Collaborative Research: P2C2--Ice Core Paleoclimate Records from Combatant Col, British Columbia, Canada

为从加拿大不列颠哥伦比亚省西南部的Waddington山战斗上校获得新的冰芯积累记录提供了资金。Combatant Col的位置比北美西海岸其他现有的冰芯地点要靠南得多，降水的变化往往与阿拉斯加和育空地区的不一致。战斗Col位于3000米高的地方，包含200多米的冰。年净积雪量~2.5米/年，年平均气温-5℃。从现场65米高的岩心中可以看出，地球化学、尘埃和黑碳中保存着清晰的年分层。基岩附近的冰的年龄估计在200年到1000年之间。预计将在该地点恢复每年解析的层厚记录，以便记录过去200-1000年的积雪。Combatant Col记录与北美西部边缘其他现有降水变率记录相结合，将用于开发该地区过去200-1000年降水变率的更新和改进重建，以解决有关太平洋年代际变率的基本问题。更广泛的影响包括支持早期职业女性研究者和加强与加拿大机构研究人员的国际合作。该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。

Funding is provided to obtain new ice core accumulation records from Combatant Col, Mt. Waddington, in southwestern British Columbia (BC), Canada. Combatant Col is located significantly farther south than other existing ice core sites along the west coast of North America and variations in precipitation tend to be out of phase with those in Alaska and the Yukon. Combatant Col sits at 3000 meters and contains more than 200 meters of ice. The net annual snow accumulation is ~2.5 meters/year and the mean annual temperature -5°C. A 65-meter core from the site shows that clear annual layering is preserved in the geochemistry and in dust and black carbon. The age of the ice near bedrock is estimated to be between 200 years and 1000 years old. It is anticipated that an annually-resolved record of layer thickness will be recovered at the site to allow for a record of snow accumulation covering the last 200-1000 years.The Combatant Col record, in combination with other existing records of precipitation variability along the western margin of North America, will be used to develop an updated and improved reconstruction of precipitation variability in this region over the last 200-1000 years to address fundamental questions about Pacific decadal scale variability.The broader impacts involve supporting an early career female investigator and strengthening international collaborations with researchers from institutions in Canada.This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).