Published March 8, 2023 | Version v1
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Molecular and 13C isotopic composition of diacids and related compounds in wintertime PM2.5 at three sites over Northeast Asia – Data set

Authors/Creators

  • 1. Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
  • 2. Gas Metrology Group, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Republic of Korea

Description

To investigate the spatial changes in atmospheric organic aerosols (OA) loading and composition over the northeast Asian region, fine aerosols (PM2.5) were collected at three sites: Tianjin (TJ), North China and in Padori (PD) and Daejeon (DJ), South Korea, during winter 2019. We studied the molecular distributions and compound-specific carbon isotopic composition (δ13C) of dicarboxylic acids (diacids), oxocarboxylic acids (oxoacids) and α-dicarbonyls as well as the carbonaceous and inorganic ionic components in two sets of selected samples, representing a clean and a polluted period, during the campaign. Based on the molecular distributions and δ13C of diacids and related compounds and mass ratios and linear relations of selected species, we discuss the origins of OA and the influence of long-range transported air masses on their loading and composition over Northeast Asia.

Notes

Acknowledgements. This work was partly funded by the National Natural Science Foundation of China (Grant Nos. 41775120 & 42277090), China, and a grant (22011085) from the Korea Research Institute of Standards and Science (KRISS) under the establishment of measurement standard for secondary nitrogen oxide.

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