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.

该项目旨在确定模型分辨率、模型物理改进以及所用海洋模型的性质（动力海洋与混合层海洋）如何影响地球表面平流层变化的影响。 PI将检查北大西洋的任何降温在多大程度上是自然变化或强迫的特征（包括海洋热传输变化、大气环流变化、温室气体和/或气溶胶负荷增加）。 PI 将 (i) 量化将平流层动力学纳入气候变化实验的重要性以及重要对流层和海洋反馈的潜力； (ii) 预测（根据给定情景）北大西洋表面气温的未来趋势，并检查其对平流层和海洋成分的依赖性； (iii) 检查人为气候变化的指纹在研究中使用的所有模型配置中的稳健程度。 将使用具有更精细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。这将改善平流层的太阳循环加热效果。将使用年际变化的海表温度，这可能有助于生成比低分辨率更真实的夏季结果。 这项工作很重要，因为它将增进人们对平流层在气候中的作用的了解。