A New Method for Constraining Paleoclimate Parameters using Space Geodetic Determinations of Ongoing Viscoelastic Adjustment due to Ancient Glacial Loads

一种利用空间大地测量约束古气候参数的新方法，该方法利用古代冰川载荷引起的持续粘弹性调整

• 批准号: 0125517
• 负责人: James Davis
• 金额: $ 26.19万
• 依托单位: Smithsonian Institution Astrophysical Observatory
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0125517&HistoricalAwards=false
• 关键词: New; Method; Constraining; Paleoclimate; Parameters

Reconstructing and modeling climate variations over the last 30,000 years or so is one of the most important goals of global climate change research. Only by determining how the global climate varied during this period can we begin to understand the factors that controlled climate change in the past, an understanding that is crucial if we are to interpret the climate changes of today. For example, such an understanding is crucial if we are to separate "natural" climate variations from anthropogenically induced ones, and to predict future climate change. In this project, the investigators will use Global Positioning System (GPS) data from regions previously covered by glaciers to measure the present-day crustal motions associated with postglacial rebound. Using these data, a refined model for the history of the ice cover will be determined. This refined history can be used to estimate parameters that govern the evolution of the climate.

重建和模拟过去3万年左右的气候变化是全球气候变化研究的最重要目标之一。只有通过确定全球气候在这一时期的变化，我们才能开始了解过去控制气候变化的因素，这一理解对于我们解释今天的气候变化至关重要。例如，如果我们要区分“自然”气候变化和人类造成的气候变化，并预测未来的气候变化，这样的理解是至关重要的。在这个项目中，研究人员将使用全球定位系统(GPS)来自以前被冰川覆盖的地区的数据来测量与冰川后反弹相关的现今地壳运动。利用这些数据，将确定一个改进的冰盖历史模型。这段精炼的历史可以用来估计控制气候演变的参数。