Sentences with phrase «of zonal flow»

How do you create a model that accommodates years with various combinations of zonal flow or meridional flow?

The reversed direction of zonal flow grinds eddies carrying heat and particles, and confinement is improved.

Not exact matches

Zonal flows take the stripe structure that flows in the opposite direction to each other, and these flows are known to perform an important role in the suppression of the turbulence.

Thus instead of a strong zonal wind that keeps cold polar air locked in the Arctic, there is a tendency for a less zonal flow and thus more cold air outbreaks to middle latitudes.

Poleward eddy momentum fluxes interact with the zonal mean flow to sustain latitudinal displacements of the mid-latitude westerlies (Limpasuvan and Hartmann, 2000; Rashid and Simmonds, 2004, 2005).

The discovery by the Juno spacecraft that Jupiter's gravity field is north — south asymmetric5 and the determination of its non-zero odd gravitational harmonics J3, J5, J7 and J9 demonstrates that the observed zonal cloud flow must persist to a depth of about 3,000 kilometres from the cloud tops6.

MD wave fades moving deeper into SH due to lack of land mass & land impediment to antarctic circumpolar (southern ocean) flow --(need midlatitude zonal land - sea contrast for meridional deflection of westerlies = differential land - sea equator - pole column - integrated - temperature gradient response to solar forcing, easily measured using a simple wavelet tachometer, which detects externally governed universal constraint)

The sea ice in the Siberian Arctic is peaking, its effect on the meridional temperature gradient strong, promoting increased zonal flow of large - scale winds, which advect warm air and moisture over the Eurasian continent from the Atlantic and disrupt vertical stratification near the surface and promote high cloudiness, both of which lead to increasing temperatures — greatest at low altitudes and high latitudes.

Below are animations of the zonal wind and vorticity at the level in the model that corresponds roughly to the estimated level of the cloud tops from which the observed flows are inferred.

Unfortunately, there is actually quite good model agreement on the overall pattern over the East Pacific through the end of the month: the huge ridge over the Eastern Pacific is expected to persist and perhaps grow even more, continuing the extraordinarily dry pattern over California but allowing for occasionally large swings in temperature as a very cold airmass over Canada is occasionally able to spill westward in weak or even slightly retrogressive (east to west) zonal flow.

The zonal velocity is shown at the level in the model that corresponds roughly to the estimated level of the cloud tops from which the observed flow is inferred (0.75 bar).

We find robust relationships among seasonal and regional patterns of weaker poleward thickness gradients, weaker zonal upper - level winds, and a more meridional flow direction.

In our paper, we have dealt with the zonally averaged zonal winds as the mean flow and excluded from our consideration packets of quasistationary planetary waves trapped in predominantly meridional elongated waveguides, specifically those originating in the tropics.

Poleward and / or more zonal jetstreams mean that the troposphere is bit warmer as the rate of energy flow through the troposphere increases.

A rapidly warming Arctic leads to a tendency to less zonal (westerly) flow and more blocking (or easterly events), which has an impact on western continents of more cold air in the winter and perhaps more continental droughts in the summer.

Now, as the global trend swings from warming to cooling these winds switched from zonal to meridional flow causing dramatic increases in variability of temperature and precipitation.

This is important because climate change is reflected most in these latitudes as the Circumpolar vortex shifts between Zonal and Meridional flow and the amplitude of the Rossby Waves vary.

The Atlantic Meridional Overturning Circulation (AMOC)-- characterized by warm surface waters flowing northward and cold deep waters flowing southward throughout the Atlantic basin — is defined as the zonal integral of the northward mass flux at a particular latitude.

Insofar as the New Zealand landmass interrupts what would otherwise be a mainly zonal flow, it effectively splits it, such that, in general terms, the water flows in a clockwise direction around the northern half and anticlockwise around the southern half of New Zealand, and the merged flow continues eastward.

Two effects are identified that each contribute to a slower eastward progression of Rossby waves in the upper - level flow: 1) weakened zonal winds, and 2) increased wave amplitude.

Persistence of waves can not only occur with high pressure, but also e.g. with low pressure systems (potentially leading to flooding) or with persistent zonal flow (supporting the occurrence of extreme cyclones).

In a new study published in the Journal of Climate, the Community Earth System Model Large Ensemble (CESM - LENS) of simulations is used to explore how various characteristics of the mid-latitude atmospheric circulation (zonal flow, synoptic blockings, jet stream meanders) evolve along the course of the 21st century under the RCP8.5 scenario of anthropogenic emissions.

Figure 2.2 on page 9 shows contour plots of the perturbation of the steady state zonal flow (not shown in published manuscript).

Most of the time, winds in the atmosphere flow from west to east; this is called «zonal flow» and it's responsible for our everyday weather.