DOI: 10.1029/2018GB005980
论文题名: Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases
作者: Zhang H. ; Gallego-Sala A.V. ; Amesbury M.J. ; Charman D.J. ; Piilo S.R. ; Väliranta M.M.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期: 10 语种: 英语
英文关键词: 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
学科: carbon accumulation
; climate change
; peat decay modeling
; permafrost peatlands
中文摘要: 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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160183
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Zhang H.,Gallego-Sala A.V.,Amesbury M.J.,et al. Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases[J]. Global Biogeochemical Cycles,2018-01-01,32(10)