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

该奖项支持一项开发阿拉斯加朗格尔山脉高分辨率高分辨率古气候潜力的研究。该地区拥有已探明的古气候资源，记录了全新世晚期大部分时间的自然气候变异性。树木年轮和冰川资源使这一地区成为一个有希望发展高分辨率、多代理气候历史的地区。保存在冰川、冲积和火山沉积(远高于或接近现代树线)中的亚化石云杉可能会将树木年轮的记录延长到过去3000年。利用树木的年轮宽度和密度参数以及对干燥和潮湿地点的采样，将开发出可直接与冰川波动相比较的年度和季节性信息。树枝气候数据的产生和重建，以及对冰川波动和地貌变化的高分辨率树轮测年，将有助于更好地描述自然气候的变异性。

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.