Variability of 10Be and δ18O in snow pits from Greenland and a surface traverse from Antarctica
Variability of 10Be and δ18O in snow pits from Greenland and a surface traverse from Antarctica
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DOI：
10.1016/j.nimb.2012.05.041
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发表时间：
2013-01-01
影响因子：
1.3
通讯作者：
Murad, A.
中科院分区：
文献类型：
--
作者：
Berggren, A. -M.;Aldahan, A.;Murad, A.
为了研究Be-10在冰川冰中的时间变化，我们在格陵兰岛的NEEM（北格陵兰Eemian冰钻探）钻探现场采集了160厘米深的雪。样本时间跨度为2006年至2009年的三年。与此同时，Be-10在冰川冰的空间变异性进行了探讨，通过收集在南极洲的上部类似于5厘米的表面雪在瑞典-日本的遍历从Svea到昭和站在2007-2008年的南夏季的一部分。格陵兰岛1 Be雪的结果表明，变量浓度，显然不能清楚地反映季节性变化所示的三角洲O-18数据。Be-10浓度的变化很可能也反映了气溶胶负载和沉积路径的影响，可能与沉积后processs.The南极横贯数据暴露Be-10和三角洲O-18之间的负相关性，而有较弱的，但仍然显着的相关性，海拔和距离海岸（约70纬度的距离）。这些关系表明，地理因素，主要是接近海岸，可能会强烈影响1被雪中的浓度在毛德皇后地，南极洲。(C)2012 Elsevier B. V.保留所有权利。
To examine temporal variability of Be-10 in glacial ice, we sampled snow to a depth of 160 cm at the NEEM (North Greenland Eemian Ice Drilling) drilling site in Greenland. The samples span three years between the summers of 2006 and 2009. At the same time, spatial variability of Be-10 in glacial ice was explored through collection of the upper similar to 5 cm of surface snow in Antarctica during part of the Swedish-Japanese traverse from Svea to Syowa station during the austral summer in 2007-2008. The results of the Greenlandic 1 Be snow suggested variable concentrations that apparently do not clearly reflect the seasonal change as indicated by the delta O-18 data. The Be-10 concentration variability most likely reflects also effects of aerosol loading and deposition pathways, possibly in combination with post-depositional processes.The Antarctic traverse data expose a negative correlation between Be-10 and delta O-18, while there are weaker but still significant correlations to altitude and distance to the coast (approximated by the distance to the 70th latitude). These relationships indicate that geographical factors, mainly the proximity to the coast, may strongly affect 1 Be concentrations in snow in Queen Maud Land, Antarctica. (C) 2012 Elsevier B.V. All rights reserved.