气候变化领域集成服务门户(CCPortal): Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review

CCPortal

DOI	10.3390/atmos12111425
	Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review
	Jin, Huijun; Ma, Qiang
通讯作者	Jin, HJ (通讯作者)，Northeast Forestry Univ, Inst Cold Reg Sci & Engn, Northeast China Observ & Res Stn Permafrost Geoen, Sch Civil Engn,Minist Educ, Harbin 150040, Peoples R China. ; Jin, HJ ; Ma, Q (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou 730000, Peoples R China. ; Ma, Q (通讯作者)，Heilongjiang Univ, Sch Hydraul Engn & Elect Power, Harbin 150040, Peoples R China.
发表日期	2021
EISSN	2073-4433
卷号	12 期号:11
英文摘要	A huge amount of carbon (C) is stored in permafrost regions. Climate warming and permafrost degradation induce gradual and abrupt carbon emissions into both the atmosphere and hydrosphere. In this paper, we review and synthesize recent advances in studies on carbon stocks in permafrost regions, biodegradability of permafrost organic carbon (POC), carbon emissions, and modeling/projecting permafrost carbon feedback to climate warming. The results showed that: (1) A large amount of organic carbon (1460-1600 PgC) is stored in permafrost regions, while there are large uncertainties in the estimation of carbon pools in subsea permafrost and in clathrates in terrestrial permafrost regions and offshore clathrate reservoirs; (2) many studies indicate that carbon pools in Circum-Arctic regions are on the rise despite the increasing release of POC under a warming climate, because of enhancing carbon uptake of boreal and arctic ecosystems; however, some ecosystem model studies indicate otherwise, that the permafrost carbon pool tends to decline as a result of conversion of permafrost regions from atmospheric sink to source under a warming climate; (3) multiple environmental factors affect the decomposability of POC, including ground hydrothermal regimes, carbon/nitrogen (C/N) ratio, organic carbon contents, and microbial communities, among others; and (4) however, results from modeling and projecting studies on the feedbacks of POC to climate warming indicate no conclusive or substantial acceleration of climate warming from POC emission and permafrost degradation over the 21st century. These projections may potentially underestimate the POC feedbacks to climate warming if abrupt POC emissions are not taken into account. We advise that studies on permafrost carbon feedbacks to climate warming should also focus more on the carbon feedbacks from the rapid permafrost degradation, such as thermokarst processes, gas hydrate destabilization, and wildfire-induced permafrost degradation. More attention should be paid to carbon emissions from aquatic systems because of their roles in channeling POC release and their significant methane release potentials.
关键词	SOIL ORGANIC-CARBON LAST GLACIAL MAXIMUM SUBSEA PERMAFROST GAS HYDRATE OLD CARBON RELEASE CO2 TERM VULNERABILITY WETLANDS
英文关键词	climate warming; carbon stocks; permafrost; atmosphere; aquatic systems
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000723761300001
来源期刊	ATMOSPHERE
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/254097
作者单位	[Jin, Huijun] Northeast Forestry Univ, Inst Cold Reg Sci & Engn, Northeast China Observ & Res Stn Permafrost Geoen, Sch Civil Engn,Minist Educ, Harbin 150040, Peoples R China; [Jin, Huijun; Ma, Qiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou 730000, Peoples R China; [Ma, Qiang] Heilongjiang Univ, Sch Hydraul Engn & Elect Power, Harbin 150040, Peoples R China
推荐引用方式 GB/T 7714	Jin, Huijun,Ma, Qiang. Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review[J]. 中国科学院西北生态环境资源研究院,2021,12(11).
APA	Jin, Huijun,&Ma, Qiang.(2021).Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review.ATMOSPHERE,12(11).
MLA	Jin, Huijun,et al."Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review".ATMOSPHERE 12.11(2021).