CEDAR: Atmospheric Response to Perturbations in Greenhouse Gases with a Spectral Mesosphere Lower Thermosphere Model

过去对全球中层大气变化的研究预测，随着二氧化碳的加倍，热状况、结构和组成将发生戏剧性的变化。PI通过使用三维光谱中间层/低热层模式研究了中间层和低热层(MLT)中二氧化碳倍增的热学和动力学响应，对这些初步发现作出了回应。该模式最近扩展到热层，并在经验气候学上进行了测试，通过对中上层大气的红外辐射传输的参数化，该模式适用于广泛的二氧化碳浓度范围。PI还对该模型进行了修改，以考虑对MLT全球变化研究非常重要的辐射、动力和化学反馈。由于高层大气的相关热收缩，从研究中收集的数据最终可以用于修正在轨和再入太空飞行器的寿命和轨道计算。

Past studies of global changes in the middle atmosphere have predicted dramatic changes in thermal regime, structure, and composition with doubled carbon dioxide. The PI responds to these preliminary findings by examining the thermal and dynamical response to doubling carbon dioxide in the mesosphere and lower thermosphere (MLT), using a three-dimensional Spectral Mesosphere/Lower Thermosphere Model. Recently extended into the thermosphere and tested on empirical climatologies, the model is applied to a wide range of carbon dioxide concentrations through a parameterization of infrared radiative transfer for the middle and upper atmosphere. The PI also modifies this model to account for radiative, dynamical, and chemical feedback important for MLT global change studies. Because of the associated thermal contraction of the upper atmosphere, data gathered from the research can eventually be applied to the revision of life time and trajectory calculations of orbiting and re-entry space vehicles.