气候变化领域集成服务门户(CCPortal): Simultaneous shipborne measurements of CO2; CH4 and CO and their application to improving greenhouse-gas flux estimates in Australia

CCPortal

DOI	10.5194/acp-19-7055-2019
	Simultaneous shipborne measurements of CO2; CH4 and CO and their application to improving greenhouse-gas flux estimates in Australia
	Bukosa B.; Deutscher N.M.; Fisher J.A.; Kubistin D.; Paton-Walsh C.; Griffith D.W.T.
发表日期	2019
ISSN	16807316
起始页码	7055
结束页码	7072
卷号	19 期号:10
英文摘要	Quantitative understanding of the sources and sinks of greenhouse gases is essential for predicting greenhouse-gas-climate feedback processes and their impacts on climate variability and change. Australia plays a significant role in driving variability in global carbon cycling, but the budgets of carbon gases in Australia remain highly uncertain. Here, shipborne Fourier transform infrared spectrometer measurements collected around Australia are used together with a global chemical transport model (GEOS-Chem) to analyse the variability of three direct and indirect carbon greenhouse gases: carbon dioxide (CO2), methane (CH4) and carbon monoxide (CO). Using these measurements, we provide an updated distribution of these gases. From the model, we quantify their sources and sinks, and we exploit the benefits of multi-species analysis to explore co-variations to constrain relevant processes. We find that for all three gases, the eastern Australian coast is largely influenced by local anthropogenic sources, while the southern, western and northern coasts are characterised by a mixture of anthropogenic and natural sources. Comparing coincident and co-located enhancements in the three carbon gases highlighted several common sources from the Australian continent. We found evidence for 17 events with similar enhancement patterns indicative of co-emission and calculated enhancement ratios and modelled source contributions for each event. We found that anthropogenic co-enhancement events are common along the eastern coast, while co-enhancement events in the tropics primarily derive from biomass burning sources. While the GEOS-Chem model generally reproduced the timing of co-enhancement events, it was less able to reproduce the magnitude of enhancements. We used these differences to identify underestimated, overestimated and missing processes in the model. We found model overestimates of CH4 from coal burning and underestimates of all three gases from biomass burning. We identified missing sources from fossil fuel, biofuel, oil, gas, coal, livestock, biomass burning and the biosphere in the model, pointing to the need to further develop and evaluate greenhouse-gas emission inventories for the Australian continent. © Author(s) 2019.
语种	英语
scopus关键词	anthropogenic source; biomass burning; carbon dioxide; carbon monoxide; climate feedback; emission inventory; FTIR spectroscopy; greenhouse gas; marine atmosphere; methane; pollution monitoring; quantitative analysis; shipborne measurement; source-sink dynamics; Australia
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144379
作者单位	School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, Australia; German Meteorological Service, Meteorological Observatory Hohenpeißenberg, Hohenpeißenberg, Germany
推荐引用方式 GB/T 7714	Bukosa B.,Deutscher N.M.,Fisher J.A.,et al. Simultaneous shipborne measurements of CO2; CH4 and CO and their application to improving greenhouse-gas flux estimates in Australia[J],2019,19(10).
APA	Bukosa B.,Deutscher N.M.,Fisher J.A.,Kubistin D.,Paton-Walsh C.,&Griffith D.W.T..(2019).Simultaneous shipborne measurements of CO2; CH4 and CO and their application to improving greenhouse-gas flux estimates in Australia.Atmospheric Chemistry and Physics,19(10).
MLA	Bukosa B.,et al."Simultaneous shipborne measurements of CO2; CH4 and CO and their application to improving greenhouse-gas flux estimates in Australia".Atmospheric Chemistry and Physics 19.10(2019).