SEASONAL VARIATION OF LOW MOLECULAR WEIGHT DICARBOXYLIC ACIDS IN THE ARCTIC ATMOSPHERE

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概要

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• Normal saturated dicarboxylic acids (C_2-C_<11>) and unsaturated diacids (maleic, fumaric, methylmaleic, phthalic acids) were detected in Arctic aerosol samples collected from Alert (82.5°N, 62.3°W), Canada, in 1987-1988,by capillary gas chromatography (GC) and GC-mass spectrometry employing dibutyl ester derivatization. In addition to diacids, ω-oxo acids (C_2-C_5,C_9), pyruvic acid and α-dicarbonyls (methylglyoxal and glyoxal) were detected. Oxalic (C_2) acid was generally found as a dominant diacid species (1.8-70ng/m^3,av. 14±12ng/m^3) followed by malonic (C3; 0.05-19ng/m^3,av. 2.5±3.3ng/m^3) and succinic (C_4; 0.51-18ng/m^3,av. 3.8±3.5ng/m^3) acids throughout all seasons. Total concentrations of dicarboxylic acids showed seasonal variation (4.3-97ng/m^3,av. 25±20ng/m^3), with two maxima both in September to October and in March to April. The autumn peak was suggested to be caused by enhanced contributions from both biogenic and anthropogenic sources followed by photo-chemical reactions, because this was consistent with higher concentrations of η-alkanes from terrestrial plant waxes and of soil-derived aluminum in the autumn aerosol samples. On the other hand, the spring peak was observed during the period of "Arctic Sunrise". This result suggested that diacids in the spring aerosols were secondarily produced by photochemical reactions of organic pollutants carried into the Arctic during the winter season, with O_3 and OH radicals which were produced under a strong solar radiation.

• 国立極地研究所の論文

著者

• Kawamura Kimitaka

  Department Of Chemistry Faculty Of Science Tokyo Metropolitan University

• KASUKABE Hideki

  Department of Chemistry, Faculty of Science, Tokyo Metropolitan University

• BARRIE Leonard

  Atmospheric Environment Service

• Kasukabe Hideki

  Department Of Chemistry Faculty Of Science Tokyo Metropolitan University

関連論文

• Vertical distributions of low molecular weight dicarboxylic acids in the Greenland ice core (scientific paper)
• DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN THE ICE CORE SAMPLES FROM GREENLAND
• VERTICAL PROFILES OF TOTAL ORGANIC CARBON AND POLAR ORGANIC COMPOUNDS IN THE ICE CORE FROM SITE-J, GREENLAND
• HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND
• CONCENTRATION CHANGES OF DICARBOXYLIC ACIDS AND WATER SOLUBLE ORGANIC CARBON IN THE ARCTIC AEROSOLS AT POLAR SUNRISE
• CONCENTRATION CHANGES OF MSA AND MAJOR IONS IN ARCTIC AEROSOLS DURING POLAR SUNRISE
• DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION
• SEASONAL VARIATION OF LOW MOLECULAR WEIGHT DICARBOXYLIC ACIDS IN THE ARCTIC ATMOSPHERE
• VERTICAL DISTRIBUTIONS OF LOW MOLECULAR WEIGHT DICARBOXYLIC ACIDS IN THE H15 ICE CORE FROM ANTARCTICA
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• Organic Geochemistry of a 200-meter Core Sample from Lake Biwa. IV : Variation of Fatty Acid Composition in the Upper 5-meter Layers

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