DOI: 10.5194/cp-8-609-2012
Scopus记录号: 2-s2.0-84859124220
论文题名: Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica
作者: Lambert F. ; Bigler M. ; Steffensen J.P. ; Hutterli M. ; Fischer H.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2012
卷: 8, 期: 2 起始页码: 609
结束页码: 623
语种: 英语
Scopus关键词: aerosol
; atmospheric circulation
; atmospheric transport
; calcium
; climate variation
; data set
; dust
; glacial-interglacial cycle
; glacier dynamics
; ice core
; marine atmosphere
; paleoclimate
; paleotemperature
; Southern Hemisphere
; warming
; Antarctica
; Dome Concordia
; East Antarctica
; Southern Ocean
英文摘要: Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly. © Author(s) 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49599
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Lambert F.,Bigler M.,Steffensen J.P.,et al. Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica[J]. Climate of the Past,2012-01-01,8(2)