Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-1801-2019 |
A top-down assessment using OMI NO2 suggests an underestimate in the NOx emissions inventory in Seoul, South Korea, during KORUS-AQ | |
Goldberg, Daniel L.1,2; Saide, Pablo E.3; Lamsal, Lok N.4,5; de Foy, Benjamin6; Lu, Zifeng1,2; Woo, Jung-Hun7; Kim, Younha7; Kim, Jinseok7; Gao, Meng8; Carmichael, Gregory9; Streets, David G.1,2 | |
2019-02-08 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:3页码:1801-1818 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; South Korea |
英文摘要 | In this work, we investigate the NOx emissions inventory in Seoul, South Korea, using a regional ozone monitoring instrument (OMI) NO2 product derived from the standard NASA product. We first develop a regional OMI NO2 product by recalculating the air mass factors using a high-resolution (4 km x 4 km) WRF-Chem model simulation, which better captures the NO2 profile shapes in urban regions. We then apply a model-derived spatial averaging kernel to further downscale the retrieval and account for the subpixel variability. These two modifications yield OMI NO2 values in the regional product that are 1.37 times larger in the Seoul metropolitan region and > 2 times larger near substantial point sources. These two modifications also yield an OMI NO2 product that is in better agreement with the Pandora NO2 spectrometer measurements acquired during the South Korea-United States Air Quality (KORUS-AQ) field campaign. NOx emissions are then derived for the Seoul metropolitan area during the KORUS-AQ field campaign using a top-down approach with the standard and regional NASA OMI NO2 products. We first apply the top-down approach to a model simulation to ensure that the method is appropriate: the WRF-Chem simulation utilizing the bottom-up emissions inventory yields a NOx emissions rate of 227 +/- 94 kt yr(-1), while the bottom-up inventory itself within a 40 km radius of Seoul yields a NOx emissions rate of 198 kt yr(-1). Using the top-down approach on the regional OMI NO2 product, we derive the NOx emissions rate from Seoul to be 484 +/- 201 kt yr(-1), and a 353 +/- 146 kt yr(-1) NOx emissions rate using the standard NASA OMI NO2 product. This suggests an underestimate of 53% and 36% in the bottom-up inventory using the regional and standard NASA OMI NO2 products respectively. To supplement this finding, we compare the NO2 and NOy simulated by WRF-Chem to observations of the same quantity acquired by aircraft and find a model underestimate. When NOx emissions in the WRF-Chem model are increased by a factor of 2.13 in the Seoul metropolitan area, there is better agreement with KORUS-AQ aircraft observations and the recalculated OMI NO2 tropospheric columns. Finally, we show that by using a WRF-Chem simulation with an updated emissions inventory to recalculate the air mass factor (AMF), there are small differences (similar to 8 %) in OMI NO2 compared to using the original WRF-Chem simulation to derive the AMF. This suggests that changes in model resolution have a larger effect on the AMF calculation than modifications to the South Korean emissions inventory. Although the current work is focused on South Korea using OMI, the methodology developed in this work can be applied to other world regions using TROPOMI and future satellite datasets (e.g., GEMS and TEMPO) to produce high-quality region-specific top-down NOx emissions estimates. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458116900009 |
WOS关键词 | EASTERN UNITED-STATES ; TROPOSPHERIC NO2 ; AIR-QUALITY ; COLUMN DENSITIES ; NITROGEN-OXIDES ; ANTHROPOGENIC EMISSIONS ; SATELLITE RETRIEVALS ; SURFACE REFLECTANCE ; DOAS MEASUREMENTS ; DATA ASSIMILATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27303 |
专题 | 地球科学 |
作者单位 | 1.Argonne Natl Lab, Energy Syst Div, 9700 S Cass Ave, Argonne, IL 60439 USA; 2.Univ Chicago, Consortium Adv Sci & Engn, Chicago, IL 60637 USA; 3.Univ Calif Los Angeles, Inst Environm & Sustainabil, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 4.Univ Space Res Assoc, Goddard Earth Sci Technol & Res, Columbia, MD 21046 USA; 5.NASA, Goddard Space Flight Ctr, Code 614, Greenbelt, MD 20771 USA; 6.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA; 7.Konkuk Univ, Seoul 05029, South Korea; 8.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 9.Univ Iowa, Dept Chem & Biochem Engn, Iowa City, IA 52242 USA |
推荐引用方式 GB/T 7714 | Goldberg, Daniel L.,Saide, Pablo E.,Lamsal, Lok N.,et al. A top-down assessment using OMI NO2 suggests an underestimate in the NOx emissions inventory in Seoul, South Korea, during KORUS-AQ[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(3):1801-1818. |
APA | Goldberg, Daniel L..,Saide, Pablo E..,Lamsal, Lok N..,de Foy, Benjamin.,Lu, Zifeng.,...&Streets, David G..(2019).A top-down assessment using OMI NO2 suggests an underestimate in the NOx emissions inventory in Seoul, South Korea, during KORUS-AQ.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(3),1801-1818. |
MLA | Goldberg, Daniel L.,et al."A top-down assessment using OMI NO2 suggests an underestimate in the NOx emissions inventory in Seoul, South Korea, during KORUS-AQ".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.3(2019):1801-1818. |
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