Sentences with phrase «wave atmospheric pattern»
«They're looking at the chaos of the long - wave atmospheric pattern and it's really hard to see why modest additional forcing in the Arctic can overwhelm all the energy that's in that chaotic pattern.»
http://www.climatecentral.org/ Not exact matches
Knowing what to look for Previous studies investigating heat wave prediction have looked for patterns in the tropics, but this research was interesting because the predictive factor is an atmospheric phenomenon that occurs in the middle latitudes, Schubert said.
Computer model finds historical patterns In order to learn that this atmospheric pattern exists in advance of heat waves, Teng and her co-authors had to look far back in the history of heat waves — from before weather records were kept.
Coumou has examined the waviness of the jet stream in previous work and has suggested that its large twists and turns, slow - moving undulations called Rossby waves, promote atmospheric «blocking» — a kind of stagnation of weather patterns that he says can exacerbate heat waves.
That excess tropical energy fueled rising air in a process known as convection, creating rain, releasing heat, and forming large - scale atmospheric patterns called Rossby waves.
«Time - reversed» light waves can be used to improve laser - beam quality, compensate for atmospheric turbulence, track a moving satellite, encode and decode messages and compare image patterns
Scientists have fingerprinted a distinctive atmospheric wave pattern high above the Northern Hemisphere that can foreshadow the emergence of summertime heat waves in the United States more than two weeks in advance.
The recurring wave pattern of intense rain and thunderstorms, followed by a dry phase as the force moves across the cooler Pacific Ocean occurs every 30 - 60 days, giving this atmospheric wave its unique stamp on the climate.
By using simulation modeling, the researchers found that the heat wave was the result of abnormal atmospheric patterns
When polar air dipping southward collides with rising warm tropical air, the meet - up causes a powerful atmospheric wave with rollercoaster - like patterns that propagate eastward around the globe.
They are the superposition of a background field and the effects of the upper atmospheric wave pattern.
On a grander scale, I've heard talk of an open Hudson Bay this fall influencing [atmospheric] wave patterns across the North Atlantic into Europe.
«Analysis of observations indicate that this heat wave was mainly due to internal atmospheric dynamical processes that produced and maintained a strong and long - lived blocking event, and that similar atmospheric patterns have occurred with prior heat waves in this region.
Petoukhov et al. (34) proposed a common mechanism for generating persistent high - amplitude quasibarotropic planetary - scale wave patterns of the NH midlatitude atmospheric circulation with zonal wave numbers m = 6, 7, and 8 that can explain a number of the major NH summer extremes over the 1980 — 2011 period (34, 35).
In the northern hemisphere 500 - hPa atmospheric flow the shift manifested itself as a collapse of a persistent wave - 3 anomaly pattern and the emergence of a strong wave - 2 pattern.»
Forests can affect the global climate system by altering large - scale patterns in atmospheric waves and jet streams, a mechanism termed «teleconnection patterns» (e.g., [12, 15 — 19]-RRB-.
However, using National Centers for Environmental Prediction − National Center for Atmospheric Research (NCEP - NCAR) reanalysis data (41), Petoukhov et al. (34) showed that, during a number of recent NH extremes in July and August, certain persistent high - amplitude atmospheric wave patterns with barotropic vertical structure evolved, to which the quasistationary component of midlatitude barotropic free waves with zonal wave numbers k ≈ 6 − 8 made an exceptionally large contribution.
And then in January of this year there was another publication, that came up with a perhaps better convincing route to explain how indeed Arctic depressions can lead to anticyclonal weather systems later on than atmospheric wave patterns: snow cover.
The authors however believe a positive AO and NAO leads to atmospheric wave train patterns which may have delayed opposite effects — leading to a negative AO and NAO later on in the season — and that is where especially associated European cold spells would originate from.
This very unusual atmospheric configuration — in which the large - scale atmospheric wave pattern appears to be largely «stuck» in place — has been characterized by a seemingly ever - present West Coast ridge and a similarly stubborn trough over central and eastern United States (commonly referred to in media coverage as the «Polar Vortex,» though this terminology is arguably problematic).
Because the longwave atmospheric weather patterns (Rossby waves) have a scale of several thousand kilometers, it is not unusual for the temperature of a region the size of the United States to be substantially warmer or co lder during a single season than the zonal mean temperature.
On a related note, there has been a considerable amount of recent interest focused upon a possible increase in the frequency and / or intensity of high - amplitude atmospheric wave patterns (and associated extreme weather events) due to enhanced warming of the Arctic over the past 2 - 3 decades.
The heat wave was due primarily to a natural phenomenon called an atmospheric «blocking pattern», in which a strong high pressure system developed and remained stationary over western Russian, keeping summer storms and cool air from sweeping through the region and leading to the extreme hot and dry conditions.
For example, it is said that the Moscow heat wave was caused by an extreme atmospheric «blocking» situation, or the Texas heat wave was caused by La Niña ocean temperature patterns,» the researchers write.
While the blocking pattern associated with the 2010 event was unusually intense and persistent, its major features were similar to atmospheric patterns associated with prior extreme heat wave events in the region since 1880, the researchers found.