气候变化领域集成服务门户(CCPortal): Measurement report: Long-term measurements of aerosol precursor concentrations in the Finnish subarctic boreal forest

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DOI	10.5194/acp-22-2237-2022
	Measurement report: Long-term measurements of aerosol precursor concentrations in the Finnish subarctic boreal forest
	Jokinen, Tuija; Lehtipalo, Katrianne; Thakur, Roseline Cutting; Ylivinkka, Ilona; Neitola, Kimmo; Sarnela, Nina; Laitinen, Totti; Kulmala, Markku; Petaja, Tuukka; Sipila, Mikko
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2237
结束页码	2254
卷号	22 期号:4 页码:18
英文摘要	Aerosol particles form in the atmosphere via the clustering of certain atmospheric vapors. After growing into larger particles by the condensation of low-volatility gases, they can affect the Earth's climate by scattering light and acting as cloud condensation nuclei (CCN). Observations of low-volatility aerosol precursor gases have been reported around the world, but longer-term measurement series and any Arctic data sets showing seasonal variation are close to nonexistent. Here, we present similar to 7 months of aerosol precursor gas measurements performed with a nitrate-based chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometer. We deployed our measurements similar to 150 km north of the Arctic Circle at the SMEAR I (Station for Measuring Ecosystem-Atmosphere Relations) continental Finnish subarctic field station, located in the Varrio strict nature reserve. We report concentration measurements of the most common compounds related to new particle formation (NPF): sulfuric acid (SA), methane sulfonic acid (MSA), iodic acid (IA) and the total concentration of highly oxygenated organic molecules (HOMs). At this remote measurement site, SA originates from both anthropogenic and biological sources and has a clear diurnal cycle but no significant seasonal variation. MSA shows a more distinct seasonal cycle, with concentrations peaking in the summer. Of the measured compounds, IA concentrations are the most stable throughout the measurement period, except in April during which time the concentration of IA is significantly higher than during the rest of the year. Otherwise, IA has almost identical daily maximum concentrations in spring, summer and autumn, and on NPF event or non-event days. HOMs are abundant during the summer months and low in the autumn months. Due to their low autumn concentrations and high correlation with ambient air temperature, we suggest that most HOMs are products of biogenic emissions, most probably monoterpene oxidation products. NPF events at SMEAR I happen under relatively low-temperature (1-8 degrees C) conditions, with a fast temperature rise in the early morning hours as well as lower and decreasing relative humidity (RH, 55% vs. 80 %) during NPF days compared with non-event days. NPF days have clearly higher global irradiance values (similar to 450 m(-2) vs. similar to 200 m(-2) and about 10 ppbv higher ozone concentrations than non-event days. During NPF days, we have, on average, higher SA concentrations, peaking at noon; higher MSA concentrations in the afternoon; and slightly higher IA concentration than during non-event days. In summary, these are the first long-term measurements of aerosol-forming vapors from SMEAR I in the subarctic region, and the results of this work will help develop an understanding of atmospheric chemical processes and aerosol formation in the rapidly changing Arctic.
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:000760391000001
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/273504
作者单位	University of Helsinki; Finnish Meteorological Institute
推荐引用方式 GB/T 7714	Jokinen, Tuija,Lehtipalo, Katrianne,Thakur, Roseline Cutting,et al. Measurement report: Long-term measurements of aerosol precursor concentrations in the Finnish subarctic boreal forest[J],2022,22(4):18.
APA	Jokinen, Tuija.,Lehtipalo, Katrianne.,Thakur, Roseline Cutting.,Ylivinkka, Ilona.,Neitola, Kimmo.,...&Sipila, Mikko.(2022).Measurement report: Long-term measurements of aerosol precursor concentrations in the Finnish subarctic boreal forest.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(4),18.
MLA	Jokinen, Tuija,et al."Measurement report: Long-term measurements of aerosol precursor concentrations in the Finnish subarctic boreal forest".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.4(2022):18.