CEDAR: Investigating Atmospheric Effects of Energetic Particle Precipitation Using Whole Atmosphere Community Climate Model (WACCM)

CEDAR：使用整个大气群落气候模型 (WACCM) 研究高能粒子降水的大气影响

• 批准号: 0940124
• 负责人: Cora Randall
• 金额: $ 17.16万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-01-15 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0940124&HistoricalAwards=false
• 关键词: CEDAR; Investigating; Atmospheric; Effects; Energetic

The research project entails a modeling effort with the goal of better understanding the role of energetic particle precipitation at mesospheric altitudes on temperature and chemical composition at stratospheric altitudes. The nitric oxide produced by the precipitation of energetic electrons has a long lifetime to be transported downwards into the stratosphere where it can affect ozone chemistry. This process is especially effective during the polar winter. The different components of this stratosphere-mesosphere coupling path are not understood at present. The research work will be directed toward the evaluation and improvement of modeling of this coupling in the framework of National Center for Atmospheric Research (NCAR) Whole Atmosphere Community Climate Model (WACCM). In particular, improved gravity wave parameterizations will be developed for WACCM to more accurately describe the downward transport of nitric oxide and nitrogen dioxide induced by the precipitation. Furthermore, the sensitivity of WACCM simulations to changes in gravity wave parameterization will be quantified as well as nitric oxide transport variability.

该研究项目需要进行建模工作，目的是更好地了解中间层高度高能粒子降水对平流层高度温度和化学成分的作用。高能电子沉淀产生的一氧化氮具有很长的寿命，可以向下输送到平流层，在那里它可以影响臭氧化学。 这个过程在极地冬季尤其有效。 目前还不了解平流层-中间层耦合路径的不同组成部分。 本文的研究工作将致力于在美国国家大气研究中心（NCAR）的全大气社区气候模式（WACCM）的框架下对这种耦合的模拟进行评估和改进。 特别是，改进的重力波参数化将开发WACCM更准确地描述了由降水引起的一氧化氮和二氧化氮的向下输送。 此外，WACCM模拟重力波参数化的变化的敏感性将被量化，以及一氧化氮运输的变异性。