大气化学与气候课题组

Collaborative publication:Water-soluble organic aerosol in summer in Beijing

组内消息 2020-05-05

Molecular composition and sources of water-soluble organic aerosol in summer in Beijing

Highlights
• Water-soluble organic aerosol was the major fraction of OA in summer in Beijing.

• SOA from regional and photochemical processing contributed dominantly to WSOA.

• A high diversity of CHO and CHOS molecular compounds in WSOA was observed.

• Formation of more organosulfates during polluted days than clean days in summer.

Qiu, Y., Xu, W., Jia, L., He, Y., Fu, P., Zhang, Q., Xie, Q., Hou, S., Xie, C., Xu, Y., Wang, Z., Worsnop, D.R., Sun, Y., 2020. Molecular composition and sources of water-soluble organic aerosol in summer in Beijing. Chemosphere 255, 126850.

New publication: Role of liquid water in the formation of O3 and SOA

组内消息 2019-11-29

Role of liquid water in the formation of O3 and SOA particles from 1,2,3-trimethylbenzene

Highlights
• Liquid water can affect the formation of O3 and SOA from 1,2,3-trimethylbenzene.

• The hygroscopic growth factors of SOA from 1,2,3-trimethylbenzene were measured.

• Hydrolysis of N2O5 is the major reason for the decrease of O3.

• The major contribution of SOA under high LWC conditions comes from aqueous reaction.

Luo, H., Jia, L., Wan, Q., An, T., Wang, Y., 2019. Role of liquid water in the formation of O3 and SOA particles from 1,2,3-trimethylbenzene. Atmos. Environ. 217, 116955. https://doi.org/10.1016/j.atmosenv.2019.116955

Collaborative publication: Effect of RH on SOA from cyclohexene

组内消息 2019-05-19

Influence of relative humidity on cyclohexene SOA formation from OH photooxidation

Highlights
• Combined effects of OH and RH on cyclohexene SOA formation were studied.

• The formation of oligomers at high RH was responsible for the increase of the SOA yield.

• High RH increases the OH uptake coefficient of SOA, and promotes SOA aging.

• Oligomers formation mechanism from cyclohexene photooxidation at high RH was proposed.

Liu, S., Tsona, N.T., Zhang, Q., Jia, L., Xu, Y., Du, L., 2019. Influence of relative humidity on cyclohexene SOA formation from OH photooxidation. Chemosphere 231, 478–486. https://doi.org/10.1016/j.chemosphere.2019.05.131

Full text:https://doi.org/10.1016/j.chemosphere.2019.05.131