The Role of Wave-sea Ice Floe Interactions in Recent Antarctic Sea Ice Change

在卫星观测的时代，南极洲周围的海冰覆盖范围扩大了，而北极海冰则迅速缩小。大多数气候模型预测的是南极海冰的损失，而不是增长，这表明，在南极海冰的自然变化、影响年增长和退缩的过程和相互作用以及温室气体增加和平流层臭氧消耗等大气因素的影响方面，还有很多东西需要了解。 该项目旨在改进海冰的模式模拟，并研究风和波浪强迫对南极周围海冰变化的作用。该项目旨在解释南极气候系统中耦合的大气、海洋和冰动力学的基本相互作用，特别是在海冰边缘附近地区。 夏季海冰覆盖的演变以及大气和海洋近地表热量交换取决于浮冰及其周围开阔水域的几何分布。浮冰的分布对边缘海的海冰状况影响最大，因为边缘海的浮冰分布本身变化很快。该项目将在洛斯阿拉莫斯海冰模型中开发和实施一个海冰浮冰模型，称为CICE 5。这一海冰组成部分将与共同体气候系统模型第二版内的第三代WaveWatch模型相结合。耦合模式将用于研究海冰-波浪的相互作用和南极海冰浮冰模型的作用。 该项目的更广泛影响包括外联、支持女科学家以及改进广泛使用的气候模型中的海冰代码。

Sea-ice coverage surrounding Antarctica has expanded during the era of satellite observations, in contrast to rapidly shrinking Arctic sea ice. Most climate models predict Antarctic sea ice loss, rather than growth, indicating that there is much to learn about Antarctic sea ice in terms of its natural variability, processes and interactions affecting annual growth and retreat, and the impact of atmospheric factors such increasing greenhouse gases and stratospheric ozone depletion. This project is designed to improve model simulations of sea ice and examine the role of wind and wave forcing on changes in sea ice around Antarctica.This project seeks to explain basic interactions of the coupled atmosphere, ocean, and ice dynamics in the Antarctic climate system, especially in the region near the sea ice edge. The summer evolution of sea ice cover and the near surface heat exchange of atmosphere and ocean depend on the geometric distribution of floes and the open water surrounding them. The distribution of floes has the greatest impact on the sea ice state in the marginal seas, where the distribution itself can vary rapidly. This project would develop and implement a model of sea ice floes in the Los Alamos sea ice model, known as CICE5. This sea ice component would be coupled to the third generation WaveWatch model within the Community Climate System Model Version 2. The coupled model would be used to study sea ice-wave interactions and the role of modeling sea ice floes in the Antarctic. The broader impacts of this project include outreach, support of female scientists, and improvement of the sea-ice codes in widely used climate models.