Sentences with phrase «in jet stream changes»

Not exact matches

Some researchers have suggested that climate change, which has resulted in a rapidly warming Arctic, is leading to jet stream kinks that keep extreme weather in place, although that hypothesis is still being debated (ClimateWire, April 3).

The study by the Planetary Sciences Group reports that this gigantic storm is another of the agents of change in the equatorial jet stream.

They compared those events with changes in the Global Wind Oscillation (GWO) index, a collection of climate and weather information that measures atmospheric angular momentum, or the degree of waviness in the jet stream.

The strength and path of the North Atlantic jet stream and the Greenland blocking phenomena appear to be influenced by increasing temperatures in the Arctic which have averaged at least twice the global warming rate over the past two decades, suggesting that those marked changes may be a key factor affecting extreme weather conditions over the UK, although an Arctic connection may not occur each year.

The research is the first reconstruction of historical changes in the North Atlantic jet stream prior to the 20th century.

Since meteorologists can only accurately predict weather within the 10 to 12 days between jet stream flow changes, a shift in this time frame would directly impact weather predictability.

«The jet stream changes character every 10 to 12 days, and we use this pattern to predict the weather,» said Anthony Lupo, professor of atmospheric science in MU's School of Natural Resources, which is located in the College of Agriculture, Food and Natural Resources.

«Weather should remain predictable despite climate change: Simulations of jet stream behavior in a warming climate suggest ranges of forecasts in the mid-century will be similar to those in present day.»

It's called the polar jet stream, and as it writhes eastward across the North American continent, it can bring storms in its wake or herald an unseasonable change in temperature — north of the jet stream lies cold, Arctic air, while to its south are warmer conditions.

But Robeson said the observation aligns with theories about climate change, which hold that amplified warming in the Arctic region produces changes in the jet stream, which can result in extended periods of cold weather at some locations in the mid-northern latitudes.

Widening of the tropics would also probably be associated with poleward movement of major extratropical climate zones due to changes in the position of jet streams, storm tracks, mean position of high and low pressure systems, and associated precipitation regimes.

These detected changes in mid-latitude storm tracks are likely linked to changes in the jet stream and planetary waves in the atmosphere.

The ongoing disappearance of sea ice in the Arctic from elevated temperatures is a factor to changes in atmospheric pressure that control jet streams of air, explained James Overland, an oceanographer of the National Oceanic and Atmospheric Administration, or NOAA.

Dr Screen said: «The results of the computer model suggest that melting Arctic sea ice causes a change in the position of the jet stream and this could help to explain the recent wet summers we have seen.

Astronomers believed this gyre was altering the jet stream's course, much in the same way a large rock would change a nearby river's path.

Importantly, the NAO relates to changes in the strength and position of the North Atlantic jet stream - a band of very fast winds high in the atmosphere.

Those changes may include the loss of Arctic summer sea ice, the collapse of ice sheets in Greenland and western Antarctica, dieback of the Amazon rainforest and changes in the jet stream and the pattern of El Niño and La Niña weather cycles.

The changes in the atmospheric circulation include things like a stronger subtropical jet stream.

Virtually ice - free summers in the arctic sea could well arrive by 2030, with troubling implications for accelerated albedo feedback and possibly disruptive changes in the jet stream.

There are other influences on the jet stream's behavior, and some scientists think that changes in tropical ocean temperatures, or the cyclical recurrence of El Niño, might have a bigger effect on the jet stream than changes in the Arctic.

Research into three centuries of European tree ring data by Valerie Trouet of the University of Arizona found evidence of significant changes in the jet stream starting in the 1960s.

Scientists want to understand how changing the dynamics of the jet stream in models can change how the model predicts the timing and location of these extreme phenomena.

And those changes in the Hadley Circulation can affect the subtropical jet stream — an area of fast - moving air that guides storms — in both the Northern and Southern hemispheres.

The magnetic field is forever changing, and this could even make the jet stream switch direction,» Rune Floberghagen, the ESA's Swarm mission manager, said in a separate statement.

«We've got this huge El Niño out there, we have the warm blob in the northeast Pacific, the cool blob in the Atlantic, and this ridiculously warm Arctic,» says Jennifer Francis, a climate researcher at Rutgers University who focuses on the Arctic and has argued that Arctic changes are changing mid-latitude weather by causing wobbles in the jet stream.

Changes in climate can cause the polar jet stream — the boundary between the cold North Pole air and the warm equatorial air — to migrate south, bringing with it cold, Arctic air.

In Liquidity inc., Steyerl makes one of her characteristic intellectual leaps and connects extreme financial events to extreme climate events: the jet stream of money changes direction when the Dow Jones collapses, then suddenly a gonzo weather forecaster, masked in black, is gesturing across the most political of politically geographical maps you ever saw — noting failed states and off - shore tax havens, isobars indicating flows of capital rather than weather frontIn Liquidity inc., Steyerl makes one of her characteristic intellectual leaps and connects extreme financial events to extreme climate events: the jet stream of money changes direction when the Dow Jones collapses, then suddenly a gonzo weather forecaster, masked in black, is gesturing across the most political of politically geographical maps you ever saw — noting failed states and off - shore tax havens, isobars indicating flows of capital rather than weather frontin black, is gesturing across the most political of politically geographical maps you ever saw — noting failed states and off - shore tax havens, isobars indicating flows of capital rather than weather fronts.

The Paramagnetic Oxygen Transport Thesis explains the failure of Brewer - Dobson equatorial ozone formation, the Ozone Hole in 1983, continued Antarctic cold temps concurrent with Arctic warming, mid-latitude ozone formation which accelerates jet streams and elongates Rossby wave loops, and wandering magnetic poles which control extreme weather and climate change.

Probably by changes in jet stream position, due to changes in UV absorption in the stratosphere.

For instance, changes in ocean convection over the north Atlantic would affect the jet stream, which would have a dramatic effect upon regional precipitation, probably leading to acute drought in the northern hemisphere, which will weaken and push the northern jet stream toward the Arctic.

It is not about the nitpicking over the exact minimum extent, etc., it is about the fact that we are entering unknown climate and weather territories where the jet stream is going to go north, the weather will change drastically in the U.S. and northern Europe, and no one knows how drastically.

One minute change in the atmospheric regime can slowly effect further changes in the system and the chain reaction can occur, which, in the end, could shift a jet stream a few kilometres and create conditions possible for storm intensification, which may result in the flooding of an area where the storm would not have been or would have been greatly minimised.

Or it may be caused by any other mechanism (like the influence of solar changes on the jet stream position) which enhance the simple direct insolation change which is incorporated in several current climate models...

Solar has its largest influence in the lower stratosphere (including changes in jet stream position), CO2 in the lower troposphere.

The second aspect of climate change that is likely affecting Alaska more and more is the apparent tendency of warming in the Arctic and warmer sea surface temperatures in the Pacific to contribute to larger waves in the jet stream.

The jet stream off the East Coast of the United States controls an important climate pattern in the Atlantic... «The North Atlantic Oscillation is really driving these changes in ocean circulation,» said Gerald McCarthy, lead study author and an oceanographer at the University of Southampton in the United Kingdom....

The latest en vogue explanation linking human greenhouse gas emissions to strong winter - season East Coast storms involves changes in the characteristics of the jet stream — a river of fast moving air in the atmosphere that influences both the strength and the forward speed of extratropical storm systems.

One was published several months ago in Geophysical Research Letters by James Screen and Ian Simmonds, who looked for changes in jet stream characteristics using a different methodology than that of Francis and Vavrus.

A prominent (in the media, anyway) research study last year by Rutgers's Jennifer Francis and University of Wisconsin's Stephen Vavrus suggests that the declining temperature difference between the Arctic and the lower latitudes (adding greenhouse gases into the atmosphere warms colder, drier regions more so than warmer, wetter ones — with the notable exception of Antarctica) has led to changes in the jet stream which result in slower moving, and potentially stronger East Coast winter storm systems.

But passengers won't just have to keep their seat belts locked, they may have to stay locked in for longer, as jet stream wind patterns change.

«If loss of sea ice is driving changes in the jet stream, the jet stream is changing Greenland, and this, in turn, has an impact on the Arctic system as well as the climate.

I think there is evidence that AGW has caused the decline in arctic sea ice, which may be responsible for the changes seen in the paths of the jet stream, which may be responsible for the blocking high over Greenland which was responsible for Sandy's left turn.

Although the theory is still being explored, teleconnections are thought to link land use to changes in the polar jet stream, the paths of tropical cyclones, and the frequencies and intensities of droughts, floods, heat waves, and other weather events.

According to climate scientist Michael Mann, it's very possible that several of the recent severe and costly extreme weather outbreaks are linked to changes in the jet stream he identified in a recent study.

You say that there is evidence that AGW has caused the decline in arctic sea ice, which may be responsible for the changes seen in the paths of the jet stream, which may be responsible for the blocking high over Greenland which was responsible for Sandy's left turn.

And science is emerging suggesting a link between the melting of Arctic sea ice on one hand and faster warming in the region and changes to the northern hemisphere jet stream on the other, explaining why some weather systems appear to get «stuck in place» — to often - devastating effect.

Francis, who wasn't involved with either study, is one of the main proponents of an idea that by altering how much heat the ocean lets out, sea ice melt and Arctic warming can also change atmospheric circulation patterns, in particular by making the jet stream form larger peaks, or highs, and troughs, or lows.

There have been many primarily anthropogenic changes in the past, but the major jet stream changes caused by the retreat of the North American Ice Shield seems to be much more determinative for Holocene changes in Saharan rainfall.

4) A change in global weather patterns which I noticed as long ago as 2000 whereby the jet streams moved back towards the equator from the positions they adopted during the warming spell.

So jet stream positioning and consequent changes in solar input to the oceans could swing the ENSO phenomenon in favour of dominant El Nino or dominant La Nina subject additionally to possible modulation from internal oceanic effects.