The Greenland Ice Core Chronology 2005, 15-42 ka.: Part 1:: constructing the time scale
The Greenland Ice Core Chronology 2005, 15-42 ka.: Part 1:: constructing the time scale
复制标题
DOI：
10.1016/j.quascirev.2006.08.002
复制
发表时间：
2006-12-01
影响因子：
4
通讯作者：
Clausen, Henrik B.
中科院分区：
文献类型：
--
作者：
Andersen, Katrine K.;Svensson, Anders;Clausen, Henrik B.
2005年格陵兰冰芯年表，GICC05，被追溯到42 ka b2k（公元2000年之前），即到格陵兰体育场II结束。该年表基于使用北格陵兰冰芯项目 (NGRIP) 提供的全面高分辨率测量数据对年度层进行的独立多参数计数。这些是视觉地层学、固体冰电导率、电解融水电导率以及 Na+、Ca2+、SO42-、NO3-、NH4+ 浓度的测量。时间尺度的不确定性估计是通过识别“不确定”年度层获得的，按 0.5 +/- 0.5 年计算。不确定年层的总和，即所提出的年代学的所谓最大计数误差，范围从温暖的间期的 4% 到寒冷的间期的 7%。场内和场间的年累积率平均分别为现值的三分之一和一半，而格陵兰场间2、3和8的起始时间根据20年平均6180个值，在GICC05中确定为23,340年、27,780年和38,220年。 (c) 2006 Elsevier Ltd. 保留所有权利。
The Greenland Ice Core Chronology 2005, GICC05, is extended back to 42 ka b2k (before 2000 AD), i.e. to the end of Greenland Stadial II. The chronology is based on independent multi-parameter counting of annual layers using comprehensive high-resolution measurements available from the North Greenland Ice Core Project, NGRIP. These are measurements of visual stratigraphy, conductivity of the solid ice, electrolytical melt water conductivity and the concentration of Na+, Ca2+, SO42-, NO3-, NH4+. An uncertainty estimate of the time scale is obtained from identification of 'uncertain' annual layers, which are counted as 0.5 +/- 0.5 years. The sum of the uncertain annual layers, the so-called maximum counting error of the presented chronology ranges from 4% in the warm interstadial periods to 7% in the cold stadials. The annual accumulation rates of the stadials and interstadials are on average one-third and half of the present day values, respectively, and the onset of the Greenland Interstadials 2, 3, and 8, based on 20 year averaged 6180 values, are determined as 23,340, 27,780, and 38,220yr b2k in GICC05. (c) 2006 Elsevier Ltd. All rights reserved.