A Study of Frontal-Scale Air-Sea Interaction along the Gulf Stream Extension Using a High-Resolution Coupled Regional Climate Model

利用高分辨率耦合区域气候模型研究沿墨西哥湾流延伸的锋面海气相互作用

• 批准号: 1067937
• 负责人: Ping Chang
• 金额: $ 53.86万
• 依托单位: Texas A&M Research Foundation
• 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: 2011-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1067937&HistoricalAwards=false
• 关键词: Study; Frontal; Scale; Air; Sea

The Gulf Stream Extension (GSE) region has been identified as a key location in the extratropics where sea surface temperature variability may induce considerable atmospheric variability, raising the intriguing possibility of significant midlatitude air-sea interaction. The Principal Investigators (PIs) plan to carry out very high-resolution coupled regional climate model simulations in the Atlantic domain, using horizontal grid resolution as fine as 3 km in nested sub-regions over the GSE. At these resolutions, important aspects of atmospheric convection and oceanic eddies are explicitly resolved and frontal-scale ocean-atmosphere interaction along the Gulf Stream can be directly examined. The PIs will examine the following scientific questions: (i) To what extent can climate model biases in the GSE region affect simulations and predictions of regional climate variability in the North Atlantic? (ii) Can the strong thermal front of the Gulf Stream affect the Atlantic storm tracks? If so, how does synoptic-scale atmospheric variability interact with the ocean and what are the feedback mechanisms between the atmosphere and ocean at small spatial scales? (iii) Can shifts in the Gulf Stream in response to changes in the Atlantic Meridional Overturning Circulation (AMOC) changes produce a significant atmospheric response? If so, what are the dynamical processes responsible for such a response? The broader impacts of this activity are substantial: the research will enhance our understanding of the uncertainties in projecting the impact of global climate change on the Atlantic region, which has important social and economic consequences for countries in the region.

海湾流延伸（GSE）区域已被确定为室外的关键位置，海面温度可变性可能会引起大气变异性，从而增加了显着的中纬度空气相互作用的有趣可能性。首席研究人员（PIS）计划在大西洋域中进行非常高分辨率的区域气候模型模拟，并在GSE上嵌套的子区域中使用水平网格分辨率进行水平分辨率罚款。在这些决议中，可以直接检查大气对流和海洋涡流的重要方面，并可以直接检查沿着海湾流的额叶尺度海洋 - 大气相互作用。 PI将检查以下科学问题：（i）GSE地区的气候模型在多大程度上会影响北大西洋地区气候变化的模拟和预测？ （ii）墨西哥湾流的强热锋可以影响大西洋风暴轨道吗？如果是这样，天气尺度的大气变异性如何与海洋相互作用？在小空间尺度上，大气和海洋之间的反馈机制是什么？ （iii）墨西哥湾流的变化可以响应大西洋子午倾覆循环（AMOC）变化会产生明显的大气反应吗？如果是这样，那么什么动态过程才能使这种响应？这项活动的更广泛影响是实质的：这项研究将增强我们对预测全球气候变化对大西洋地区影响的不确定性的理解，该地区对该地区的国家产生了重要的社会和经济后果。