Tephrochronolgy of the GISP2 Ice Core

新罕布夏大学的研究人员将通过从格陵兰冰盖计划2 （GISP2）回收的冰芯中提取火山灰层来研究气候和火山活动之间的关系。大气中大量的火山物质可能会影响多年的全球热收支。然而，由于缺乏包含火山作用和气候记录的数据集，火山作用和气候变化的关系还没有得到令人信服的证明。GISP2冰芯提供了这样的记录。火山灰层将被地球化学分析，这样单个火山灰层的“指纹”就可以用来确定火山爆发的中心。一旦确定了火山灰的来源，并根据火山灰在年代确定的冰芯内的位置确定了时间，那么就可以知道火山喷发的相对强度。通过将火山喷发的时间与冰芯中的气候记录进行比较，可以检验大型火山喷发对气候变化的潜在影响。＊＊＊

9423441 Zielienski Researchers at the University of New Hampshire will investigate the relationship between climate and volcanism by extracting ash layers from ice cores recovered by the Greenland Ice Sheet Project 2 (GISP2). Large volumes of volcanic material in the atmosphere may affect the global heat budget for years. The relationship of volcanism and climate change, however, has not been convincingly demonstrated due to the lack of a data set that contains records of both volcanism and climate. GISP2 ice cores provide such a record. The ash layers will by analyzed geochemically so that the "fingerprint" of individual ash layers may be used to determine the volcanic center where the eruption occurred. Once the source of the ash is determined and the timing is established by the location of the ash within the well-dated ice core, then the relative magnitude of the eruption will be known. By comparing the timing of the volcanic eruptions to the climate record in the ice core, the potential impact of large eruptions on climate change may be examined. ***