Stratospheric Dynamical Effects of Solar Ultraviolet Variations

太阳紫外线变化的平流层动力学效应

• 批准号: 9012012
• 负责人: Lon Hood
• 金额: $ 20万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-15 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9012012&HistoricalAwards=false
• 关键词: Stratospheric; Dynamical; Effects; Solar; Ultraviolet

ABSTRACT Solar variability is one possible source of climate change. The objective here is to obtain an improved observational and theoretical understanding of the dynamical effects of short-term solar ultraviolet variations in the upper stratosphere. Detailed cross-spectral studies of zonal mean temperatures, winds, and derived circulation statistics versus the measured solar flux near 200 nm will be conducted to determine the existence and statistical significance of dynamical changes in the stratosphere produced by solar UV variations. Special attention will be given to the possibility that solar UV variations may force or excite traveling planetary-scale waves with preferred periods near 27 days in the upper stratosphere (1-3 mbar). Interference between short-term solar UV-driven transient waves and stationary waves forced from below may be capable of affecting the initiation of stratospheric warmings in the northern hemisphere winter with consequent effects on the interannual climatology of the middle atmosphere. ***

抽象太阳可变性是气候变化的可能来源。 这里的目的是获得对短期太阳能紫外线变化在上层平流层中的动态影响的改进的观察和理论理解。 详细的跨光谱研究将对占地平均温度，风和衍生的循环统计数据与在200 nm接近的太阳通量相比，以确定由太阳能UV变化产生的平流层动态变化的存在和统计显着性。 特别注意太阳能紫外线变化可能会迫使或激发行进的行星尺度波，而在平流层上部（1-3 MBAR）接近27天（1-3 MBAR）。短期太阳能紫外线驱动的瞬态波和从下方强迫的固定波之间的干扰可能能够影响北半球冬季平流层变暖的开始，从而对中间大气中的年度气候产生影响。 ***