The influence of the stratospheric Quasi-Biennial Oscillation on trace gas levels at the Earth’s surface

摘要: The Quasi-Biennial Oscillation (QBO) of tropical zonal wind is one the most important modes interannual variability in stratosphere. It well established that QBO influences distribution trace gases throughout global What has not been clearly shown thus far whether stratospheric a consistent and significant impact on tropospheric gases. Here we demonstrate effects transport gas distributions regularly persistently extend into troposphere, which long-lived mole fractions at Earth’s surface. We show surface one- to five-year timescales primarily driven by QBO. influence constituent arises from modulation stratosphere troposphere mass flux apparent measurements, as chemistry–climate model simulations chlorofluorocarbon-11, chlorofluorocarbon-12 nitrous oxide. total emissions estimated measured changes mean these ozone-depleting species, other gases, will be improved accurately accounting for QBO-driven variability. Interannual variations are Oscillation, according measurements simulations. Ignoring this may induce errors estimating