Sentences with phrase «scale atmospheric wave»

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).

Many of the planetary scale atmospheric waves are expressed as thermal variations on the background atmosphere.

Not exact matches

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

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.

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.

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.

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.

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).

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-.

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.

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.