Internal and External Causes of Climatic Changes

拟议研究的目的是继续研究第四纪冰川的物理机制。将进一步开发这些机制的简单模型，包括古海洋环流的盒子模型，以及先前建立的辐射平衡、冰盖质量平衡和水文循环模型。模型结果将在光谱和时间域与海洋和大陆古气候数据进行比较，包括Vostok冰芯记录和加速器质谱仪测年的海洋记录。以前对大气低频变化的研究也将得到扩展，强调全球大气的季节内振荡。这项研究将通过简单和中间模式的层次结构的理论研究、最长的高空数据集的观测研究和加州大学洛杉矶分校的GCM进行。这项研究的结果将有助于缩小我们对古气候和现代气候之间的理解差距。

The objective of the proposed study is to continue research on the physical mechanisms of Quaternary glaciations. Simple models of these mechanisms will be developed further, including box models of the paleooceanic circulation, in addition to the previously-modeled radiation balance, ice-sheet mass balance and hydrologic cycle. Model results will be compared in the spectral and temporal domain with marine and continental paleoclimatic data, including the Vostok ice-core records and marine records dated by Accelerator Mass Spectrometry. The previous research on the low-frequency variability of the atmosphere will also be extended, emphasizing intraseasonal oscillations in the global atmosphere. This research will proceed through theoretical studies with a hierarchy of simple and intermediate models, observational studies of the longest upper-air datasets, and the UCLA GCM. The results of the study will be valuable in helping us to narrow the gap in our understanding between paleoclimate and more the recent climate.