Seasonal evolutions of N2O, O3, and CO2: Three-dimensional simulations of stratospheric correlations

摘要: Fluctuations in the concentrations of stratospheric trace gases are often correlated over a large range space and time scales, an observation frequently used to infer existence various chemical processes. Three-dimensional models provide tool examine causes variations gas relationships, because they can realistically simulate interplay between photochemistry meteorology. Thus such aid interpretation observed relationships. We use general circulation model Goddard Institute for Space Studies evolution distribution N2O, CO2, O3 year. In modeled lower stratosphere constituents N2O CO2 have well-correlated spatial variations, but slope regression line depends on both season direction sampling. This departure from universal form is due annual cycle tropospheric transport air upper photochemically depleted N2O. Due short photochemical lifetime tropical O3, its relationship with still more varied. particular, O3−N2O changes significantly middle high latitudes, behavior relevant estimating rate polar winter depletion. general, tight correlation two as observed, this datum cannot be similar different sampling may change scatter about it.