Sentences with phrase «large atmospheric waves»

«It is likely the banded structure and large atmospheric waves we found in brown dwarfs will also be common in giant exoplanets,» Apai said.

Not exact matches

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.

As the balloon rises in altitude, the change in atmospheric pressure on the balloon also changes, and the pressure waves are larger than infrasound 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.

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.

Asteroid impacts, especially the large ones, can excite atmospheric waves capable of revealing information about the internal structures of the planets that probably can not be obtained in any other way.

These simulations helped them to understand the forces causing shifts in the jet that increase the survival of large - scale weather events, technically known as atmospheric mid-latitude synoptic waves.

In the tropical Pacific, the distance from Indonesia to South America and the way tropical winds push warm water west combine to allow special waves to travel along the equator and are amplified by the atmospheric wind response to produce large fluctuations in temperatures (up to 3 degrees Celsius) in the Eastern Pacific that last for months.

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.

θ = potential temperature, which is conserved for dry adiabatic processes and is a useful vertical coordinate for examining various fluid mechanical processes (like Rossby waves) when the atmospheric lapse rate is stable (for dry convection)(which is generally true on a large scale away from the boundary layer).

Recognition has grown in the scientific community that droughts, heat - waves and other catastrophic weather and climate events are not random in occurrence, nor are they caused only by variations in remote ocean temperatures altering large - scale atmospheric circulation.

Black et al. (15) analyzed basic factors that likely contributed to the summer 2003 European heat wave, examining large - scale atmospheric flow, regional heat budget at the top of the atmosphere, and sea surface temperature.

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.

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.

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).

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.

In the tropical Pacific, the distance from Indonesia to South America and the way tropical winds push warm water west combine to allow special waves to travel along the equator and are amplified by the atmospheric wind response to produce large fluctuations in temperatures (up to 3 degrees Celsius) in the Eastern Pacific that last for months.

Stable and accurate solutions to the Navier Stokes equations for large scale atmospheric flows are obtained by filtering sound waves (the hydrostatic assumption) and filtering high frequency unresolved gravity waves.

The winds flow from east to west and then swap to moving from west to east, completing a cycle roughly every 28 months as atmospheric waves ripple up from large - scale convection in the tropics.