SGER: Testing the Tropical Cyclone-Induced Ocean Heat Pump Hypothesis in CCSM

该提案将利用探索性研究小额资助项目（SGER）资助的资金，研究热带上层海洋的垂直混合是否可以纳入全球气候模型。垂直混合通过影响地表能量收支、海洋经向翻转环流、海洋热输送和初级生产力在现代气候中发挥重要作用。总的来说，这项研究一般是建立在当前科学讨论的基础上，围绕温室气体增加导致海洋温度升高的可能性，从而产生更强烈、更频繁的飓风和旋风。具体来说，研究人员将对全球海洋模型进行敏感性研究，该模型使用飓风和NCAR社区气候系统模型（CCSM） 3.0版的海洋成分。研究人员将合并风场数据（代表日本再分析项目25年再分析数据集的热带气旋）与标准海洋模式强迫数据。目的是诊断这种混合对上层海洋示踪场（即温度、盐度、理想年龄）以及其他相关变量（如混合层深度、经向翻转流函数和海洋热输送）的影响。此外，气旋风场将随常数因子的变化而变化，以建立海洋混合对气旋强度的参数依赖性。

This proposal will use funds, under the auspices of the Small Grants for Exploratory Research (SGER) program, to examine whether vertical mixing in the upper tropical oceans can be incorporated into global climate models. Vertical mixing performs an important role in the modern day climate by affecting surface energy budgets, ocean meridional overturning circulation, ocean heat transport, and primary productivity. In general, the research is generally founded on the current scientific discussion surrounding the plausibility of increased greenhouse gas warming causing increased ocean temperatures that spawn more intense and more frequent hurricanes and cyclones. Specifically, the researcher will run a sensitivity study on a global ocean model using cyclone winds and the ocean component of NCAR's CCSM (Community Climate System Model) version 3.0. The researcher will merge wind fields data (representing tropical cyclone winds the Japanese Reanalysis Project 25 Year reanalysis data set) with standard ocean model forcing data. The goal is to diagnose the impacts of this mixing on upper ocean tracer fields (i.e., temperature, salinity, ideal age) as well as on other relevant variables such as mixed layer depth, meridional overturning stream function, and ocean heat transport. In addition, cyclone wind fields will be varied by constant factors to establish the parametric dependence of ocean mixing on cyclone intensity.