Collaborative Research: The Impacts of Arctic Storms on Landfast Ice Variations

Eicken 0712673大学。基金用于研究30多年来的陆地冰记录、气旋轨迹和强度、沿海大风条件的频率和时间、近岸浮冰漂移和两个具有代表性的北极沿海地区的沿海天气观测。该项目的重点是研究推动陆地冰对风暴产生的沿海环境变化作出反应的相关过程。为了了解驱动陆冰动力学和热力学过程的物理，现有的沿海观测和数值模拟将包括在详细的过程分析中。主要研究人员将整合他们的各种数据集和知识，以解决以下问题：(1)风暴气候的变化如何影响沿海的气温和风况？(2)陆地冰（包括其稳定性和接地模式）如何响应沿海风和风暴活动以及近岸冰运动和沿海洋流？(3)决定快冰范围和持续时间长期变化的因素之间有什么物理联系？(4)在风暴活动增加的情况下，陆地冰可能受到什么影响？陆地冰只占北冰洋总冰层的一小部分，但它对当地居民的生活方式至关重要。它保护海滩在长时间内免受侵蚀；它为乘坐雪地摩托和雪橇在村庄之间旅行提供了一个表面；它是许多生存狩猎（海豹、海象、鲸鱼）发生的地方。了解它是如何变化的以及将如何变化对日常安全以及战略管理都很重要。

Eicken 0712673Univ. of Alaska - FairbanksFunds are provided to examine over 30 years of landfast ice records,cyclone tracks and intensity along with frequency and timing of coastal high windconditions, nearshore pack ice drift, and coastal weather observations in tworepresentative arctic coastal regions. The focus of the project is to examine the relevant processes driving landfast ice responses to storm-produced coastal environmental change. To understand the physics that drive the dynamic and thermodynamic processes of landfast ice, existing coastal observations and numerical modeling will be included in a detailed process analysis.The principal investigators will merge their various data sets and knowledge to address the following questions: (1) How do changes in the storm climate affect the coastal air temperatures and wind conditions? (2) How does landfast ice, including its stability and grounding patterns, respond to coastal winds and storm activity as well as nearshore ice motion and coastal currents? (3) What are the physical connections among those factors determining long-term variations of fast ice extent and duration? (4) What impacts on landfast ice are likely under a scenario of increased storm activity?Landfast ice is a small fraction of the total ice cover of the Arctic Ocean, yet it is of extreme importance to the indigenous polpulation's way of life. It protects the beach from erosion during extended periods of time; it provides a surface over which to travel between villages by snowmobile and sled; it is the surface from which much subsistence hunting (seal, walrus, whale) takes place. Understanding how it is and will change has importance for day-to-day safety, as well as strategic management.