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首页> 外文期刊>Aerosol and Air Quality Research >How the Atmosphere over Eastern Himalaya, India is Polluted with Carbonyl Compounds? Temporal Variability and Identification of Sources
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How the Atmosphere over Eastern Himalaya, India is Polluted with Carbonyl Compounds? Temporal Variability and Identification of Sources

机译：羰基化合物如何污染印度喜马拉雅东部的大气？时间变异性和来源识别

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A study was conducted on atmospheric carbonyl compounds for the first time over a Himalayan atmosphere in India. Samples were collected from a high altitude hill station, Darjeeling (27.01°N, 88.15°E, 2200 masl) during June 2012 to May 2013. Temporal variation, meteorological influence, source apportionment and ozone formation potential etc were studied for acetaldehyde, formaldehyde, acetone, butanaldehyde, propanaldehyde, benzaldehyde, crotonaldehyde, valeraldehyde, isovaleraldehyde, hexanaldehyde, p-tolualdehyde and o-tolualdehyde. High concentration of Acetone (81.6 ± 63.5 µg m–3) was observed which could be due to the higher photochemical production from its precursor volatile organic compounds emitted from tea plants and tea processing units. The concentration of acetaldehyde (20.7 ± 47.6 µg m–3) and formaldehyde (11.6 ± 16.3 µg m–3) were found to be comparable with metro cities of India and world. The average annual concentration of total carbonyl compounds was 174.2 ± 184.6 µg m–3 with maximum during postmonsoon (456.9 ± 199.5 µg m–3) and minimum during winter season (72.2 ± 42.9 µg m–3). Meteorological parameters like temperature and surface reaching solar radiative flux played the major roles for the seasonal variation of the carbonyl concentration over the hill station. The average ratio of formaldehyde to acetaldehyde over Darjeeling was found to be 1.64 ± 1.43 well representing a typical urban atmosphere at this part of Himalaya. Positive matrix factorization model showed that the biogenic emissions from tea plants and vehicular emissions were the major sources of carbonyl compounds over the hill station.
机译：首次在印度的喜马拉雅大气上对大气中的羰基化合物进行了研究。在2012年6月至2013年5月期间，从大吉岭（27.01°N，88.15°E，2200 masl）的一个高山高原站采集了样本。研究了乙醛，甲醛，甲烷，丙酮，丁醛，丙醛，苯甲醛，巴豆醛，戊醛，异戊醛，己醛，对甲苯甲醛和邻甲苯甲醛。观察到高浓度的丙酮（81.6±63.5 µg m–3），这可能是由于从茶厂和茶厂排放的其前体挥发性有机化合物的光化学产量更高。发现乙醛（20.7±47.6 µg m–3）和甲醛（11.6±16.3 µg m–3）的浓度与印度和世界大都市相当。羰基化合物的年平均总浓度为174.2±184.6 µg m–3，季风后最高（456.9±199.5 µg m–3），冬季最低（72.2±42.9 µg m–3）。温度和到达太阳辐射通量的地面等气象参数对山地站羰基浓度的季节性变化起主要作用。在大吉岭，甲醛与乙醛的平均比例为1.64±1.43，代表了喜马拉雅山这一地区典型的城市大气。正矩阵分解模型表明，茶山的生物排放和车辆排放是山地站羰基化合物的主要来源。

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