Seasonal variation of water-soluble inorganic species in the coarse and fine atmospheric aerosols at Dar es Salaam, Tanzania

2009 ◽  
Vol 267 (17) ◽  
pp. 2897-2902 ◽  
Author(s):  
Stelyus L. Mkoma ◽  
Wan Wang ◽  
Willy Maenhaut
Keyword(s):  
Seasonal Variation ◽  
Atmospheric Aerosols ◽  
Dar Es Salaam ◽  
Water Soluble ◽  
Inorganic Species

Seasonal variation of water-soluble ion species in the atmospheric aerosols at the summit of Mt. Fuji

2008 ◽  
Vol 42 (34) ◽  
pp. 8027-8035 ◽  
Author(s):  
Issei Suzuki ◽  
Kazuhiko Hayashi ◽  
Yasuhito Igarashi ◽  
Hiroshi Takahashi ◽  
Yousuke Sawa ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Atmospheric Aerosols ◽  
Water Soluble ◽  
Ion Species ◽  
Soluble Ion

scholarly journals Size-Segregated Atmospheric Humic-Like Substances (HULIS) in Shanghai: Abundance, Seasonal Variation, and Source Identification

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 526
Author(s):  
Tianming Sun ◽  
Rui Li ◽  
Ya Meng ◽  
Yu Han ◽  
Hanyun Cheng ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Size Distribution ◽  
Principal Component ◽  
Water Soluble ◽  
Atmospheric Particulate Matter ◽  
Biomass Combustion ◽  
Vehicle Exhaust ◽  
Total Suspended Particulates ◽  
Condensation Mode ◽  
Water Soluble Organic Carbon

Humic-like substances (HULIS) are of great interest due to their optical and chemical characteristics. In this study, a total of 180 samples of atmospheric particulate matter (PM) of different sizes were collected from summer 2018 to spring 2019, in order to analyze the size distribution, to investigate the seasonal variation and then to identify the key sources of HULIS. The annual mean concentration of HULIS in the total suspended particulates reached 5.12 ± 1.42 μg/m3. The HULIS concentration was extremely higher in winter (8.35 ± 2.06 μg/m3) than in autumn (4.88 ± 0.95 μg/m3), in summer (3.62 ± 1.68 μg/m3) and in spring (3.36 ± 0.99 μg/m3). The average annual ratio of water-soluble organic carbon (WSOC) to OC and the ratio of HULIS to WSOC reached 0.546 ± 0.092 and 0.56 ± 0.06, respectively. Throughout the whole year, the size distributions of WSOC and HULIS-C were relatively smooth. The peaks of WSOC appeared at 1.8~3.2 μm and 0.56~1.0 μm, while the peaks of HULIS-C were located at 3.2~5.6 μm, 1.0~1.8 μm and 0.18~0.32 μm. The distribution of the HULIS particle mode was similar in spring, summer and autumn, while there was a lower proportion of the coarse mode and a higher proportion of the condensation mode in winter. By using the comprehensive analysis of principal component analysis (PCA), air mass backward trajectories (AMBTs) and fire point maps, key sources of WSOC and HULIS in Shanghai were identified as biomass combustion (48.42%), coal combustion (17.49%), secondary formation (16.07%) and vehicle exhaust (5.37%). The remaining part might be contributed by crustal dust sources, marine sources and/or other possible sources. This study provides new insight into the characteristics and size distribution of HULIS in Shanghai, thereby providing a practical base for further modeling.

Seasonal variation in atmospheric aerosols concentration covering northern Kyushu, Japan and Seoul, Korea

1996 ◽  
Vol 30 (13) ◽  
pp. 2343-2354 ◽  
Author(s):  
Shinji Wakamatsu ◽  
Akira Utsunomiya ◽  
Jin Suk Han ◽  
Atsuko Mori ◽  
Itsushi Uno ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Atmospheric Aerosols
Sign in / Sign up

Export Citation Format

Share Document