Studies in Ocean-Atmosphere Interaction

海洋-大气相互作用研究

• 批准号: 9521389
• 负责人: J David Neelin
• 金额: $ 65.41万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521389&HistoricalAwards=false
• 关键词: Studies; Ocean; Atmosphere; Interaction

Abstract ATM-9521389 Neelin, J. David University of California, Los Angeles Title: Studies in Ocean-Atmosphere Interaction This research aims to contribute to understanding climate phenomena that arise by interaction between ocean and atmosphere, and the mechanisms that produce them. Methods developed under the previous NSF grant will be applied but with a change in emphasis in several areas: 1) A new approach will be used for the tropical atmospheric modeling component, based on a method designed to parlay theoretical developments from the previous grant into a new type of nonlinear model. Analytical results for vertical structure that apply under certain convective conditions are used as a basis for numerical models that are valid more generally, but retain high accuracy for low cost near convection regions. This is combined with an efficient treatment of long-wave radiation. More importantly, the models are easy to analyze for insight into the atmospheric side of three-dimensional ocean-atmosphere feedbacks. 2) Investigations into the role of ocean-atmosphere interaction in maintaining the tropical climatology were begun under the previous grant leading to the "climatological version of the Bjerknes hypothesis". This suggest that three-dimensional feedback between trade winds, ocean circulation and gradients of sea surface temperature (SST) are important to the climatological configuration of warm and cold SST regions. The PI will expand this work and attempt to bridge the gap between this hypothesis involving relative SST values and work by other investigators on the processes regulating absolute SST values. 3) Work on modes of tropical interannual variability was a mainstay of the previous grant. The theoretical component of this continues but with less emphasis relative to the above topics. Instead method applied previously to the tropics are to be adapted for midlatitude coupled variability, with the aim of providing a the oretical counterpart for numerical modeling efforts underway by other investigators. This work is important because it seeks new knowledge relevant to our ability to model and predict climate.

摘要 ATM-9521389 Neelin, J. David 加利福尼亚大学洛杉矶分校 标题：海洋-大气相互作用研究 这项研究旨在帮助理解海洋与大气相互作用产生的气候现象及其产生机制。 将应用在先前的 NSF 拨款下开发的方法，但在几个领域的重点有所变化：1）热带大气建模部分将使用一种新方法，该方法基于旨在将先前拨款的理论发展转化为新型非线性模型的方法。 在某些对流条件下应用的垂直结构的分析结果被用作更普遍有效的数值模型的基础，但在对流区域附近的低成本下保持高精度。 这与长波辐射的有效治疗相结合。 更重要的是，这些模型很容易分析，以便深入了解三维海洋大气反馈的大气方面。 2）在先前的资助下开始了对海洋-大气相互作用在维持热带气候方面的作用的调查，从而产生了“比耶克内斯假说的气候学版本”。 这表明信风、海洋环流和海表温度梯度之间的三维反馈对于暖、冷海温区的气候配置具有重要意义。 PI 将扩展这项工作，并尝试弥合涉及相对海表温度值的假设与其他研究人员在调节绝对海表温度值过程的工作之间的差距。 3) 关于热带年际变化模式的研究是上一次资助的支柱。 其理论部分仍在继续，但相对于上述主题的重点较少。 相反，之前应用于热带地区的方法将适用于中纬度耦合变化，目的是为其他研究人员正在进行的数值模拟工作提供理论对应物。 这项工作很重要，因为它寻求与我们模拟和预测气候的能力相关的新知识。