Molecular characterization of size-segregated organic aerosols in the urban boundary layer in wintertime Beijing by FT-ICR MS

2021 ◽  
Author(s):  
Qiaorong Xie ◽  
Sihui Su ◽  
Shuang Chen ◽  
Qiang Zhang ◽  
Siyao Yue ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Size Distribution ◽  
Molecular Characterization ◽  
Organic Aerosols ◽  
Urban Boundary Layer ◽  
Vertical Profiles ◽  
Unique Information ◽  
Ft Icr Ms ◽  
Ft Icr

Our study provides unique information on the vertical profiles and size distribution of urban organic aerosols by FT-ICR MS.

scholarly journals Measurement report: Vertical distribution of biogenic and anthropogenic secondary organic aerosols in the urban boundary layer over Beijing during late summer

2021 ◽  
Author(s):  
Hong Ren ◽  
Wei Hu ◽  
Lianfang Wei ◽  
Siyao Yue ◽  
Jian Zhao ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Atmospheric Chemistry ◽  
Secondary Organic Aerosols ◽  
Organic Aerosols ◽  
Late Summer ◽  
Urban Boundary Layer ◽  
Vertical Profiles ◽  
Emission Controls ◽  
Vertical Distributions ◽  
Modelling Studies

Abstract. Secondary organic aerosols (SOA) play a significant role in atmospheric chemistry. However, little is known about the vertical profiles of SOA in the urban boundary layer (UBL). This gap in the knowledge constrains the SOA simulation in chemical transport models. Here, we synchronously collected aerosol samples at 8 m, 120 m and 260 m based on a 325-m meteorological tower in urban Beijing from August 15th to September 10th, 2015. Strict emission controls were implemented during this period for the 2015 China Victory Day Parade. The sum of biogenic SOA tracers increased with height. The fraction of SOA from isoprene oxidation increased, whereas the fraction of monoterpene and sesquiterpene SOA decreased with height. The 2,3-dihydroxy-4-oxopentanoic acid (DHOPA), one tracer of anthropogenic SOA from toluene oxidation, also increased with height. The complicated vertical profiles of SOA tracers highlighted the needs to measure SOA within the UBL. The sum of estimated secondary organic carbon (SOC) ranged from 341 to 673 ngC m−3. The increase in the SOC fraction from isoprene and toluene with height was found to be more related to regional transport whereas the decrease in the SOC from monoterpene and sesquiterpene with height was more subject to local emissions. Emission controls during the parade reduced SOC by 4–35 % with toluene SOC decreasing more than the other SOC. This study demonstrates that vertical distributions of SOA within the UBL are complex, and the vertical profiles of SOA concentrations and sources should be considered in the future field and modelling studies.

Molecular characterization of sulfur compounds in some specieal sulfur-rich Chinese crude oils by FT-ICR MS

2013 ◽  
Vol 57 (6) ◽  
pp. 1158-1167 ◽  
Author(s):  
Hong Lu ◽  
Quan Shi ◽  
QingLin Ma ◽  
Yang Shi ◽  
JinZhong Liu ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Sulfur Compounds ◽  
Crude Oils ◽  
Ft Icr Ms ◽  
Ft Icr

scholarly journals Development of Standard for Quantitative Molecular Characterization of Dissolved Organic Matter by FT-ICR MS

2020 ◽  
Author(s):  
Chen He ◽  
Yahe Zhang ◽  
Yunyun Li ◽  
Xiaocun Zhuo ◽  
Yuguo Li ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Characterization ◽  
Ft Icr Ms ◽  
Ft Icr

scholarly journals Characterization of Heavy Oil by FT-ICR MS Coupled with Various Ionization Techniques

2009 ◽  
Vol 52 (4) ◽  
pp. 159-171 ◽  
Author(s):  
Keiko Miyabayashi ◽  
Yasuhide Naito ◽  
Mikio Miyake
Keyword(s):  
Heavy Oil ◽  
Ft Icr Ms ◽  
Ft Icr
Sign in / Sign up

Export Citation Format

Share Document