Sentences with phrase «equatorward at»

However, it must be borne in mind that the MOC can also include shallower, wind - driven overturning cells such as occur in the upper ocean in the tropics and subtropics, in which warm (light) waters moving poleward are transformed to slightly denser waters and subducted equatorward at deeper levels.

Thus if the two mid latitude jets move equatorward at the same time as the ITCZ moves closer to the equator the combined effect on global albedo and the amount of solar energy able to penetrate the oceans will be substantial and would dwarf the other proposed effects on albedo from changes in cosmic ray intensity generating changes in cloud totals as per Svensmark and from suggested changes caused in upper cloud quantities by changes in atmospheric chemistry involving ozone which various other climate sceptics propose.

In the subtropical high - pressure belts near latitudes 30 ° N and 30 ° S (the horse latitudes), air descends and causes the trade winds to blow westward and equatorward at the Earth's surface.

Not exact matches

At the base of all this is the simple failure of anyone to note the start of the equatorward shift in the jets around 2000.

So for AGW theory to have been correct we would have to have seen that hot spot at the top of the troposphere and the presence of that hotspot would have prevented the jets moving poleward, indeed it should have sent them equatorward instead because it would have had the same effect as a reduction of the height of the tropopause and an enhancement of the intensity of the tropopause.

In subtropical regions, its source waters are typically surface waters at higher latitudes that have subducted and moved equatorward.

• surface upwelling (of cold / cool water) at / off western continental margins, driven by Coriolis effect on equatorward currents;

The waters that underlie the near - surface subtropical waters have freshened due to equatorward circulation of the freshened subpolar surface waters; in particular, the fresh intermediate water layer (at ~ 1,000 m) in the SH has freshened in both the Atlantic and Pacific Oceans.

In contrast, warm fronts are well defined at the equatorward surface position of polar air as it retreats on the eastern sides of extratropical cyclones.

The cold water at the poles sinks, flows equatorwards across the ocean deeps.

At high latitudes the upwelling brings air rich in the heavy molecular constituents N2 and O2 to high altitudes and the circulation carries this molecular - rich air to midlatitudes, especially in the summer hemisphere, where the mean meridional circulation is already equatorward.

Whereas for quiet conditions there is a general upwelling in the summer hemisphere flow toward the winter hemisphere at higher levels, and downwelling in the winter hemisphere, the storm - time heating adds a polar upwelling and equatorward flow in both hemispheres.

The increased equatorward wind at middle latitudes tends to push the ionosphere higher up along magnetic field lines, where the loss rate is lower.

The slow diffusion equatorward of the the NA is not that slow, and seems to happen at narrow localized spots near topographic features, mid ocean ridges, continental margins, islands etc, due to tidal internal wave breaking and other related mechanisms which remain unclear.

For the longest time it was thought that the MOC was «thermohaline», or sometimes referred to as horizontal convection, driven by water sinking at the North Atlantic polar regions and gradually diffusing up in various equatorward regions, which seems pretty inefficient.

If you look at everything equatorward of 60S and 60N then the observed temperatures have warmed much more slowly than the mean.

The ITCZ wandere with the seasons, but the poleward shift amplitude is mainly solar cycle induced: thus during high solar activity, the ITCZ and the jet stream position is more polewards, at low activity more equatorward.

GMT drops initially at glacial inception in response to decreased summer radiation at high northern latitudes that would have led to equatorward extension of sea ice and snow cover with associated cooling from increased albedo.

Most LGM proxy data suggest that the tropical oceans were colder by about 2 °C than at present, and that the frontal zones in the SH and NH were shifted equatorward (Kucera et al., 2005), even though large differences are found between temperature estimates from the different proxies in the North Atlantic.

The air circulation systems move latitudinally poleward or equatorward depending on whether there is net cooling or warming of the air at a gradual if variable rate all the time and climate shifts in any given location depend mainly on the changing position of that location in relation to the latitudinal position of the major air circulation systems.

Stephen Wilde says: April 28, 2010 at 6:40 am Nor that a feature of warm periods is a poleward jet and a feature of cold periods is an equatorward jet.

If a more active sun were to warm the stratosphere I would expect to see a negative AO from an intensified inversion at the tropopause with more equatorward jets and not a positive AO with more poleward jets.

In two hemisphere integrations, the water above the abyssal thermocline may be either «intermediate» water from the same hemisphere as the channel, or «deep» water from the opposing hemisphere, depending on whether the densest water from the opposing hemisphere is denser than the surface water at the equatorward edge of the channel.

The transition to superrotation occurs under conditions in which equatorward propagating Rossby waves generated by baroclinic instability at intermediate and high latitudes are suppressed, which will occur when the deformation radius exceeds the planetary radius.