Sentences with phrase «atmospheric waves with»

Scientists at McMurdo Station detected unusual atmospheric waves with an altitude between 30 to 115 kilometers (20 to 70 miles) above Antarctica in 2011.

These ice shelf vibrations would likely also produce atmospheric waves with a vertical wavelength of 20 to 30 kilometers (12 to 18 miles), another feature of the observed waves.

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.

Not exact matches

Kadri says the results may help scientists connect interactions between not only surface and deep ocean waters, but also with the atmospheric forces that affect surface waves.

«But on top of that, changes in atmospheric circulation can favor particular weather conditions associated with heat waves.»

It is common for atmospheric waves to grow in amplitude with height as the air becomes thinner.

(Gravity waves, common atmospheric ripples on Earth that result from air trying to regain its vertical balance, should not be confused with gravitational waves, cosmological ripples in spacetime.)

Along the East Coast, where the «green wave» of spring leaves sprouting from maples, oaks and poplars historically has rolled from Miami to Maine in 75 days, atmospheric scientists with Princeton University predict the wave could take just 59 days by the end of the century.

The size of these atmospheric waves makes them easy to observe with radar and Lidar, a radar - like system using laser light to scan the atmosphere.

The new research solves this mystery by connecting the atmospheric waves to vibrations of the Ross Ice Shelf — the largest ice shelf in the world with an area of almost half a million square kilometers (188,000 miles), roughly the size of France.

The two examples shown here are small waves — atmospheric circulation is driven by large - scale waves, with wavelengths that are hundreds or thousands of kilometers.

In combinations with numerical simulations, these observations can help constrain the properties of the waves, as well as the background states for wave propagation, for instance, the atmospheric stratification.

Using atmospheric data from the last 35 years, study author Daniel Horton, a Stanford University postdoc, and his colleagues found that persistent areas of high pressure in certain places were linked with extreme heat waves in Europe, western Asia and eastern North America.

In July, the Office of Naval Research made a survey in the waters off Virginia Beach, Virginia using ScanEagle UAVs to study the effect of oceanic and atmospheric changes on radar and radio waves, with the aim of improving military communications and the ability of radar to detect hostile craft..

Rockstar made waves with a subtle buildup to the reveal of this Red Dead sequel, dropping hints and images that culminated with a beautiful, atmospheric teaser trailer.

The ambiance of upper - atmospheric diffusion is especially palpable in such installations from the 1990s as St. Elmo's Breath (1992), and in a recent series of wide and tall glass panels animated with dissolving waves of color.

The use a «seeding» method to randomly generate small vortices analogous to «short wave» tropical disturbances in the real world (the tracks they take are defined in terms of the background atmospheric circulation of the model combined with the so - called «self advection» of the TC itself).

The underlying mechanistic relationship involves the phenomenon of quasi-resonant amplification (QRA) of synoptic - scale waves with that wavenumber range becoming trapped within an effective mid-latitude atmospheric waveguide.

That happens to coincide with the region where the largest waves in the atmosphere (called Rossby waves) propagate, so therefore snow cover variability can have a direct impact and those waves, which dominate the large - scale atmospheric circulation.

Abstract: «Persistent episodes of extreme weather in the Northern Hemisphere summer have been shown to be associated with the presence of high - amplitude quasi-stationary atmospheric Rossby waves within a particular wavelength range (zonal wavenumber 6 — 8).

The work is an estimate of the global average based on a single - column, time - average model of the atmosphere and surface (with some approximations — e.g. the surface is not truly a perfect blackbody in the LW (long - wave) portion of the spectrum (the wavelengths dominated by terrestrial / atmospheric emission, as opposed to SW radiation, dominated by solar radiation), but it can give you a pretty good idea of things (fig 1 shows a spectrum of radiation to space); there is also some comparison to actual measurements.

They found that the asperitas formation is likely to be closely associated with atmospheric gravity waves.

Since 1998 ECMWF has been running a coupled forecasting system where the atmospheric component of the Integrated Forecasting System (IFS) communicates with the wave model (WAM) through exchange of the Charnock parameter which determines the roughness of the sea surface (Janssen, 2004).

A lot of interesting weather phenomena are associated with various types of atmospheric waves.

«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.

QRA can be regarded as an extension of the Haurwitz - type mechanism (42) of a strong increase in the amplitude of the midlatitude atmospheric barotropic wave system response to stationary external barotropic thermal forcing, with a spatial frequency m approaching the natural stationary spatial frequency k of the wave system, to the case of external barotropic thermal and orographic forcing under a latitude - dependent u ¯ and an integer m over the midlatitude belt on the spherical Earth.

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).

The corresponding working quasilinear wave equation for the barotropic azonal stream function Ψm ′ of the forced waves with m = 6, 7, and 8 (m waves) with nonzero right - hand side (forcing + eddy friction) yields (34) u˜ ∂ ∂ x (∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2) + β˜ ∂ Ψm ′ ∂ x = 2Ω sin ϕ cos2 ϕT˜u˜ ∂ Tm ′ ∂ x − 2Ω sin ϕcos2 ϕHκu˜ ∂ hor, m ∂ x − (kha2 + kzH2)(∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2), [S3] where x = aλ and y = a ln -LSB-(1 + sin ϕ) / cos ϕ] are the coordinates of the Mercator projection of Earth's sphere, with λ as the longitude, H is the characteristic value of the atmospheric density vertical scale, T˜ is a constant reference temperature at the EBL, Tm ′ is the m component of azonal temperature at this level, u˜ = u ¯ / cos ϕ, κ is the ratio of the zonally averaged module of the geostrophic wind at the top of the PBL to that at the EBL (53), hor, m is the m component of the large - scale orography height, and kh and kz are the horizontal and vertical eddy diffusion coefficients.

As regards the meridional wave numbers of the above - mentioned dominant partial waves of the external forcing with a given m = 6, 7, and 8, the observational and model results of the 1D Fourier transform of the midtroposphere extratropical atmospheric fields attest that the characteristic values of lm for these waves (see, e.g., refs.

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.

Whereas CO2 concentration is quasi-steadily increasing, other drivers change their trends with time even to opposite (solar and geomagnetic activity, stratospheric ozone), or change trends with location (Earth's main magnetic field), or with latitude (geomagnetic activity), or are largely unknown but probably unstable in space and time (atmospheric winds and waves).

Because the breakdown of the stratospheric polar vortex is driven by atmospheric waves, which are related to short - term weather fluctuations, we can't forecast these events more than 10 - 15 days in advance with much skill.

By using an idealized heating to force a comprehensive atmospheric model, the large negative anomalous latent heating associated with the observed deficit in central tropical Pacific rainfall is shown to be mainly responsible for the global quasi-stationary waves in the upper troposphere.

Furthermore, ocean and atmospheric scientists are interested in how storm - driven waves and surges combine with tides to affect the potential for coastal flooding and the rate of coastal erosion.

Wang et al. (2014) find that tropical West Pacific SST warm anomalies (associated with the West Pacific Warm Pool that acts as a precursor of El Niño) played a leading role in causing the strength and longevity of the Triple R by generating a recurring series of atmospheric «Rossby waves» that propagated from west to east across the Pacific Basin.

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.

The deadly Russian heat wave of 2010 was due to a natural atmospheric phenomenon often associated with weather extremes, according to a new NOAA study.

Further, millimeter waves are pretty short and «would probably interact with atmospheric moisture or dust, so there would be attenuation issues,» Jude pointed out.