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Data Assimilation of AOD and Estimation of Surface Particulate Matters over the Arctic

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Title
Data Assimilation of AOD and Estimation of Surface Particulate Matters over the Arctic
Other Titles
에어로졸 광학깊이 자료동화와 북극의 지표면 입자 예측
Authors
Han, Kyung M.
Jung, Chang H.
Park, Rae-Seol
Park, Soon-Young
Lee, Sojin
Kulmala, Markku
Petaja, Tuukka
Karasinski, Grzegorz
Sobolewski, Piotr
Yoon, Young Jun
Lee, Bang Yong
Kim, Kiyeon
Kim, Hyun S.
Subject
Chemistry; Engineering; Materials Science; Physics
Keywords
CMAQ model; MODIS; AERONET; aerosol optical depth; optimal interpolation; Arctic; data assimilation; PMs
Issue Date
2021-02
Citation
Kyung M. Han, et al. 2021. "Data Assimilation of AOD and Estimation of Surface Particulate Matters over the Arctic". APPLIED SCIENCES-BASEL, 11(4): 1959-1976.
Abstract
In this study, more accurate information on the levels of aerosol optical depth (AOD) was calcu-lated from the assimilation of the modeled AOD based on the optimal interpolation method. Also, more realistic levels of surface particulate matters over the Arctic were estimated using the assimilated AOD based on the linear relationship between the particulate matters and AODs. In comparison to the MODIS observation, the assimilated AOD was much improved compared with the modeled AOD (e.g., increase in correlation coefficients from -0.15 ? 0.26 to 0.17 ? 0.76 over the Arctic). The newly inferred monthly averages of PM10 and PM2.5 for April ? September 2008 were 2.18 ? 3.70 μg m-3 and 0.85 ? 1.68 μg m-3 over the Arctic, respectively. These corre-sponded to an increase of 140-180%, compared with the modeled PMs. In comparison to in-situ observation, the inferred PMs showed better performances than those from the simulations, par-ticularly at Hyytiala station. Therefore, combining the model simulation and data assimilation provided more accurate concentrations of AOD, PM10, and PM2.5 than those only calculated from the model simulations.
URI
https://repository.kopri.re.kr/handle/201206/11773
DOI
http://dx.doi.org/10.3390/app11041959
Appears in Collections  
2020-2020, Arctic permafrost environment change monitoring and prediction method developments (20-20) / Lee, Bang Yong (PN20081)
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