DOI: 10.5194/tc-11-1297-2017
Scopus记录号: 2-s2.0-85020031864
论文题名: Calibrated cryo-cell UV-LA-ICPMS elemental concentrations from the NGRIP ice core reveal abrupt, sub-Annual variability in dust across the GI-21.2 interstadial period
作者: Lunga D ; D ; , Müller W ; , Olander Rasmussen S ; , Svensson A ; , Vallelonga P
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 3 起始页码: 1297
结束页码: 1309
语种: 英语
英文关键词: annual variation
; calibration
; chemical element
; concentration (composition)
; dust
; ice core
; interstadial
; mass spectrometry
; NorthGRIP
; sea salt
; spatial resolution
; ultraviolet radiation
; warming
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Several abrupt shifts from periods of extreme cold (Greenland stadials, GS) to relatively warmer conditions (Greenland interstadials, GI) called Dansgaard-Oeschger events are recorded in the Greenland ice cores. Using cryo-cell UV-laser-Ablation inductively coupled-plasma mass spectrometry (UV-LA-ICPMS), we analysed a 2.85ĝ€m NGRIP ice core section (2691.50-2688.65ĝ€m depth, age interval 84.86-85.09ĝ€kaĝ€b2k, thus covering ĝ1/4 ĝ€230 years) across the transitions of GI-21.2, a short-lived interstadial prior to interstadial GI-21.1. GI-21.2 is a ĝ1/4 ĝ€100-year long period with d 18O values 3-4ĝ€‰ higher than the following ĝ1/4 ĝ€200 years of stadial conditions (GS-21.2), which precede the major GI-21.1 warming. We report concentrations of major elements indicative of dust and/or sea salt (Na, Fe, Al, Ca, Mg) at a spatial resolution of ĝ1/4 ĝ€200ĝ€μm, while maintaining detection limits in the low-ppb range, thereby achieving sub-Annual time resolution even in deep NGRIP ice. We present an improved external calibration and quantification procedure using a set of five ice standards made from aqueous (international) standard solutions. Our results show that element concentrations decrease drastically (more than 10-fold) at the warming onset of GI-21.2 at the scale of a single year, followed by relatively low concentrations characterizing the interstadial part before gradually reaching again typical stadial values. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75549
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Royal Holloway University of London, Egham, United Kingdom; Alfred Wegener Instiutute for Polar and Marine Research, Bremerhaven, Germany; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Recommended Citation:
Lunga D,D,, Müller W,et al. Calibrated cryo-cell UV-LA-ICPMS elemental concentrations from the NGRIP ice core reveal abrupt, sub-Annual variability in dust across the GI-21.2 interstadial period[J]. Cryosphere,2017-01-01,11(3)