11

3.4 VOC_S的臭氧生成潜势 13

第四章 总结与展望 15

4.1总结 15

4.2展望与不足 15

参考文献 15

致谢 17

南京大气中臭氧生成过程分析

吴延康

，China

Abstract：As the pollutants in the urban atmosphere, ozone directly affects the normal survival of humans and animals and plants, and then affects the balance between the earth and the atmospheric balance system. Based on the ground observation data of Nanjing area, this paper studied the concentration of ozone and its related precursors NO_X, CO, VOC_S and ozone concentration, and the influence of meteorological factors on ozone concentration to study the concentration of precursors and O₃. The law of change, the use of SP (photochemical smog production method) algorithm to study the ozone formation mechanism in Nanjing. Using the Ozone Formation Potential (OFP) of various volatile organics, a case study was conducted on May 21 to May 27, 2016. The following conclusions are drawn: 1) The ozone concentration shows a unimodal distribution with time, and reaches a maximum at around 15:00 in a day. At high temperatures, breeze weather can easily reach higher values. 2) The diurnal variation curve of the degree of photochemical reaction in the atmosphere of Nanjing shows a first increase and then a decrease, and reaches its maximum around 14:00 in the afternoon. The photochemical reaction parameter E(t) also indicates that the O₃ generation in Nanjing is mainly controlled by the change of VOC_S concentration.3) Among the VOC_S components, aromatic hydrocarbons contributed the most to the OFP, reaching 50.60%. This is followed by olefinsgt;alkanesgt;alkynes. Controlling the emission of aromatic hydrocarbons can effectively achieve the effect of controlling ozone concentration.

Key words: Ozone; Ozone precursor; Photochemical smog production method;Ozone Formation Potential (OFP).

第一章 绪 论

1.1研究背景和意义

人类活动和自然系统不断地向大气中排放各种各样的能长期停留其中的物质。一旦其中的某种物质浓度超过了维持生态系统正常运行的水平，并且对一些环境（水体性质，气候等）要素产生影响时，就形成了大气污染。通常认为，大气污染只发生在经济较发达且工业水平较高的地方，因为那里的污染物浓度一般要比欠发达地区高出许多倍，似乎大气污染问题是局地或区域性的。但从总体上来讲，大气污染是全球性的，因为污染物最终将构成循环，散布到整个大气中。

随着全球化的进行，全球大多数地方经济的飞速发展，人类活动对自然的影响在迅速扩大，并由此产生了一系列严重问题，使得地球环境日益恶化，严重影响了经济的可持续发展以及人类和动植物的正常生存。

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