Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property
Peatland fires in Southeast Asia are an important source of primary organic aerosol (POA). Chemical aging of POA in the atmosphere produces oxygenated POA (OPOA). The OPOA production influences optical and hygroscopic properties, modulating the regional climate. However, the roles of environmental p...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170778 |
| _version_ | 1811681315916873728 |
|---|---|
| author | Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Kuwata, Mikinori |
| author2 | Earth Observatory of Singapore |
| author_facet | Earth Observatory of Singapore Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Kuwata, Mikinori |
| author_sort | Chen, Jing |
| collection | NTU |
| description | Peatland fires in Southeast Asia are an important source of primary organic aerosol (POA). Chemical aging of POA in the atmosphere produces oxygenated POA (OPOA). The OPOA production influences optical and hygroscopic properties, modulating the regional climate. However, the roles of environmental parameters such as relative humidity (RH) on chemical aging of peatland burning particles have rarely been investigated. Utilizing the potential aerosol mass (PAM) reactor, we conducted laboratory experiments for POA aging of particles generated from smoldering combustions of surface peat, fern, and Acacia leaves. The corresponding experiments for secondary organic aerosol formation were also separately conducted. Properties and chemical compositions of the resulting particle were quantified by both the hygroscopic tandem differential mobility analyzer and time-of-flight aerosol chemical speciation monitor (ToF-ACSM). Conversion of peat combustion from POA to OPOA was pronounced when RH in the PAM reactor was higher. Considering that previous electromicroscopic observations demonstrated that peat combustion POA is likely (semi)solid, we postulate that oxidation of fresh peatland burning particles is faster at an elevated RH due to reduced viscosity following hygroscopic growth. Hygroscopicity parameter (κ) of aged POA particles linearly correlated with the mass fraction of OPOA that was quantified by the ToF-ACSM. The above results highlight the importance of simultaneously measuring the chemical aging and particle phase state of peatland burning POA for quantifying their climatic impacts. |
| first_indexed | 2024-10-01T03:39:00Z |
| format | Journal Article |
| id | ntu-10356/170778 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:39:00Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1707782023-10-10T15:36:28Z Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Kuwata, Mikinori Earth Observatory of Singapore Science::Geology Chemical Aging Relative Humidity Peatland fires in Southeast Asia are an important source of primary organic aerosol (POA). Chemical aging of POA in the atmosphere produces oxygenated POA (OPOA). The OPOA production influences optical and hygroscopic properties, modulating the regional climate. However, the roles of environmental parameters such as relative humidity (RH) on chemical aging of peatland burning particles have rarely been investigated. Utilizing the potential aerosol mass (PAM) reactor, we conducted laboratory experiments for POA aging of particles generated from smoldering combustions of surface peat, fern, and Acacia leaves. The corresponding experiments for secondary organic aerosol formation were also separately conducted. Properties and chemical compositions of the resulting particle were quantified by both the hygroscopic tandem differential mobility analyzer and time-of-flight aerosol chemical speciation monitor (ToF-ACSM). Conversion of peat combustion from POA to OPOA was pronounced when RH in the PAM reactor was higher. Considering that previous electromicroscopic observations demonstrated that peat combustion POA is likely (semi)solid, we postulate that oxidation of fresh peatland burning particles is faster at an elevated RH due to reduced viscosity following hygroscopic growth. Hygroscopicity parameter (κ) of aged POA particles linearly correlated with the mass fraction of OPOA that was quantified by the ToF-ACSM. The above results highlight the importance of simultaneously measuring the chemical aging and particle phase state of peatland burning POA for quantifying their climatic impacts. Nanyang Technological University Published version This work was supported by the National Natural Science Founda-tion of China (Grant Nos. 42105075 and no. 42175121), the Singapore National Research Foundation (NRF) under its Singapore National Research Fellow-ship scheme (National Research Fellow Award, NRF2012NRF-NRFF001-031), the NRF Campus for Research Excellence and Technological Enterprise (CREATE) program (NRF2016-ITCOO1-021), and Nanyang Technological University. M.I. was funded by the Ministry of Education, Culture, Sports, Science, and Technology for Science Research of Japan (18H02238 and 19H05666) and Research Institute for Humanity and Nature (RIHN; Project No. 14200117). 2023-10-09T03:19:37Z 2023-10-09T03:19:37Z 2022 Journal Article Chen, J., Budisulistiorini, S. H., Itoh, M. & Kuwata, M. (2022). Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property. Journal of Geophysical Research: Atmospheres, 127(14), e2022JD036871-. https://dx.doi.org/10.1029/2022JD036871 2169-897X https://hdl.handle.net/10356/170778 10.1029/2022JD036871 2-s2.0-85134895993 14 127 e2022JD036871 en NRF2012NRF-NRFF001-031 Journal of Geophysical Research: Atmospheres © 2022. American Geophysical Union. All Rights Reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1029/2022JD036871 application/pdf |
| spellingShingle | Science::Geology Chemical Aging Relative Humidity Chen, Jing Budisulistiorini, Sri Hapsari Itoh, Masayuki Kuwata, Mikinori Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title | Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title_full | Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title_fullStr | Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title_full_unstemmed | Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title_short | Roles of relative humidity and particle size on chemical aging of tropical peatland burning particles: potential influence of phase state and implications for hygroscopic property |
| title_sort | roles of relative humidity and particle size on chemical aging of tropical peatland burning particles potential influence of phase state and implications for hygroscopic property |
| topic | Science::Geology Chemical Aging Relative Humidity |
| url | https://hdl.handle.net/10356/170778 |
| work_keys_str_mv | AT chenjing rolesofrelativehumidityandparticlesizeonchemicalagingoftropicalpeatlandburningparticlespotentialinfluenceofphasestateandimplicationsforhygroscopicproperty AT budisulistiorinisrihapsari rolesofrelativehumidityandparticlesizeonchemicalagingoftropicalpeatlandburningparticlespotentialinfluenceofphasestateandimplicationsforhygroscopicproperty AT itohmasayuki rolesofrelativehumidityandparticlesizeonchemicalagingoftropicalpeatlandburningparticlespotentialinfluenceofphasestateandimplicationsforhygroscopicproperty AT kuwatamikinori rolesofrelativehumidityandparticlesizeonchemicalagingoftropicalpeatlandburningparticlespotentialinfluenceofphasestateandimplicationsforhygroscopicproperty |