globalchange  > 全球变化的国际研究计划
DOI: 10.1016/j.scitotenv.2019.04.263
WOS记录号: WOS:000468188300005
论文题名:
Methane budget of East Asia, 1990-2015: A bottom-up evaluation
作者: Ito, Akihiko1,2; Tohjima, Yasunori1; Saito, Takuya1; Umezawa, Taku1; Hajima, Tomohiro2; Hirata, Ryuichi1; Saito, Makoto1; Terao, Yukio1
通讯作者: Ito, Akihiko
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
ISSN: 0048-9697
EISSN: 1879-1026
出版年: 2019
卷: 676, 页码:40-52
语种: 英语
英文关键词: Climate change ; Greenhouse gas ; Mitigation ; Regional budget
WOS关键词: GLOBAL METHANE ; EMISSION INVENTORY ; NATURAL WETLANDS ; AIR-POLLUTANTS ; RICE PADDIES ; FOSSIL-FUEL ; TERRESTRIAL ECOSYSTEMS ; MITIGATION OPTIONS ; GREENHOUSE GASES ; CHINA
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

The regional budget of methane (CH4) emissions for East Asia, a crucial region in the global greenhouse gas budget, was quantified for 1990-2015 with a bottom-up method based on inventories and emission model simulations. Anthropogenic emissions associated with fossil fuel extraction, industrial activities, waste management, and agricultural activities were derived from the Emission Database for Global Atmospheric Research version 4.3.2 and compared with other inventories. Emissions from natural wetlands and CH4 uptake by upland soil oxidation were estimated using the Vegetation Integrative Simulator for Trace gases (VISIT), a biogeochemical model that considers historical land use and climatic conditions. Emissions from biomass burning and termites were calculated using satellite and land-use data combined with empirical emission factors. The resulting average annual estimated CH4 budget for 2000-2012 indicated that East Asia was a net source of 67.3 Tg CH4 yr(-1), of which 88.8% was associated with anthropogenic emissions. The uncertainty (+/- standard deviation) of this estimate, +/- 14 Tg CH4 yr(-1), stemmed from data and model inconsistencies. The increase of the net flux from 602 Tg CH4 yr(-1) in 1990 to 78.0 Tg CH4 yr(-1) in 2012 was due mainly to increased emissions by the fossil fuel extraction and livestock sectors. Our results showed that CH4 was a crucial component of the regional greenhouse gas budget. A spatial analysis using 0.25 degrees x 0.25 degrees grid cells revealed emission hotspots in urban areas, agricultural areas, and wetlands. These hotspots were surrounded by weak sinks in upland areas. The estimated natural and anthropogenic emissions fell within the range of independent estimates, including top-down estimates from atmospheric inversion models. Such a regional accounting is an effective way to elucidate climatic forcings and to develop mitigation policies. Further studies, however, are required to reduce the uncertainties in the budget. (C) 2019 The Authors. Published by Elsevier B.V.


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被引频次[WOS]:32   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/145106
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan
2.Japan Agcy Marine Earth Sci & Technol, Yokohama, Kanagawa, Japan

Recommended Citation:
Ito, Akihiko,Tohjima, Yasunori,Saito, Takuya,et al. Methane budget of East Asia, 1990-2015: A bottom-up evaluation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,676:40-52
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