Long-Term, High-Resolution Paleoclimate in the Wrangell Mountain Range in Alaska

阿拉斯加兰格尔山脉的长期高分辨率古气候

• 批准号: 9709095
• 负责人: Gordon Jacoby
• 金额: $ 36.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9709095&HistoricalAwards=false
• 关键词: Long; Term; Resolution; Paleoclimate; Wrangell

Abstract ATM-9709095 Jacoby, Gordon C. Columbia University Title: Long-Term, High Resolution Paleoclimate in the Wrangell Mountain Range in Alaska This award supports a study to develop the high-resolution, multi- proxy paleoclimate potential of the Wrangell Mountain region of Alaska. The region contains proven paleoclimatic resources documenting natural climate variability through much of the late Holocene. The tree-ring and glacial resources make this a promising area where high-resolution, multi-proxy climate histories may be developed. Subfossil spruce preserved in glacial, alluvial and volcanic deposits (much above or near modern tree line) could potentially extend the tree-ring record back through the past three millennia. With both ring-width and density parameters from the trees and sampling dry as well as wet sites, annual and seasonal information will be developed that will be directly comparable to glacial fluctuations. The generation of dendroclimatic data and reconstructions together with high-resolution, tree-ring dating of glacial fluctuations and geomorphic changes will lead to a better characterization of the natural climate variability.

题目：阿拉斯加弗兰格尔山脉的长期、高分辨率古气候该奖项支持一项开发阿拉斯加弗兰格尔山脉地区高分辨率、多代理古气候潜力的研究。该地区包含经过验证的古气候资源，记录了晚全新世大部分时间的自然气候变化。树木年轮和冰川资源使这一地区成为开发高分辨率、多代理气候历史的有希望的地区。保存在冰川、冲积和火山沉积物中的亚化石云杉（远高于或接近现代树木线）可能会将树木年轮记录延长到过去三千年。有了树木的年轮宽度和密度参数以及干地和湿地取样，就可以编制出与冰川波动直接比较的年度和季节资料。树木气候数据的生成和重建以及冰川波动和地貌变化的高分辨率树木年轮定年将导致更好地表征自然气候变率。