RAPID: Sediment Delivery and Dispersal from the Copper River, Alaska, Following Record Snowfall: Implications for Future Climate Change?

快速：创纪录降雪后阿拉斯加科珀河的沉积物输送和扩散：对未来气候变化的影响？

• 批准号: 1241185
• 负责人: Steven Kuehl
• 金额: $ 2.7万
• 依托单位: College of William & Mary Virginia Institute of Marine Science
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1241185&HistoricalAwards=false
• 关键词: RAPID; Sediment; Delivery; Dispersal; Copper

Record high snowfall in the Copper River basin, AK, during winter 2011-2012 is expected to result in anomalously high water and sediment discharge in early summer (June-July). To characterize river outflow and sediment dispersal during this time, this RAPID project will survey flow properties, sediment concentrations, and the distribution of fluid muds near the river mouth and on the shallow shelf. In addition, cores will be collected in the Gulf of Alaska and Prince William Sound to explore the potential for developing a paleo record of Copper River discharge, which is expected to vary with climate conditions. This work will take advantage of a historic snowfall season to better understand the effects of climate perturbations on discharge and sedimentation patterns in an ecologically important high-latitude region.

2011 年至 2012 年冬季，阿拉斯加州库珀河流域降雪量创历史新高，预计将导致初夏（6 月至 7 月）异常高的水和泥沙排放量。为了表征这段时间内河流的流量和沉积物扩散，该 RAPID 项目将调查河口附近和浅陆架上的水流特性、沉积物浓度以及流体泥浆的分布。此外，还将在阿拉斯加湾和威廉王子湾收集岩心，以探索开发铜河流量古记录的潜力，预计该记录会随气候条件而变化。这项工作将利用历史性的降雪季节，更好地了解气候扰动对生态重要的高纬度地区排放和沉积模式的影响。