Advancing the Understanding of the Impacts of Wave-Induced Temperature Fluctuations on Atmospheric Chemistry

这项研究通过量化大气波对平流层下层和对流层上层化学的影响，将大气动力学与大气化学联系起来。由这些波引起的温度变化将使用全大气群落气候模式（WACCM）来模拟。这项工作将为广大的大气建模者提供新的工具。本研究共分为三个部分。第一部分：利用社区地球系统模式（CESM）的重力波参数化，评估由中尺度重力波引起的重力波温度扰动的振幅，并将其应用于WACCM的化学方案，重点研究非均质卤素化学对液态大气气溶胶和极地平流层云的影响。第2部分：利用WACCM评估低纬度地区赤道波的化学成分响应，重点研究非均质卤素化学和赤道波引起的环流变化的影响。这项工作将针对NO、NO2、N2O5、HNO3、ClONO2、HCl、臭氧和OH等相关物质的响应，研究年际变化，并在卫星数据中寻找这些变化的证据。第三部分：研究重力波对一系列气相反应的影响，研究从对流层顶到平流层顶对大气成分的影响。本研究将重点研究波浪活动对N2O5、NO、NO2、HNO3以及其他热分解物质（包括PAN）分布的影响。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This research links atmospheric dynamics to atmospheric chemistry through efforts to quantify the influence of atmospheric waves on the chemistry of the lower stratosphere and upper troposphere. Changes in temperature due to these waves will be modeled using the Whole Atmospheric Community Climate Model (WACCM). This work will provide new tools for use by the broad community of atmospheric modelers.This research is divided into 3 parts. Part 1: Evaluate the amplitude of gravity-wave induced temperature perturbations due to mesoscale gravity waves, using the Community Earth System Model (CESM) parameterizations for gravity waves, and applying these in the chemical scheme of WACCM, focusing on heterogeneous halogen chemistry effects on liquid atmospheric aerosols as well as polar stratospheric clouds. Part 2: Evaluate the chemical composition responses to equatorial waves at low latitudes using WACCM, focusing on the effects of heterogeneous halogen chemistry and circulation changes induced by the waves. This work will target responses in NO, NO2, N2O5, HNO3, ClONO2, HCl, ozone, and related species such as OH, examining inter-annual variations, and searching for evidence of these in satellite data. Part 3: Study the influence of gravity waves on a comprehensive range of gas-phase reactions and study the effects on atmospheric composition from the tropopause region to the stratopause. This effort will focus on the influence of wave activity on the distributions of N2O5, NO, NO2, HNO3, and other species subject to thermal decomposition including PAN.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.