DOI: 10.1016/j.quascirev.2013.10.030
Scopus记录号: 2-s2.0-84890030077
论文题名: Late Holocene ecohydrological and carbon dynamics of a UK raised bog: Impact of human activity and climate change
作者: Turner T.E. ; Swindles G.T. ; Roucoux K.H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 84 起始页码: 65
结束页码: 85
语种: 英语
英文关键词: Climatic change
; Holocene
; Human influence
; Multiproxy
; Peatland
; UK
Scopus关键词: Climatic changes
; Holocenes
; Human influences
; Multi proxies
; Peatland
; UK
; Air pollution
; Atmospheric movements
; Charcoal
; Geochemistry
; Meteorological problems
; Plants (botany)
; Wetlands
; Climate change
; anthropogenic effect
; atmospheric deposition
; atmospheric forcing
; carbon cycle
; climate variation
; ecohydrology
; fossil record
; Holocene
; human activity
; humification
; hydrological response
; paleoclimate
; paleoecology
; raised bog
; sunspot
; water table
; United Kingdom
英文摘要: Understanding the ecohydrological responses of peatlands to climate change is particularly challenging over the late Holocene owing to the confounding influence of anthropogenic activity. To address this, a core spanning the last ~2400 years from a raised bog in northern England was analysed using a comprehensive suite of proxy methods in an attempt to elucidate the drivers of change. A testate amoebae-based transfer function was used to quantitatively reconstruct changes in water table depth, supported by humification analysis and a plant macrofossil-derived hydroclimatic index. Pollen and plant macrofossil data were used to examine regional and local vegetation change, and human impacts were inferred from charcoal and geochemistry. Chronological control was achieved through a Bayesian age-depth model based on AMS radiocarbon dates and spheroidal carbonaceous particles, from which peat and carbon accumulation rates were calculated. Phases of both increased and decreased bog surface wetness (inferred effective precipitation) are present, with dry phases at c. AD 320-830, AD 920-1190 and AD 1850-present, and a marked period of increased effective precipitation at c. AD 1460-1850. Coherence with other records from across Northern Europe suggests that these episodes are primarily driven by allogenic climatic change. Periods of high bog surface wetness correspond to the Wolf, Spörer and Maunder sunspot activity minima, suggesting solar forcing was a significant driver of climate change over the last ~1000 years. Following the intensification of agriculture and industry over the last two centuries, the combined climatic and anthropogenic forcing effects become increasingly difficult to separate due to increases in atmospheric deposition of anthropogenically derived pollutants, fertilising compounds, and additions of wind-blown soil dust. We illustrate the need for multiproxy approaches based on high-resolution palaeoecology and geochemistry to examine the recent trajectories of peatlands.© 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60403
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography, University of Leeds, Leeds LS2 9JT, United Kingdom
Recommended Citation:
Turner T.E.,Swindles G.T.,Roucoux K.H.. Late Holocene ecohydrological and carbon dynamics of a UK raised bog: Impact of human activity and climate change[J]. Quaternary Science Reviews,2014-01-01,84