Sentences with phrase «by changes in the jet streams»

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

-- The record melt of the Greenland ice sheet was facilitated by changes in the jet stream... — http://www.redorbit.com/news/science/1112875668/jet-stream-caused-greenland-ice-sheet-melt-2012-061713/ «According to University of Sheffield research, published in the International Journal of Climatology, unusual Jet Stream changes were behind record surface melt of the Greenland Ice Sheet last summer.»

Not exact matches

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

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.

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.

«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.

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...

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.

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.

I have now realised that the global albedo changes necessary and the changes in solar energy input to the oceans can be explained by the latitudinal shifts (beyond normal seasonal variation) of all the air circulation systems and in particular the net latitudinal positions of the three main cloud bands namely the two generated by the mid latitude jet streams plus the Inter Tropical Convergence Zone (ITCZ).

Longer flight times caused by changes to the jet stream could keep airliners aloft longer, resulting in more exhaust emissions of CO2 per flight, researchers suggest.

In a warming world hot and cold waves are both generated by changes in the polar jet streaIn a warming world hot and cold waves are both generated by changes in the polar jet streain the polar jet stream.