气候变化领域集成服务门户(CCPortal): Warming could shift steppes to carbon sinks and meadows to carbon sources in permafrost regions: Evidence from the improved IBIS model

CCPortal

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 (通讯作者)，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 (通讯作者)，Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Wu, TH (通讯作者)，Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China.
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
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
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000620777400030
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254279
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]. 中国科学院西北生态环境资源研究院,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).