Dynamics of the Boreal Summer Intraseasonal Oscillation

北方夏季季节内振荡的动力学

• 批准号: 0073023
• 负责人: Bin Wang
• 金额: $ 39.95万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073023&HistoricalAwards=false
• 关键词: Dynamics; Boreal; Summer; Intraseasonal; Oscillation

This project seeks to determine how the impact of stratospheric changes at the earth's surface is affected by model resolution, improvements in model physics and the nature of the ocean model used (dynamical versus mixed layer ocean). The PIs will examine to what extent any cooling in the North Atlantic is a feature of natural variability or forced (including ocean heat transport changes, changes in atmospheric circulation, increasing greenhouse gases and/or aerosol loadings). The PIs will (i) to quantify the importance of including stratospheric dynamics in climate change experiments and the potential for important tropospheric and oceanic feedbacks; (ii) to project (based on given scenarios) future trends in the North Atlantic surface air temperature and examine their dependence on the inclusion of the stratospheric and oceanic components; and (iii) to examine to what extent fingerprints of anthropogenic climate change are robust over all the model configurations used in the study. The NASA GISS model with finer vertical and horizontal resolution will be used. The model will also include on-line ozone chemistry and transport. This will improve the solar cycle heating effects in the stratosphere. Interannual varying SST will be used, this may help generate more realistic summer results than with the low resolution. The work is important because it will increase understanding of the role of the stratosphere in climate.

该项目旨在确定平流层变化在地球表面的影响如何受模型分辨率的影响，模型物理的改进以及所使用的海洋模型的性质（动力学和混合层海洋）。 PI将检查北大西洋的任何冷却在多大程度上是自然变异性或强制性的特征（包括海洋热传输变化，大气循环的变化，增加温室气体和/或气溶胶载荷）。 PI（i）将量化在气候变化实验中包括平流层动力学的重要性以及重要的对流层和海洋反馈的潜力； （ii）北大西洋表面空气温度的未来趋势（基于给定的情况）进行了预测，并检查了它们对纳入平流层和海洋成分的依赖； （iii）检查人类气候变化的指纹在多大程度上在研究中使用的所有模型构型都有鲁棒性。 将使用具有更精细的垂直和水平分辨率的NASA GISS模型。该模型还将包括在线臭氧化学和运输。这将改善平流层中的太阳周期加热效应。将使用年际变化的SST，这可能有助于产生更现实的夏季结果，而不是低分辨率。 这项工作很重要，因为它将增加对平流层在气候中的作用的理解。