Stratospheric Dynamical Effects of Solar Ultraviolet Variations

太阳变率是气候变化的一个可能来源。这里的目标是获得对平流层上层太阳紫外线短期变化的动力学效应的更好的观测和理论认识。将对纬向平均温度、风和推导出的环流统计数据与200 nm附近实测的太阳通量进行详细的交叉光谱研究，以确定太阳紫外线变化引起的平流层动力学变化的存在及其统计意义。将特别注意太阳紫外线的变化可能会迫使或激发在平流层上层（1-3毫巴）以27天为首选周期的行行星尺度波。太阳紫外线驱动的短期瞬态波和从下面强迫的静止波之间的干扰可能会影响北半球冬季平流层变暖的开始，从而对中层大气的年际气候学产生影响。* * *

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. ***