Solar and Quasi-decadal Modulation of the Stratospheric Circulation

平流层环流的太阳和准十年调制

• 批准号: 9303068
• 负责人: Mark Baldwin
• 金额: $ 17.64万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9303068&HistoricalAwards=false
• 关键词: Solar; Quasi; decadal; Modulation; Stratospheric

This research will explore the decadal-scale interannual variability of the stratosphere, with the goal of increasing our understanding of the effects of both internal and solar-driven interannual variability and how these signals propagate through the atmosphere. Several signals or forcings have been identified which may account for many of the year-to-year changes in the stratospheric circulation. These signals include the quasi-biennial oscillation of the tropical stratosphere, the 11-year solar cycle, secular trends (possibly due to global climate change), El Nino/Southern Oscillation and tropospheric signals, and low-frequency modulation of higher-frequency signals. The approach will be to use a combination of observational data analysis and numerical modeling to explore the existence, causes, and propagation of decadal-scale signals in the stratosphere. Observational work will exploit gridded atmospheric data sets, rocketsonde observations, and satellite- and ground- based ozone measurements. Techniques such as correlations, composites, and empirical orthogonal functions will be used to identify interannual signals in the data. The effect of changes in solar output on the earth's recent climate is not well known. Likewise, decadal variations of the earth-atmosphere system apart from solar influence are poorly understood. The understanding of the interannual variability of the stratosphere is important not only because of its links to the troposphere, but due to possible identification of secular global climate trends and the role of solar variability in determining the global climate. #

本研究将探讨十年尺度的年际变化 平流层的变化，目的是增加我们的 了解内部和太阳能驱动的影响 年际变化以及这些信号如何通过 气氛 已经确定了几种信号或强迫， 解释了平流层中的许多逐年变化 流通 这些信号包括准两年振荡 11年太阳活动周期，长期 趋势（可能是由于全球气候变化），厄尔尼诺/南方 振荡和对流层信号以及低频调制 更高频率的信号。 该方法将结合使用观察 数据分析和数值模拟，以探讨存在， 十年级信号的传播 平流层 观测工作将利用网格化的大气 数据集，火箭探测观测，卫星和地面， 臭氧测量。 相关性等技术， 复合材料，经验正交函数将用于 识别数据中的年际信号。 太阳输出的变化对地球最近的 气候不太清楚。 同样， 地气系统除了太阳的影响， 明白 对长江口降水年际变化的认识 平流层之所以重要，不仅是因为它与大气的联系， 对流层，但由于可能的长期全球识别 气候趋势和太阳变率在确定 全球气候 #