Abstract: Long decorrelation time scales of the annular mode are observed in the lower stratosphere. This study uses a simple dynamical model, which has been used extensively to study stratosphere?troposphere coupling to investigate ...

Abstract: sing the recently developed mean?variance of logarithms (MVL) diagram, together with The Observing System Research and Predictability Experiment (THORPEX) Interactive Grand Global Ensemble (TIGGE) archive of medium-range ...

Abstract: he mean state, variability, and extreme variability of the stratospheric polar vortices, with an emphasis on the Northern Hemisphere (NH) vortex, are examined using two-dimensional moment analysis and extreme value theory ...

Abstract: nalysis of the forecasts and hindcasts from the ECMWF 32-day forecast model reveals that there is statistically significant skill in predicting weekly mean wind speeds over areas of Europe at lead times of at least 14?20 ...

Abstract: strong link exists between stratospheric variability and anomalous weather patterns at the earth?s surface. Specifically, during extreme variability of the Arctic polar vortex termed a ?weak vortex event,? anomalies can ...

Abstract: ith extreme variability of the Arctic polar vortex being a key link for stratosphere?troposphere influences, its evolution into the twenty-first century is important for projections of changing surface climate in response ...

Abstract: uring volcanic eruptions, Volcanic Ash Advisory Centres issue ash advisories for aviation showing the forecasted outermost extent of the ash cloud. During the 2010 Icelandic volcano Eyjafjallajökull eruption, the Met Office ...