Extratropical Stratosphere-Tropical Troposphere Coupling

为了更好地了解冬季特别是平流层突然变暖时平流层与热带对流层之间的动力相互作用，我们将利用对流层-平流层模式进行一系列数值试验。将进行长时间模拟以获得可靠的结果。 这些动态联系对于了解已知的气候变异模式和评估平流层臭氧消耗与对流层气候之间可能存在的联系十分重要。将讨论平流层突然变暖对热带气候的影响以及厄尔尼诺/南方涛动变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比较（GCM）大气环流模式的结果与简化的物理模型的结果来解决。更广泛的影响：这些实验将有助于解释观测到的热带和平流层气候趋势，对于评估自然和人为原因对这些趋势的相对贡献可能很重要。这项工作将由来自日本的博士后研究员进行，并将有助于他的培训和日本和美国研究人员之间的合作。

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.