气候变化领域集成服务门户(CCPortal): Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases

CCPortal

DOI	10.1029/2018GB005980
	Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases
	Zhang H.; Gallego-Sala A.V.; Amesbury M.J.; Charman D.J.; Piilo S.R.; Väliranta M.M.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1605
结束页码	1620
卷号	32 期号:10
英文摘要	Northern peatlands have accumulated large carbon (C) stocks since the last deglaciation and during past millennia they have acted as important atmospheric C sinks. However, it is still poorly understood how northern peatlands in general and Arctic permafrost peatlands in particular will respond to future climate change. In this study, we present C accumulation reconstructions derived from 14 peat cores from four permafrost peatlands in northeast European Russia and Finnish Lapland. The main focus is on warm climate phases. We used regression analyses to test the importance of different environmental variables such as summer temperature, hydrology, and vegetation as drivers for nonautogenic C accumulation. We used modeling approaches to simulate potential decomposition patterns. The data show that our study sites have been persistent mid- to late-Holocene C sinks with an average accumulation rate of 10.80–32.40 g C m−2 year−1. The warmer climate phase during the Holocene Thermal Maximum stimulated faster apparent C accumulation rates while the Medieval Climate Anomaly did not. Moreover, during the Little Ice Age, apparent C accumulation rates were controlled more by other factors than by cold climate per se. Although we could not identify any significant environmental factor that drove C accumulation, our data show that recent warming has increased C accumulation in some permafrost peatland sites. However, the synchronous slight decrease of C accumulation in other sites may be an alternative response of these peatlands to warming in the future. This would lead to a decrease in the C sequestration ability of permafrost peatlands overall. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	carbon accumulation; climate change; peat decay modeling; permafrost peatlands
语种	英语
scopus关键词	carbon; carbon sink; climate change; Hypsithermal; last deglaciation; Little Ice Age; Medieval Warm Period; modeling; peat; peatland; permafrost; warming; Arctic; Finland; Lappi [Finland]; Russian Federation
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129779
作者单位	ECRU, Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland; Helsinki Institute of Sustainability Science (HELSUS), Helsinki, Finland; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Zhang H.,Gallego-Sala A.V.,Amesbury M.J.,et al. Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases[J],2018,32(10).
APA	Zhang H.,Gallego-Sala A.V.,Amesbury M.J.,Charman D.J.,Piilo S.R.,&Väliranta M.M..(2018).Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases.Global Biogeochemical Cycles,32(10).
MLA	Zhang H.,et al."Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases".Global Biogeochemical Cycles 32.10(2018).