Collaborative Research: The Arctic Springtime Transition: Dynamics, Impacts, and Future Changes

合作研究：北极春季过渡：动态、影响和未来变化

基本信息

批准号：
1107651
负责人：
Walter Robinson
金额：
$ 26.73万
依托单位：
North Carolina State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-09-01 至 2016-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1107651&HistoricalAwards=false
关键词：
Collaborative Research Arctic Springtime Transition

项目摘要

In the Arctic, the arrival of spring is sudden. The abrupt onset of Arctic spring comes with the development of high pressure over Baffin Bay and the Labrador Sea and shifts in the jet stream and storm tracks. These changes are important for the Arctic climate and environment and have critical influences on Arctic peoples and ecosystems. This project will test the hypothesis that the spring Arctic transition is a dynamical phenomenon, driven by the downward influence of the springtime stratospheric final warming, abrupt changes in the flow over and around Greenland and in atmospheric waves over the North Atlantic, and shifts in the frequency and tracks of storms entering the Arctic. The spring transition effects the surface climate and is likely modified by feedbacks from surface processes. The implications of the dynamical onset of Arctic spring for future changes in the Arctic will be explored, through analyses of atmospheric and Arctic surface data, experiments with a global atmospheric model, and analyses of 20th Century and future climate simulations. This project will develop a dynamical understanding of the Arctic spring transition and its interactions with the Arctic environment. It will use this understanding to evaluate climate models based on their ability to simulate the spring transition, and it will examine model projections of future changes in the Arctic environment resulting from changes in the timing, strength, and structure of the spring transition.

在北极，春天的到来是突然的。北极春天的突然发作是随着巴芬湾和拉布拉多海的高压发展以及喷气流和风暴轨道的变化。这些变化对于北极气候和环境至关重要，对北极人民和生态系统产生了关键的影响。该项目将检验以下假设：春季北极过渡是一种动态现象，这是由于春季平流层最终变暖的向下影响，格陵兰岛和格陵兰岛周围以及北大西洋上的大气波的突然变化，以及进入北极风暴的频率和轨道的变化。春季过渡会影响表面气候，并可能通过表面过程的反馈来改变。通过大气和北极表面数据的分析，具有全球大气模型的实验以及20世纪的分析以及未来的气候模拟，将探索北极弹簧动力学对未来变化的影响对未来变化的影响。该项目将对北极春季过渡及其与北极环境的相互作用产生动态理解。它将利用这种理解来根据其模拟春季过渡的能力来评估气候模型，并将检查由于春季过渡的时机，力量和结构变化而导致的北极环境变化的模型预测。