Negative sea ice-circulation feedback along Arctic marginal ice zones

理解海冰如何与上面的大气环流相互作用变得越来越重要。提供了资金来研究北极边缘冰带(MIZ)及其周围的负反馈过程，涉及海冰、表面热通量和表面风应力的可变性。在这个负反馈过程中，假设MIZ的海冰异常产生局地风型来对抗初始的海冰异常，从而在周时间尺度上提供对MIZ后退和推进的调节机制。这项工作将量化MIZ局部负反馈过程，并确定其在当代和预测海冰条件下的影响。在观测和模拟环境中进行的为期三年的详细研究将实现以下研究目标：1)确定和绘制MIZ海冰范围异常对表层风应力的响应；2)确定和绘制海冰对由局地海冰异常产生的风应力异常的响应；3)在观测和耦合模拟中评估海冰-风应力负反馈的统计意义；4)通过在耦合模式中打开和关闭反馈来确定反馈的效果。该项目将为一名新的年轻调查员提供研究支助，并支持对一名女研究生和一名本科生进行额外培训。该项目还包括对K-12学生的外展。

It is increasingly important to understand how sea ice interacts with the overlying atmospheric circulation. Funds are proided to investigate a negative feedback process over and around the Arctic marginal ice zone (MIZ) involving variability in sea ice, surface heat flux, and surface wind stress. In this negative feedback process, sea ice anomalies in the MIZ are hypothesized to generate local wind patterns that act to counter the initial sea ice anomalies, providing a regulatory mechanism on the retreat and advance of the MIZ on weekly time scales.This work will quantify the MIZ local negative feedback process and determine its effects under contemporary and projected sea ice conditions. A detailed three-year study in observations and modeling environments will realize the following research objectives: 1) determine and map the response of surface wind stress to sea ice extent anomalies in the MIZ, 2) determine and map the sea ice response to wind stress anomalies generated by local sea ice anomalies, 3) evaluate the statistical significance of the sea ice-wind stress negative feedback in observations and coupled simulations, and 4) determine the effects of the feedback by turning it on and off in a coupled model. This project will provide research support for a new, young investigator, as well as support for the additional training of a female graduate student and an undergraduate student. The project also includes outreach to k-12 students.