Annual distribution and atmospheric deposition of 210Po in aerosol in Busan, the largest port city in Korea

Title
Annual distribution and atmospheric deposition of 210Po in aerosol in Busan, the largest port city in Korea
Author(s)
Kim, Intae; Lee, Jaeeun; Lee, Hyun Mi
KIOST Author(s)
Kim, Intae(김인태)null이재은Lee, Hyun Mi(이현미)
Alternative Author(s)
김인태; 이재은; 이현미
Publication Year
2022-12-16
Abstract
The annual distributions of radionuclides, Po and Pb, were investigated in Busan, SouthKorea, whose regional atmosphere is largely affected by port infrastructure. Aerosol samples werecollected from Apr. 2019 to Feb. 2020 using a high-volume air sampler. The activities of Po and
Pb ranged from 0.01 – 0.40 mBq m (average=0.13±0.2 (1 σ) mBq m , n=90) and 0.10 – 1.7mBq m (average=0.65±0.9 (1 σ) mBq m
n=91), respectively. In contrast to Pb activity, whichwas relatively consistent in the entire sampling period, Po activity showed a variation of up to 3factors and was remarkably higher in the autumn and winter (Sep. to Feb.) relative to summeractivity (Jun. to Aug.). The substantially higher Po activity during the autumn and winterseasons was attributable to anthropogenic input from the vast port area surrounded by maritimeinfrastructures (e.g., shipyard, trade warehouse, factories, and ship anchorage), together withseasonal changes in wind directions. In Busan, the levels of Po and its dry depositional fl uxeswere comparable or slightly higher (1 – 2 times) than those in other regions worldwide. We alsoattempted to quantify the aerosol residence time based on a Po-Pb tracer, which suggestedthe mean aerosol residence time in Busan to be 41 to 48 days. These results imply that aerosolsthat exist in harbor cities can interact with and affect individuals and the surrounding society,where the influence is likely to last for weeks to months.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43745
Bibliographic Citation
AGU Fall Meeting 2022, 2022
Publisher
American Geophysical Union
Type
Conference
Language
English
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse