Sentences with phrase «jetstream zonality»

I think etudiant has an interesting point concerning the jetstream (300mb level) and the reduction in its relative humidity.

Shifting jetstream patterns, which have a strong influence on weather patterns in western Europe are one important component of a weather system, but only represent a change in climate if there is an apparently permanent shift north or south.

My feeling on the latter, is that solar magnetic cycles affect far - UV / stratospheric / jetstream patterns and the long - term heat storage of the oceans; and that the former shorter cycles may be a stochastic resonance phenomenon entrained in the long term pattern.

Here is a possible answer to the questions raised in Saturday's:: Where will the turbines be - 30,000 feet up in the jetstream where the wind is strong and steady.

The models predicted that a warming world would push the jetstream toward the poles.

The British Isles are not only tucked beside a vast Atlantic Ocean whose temperatures have a powerful effect on our weather, they are also at the receiving - end of the jetstream.

Some researchers also think there may be a link between climate change and changes to the jetstream flowing above North America, which could mean more blocking ridges like the one that corralled Sandy back toward the East Coast.

But recent events and trends dealing with this type of wavy, snakelike jetstream are consistent with some of the latest science coming in.

Temperatures often fluctuate in the Arctic due to the strength or weakness of the polar vortex, the circle of winds — including the jetstream — that help to deflect warmer air masses and keep the region cool.

Opposite signed trends in the Southern Hemisphere middle latitude jetstream are expected in response to the recovery of the Antarctic ozone hole (Son et al., 2010; Arblaster et al., 2011; Polvani et al., 2011).

Observational and numerical evidence of a poleward shift in the Southern Hemisphere middle latitude jetstream (a positive trend in the Southern Annular mode) in response to Antarctic ozone depletion (Gillett and Thompson, 2003; Arblaster and Meehl, 2006; Son et al., 2010; Polvani et al., 2011; McLandress et al., 2011; Thompson et al., 2011).

The poleward shift of the Southern Hemisphere middle latitude jetstream in response to increasing carbon dioxide is one of the most robust circulation responses found in climate change experiments, and is predicted to occur during all seasons (IPCC, 2007c).

And while broad northward - bulging ridges in the jetstream may have gifted the Northeast an unseasonably warm winter in 2011 - 2012, a big ridge doesn't always spell clear skies, as Sandy shows.

A new video describes the mechanics of the shifting jetstream through a presentation by Jennifer Francis with the Institute of Marine and Coastal Sciences at Rutgers University.

My own view is that the initiating mechanism is not small shifts in insolation hitting some kind of trigger related to snow albedo (the land - sea snow - ice area is relatively small compared to potential shifts in cloud amount and spatial distribution)-- rather it is shifts in global winds which likely relate to shifts in the jetstream (linked to...?

Rapid warming in the Arctic and sea ice melt may be weakening the jetstream, creating a more meandering, slower - moving jetstream.

The whole reason the jetstream exists is because of the temperature difference between the Earth's equator and poles.

A weaker north - south temperature gradient may cause a weaker jetstream.

There is still a lot to understand about how the dramatic changes occurring in the Arctic will affect weather patterns further south — in particular, if and how the jetstream might be affected will be vital.

The effect was clearly due to meridional jetstream flow patterns guiding moist air south on to the icecap.

Forcing a jetstream like latitudinal circulation to a higher latitude takes work.

And if the Northern Branch of the polar jetstream goes north, there is a fairly good chance that most winter storms (if they do in fact occur) will produce rain, sleet, mixed precip (that melts quickly).

«The sun causes latitudinal climate zone shifting with changes in the degree of jetstream zonality / meridionality by altering the ozone creation / destruction balance differentially at different heights above the tropopause.

Seems lately we have seen a stalling of regional weather systems moving across the N. Hem, causing an unusually shaped jetstream..

Everything I say is a simple logical extrapolation from what should have been the obvious implications of that change in trend as regards jetstream behaviour.

Here in Norway we have also had yet another storm system battering us on the edge of the jetstream that simply does nt seem to want to move.

Great visualization of the stuck deformed jetstream and the weather related incidents its causing everywhere.

However they do seem to have realised that a warmer lower stratosphere near the poles was required for a more equatorward jetstream regime yet that happened when the sun was less active not more active.

This causes changes in the jetstream position, rain patterns and the Arctic Oscillation (AO).

Francis & Vavrus have recently published interesting findings with regards the behaviour of the jetstream.

[1] CO2 absorbs IR, is the main GHG, human emissions are increasing its concentration in the atmosphere, raising temperatures globally; the second GHG, water vapor, exists in equilibrium with water / ice, would precipitate out if not for the CO2, so acts as a feedback; since the oceans cover so much of the planet, water is a large positive feedback; melting snow and ice as the atmosphere warms decreases albedo, another positive feedback, biased toward the poles, which gives larger polar warming than the global average; decreasing the temperature gradient from the equator to the poles is reducing the driving forces for the jetstream; the jetstream's meanders are increasing in amplitude and slowing, just like the lower Missippi River where its driving gradient decreases; the larger slower meanders increase the amplitude and duration of blocking highs, increasing drought and extreme temperatures — and 30,000 + Europeans and 5,000 plus Russians die, and the US corn crop, Russian wheat crop, and Aussie wildland fire protection fails — or extreme rainfall floods the US, France, Pakistan, Thailand (driving up prices for disk drives — hows that for unexpected adverse impacts from AGW?)

Htel Serviced Apartments Amsterdam Amstelveen There is a jetstream swimming pool.

Currently the services and facilities of this location include: jetstream pool, spa, state of the art gym, 24 hour reception and weekly cleaning.

When you're flying thousands of feet in the air, the clouds in your jetstream, it can feel like the whole world is around you.

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However the company does not plan to launch the Vezel in India in the near term, as a smaller Brio - based SUV has received the green light to hit the jetstream of the Indian mini SUV market.

I am thinking about wind turbines in the jetstream, for starters.

To power Tesla's electric car empire, the company has joined hands with Vestas, a top wind turbine manufacturer, to create a storage system that would make power generated from wind useful during quiet days in the jetstreams.

Sumatra, Indonesia might seem a world away but the smoke from the fires there tends to travel along the jetstreams bringing that smoke and its accompanying degraded air quality across the globe.

That is because global warming, driven in part by the colossal fossil fuel consumption of today's massive global jetliner fleet, is expected to generate stronger wind shear within the stratospheric jetstreams.

Applying a little logic it must be the case that jetstreams waving around latitudinally will produce more clouds than jetstreams travelling in relatively straight lines around the globe.

The size and intensity of the polar vortexes then has an effect on the latitudinal position of the jetstreams which then alters total cloud quantities (and reflectance) so as to alter global albedo and thereby alter solar energy input to the oceans.

Equatorward and / or more meridional jetstreams mean that the troposphere is a bit cooler as the rate pof energy flow through the troposphere declines.

Poleward and / or more zonal jetstreams mean that the troposphere is bit warmer as the rate of energy flow through the troposphere increases.

This causes upwelling in the central Pacific — a lot of cloud near the dateline — and in this situation the Hadley Cell circulation distributes it into the mid latitudes and further north if the circumpolar jetstreams will allow it to (i.e. the winds aren't extending a long way south).

Similarly slowly evolving changes in the middle latitude jetstreams could potentially lead to marked changes in surface temperature and precipitation in regions that lie on the flanks of the storm tracks, such as southern Australia.

Observed trends in the middle latitude jetstreams and annular modes are not robust across all months (IPCC, 2007c).

(In the discussion that follows, the middle latitude jetstreams are the eastward flowing air currents centered in middle latitudes near 6 to 12 km.

The jetstreams are frequently collocated with wintertime storms.)