Tephrochronolgy of the GISP2 Ice Core

GISP2 冰芯的年代学

• 批准号: 9423441
• 负责人: Gregory Zielinski
• 金额: $ 16.33万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-04-15 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423441&HistoricalAwards=false
• 关键词: Tephrochronolgy; GISP2; Ice; Core

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. ***

9423441 Zielienski新罕布什尔州大学的研究人员将通过从格陵兰冰盖项目2（GISP 2）恢复的冰芯中提取灰层来调查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全球热量收支多年。 然而，由于缺乏包含火山活动和气候记录的数据集，火山活动和气候变化的关系尚未得到令人信服的证明。 GISP2冰芯提供了这样的记录。 将对灰烬层进行地球化学分析，以便可以使用各个灰烬层的“指纹”来确定喷发发生的火山中心。 一旦确定了火山灰的来源，并根据火山灰在年代久远的冰芯中的位置确定了时间，那么火山爆发的相对规模就将是已知的。 通过将火山爆发的时间与冰芯中的气候记录进行比较，可以研究大规模火山爆发对气候变化的潜在影响。 ***