An update of observed stratospheric temperature trends

摘要: An updated analysis of observed stratospheric temperature variability and trends is presented on the basis satellite, radiosonde, lidar observations. Satellite data include measurements from series NOAA operational instruments, including Microwave Sounding Unit covering 1979–2007 Stratospheric (SSU) 1979–2005. Radiosonde results are compared for six different sets, incorporating a variety homogeneity adjustments to account changes in instrumentation observational practices. Temperature lower stratosphere show cooling ∼0.5 K/decade over much globe 1979–2007, with some differences detail among radiosonde satellite sets. Substantially larger Antarctic during spring summer, association development ozone hole. Trends derived also analyzed longer record (back 1958); presatellite era (1958–1978) have large range homogenized implying trend uncertainties. middle upper been SSU data, taking into weighting functions due atmospheric CO2 increases. The mean 0.5–1.5 1979–2005, greatest near 40–50 km. anomalies throughout were relatively constant decade 1995–2005. Long records at few locations reasonable agreement trends, although sampling uncertainties localized measurements. Updated estimates solar cycle influence temperatures statistically significant signal tropics (∼30°N–S), an amplitude (solar maximum minus minimum) K (lower stratosphere) ∼1.0 (upper stratosphere).