干旱区生态环境知识资源中心(Arid): Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model

Arid

DOI	10.1016/j.catena.2021.105168
	Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model
	Ma, Wensi; Wu, Tonghua; Wu, Xiaodong; Yue, Guangyang; Li, Ren; Li, Xiangfei; Zhu, Xiaofan; Hu, Guojie; Qiao, Yongping; Hao, Junming; Ni, Jie
通讯作者	Wu, TH (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Peoples R China. ; Wu, TH (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Wu, TH (corresponding author), Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	200
英文摘要	Permafrost carbon could produce a positive climate feedback. Until now, the ecosystem carbon budgets in the permafrost regions remain uncertain. Moreover, the frequently used models have some limitations especially regarding to the freeze-thaw process. Herein, we improved the IBIS model by incorporating an unfrozen water scheme and by specifying the parameters to estimate the present and future carbon budget of different land cover types (desert steppe, steppe, meadow, and wet meadow) in the permafrost regions. Incorporating an unfrozen water scheme reduced the mean errors in the soil temperature and soil water content by 25.2%, and the specifying leaf area parameters reduced the errors in the net primary productivity (NPP) by 79.9%. Further, the simulation results showed that steppes are carbon sources (39.16 gC/m(2)/a) and the meadows are carbon sinks (-63.42 gC/m(2)/a ). Under the climate warming scenarios of RCP 2.6, RCP 6.0, and RCP 8.5, the desert steppe and alpine steppe would assimilated more carbon, while the meadow and wet meadow were projected to shift from carbon sinks to carbon sources in 2071-2100, implying that the land cover type plays an important role in simulating the source/sink effects of permafrost ecosystem carbon in the IBIS model. The results highlight the importance of unfrozen water to the soil hydrothermal regime and specific leaf area for the growth of alpine vegetation, and present new insights on the difference of the responses of various permafrost ecosystems to climate warming.
英文关键词	Carbon budget Permafrost IBIS Unfrozen water content RCP scenarios
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000620777400030
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349796
作者单位	[Ma, Wensi; Wu, Tonghua; Wu, Xiaodong; Yue, Guangyang; Li, Ren; Li, Xiangfei; Zhu, Xiaofan; Hu, Guojie; Qiao, Yongping; Hao, Junming; Ni, Jie] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730000, Peoples R China; [Ma, Wensi; Wu, Tonghua; Wu, Xiaodong; Li, Ren; Li, Xiangfei; Hao, Junming; Ni, Jie] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China
推荐引用方式 GB/T 7714	Ma, Wensi,Wu, Tonghua,Wu, Xiaodong,et al. Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model[J],2021,200.
APA	Ma, Wensi.,Wu, Tonghua.,Wu, Xiaodong.,Yue, Guangyang.,Li, Ren.,...&Ni, Jie.(2021).Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model.CATENA,200.
MLA	Ma, Wensi,et al."Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model".CATENA 200(2021).