Extratropical Stratosphere-Tropical Troposphere Coupling

利用对流层-平流层模式进行了一系列数值试验，以更好地了解冬季，特别是在平流层突然变暖期间，温带外平流层和热带对流层之间的动力相互作用。将进行长时间的模拟，以获得可靠的结果。这些动力学联系对于理解气候变化的已知模式以及评估平流层臭氧消耗和对流层气候之间的可能联系很重要。本课程将讨论平流层突然变暖对热带气候的影响，以及诸如ENSO暖事件等热带变化对平流层气候的影响。辐射和对流在这些过程中的作用将通过将(GCM)大气环流模式的结果与简化物理模型的结果进行比较来讨论。更广泛的影响：这些实验将有助于解释热带和平流层气候中观察到的趋势，并可能对评估自然和人为原因对这些趋势的相对贡献很重要。这项工作将由一名来自日本的博士后研究员进行，并将为他的培训和日美研究人员之间的合作做出贡献。

ATM 0332269Extratropical Stratosphere and Tropical Troposphere InteractionABSTRACTA series of numerical experiments with a troposphere-stratosphere model will beundertaken to better understand the dynamical interactions between the extratropical stratosphere and tropical troposphere during winter, especially during sudden stratospheric warmings. Long simulations will be performed to obtain reliable results. These dynamical connections are important in understanding known modes of climate variability, and in assessing the possible connections between stratospheric ozone depletion and tropospheric climate. Both the effect of sudden stratospheric warmings on tropical climate and the effect of tropical changes such as ENSO warm events on stratospheric climate will be addressed. The roles of radiation and convection in these processes will be addressed by comparing (GCM) general circulation model results with results from a model with simplified physics. Broader Impacts:These experiments will help interpret observed trends in tropical and stratospheric climate, and may be important for assessing the relative contributions of natural and human induced causes for these trends. The work will be conducted by a post-doctoral researcher from Japan, and will contribute to his training and to collaborations between Japanese and American researchers.