气候变化领域集成服务门户(CCPortal): Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations

CCPortal

DOI	10.5194/acp-21-9455-2021
	Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations
	Niwa Y.; Sawa Y.; Nara H.; Machida T.; Matsueda H.; Umezawa T.; Ito A.; Nakaoka S.-I.; Tanimoto H.; Tohjima Y.
发表日期	2021
ISSN	1680-7316
起始页码	9455
结束页码	9473
卷号	21 期号:12
英文摘要	Inverse analysis was used to estimate fire carbon emissions in Equatorial Asia induced by the big El Niño event in 2015. This inverse analysis is unique because it extensively used high-precision atmospheric mole fraction data of carbon dioxide (CO2) from the commercial aircraft observation project CONTRAIL. Through comparisons with independent shipboard observations, especially carbon monoxide (CO) data, the validity of the estimated fire-induced carbon emissions was demonstrated. The best estimate, which used both aircraft and shipboard CO2 observations, indicated 273ĝ€¯Tgĝ€¯C for fire emissions from September-October 2015. This 2-month period accounts for 75ĝ€¯% of the annual total fire emissions and 45ĝ€¯% of the annual total net carbon flux within the region, indicating that fire emissions are a dominant driving force of interannual variations of carbon fluxes in Equatorial Asia. Several sensitivity experiments demonstrated that aircraft observations could measure fire signals, though they showed a certain degree of sensitivity to prior fire-emission data. The inversions coherently estimated smaller fire emissions than the prior data, partially because of the small contribution of peatland fires indicated by enhancement ratios of CO and CO2 observed by the ship. In future warmer climate conditions, Equatorial Asia may experience more severe droughts, which risks releasing a large amount of carbon into the atmosphere. Therefore, the continuation of aircraft and shipboard observations is fruitful for reliable monitoring of carbon fluxes in Equatorial Asia. © Copyright:
语种	英语
scopus关键词	airborne survey; carbon emission; carbon monoxide; comparative study; estimation method; experimental study; in situ measurement; inverse analysis; monitoring system; precision; research vessel; Asia
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/246787
作者单位	National Institute for Environmental Studies, Tsukuba, Japan; Meteorological Research Institute, Tsukuba, Japan; Japan Meteorological Agency, Tokyo, Japan; Dokkyo University, Soka, Japan
推荐引用方式 GB/T 7714	Niwa Y.,Sawa Y.,Nara H.,et al. Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations[J],2021,21(12).
APA	Niwa Y..,Sawa Y..,Nara H..,Machida T..,Matsueda H..,...&Tohjima Y..(2021).Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(12).
MLA	Niwa Y.,et al."Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.12(2021).