Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5612
Title: Asian emissions of CO and Noₓ : constraints from aircraft and Chinese station data
Authors: Wang, YX
McElroy, MB
Wang, T 
Palmer, PI
Keywords: Inversion
Asian emissions
Carbon monoxide
Nitrogen oxides
Issue Date: Dec-2004
Publisher: Wiley-Blackwell
Source: Journal of geophysical research. Atmospheres, Dec. 2004, v. 109, D24304, p.1-26 How to cite?
Journal: Journal of geophysical research. Atmospheres 
Abstract: Observations of CO and NO [sub y] from the Transport and Chemical Evolution over the Pacific (TRACE-P) aircraft mission over the northwest Pacific and from two Chinese ground stations (Hong Kong and Lin An) during spring 2001 are used in conjunction with an optimal estimation inverse model to constrain estimates of Asian emissions of CO and NOₓ . A priori emissions are based on a detailed bottom-up inventory for the observation period. The inversion analysis requires 43% and 47% increases in Chinese emissions of CO and NOₓ , respectively, distributed heterogeneously, with the largest adjustments required for central China. A posteriori estimates of emissions from biomass burning in Southeast Asia are much lower than a priori values. Inversion results for NOₓ emissions are consistent with CO emissions in terms of the sense of the adjustments. Inclusion of the station data in the inversion analysis significantly improves estimates for emissions from central and south China. A large increase in NOₓ emissions inferred for central China (a factor of 3) is attributed to decomposition of organic wastes associated with the human-animal food chain and extensive applications of chemical fertilizer. An analysis of emission ratios for CO relative to NOₓ for different sectors indicates that emissions attributed to industry and transportation may be underestimated in the bottom-up inventory for central China, while emissions from the domestic sector may be underestimated for south China. An increase in emission factors could help reconcile results from the inversion analysis with the “bottom-up” approach. Detailed analysis of the surface observations using a posteriori emissions indicates the importance of meteorological phenomena, notably cold fronts in March and small-scale high- and low-pressure systems in April in modulating concentrations of CO, with the latter most evident in the data from Lin An.
URI: http://hdl.handle.net/10397/5612
ISSN: 2169-897X
EISSN: 2169-8996
DOI: 10.1029/2004JD005250
Rights: Copyright 2004 by the American Geophysical Union
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Wang_Asian_CO_NOx.pdf2.22 MBAdobe PDFView/Open
Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

57
Last Week
0
Last month
0
Citations as of Aug 17, 2017

WEB OF SCIENCETM
Citations

62
Last Week
0
Last month
0
Citations as of Aug 20, 2017

Page view(s)

149
Last Week
1
Last month
Checked on Aug 20, 2017

Download(s)

147
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.