Substantial non-growing season carbon dioxide loss across Tibetan alpine permafrost region

doi:10.1111/gcb.16315

	Substantial non-growing season carbon dioxide loss across Tibetan alpine permafrost region
	Li, Qinlu 1; Liu, Yang 2; Kou, Dan 3; Peng, Yunfeng ; Yang, Yuanhe1
	2022
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	28 期号:17 页码:5200-5210
摘要	One of the major uncertainties for projecting permafrost carbon (C)-climate feedback is a poor representation of the non-growing season carbon dioxide (CO2) emissions under a changing climate. Here, combining in situ field observations, regional synthesis and a random forest model, we assessed contemporary and future soil respired CO2 (i.e., soil respiration, R-s) across the Tibetan alpine permafrost region, which has received much less attention compared with the Arctic permafrost domain. We estimated the regional mean R-s of 229.8, 72.9 and 302.7 g C m(-2) year(-1) during growing season, non-growing season and the entire year, respectively; corresponding to the contemporary losses of 296.9, 94.3 and 391.2 Tg C year(-1) from this high-altitude permafrost-affected area. The non-growing season R-s accounted for a quarter of the annual soil CO2 efflux. Different from the prevailing view that temperature is the most limiting factor for cold-period CO2 release in Arctic permafrost ecosystems, precipitation determined the spatial pattern of non-growing season R-s on the Tibetan Plateau. Using the key predictors, model extrapolation demonstrated additional losses of 38.8 and 74.5 Tg C from the non-growing season for a moderate mitigation scenario and a business-as-usual emissions scenario, respectively. These results provide a baseline for non-growing season CO2 emissions from high-altitude permafrost areas and help for accurate projection of permafrost C-climate feedback.
关键词	alpine grasslands CO2 flux soil respiration Tibetan Plateau winter time
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.16315
收录类别	SCI
语种	英语
WOS关键词	GRASSLAND ; RESPONSES ; PATTERNS ; NITROGEN ; CO2 ; RESPIRATION ; ECOSYSTEMS ; EMISSIONS ; BIOMASS ; TUNDRA
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000821536000001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences [XDA26020201] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) [2019QZKK0302, 2019QZKK0106] ; National Natural Science Foundation of China [31825006, 31988102] ; Youth Innovation Promotion Association CAS [2018106]
作者邮箱	pengyf@ibcas.ac.cn ; yhyang@ibcas.ac.cn
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28628
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Hebei Agr Univ, Coll Resources & Environm Sci, Key Lab Farmland Ecoenvironm Hebei, Baoding, Peoples R China 4.Univ Eastern Finland, Dept Biol & Environm Sci, Biogeochem Res Grp, Kuopio, Finland
推荐引用方式 GB/T 7714	Li, Qinlu,Liu, Yang,Kou, Dan,et al. Substantial non-growing season carbon dioxide loss across Tibetan alpine permafrost region[J]. GLOBAL CHANGE BIOLOGY,2022,28(17):5200-5210.
APA	Li, Qinlu,Liu, Yang,Kou, Dan,Peng, Yunfeng,&Yang, Yuanhe.(2022).Substantial non-growing season carbon dioxide loss across Tibetan alpine permafrost region.GLOBAL CHANGE BIOLOGY,28(17),5200-5210.
MLA	Li, Qinlu,et al."Substantial non-growing season carbon dioxide loss across Tibetan alpine permafrost region".GLOBAL CHANGE BIOLOGY 28.17(2022):5200-5210.

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