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DOI	10.5194/acp-23-809-2023
	Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest
	Leppla, Denis; Zannoni, Nora; Kremper, Leslie; Williams, Jonathan; Poehlker, Christopher; Sa, Marta; Solci, Maria Christina; Hoffmann, Thorsten
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	809
结束页码	820
卷号	23 期号:2 页码:12
英文摘要	Chiral chemodiversity plays a crucial role in biochemical processes such as insect and plant communication. However, the vast majority of organic aerosol studies do not distinguish between enantiomeric compounds in the particle phase. Here we report chirally specified measurements of secondary organic aerosol (SOA) at the Amazon Tall Tower Observatory (ATTO) at different altitudes during three measurement campaigns at different seasons. Analysis of filter samples by liquid chromatography coupled to mass spectrometry (LC-MS) has shown that the chiral ratio of pinic acid (C9H14O4) varies with increasing height above the canopy. A similar trend was recently observed for the gas-phase precursor alpha-pinene but more pronounced. Nevertheless, the measurements indicate that neither the oxidation of (+/-)-alpha-pinene nor the incorporation of the products into the particulate phase proceeds with stereo preference and that the chiral information of the precursor molecule is merely transferred to the low-volatility product. The observation of the weaker height gradient of the present enantiomers in the particle phase at the observation site can be explained by the significant differences in the atmospheric lifetimes of reactant and product. Therefore, it is suggested that the chiral ratio of pinic acid is mainly determined by large-scale emission processes of the two precursors, while meteorological, chemical, or physicochemical processes do not play a particular role. Characteristic emissions of the chiral aerosol precursors from different forest ecosystems, in some cases even with contributions from forest-related fauna, could thus provide large-scale information on the different contributions to biogenic secondary aerosols via the analytics of the chiral particle-bound degradation products.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000921591000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273167
作者单位	Johannes Gutenberg University of Mainz; Max Planck Society; Universidade Estadual de Londrina
推荐引用方式 GB/T 7714	Leppla, Denis,Zannoni, Nora,Kremper, Leslie,et al. Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest[J],2023,23(2):12.
APA	Leppla, Denis.,Zannoni, Nora.,Kremper, Leslie.,Williams, Jonathan.,Poehlker, Christopher.,...&Hoffmann, Thorsten.(2023).Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),12.
MLA	Leppla, Denis,et al."Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):12.