Dicarboxylic acids in the Arctic aerosols and snowpacks collected during ALERT 2000

摘要

Saturated (C_2-C_(11)) and unsaturated (C_4-C_5, C_8) dicarboxylic acids were measured in Arctic aerosol and surface snowpack samples collected during dark winter (February) and light spring (April-May) using a gas chromatography and gas chromatography/mass spectrometry. Their molecular distributions were characterized by a predominance of oxalic acid (C_2), except for few spring snowpack samples that showed the predominance of succinic acid (C_4). Concentrations of short-chain saturated diacids (C_3-C_5) and 4-ketopimelic acid in the aerosol samples increased by a factor of ～5 from winter to spring.