P2C2: Flickering Climate: Assessment of the Non-Stationary Environment in the Great Lakes Area, 14 ka to 8 ka BP- A Time of Rising Human Population and Mega-Fauna Extinction

P2C2：闪烁的气候：大湖区非平稳环境评估，距今 14 ka 至 8 ka - 人口增长和巨型动物灭绝的时期

• 批准号: 1003483
• 负责人: Irina Panyushkina
• 金额: $ 59.74万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003483&HistoricalAwards=false
• 关键词: P2C2; Flickering; Climate; Assessment; Non

This research project tests the hypothesis that past abrupt changes like the Younger Dryas cold event, the Older Dryas cold period, Intra-Allerød cold period, and the 8.2 ka cooling event, as well as future abrupt changes related to human alteration of the atmosphere, may be immediately preceded by "variance amplification" that drives the system to tipping points that usher in the new steady-state climate conditions. The researchers aim to test for such variance amplification during deglaciation using tree-rings from the Great Lakes region as high-resolution climate proxies.The Great Lakes region is targeted by the researchers for investigating variance amplification because it is close enough to the North Atlantic to be strongly teleconnected to climate events spawned there and events in the Great Lake region itself may have triggered some of these hemisphere-wide climate excursions.The primary broader impacts involve supporting undergraduate students in the project and creating a summer short course in dendroclimatology and related sciences.

该研究项目测试了这样的假设：过去的突然变化，如新仙女木寒冷事件、旧仙女木寒冷期、阿勒罗德内寒冷期和8.2 ka变冷事件，以及未来与人类对大气的改变有关的突然变化，可能会立即发生“方差放大”，从而驱动系统达到临界点，从而迎来新的稳态气候条件。研究人员的目标是使用五大湖地区的树木年轮作为高分辨率气候代理来测试冰消期间的这种方差放大。研究人员将五大湖地区作为研究方差放大的目标，因为它距离北大西洋足够近，可以与那里产生的气候事件强烈遥相关，而五大湖地区本身的事件可能引发了其中一些半球范围的气候偏移。 更广泛的影响包括支持该项目的本科生以及开设树木气候学和相关科学的夏季短期课程。

项目成果

Deglacial Hydroclimate of Midcontinental North America

北美洲中部大陆冰消期水文气候

• DOI: 10.1016/j.yqres.2015.01.001
• 发表时间: 2015
• 期刊: Quaternary Research
• 影响因子: 2.3
• 作者: Voelker, Steven L.;Stambaugh, Michael C.;Guyette, Richard P.;Feng, Xiahong;Grimley, David A.;Leavitt, Steven W.;Panyushkina, Irina;Grimm, Eric C.;Marsicek, Jeremiah P.;Shuman, Bryan
• 通讯作者: Shuman, Bryan

Tree-Ring Investigation of Holocene Flood-Deposited Wood From the Oneida Lake Watershed, New York State

• DOI: 10.3959/1536-1098-71.2.83
• 发表时间: 2015-09
• 作者: I. Panyushkina;S. Leavitt;E. Domack;A. Wiedenhoeft