Collaborative Research: Isentropic Chemical Transport Modeling

该奖项是为合作研究项目提供支持的两个奖项之一。 同伴奖授予加州大学圣巴巴拉分校的Mahowald博士（ATM-9902987）。该项目涉及在等熵坐标系中建立一个化学迁移模型。 等熵坐标的优点是可能更好地捕捉大气的传输特性，因为它们代表中性浮力表面，因此是一个更自然的传输坐标。 出发点是一个现有的化学传输模型，在国家大气研究中心开发的MATCH模型。 将该模式的垂直坐标转换为等熵系统，并相应地修改亚网格尺度混合和边界层混合参数化。 特别是，预计该模式将更好地捕捉对流层顶附近传输的性质，从而有助于更好地了解平流层-对流层交换过程。 主要研究人员将通过将痕量气体传输的模拟与其他模型结果和观测结果进行比较来测试模型的真实性。该项目由大气化学和大规模动态气象学方案联合支持。

This award is one of two made to provide support for a collaborative research project. The companion award is to Dr. Mahowald, University of California at Santa Barbara (ATM-9902987). The project involves the development of a chemical transport model in isentropic coordinates. Isentropic coordinates have the advantage of potentially better capturing the transport characteristics of the atmosphere because they represent surfaces of neutral buoyancy and, thus, are a more natural coordinate for transport. The starting point is an existing chemical transport model, the MATCH model developed at the National Center for Atmospheric Research. This model's vertical coordinate will be converted to an isentropic system and the sub-grid scale mixing and boundary layer mixing parameterizations modified accordingly. It is expected that, in particular, the model will better capture the nature of the transport near the tropopause and thereby contribute to better understanding of stratospheric-tropospheric exchange processes. The principal investigators will test the model's realism by comparing simulations of trace gas transport with other model results and with observations. This project is supported jointly by the Atmospheric Chemistry and Large-scale Dynamic Meteorology Programs.