Volatile Organic Compounds in the Global Atmosphere
Volatile Organic Compounds in the Global Atmosphere
复制标题
全球大气中的挥发性有机化合物
DOI：
10.1029/2009eo520001
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
S. Thiel
中科院分区：
文献类型：
--
作者：
D. Helmig;J. Bottenheim;I. Galbally;A. Lewis;M. Milton;S. Penkett;C. Plass;S. Reimann;P. Tans;S. Thiel
挥发性有机化合物（VOC）包括饱和烃、不饱和烃和其它取代烃。VOCs通过影响臭氧和羟基自由基（OH）浓度以及氮氧化物（NOx）的转化率在大气化学中发挥重要作用。在过去的几个世纪里，挥发性有机化合物和氮氧化物水平的升高导致对流层低层的臭氧几乎翻了一番，使对流层臭氧成为继二氧化碳（CO2）和甲烷之后的第三大人为温室气体。由于臭氧的强氧化特性，对流层臭氧的增加是地球上生命系统的一个问题。臭氧对植被造成压力和破坏，导致陆地二氧化碳固存减少。挥发性有机化合物也是大气二次有机气溶胶（SOA）的来源，它影响太阳辐射收支和云滴成核。通过这些复杂的相互作用，VOCs在空气质量和气候中发挥着重要作用。
Volatile organic compounds (VOCs) include saturated, unsaturated, and other substituted hydrocarbons. VOCs play an important role in the chemistry of the atmosphere by influencing ozone and hydroxyl radical (OH) concentrations, and the conversion rates of nitrogen oxides (NOx). Elevated levels of VOCs and NOx have led to an approximate doubling of ozone in the lower troposphere over the past couple of centuries, making tropospheric ozone the third most important anthropogenic greenhouse gas after carbon dioxide (CO2) and methane. Because of ozone's strong oxidizing properties, increases in tropospheric ozone are a concern for living systems on Earth. Ozone stresses and damages vegetation, resulting in a reduction of terrestrial CO2 sequestration. VOCs also serve as a source of atmospheric secondary organic aerosol (SOA), which influences the solar radiation budget and cloud droplet nucleation. Through these complex interactions, VOCs play an important role in air quality and climate.