DOI: 10.5194/cp-13-395-2017
Scopus记录号: 2-s2.0-85018502148
论文题名: Aromatic acids in a Eurasian Arctic ice core: A 2600-year proxy record of biomass burning
作者: Grieman M.M. ; Aydin M. ; Fritzsche D. ; McConnell J.R. ; Opel T. ; Sigl M. ; Saltzman E.S.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2017
卷: 13, 期: 4 起始页码: 395
结束页码: 410
语种: 英语
Scopus关键词: aerosol
; atmospheric chemistry
; biomass burning
; climate conditions
; climate variation
; forest
; Holocene
; ice core
; ice-rafted debris
; lignin
; Northern Hemisphere
; organic acid
; paleoclimate
; proxy climate record
; temporal record
; volatile organic compound
; wildfire
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Eurasia
; Siberia
英文摘要: Wildfires and their emissions have significant impacts on ecosystems, climate, atmospheric chemistry, and carbon cycling. Well-dated proxy records are needed to study the long-term climatic controls on biomass burning and the associated climate feedbacks. There is a particular lack of information about long-term biomass burning variations in Siberia, the largest forested area in the Northern Hemisphere. In this study we report analyses of aromatic acids (vanillic and para-hydroxybenzoic acids) over the past 2600 years in the Eurasian Arctic Akademii Nauk ice core. These compounds are aerosol-borne, semi-volatile organic compounds derived from lignin combustion. The analyses were made using ion chromatography with electrospray mass spectrometric detection. The levels of these aromatic acids ranged from below the detection limit (0.01 to 0.05 ppb; 1 ppb = 1000 ng L-1) to about 1 ppb, with roughly 30% of the samples above the detection limit. In the preindustrial late Holocene, highly elevated aromatic acid levels are observed during three distinct periods (650-300 BCE, 340-660 CE, and 1460-1660 CE). The timing of the two most recent periods coincides with the episodic pulsing of ice-rafted debris in the North Atlantic known as Bond events and a weakened Asian monsoon, suggesting a link between fires and large-scale climate variability on millennial timescales. Aromatic acid levels also are elevated during the onset of the industrial period from 1780 to 1860 CE, but with a different ratio of vanillic and para-hydroxybenzoic acid than is observed during the preindustrial period. This study provides the first millennial-scale record of aromatic acids. This study clearly demonstrates that coherent aromatic acid signals are recorded in polar ice cores that can be used as proxies for past trends in biomass burning. © Author(s) 2017.
资助项目: NSF, National Science Foundation
; DRI, Desert Research Institute
; DFG, Deutsche Forschungsgemeinschaft
; NSF, National Science Foundation
; UC, University of California
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48928
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Grieman M.M.,Aydin M.,Fritzsche D.,et al. Aromatic acids in a Eurasian Arctic ice core: A 2600-year proxy record of biomass burning[J]. Climate of the Past,2017-01-01,13(4)