Collaborative Research: Tropical Marine Climate Feedback to Mid- and High-Latitude Climate Change

合作研究：热带海洋气候对中高纬度气候变化的反馈

• 批准号: 0438201
• 负责人: John Chiang
• 金额: --
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0438201&HistoricalAwards=false
• 关键词: Collaborative; Research; Tropical; Marine; Climate

This project will further research into the potential extratropical controls of the marine Intertropical Convergence Zone and consequences to the tropical marine climate and global climate. The working hypothesis is that the marine tropics are sensitive to extratropical influences, in particular through mechanisms similar to those controlling interannual variability of the Atlantic Intertropical Convergence Zone. Four specific questions are identified: What are the mechanisms of the extratropical communication to the tropics from changes to extratropical ice and topography? What are the tropical thermodynamic and dynamic ocean-atmosphere feedbacks to this linkage (e.g., the tropical Pacific annual cycle and El Nino-Southern Oscillation)? What are the resulting global climate impacts to the tropical feedback? What are the potential applications of this study to past and future climate change scenarios? These investigations will primarily be pursued as model studies using the Community Climate Model, version 3, coupled to various simplified surface ocean configurations, including a reduced-gravity tropical ocean model.This is a collaborative effort between research groups at the University of California, Berkeley and Texas A&M. Two graduate students and a postdoctoral associate will receive support, and the project will provide opportunities for undergraduate research. Advances in the understanding of abrupt climate change are anticipated from this work.

该项目将进一步研究海洋热带辐合带的潜在温带控制及其对热带海洋气候和全球气候的影响。工作假设是海洋热带地区对温带影响敏感，特别是通过类似于控制大西洋热带辐合带年际变化的机制。确定了四个具体问题：温带冰和地形的变化与热带地区的温带交流的机制是什么？热带热力学和动态海洋大气对这种联系的反馈是什么（例如，热带太平洋年循环和厄尔尼诺-南方涛动）？全球气候对热带反馈有何影响？这项研究对过去和未来的气候变化情景有哪些潜在应用？这些调查将主要使用社区气候模型第 3 版进行模型研究，并结合各种简化的表面海洋配置，包括减重热带海洋模型。这是加州大学伯克利分校研究小组之间的合作成果和德克萨斯农工大学。两名研究生和一名博士后将获得支持，该项目将为本科生研究提供机会。这项工作预计将在对气候突变的理解方面取得进展。