Collaborative Research: Exploring the Chemical Reach of the Madden-Julian Oscillation: Satellite/In-Situ Data Analysis and Chemistry/Transport Modeling

麦登-朱利安涛动（MJO）是气候系统中大气季节内变率的主要形式。它与广泛的物理天气和气候现象（例如，季风的发作和中断、厄尔尼诺Niño-Southern涛动和飓风）相互作用并产生影响。然而，MJO对气候系统化学成分的影响尚不清楚，甚至没有充分的文献记录。本项目研究MJO对大气臭氧和气溶胶的影响，这是两个重要的大气成分。首先，研究人员将利用来自许多卫星传感器和现场观测的丰富的大气臭氧和气溶胶数据集来表征大气臭氧和气溶胶的季节内变化的时空模式，以及与这些变化相关的动力和水文模式（例如，降雨、风和水蒸气）。其次，他们将比较卫星/原位观测和化学/输送模式（CTM）（例如，带化学的群落大气模式）模拟之间的大气臭氧和气溶胶的季节内变化，以便量化CTM对大气臭氧和气溶胶的季节内变化的表征的保真度。在可能的情况下，他们将把模式和观测结合起来，更全面地了解大气臭氧和气溶胶季节内变化背后的动力和化学过程。这一项目将有助于更好地记录和理解大气臭氧和气溶胶的季节内变化，以及它们在观测和模式中与MJO的联系。它将有助于康奈尔大学的研究生培训，加州理工学院的夏季本科生培训以及各种学术和实验室机构之间的多学科互动，包括加州大学洛杉矶分校、加州理工学院、康奈尔大学、喷气推进实验室和戈达德太空飞行中心。该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。

The Madden-Julian Oscillation (MJO) is the dominant form of atmospheric intraseasonal variability in the climate system. It interacts with and influences a wide range of physical weather and climate phenomena (e.g., monsoon onsets and breaks, El Niño-Southern Oscillation, and hurricanes). However, the impacts of the MJO on the chemical component of the climate system are not understood nor even well documented. This project studies the MJO's impacts on atmospheric ozone and aerosols, two important atmospheric constituents. First, the investigators will utilize a rich set of atmospheric ozone and aerosol data from a number of satellite sensors and in-situ observations to characterize the spatial and temporal patterns of intraseasonal variability of atmospheric ozone and aerosols as well as the dynamical and hydrological (e.g., rainfall, winds, and water vapor) patterns associated with these variations. Second, they will compare the intraseasonal variations of atmospheric ozone and aerosols between satellite/in-situ observations and chemistry/transport model (CTM) (e.g., Community Atmosphere Model with chemistry) simulations in order to quantify the fidelity of the CTM's representation of intraseasonal variability of atmospheric ozone and aerosols. Where possible, they will use the model and observations together to more fully understand the dynamical and chemical processes behind the intraseasonal variations of atmospheric ozone and aerosols. This project will lead to better documentation and understanding of the intraseasonal variations of atmospheric ozone and aerosols and their connection to the MJO in both observations and models. It will contribute to a graduate student training at Cornell, a summer undergraduate training at Caltech and multidisciplinary interactions among various academic and laboratory institutions, including UCLA, Caltech, Cornell, Jet Propulsion Lab and Goddard Space Flight Center.This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).