Collaborative Research: Full-Holocene Decadal-Scale Isotopic Paleoclimate Record from Speleothems, Oregon Coast Range

合作研究：来自俄勒冈海岸山脉洞穴的全全新世十年尺度同位素古气候记录

• 批准号: 0502242
• 负责人: Richard Edwards
• 金额: $ 10.54万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-15 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0502242&HistoricalAwards=false
• 关键词: Collaborative; Research; Full; Holocene; Decadal

This project will use speleothems from southwestern Oregon, a region that is heavily influenced by maritime air masses emanating from the Pacific Ocean, to develop new and innovative high-resolution records in western North America. Available well-dated climate records from the Pacific Northwest show interannual-to-decadal variability but span only the last ~500 years and are thus unable to address whether high-frequency climate variability is a persistent feature over longer time intervals. The researchers will fill this science gap by obtain a decadal-scale records from speleothems. Their main scientific objective is to document how coupled atmosphere-ocean-terrestrial interactions have affected North America during the Holocene. The project will also explore linkages between Holocene climate variability in the latitude band of the northern hemisphere Westerlies where they enter North America, and other regions such as the North Atlantic, which appears to respond to quasi-periodic forcing by solar irradiance, and the equatorial Pacific, in which the frequency and intensity of El Nino-Southern Oscillation (ENSO) events are hypothesized to have changed in complex ways in response to gradual changes in Earth's orbit through the Holocene.The science resulting from this project will aid in the development of high-resolution (decadal) records of regional climate in the Pacific Northwest from a near-coastal site. These records are expected to improve understanding of past climate variability, and enhance projections of future climate change. Undergraduate and graduate students and postdoctoral scholars will be involved in this study thereby providing an excellent opportunity to participate and contribute to research in an emerging field of inquiry. The results of this research will be translated into educational products for visitors to Oregon Caves National Monument.

该项目将利用来自俄勒冈州西南部的洞穴沉积物，该地区受到来自太平洋的海洋气团的严重影响，以开发北美西部新的和创新的高分辨率记录。太平洋西北部现有的年代较长的气候记录显示出年际至年代际的变化，但仅跨越过去500年，因此无法解决高频气候变率是否是一个长期持续的特征。研究人员将通过从洞穴沉积物中获得十年尺度的记录来填补这一科学空白。他们的主要科学目标是记录大气-海洋-陆地相互作用在全新世期间如何影响北美。该项目还将探索进入北美的北方半球西风带纬度带全新世气候变异与北大西洋等其他地区之间的联系，北大西洋似乎对太阳辐射的准周期强迫做出了反应。和赤道太平洋，其中厄尔尼诺-南方涛动（ENSO）的频率和强度假设事件以复杂的方式发生变化，以响应全新世地球轨道的逐渐变化。该项目产生的科学将有助于开发高分辨率（十年）太平洋西北部近海岸地区的区域气候记录。这些记录有望提高对过去气候变率的认识，并加强对未来气候变化的预测。本科生和研究生以及博士后学者将参与这项研究，从而提供了一个很好的机会，参与并为新兴的调查领域的研究做出贡献。这项研究的结果将转化为教育产品，供俄勒冈州洞穴国家纪念碑的游客使用。