Assessment of 1979-89 Inter-annual Trends in Arctic Basin Ice Draft as Measured by U.S. Nuclear Submarines

对 1979-89 年美国核潜艇测量的北极盆地冰吃水年际趋势的评估

• 批准号: 9014884
• 负责人: Alfred McLaren
• 金额: $ 4.93万
• 依托单位: Arctic Analysts Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-10-01 至 1992-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014884&HistoricalAwards=false
• 关键词: Assessment; 1979; 89; Inter; annual

The quasi-permanent sea ice cover of the Arctic Ocean is a central component of the northern high latitude climate system, and secular changes in the concentration and thickness of the sea ice can be important proxy indicators of wide-spread arctic climate variations. While interannual differences in ice concentration and extent are relatively easily documented from microwave satellite imagery, variations in thickness require the analysis of direct in- situ observations. This project is an effort to analyze selected sea ice draft profiles obtained with an upward looking sonar by U.S. submarines while crossing the Arctic Ocean. These data have been obtained routinely since 1975, but have not yet been subjected to a rigorous examination, nor have they been related to other in situ and remotely sensed environmental data. The proposed statistical techniques are expected to be sufficiently precise to reveal interannual variations in the arctic ice thickness on the decadal time scale, which may be an early indicator of hemispheric climate change.

北冰洋的准永久性海冰覆盖是一个中心问题， 北方高纬度气候系统的组成部分， 海冰浓度和厚度的变化 广泛分布的北极气候的重要代用指标 变化. 虽然冰浓度的年际差异和 从微波卫星上比较容易记录到 图像，厚度的变化需要直接分析， 现场观察 这个项目是一个努力分析选定的 海冰吃水剖面图是用上视声纳获得的， 美国潜艇在穿越北冰洋时。 这些数据 自1975年以来一直定期获得，但尚未受到 一个严格的检查，也没有与其他有关， 现场和遥感环境数据。 拟议 预计统计技术将足够精确， 揭示了北极冰层厚度的年际变化， 年代际时间尺度，这可能是一个早期的指标，半球 气候变化