The Influence of Sea Ice Motion on Antarctic Sea Ice Expansion

海冰运动对南极海冰扩张的影响

基本信息

批准号：
1643445
负责人：
Ian Eisenman
金额：
$ 39.96万
依托单位：
University of California-San Diego Scripps Inst of Oceanography
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1643445&HistoricalAwards=false
关键词：
Influence Sea Ice Motion Antarctic

项目摘要

Satellite observations show expanding Antarctic sea ice over the last three decades. Increasing Antarctic sea ice seems unexpected when compared to observations of rising global temperatures or shrinking Arctic sea ice. Computer models of global climate also predict Antarctic sea ice to shrink instead of grow. Several hypotheses have been suggested to explain the contradiction between what scientists expect to see based on computer models and physical intuition and the growth that is recorded in observations. This study will examine the hypothesis that sea ice expansion can be explained by sea ice motion, where sea ice moves in such a way as to promote an increase in overall coverage. Researchers will use several different types of computer models, ranging in complexity, to better understand the physical processes of sea ice motion and how the sea ice motion interacts with the larger atmosphere-ocean system. The team will transfer their research to the classroom by hosting a week-long teacher workshop. Teachers will learn how scientists use computer models to test hypotheses and then develop and test tools for use in the classroom. Five middle and high school teachers will participate and become part of the UC San Diego STEM Success Initiative master science teacher network. The project will support a graduate student and a postdoctoral researcher.Sea ice motion has recently emerged as one of the candidates to explain the Antarctic sea ice expansion but a systematic investigation of how sea ice motion influences sea ice concentration has not been presented to date. Researchers will conduct a process-oriented study of the relationship between sea ice motion and Antarctic sea ice extent using a hierarchy of models. The hierarchy will consist of (i) an idealized single-column model of sea ice evolution, (ii) an idealized latitudinally-varying global model of sea ice and climate, (iii) an atmospheric global climate model (GCM) above a slab ocean that includes sea ice motion, (iv) a comprehensive GCM, and (v) model output from the suite of current comprehensive GCMs. The range of model complexities will help researchers better understand the relationship between sea ice motion and sea ice extent by allowing them to identify important processes that are robust across the model hierarchy.

卫星观察结果表明，在过去的三十年中，南极海冰不断扩大。与观察到全球温度上升或北极海冰的观察相比，南极海冰增加似乎出乎意料。全球气候的计算机模型还可以预测南极海冰会收缩而不是生长。已经提出了一些假设，以解释科学家根据计算机模型和物理直觉的期望与观测中记录的增长之间所期望的矛盾。这项研究将研究以下假设：海冰运动可以通过海冰运动来解释，海冰的移动以促进整体覆盖范围的增加。研究人员将使用几种不同类型的计算机模型，范围为复杂，以更好地了解海冰运动的物理过程以及海冰运动如何与较大的大气 - 海洋系统相互作用。团队将通过举办为期一周的教师研讨会将他们的研究转移到教室。教师将学习科学家如何使用计算机模型来检验假设，然后开发和测试在课堂上使用的工具。五位中学和高中教师将参加并成为圣地亚哥分校STEM成功计划大师级教师网络的一部分。该项目将支持研究生和博士后研究人员。SEAICE运动最近成为解释南极海冰扩张的候选人之一，但迄今为止，对海冰运动如何影响海冰浓度的系统调查尚未提出。研究人员将使用模型的层次结构进行面向过程的研究，对海冰运动与南极海冰范围之间的关系。层次结构将包括（i）一种理想化的海冰演化单柱模型，（ii）一个理想化的海冰与气候的全球全球模型，（iii）大气中的全球气候模型（GCM）其中包括海冰运动，（iv）全面的GCM和（V）当前全面GCMS套件的模型输出。模型复杂性的范围将通过允许他们确定在模型层次结构中强大的重要过程来帮助研究人员更好地了解海冰运动和海冰范围之间的关系。