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. ***

摘要 太阳的变化是气候变化的一个可能来源。 这里的目标是获得一个改进的观测和 短期动态效应的理论认识 平流层上部太阳紫外线的变化。 详细 纬向平均温度、风和 导出的环流统计与测量的太阳通量 将进行近200 nm的测试，以确定是否存在 平流层动力学变化的统计意义 太阳紫外线的变化。 将特别注意 太阳紫外线的变化可能会迫使或激发 行星尺度的行波，其优选周期接近27 在平流层上部的天数（1-3毫巴）。之间的干扰 短期太阳紫外驱动瞬态波和驻波 从下而上的强迫可能会影响 北方冬季平流层变暖， 对中部年际气候的影响 气氛 ***