Collaborative Research: Gravity Current Entrainment Climate Process Team

合作研究：重力流夹带气候过程团队

• 批准号: 0336809
• 负责人: Arnold Gordon
• 金额: $ 11.42万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-10-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0336809&HistoricalAwards=false
• 关键词: Collaborative; Research; Gravity; Current; Entrainment

A Climate Process Team will be assembled to develop parameterizations of gravity current entrainment for inclusion in ocean general circulation models. A better representation of overflow processes in climate models is crucial to better capture the variability of the thermohaline circulation, including abrupt climate change. First, entrainment in observations and process studies will be closely examined and the derived knowledge will be used to develop new parameterizations of entrainment. Several recent observational programs have examined the entrainment in overflow gravity currents, and many recent laboratory and numerical process studies have elucidated a variety of physical processes contributing to entrainment. Several possible formalisms for including such processes into climate models have been developed. For both isopycnal and z-coordinate Ocean General Circulation Models (OGCM), preliminary parameterizations of gravity currents exist which can be modified to better incorporate new understanding of the physics of entrainment. The new parameterizations will be implemented and evaluated in three classes of OGCMs.Broader impacts of the proposed activity: Gravity current entrainment is an important component of the ocean climate circulation, and this study will enhance our understanding of this process and its role in the climate. This study will enhance links between modeling centers and academic institutions; provide concrete products in the form of new parameterizations which can be used by the whole climate modeling community; benefit society by enabling more reliable predictions of climate variability; promote interdisciplinary training through funding of 2 post-docs; disseminate results through annual workshops involving the larger community; promote underrepresented groups (female coordinating PI).

将组装一个气候过程团队，以开发重力电流夹带的参数化，以包含在海洋通用循环模型中。在气候模型中更好地表示溢流过程对于更好地捕获热盐循环的变异性（包括突然的气候变化）至关重要。首先，将对观察和过程研究的夹带进行仔细检查，并将使用派生的知识来开发夹带的新参数化。最近的一些观察计划检查了溢流重力电流的夹带，许多最近的实验室和数值过程研究阐明了各种有助于夹带的物理过程。已经开发了几种将此类过程纳入气候模型的可能形式主义。对于等距和Z坐标海洋通用循环模型（OGCM），存在重力电流的初步参数化，可以修改，以更好地融合对夹带物理物理学的新理解。新的参数化将在三类的OGCM中实施和评估。拟议活动的Broader影响：重力电流夹带是海洋气候循环的重要组成部分，这项研究将增强我们对这一过程及其在气候中的作用的理解。这项研究将增强建模中心与学术机构之间的联系；以新的参数化形式提供混凝土产品，可以由整个气候建模社区使用；通过实现对气候变异性的更可靠的预测来使社会受益；通过资助2个后培训来促进跨学科培训；通过涉及较大社区的年度研讨会来传播结果；促进代表性不足的群体（女性协调PI）。