Chemical composition and hygroscopic properties of secondary organic aerosol : Their impact on the atmospheric environment

二次有机气溶胶的化学成分和吸湿特性：对大气环境的影响

• 批准号: 14204055
• 负责人: KAWAMURA Kimitaka
• 金额: $ 36.28万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14204055/
• 关键词: Secondary organic aerosols; Hygroscopic property of aerosols; Particle generator; Aerosol size distribution; Aitken particle; Hygroscopicity Tandem Differential Mobility Analyzer; Atmospheric observation in Tokyo; Stable carbon isotopic composition

Tandem differential mobility analyzer (TDMA) system was assembled and modified to hygroscopic TDMA, by which hygroscopic properties of atmospheric particles were measured. This system was first used to determine the growth factors of cellulose pyrolysis products such as levoglucosan and D-glucose, and lignin-pyrolysis products such as 4-hydroxybenzoic acid, syringic acid. We found that levoglucosan and glucose are very hygroscopic compounds and thus can act as cloud condensation nuclei in the atmosphere.TDMA and H-TDMA system has been used for size distributions and hygroscopic properties of aerosols during the IMPACT campaign conducted in urban Tokyo together with many instruments including High-volume air samples, PM1 impactor, annular denuder sampling system, etc. The samples were analyzed for low molecular weight dicarboxylic acids, ketocarboxylic acids and dicarborryls, as well as semi-volatile aldehydes, water-soluble organic carbon (WSOC), elemental carbon (EC) and organic carbo … More n (OC).1.Concentrations of oxalic acid and other water-soluble dicarboxylic acids as well as related compounds increased from early morning to noon and then decreased toward to the evening. The amplitudes of the peaks for individual species were 3-15 times relative lo nighttime concentrations, suggesting photochemical production of secondary organic aerosols.2.OC and WSOC also showed diurnal variation with maxima around noontime. The relative abundances of diacids over OC and WSOC also showed maxima in daytime. This suggests that polar organic compounds are selectively produced in urban atmosphere during photochemical episode.3.Hygroscopic properties of aerosols were measured in Tokyo at particle size mode of 100 nm and 200 nm. Hygroscopic growth factors for fine particles were found to increase from the morning to noontime and further increase toward the evening. This finding is consistent with the increased concentrations of water-soluble dicarboxylic acids and WSOC in daytime. We also found that this hygroscopic growth is more significant for 200 nm size particles than that for 100 nm particles. These physical properties of particles may be associated with the chemical composition of the aerosols. Photochemical production of water-soluble organic aerosols seemed to be followed by the photochemical evolution of organic aerosols, namely, photochemically aged aerosols may be more enriched in larger particles. Less

将串联微分迁移率分析仪（TDMA）系统组装改造为吸湿TDMA系统，用于测量大气颗粒物的吸湿特性。该体系首次用于测定纤维素热解产物左旋葡萄糖、D-葡萄糖和木质素热解产物4-羟基苯甲酸、胡萝卜酸的生长因子。我们发现左旋葡萄糖和葡萄糖是非常吸湿的化合物，因此可以作为大气中的云凝结核。在东京市区进行的IMPACT活动中，使用TDMA和H-TDMA系统以及许多仪器，包括大容量空气样品，PM 1撞击器，环形扩散器采样系统，分析了低分子量二元羧酸、酮基羧酸和二碳烯化合物，以及半挥发性醛类、水溶性有机碳（WSOC）、元素碳（EC）和有机碳（GC）。 ...更多信息 n（OC）. 1.草酸等水溶性二羧酸及其相关化合物的浓度从清晨到中午呈上升趋势，到傍晚呈下降趋势。各物种的峰值幅度是夜间浓度的3-15倍，表明二次有机气溶胶的光化学产生。2.OC和WSOC也表现出日变化，中午前后达到最大值。有机碳和水有机碳中二酸的相对丰度在白天也有最大值。这表明，在光化学过程中，城市大气中有选择性地产生了极性有机物。3.在100 nm和200 nm两种粒径模式下，测量了东京大气气溶胶的吸湿特性。细颗粒物的吸湿生长因子从早上到中午增加，并进一步增加到晚上。这一发现与白天水溶性二羧酸和WSOC浓度增加一致。我们还发现，这种吸湿增长是更显着的200 nm的颗粒比100 nm的颗粒尺寸。颗粒的这些物理性质可能与气溶胶的化学组成有关。水溶性有机气溶胶的光化学产生之后似乎是有机气溶胶的光化学演化，即光化学老化的气溶胶可能更富含较大的颗粒。少

项目成果

Organic and inorganic compositions of marine aerosols from East Asia: Seasonal variations of water-soluble dicarboxylic acids, major ions, total carbon and nitrogen, and stable C and N isotopic composition

• DOI: 10.1016/s1873-9881(04)80019-1
• 发表时间: 2004
• 作者: K. Kawamura;Minoru Kobayashi;Nobuyuki Tsubonuma;M. Mochida;Tomomi Watanabe;Meehye Lee

T.Saito: "Stable carbon isotopic compositions of light hydrocarbons over the western North Pacific and implication for their photochemical ages"Journal of Geophysical Resserch. 107,D4. ACH2-1-ACH2-9 (2002)

T.Saito：“北太平洋西部轻质烃的稳定碳同位素组成及其光化学年龄的含义”地球物理研究杂志。

Variation on the atmospheric concentrations of biogenic carbonyl compounds and their removal processes in the northern forest at Moshiri, Hokkaido Island in Japan

• DOI: 10.1029/2003jd004100
• 发表时间: 2004-02-18
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
• 影响因子: 4.4
• 作者: Matsunaga, S;Mochida, M;Kawamura, K
• 通讯作者: Kawamura, K

Water-soluble dicarboxylic acids in the tropospheric aerosols collected by ACE-Asia/C-130 aircraft

ACE-Asia/C-130 飞机收集的对流层气溶胶中的水溶性二羧酸

• 发表时间: 2003
• 期刊: Journal of Geophysical Research Vol.108,No.D23,8639
• 作者: MURAKAMI Motohiko;et al.;Kimitaka Kawamura
• 通讯作者: Kimitaka Kawamura

K.Kawamura: "Four year observation of terrestrial lipid class compounds in marine aerosols from the western North Pacific"Global Biogeochemical Cycles. 17,No.1. 1003,doi:10.1029/2001/GB001810 (2003)

K.Kawamura：“对北太平洋西部海洋气溶胶中陆地脂质类化合物的四年观察”全球生物地球化学循环。