气候变化领域集成服务门户(CCPortal): Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation

CCPortal

DOI	10.5194/tc-15-3523-2021
	Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation
	Bohleber P.; Roman M.; Sala M.; Delmonte B.; Stenni B.; Barbante C.
发表日期	2021
ISSN	19940416
起始页码	3523
结束页码	3538
卷号	15 期号:7
英文摘要	Due to its micrometer-scale resolution and inherently micro-destructive nature, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is particularly suited to exploring the thin and closely spaced layers in the oldest sections of polar ice cores. Recent adaptions to the LA-ICP-MS instrumentation mean we have faster washout times allowing state-of-the-art 2-D imaging of an ice core. This new method has great potential especially when applied to the localization of impurities on the ice sample, something that is crucial, to avoiding misinterpretation of the ultra-fine-resolution signals. Here we present the first results of the application of LA-ICP-MS elemental imaging to the analysis of selected glacial and interglacial samples from the Talos Dome and EPICA Dome C ice cores from central Antarctica. The localization of impurities from both marine and terrestrial sources is discussed, with special emphasis on observing a connection with the network of grain boundaries and differences between different climatic periods. Scale-dependent image analysis shows that the spatial significance of a single line profile along the main core axis increases systematically as the imprint of the grain boundaries weakens. It is demonstrated how instrumental settings can be adapted to suit the purpose of the analysis, i.e., by either employing LA-ICP-MS to study the interplay between impurities and the ice microstructure or to investigate the extremely thin climate proxy signals in deep polar ice. © Copyright:
英文关键词	ablation; climate signal; climate variation; data interpretation; glacial-interglacial cycle; ice core; image analysis; imaging method; polar region; proxy climate record; two-dimensional modeling; Antarctica; Dome Concordia; East Antarctica; Talos Dome
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202282
作者单位	Department of Environmental Sciences, Informatics and Statistics, Ca'Foscari University of Venice, Venice, Italy; Department of Analytical Chemistry, National Institute of Chemistry, Ljubljana, Slovenia; Department of Earth and Environmental Sciences, Università Degli Studi di Milano-Bicocca, Milan, Italy; Institute of Polar Sciences, CNR, Venice, Italy
推荐引用方式 GB/T 7714	Bohleber P.,Roman M.,Sala M.,et al. Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation[J],2021,15(7).
APA	Bohleber P.,Roman M.,Sala M.,Delmonte B.,Stenni B.,&Barbante C..(2021).Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation.Cryosphere,15(7).
MLA	Bohleber P.,et al."Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation".Cryosphere 15.7(2021).