Sentences with phrase «stratospheric polar vortex»

While the upper - troposphere tropical warming induces a poleward shift of the jet in winter, Arctic Amplification and a weaker stratospheric polar vortex result in the opposite effect.

Reichler's study ventured into new territory by asking if changes in stratospheric polar vortex winds impart heat or cold to the sea, and how that affects the sea.

Speaking of which, Cohen is coauthor of a study published online in BAMS on February 1 that finds a tendency toward a weaker stratospheric polar vortex — in turn explaining the bulk of midlatitude winter cooling observed across Eurasia since 1990.

When the warming extended into the stratosphere, however, disruptions of the stratospheric polar vortex were likely.

His «six - step» cycle, which progresses from snow cover in Siberia to the breakdown of the stratospheric polar vortex and a more meandering jet stream, also has room for melting sea ice, he says — and he notes that he has successfully used this series of links to predict changes in the polar vortex, including the powerful winter storms of early 2015 in the northeastern United States.

«In winter, the freezing Arctic air is normally «locked» by strong circumpolar winds several tens of kilometers high in the atmosphere, known as the stratospheric polar vortex, so that the cold air is confined near the pole,» says Marlene Kretschmer from PIK, lead - author of the study to be published in the Bulletin of the American Meteorological Society.

This result, along with the nearly identical AO trends in models SO and SG, suggests that ozone forcing is not necessary to increase the AO index or to strengthen the stratospheric polar vortex.»

Major Mid-winter Warming (MMW)- The predominant wind direction around North Pole circulating around the stratospheric polar vortex is from west to east.

Abatzoglou, J.T., and G. Magnusdottir, 2007: Wave breaking along the stratospheric polar vortex as seen in ERA - 40 data, Geophys.

Abatzoglou, J.T., and G. Magnusdottir, 2007: Correction to «Wave breaking along the stratospheric polar vortex as seen in ERA - 40 data», Geophys.

a combination of unusual tropical conditions, the stratospheric polar vortex, and climate warming

Using carefully tailored atmosphere / ocean model experiments, the research team found that a combination of unusual tropical conditions, the stratospheric polar vortex, and climate warming were behind the extreme rainfall, which led to severe flooding across many parts of the UK.

Readers may be surprised to know that part of the answer may be found high in the atmosphere above the Arctic in connection with a phenomenon known as the stratospheric polar vortex, which I wrote about a couple years ago on this blog.

During the first period the stratospheric polar vortex, a system of strong westerly winds at altitudes 10 - 50 km, is projected to weaken, and this weakening slows down westerly winds all the way down to the surface, cancelling out the effect of the increasing temperature difference between the Tropics and the Pole», explains researcher Alexey Karpechko from FMI.

However during the second period, the stratospheric polar vortex is projected to strengthen.

The forecast of the stratospheric polar vortex on December 10 is very unfavorable for North America.

That link goes through the stratospheric polar vortex.»

Dann Mitchell completed his PhD at Reading University in stratospheric dynamics in 2011, where his thesis was titled «Extreme variability of the stratospheric polar vortex».

A burst of widely publicized research over the past decade found that the depleted Arctic sea ice could be part of a chain of events weakening the stratospheric polar vortex and hiking the risk of cold outbreaks in northern midlatitudes.