Sentences with phrase «poleward expansion of»

Poleward expansion of mangroves is a threshold response to decreased frequency of extreme cold events

There is evidence in satellite and radiosonde data and in observational data for poleward expansion of the tropical circulation by as much as a few degrees of latitude since the 1970s [34]--[35], but natural variability may have contributed to that expansion [36].

Here we are talking about modification of atmospheric circulation — poleward expansion of the dry, descending portion of the Hadley Cell circulation by a few degrees, associated shifts in the jet stream.

There is evidence in satellite and radiosonde data and in observational data for poleward expansion of the tropical circulation by as much as a few degrees of latitude since the 1970s [34]--[35], but natural variability may have contributed to that expansion [36].

Climate models predict expanding Hadley Cells as the climate warms, meaning a poleward expansion of the subtropical desert zones.

A poleward expansion of the tropics is likely to bring even drier conditions to these heavily populated regions, but may bring increased moisture to other areas.

«We think, but have not yet been able to establish, that this is connected to independently observed poleward expansion of the Hadley circulation,» Emanuel says, referring to a large - scale pattern of global winds, which in recent years has also moved further poleward.

Not exact matches

While a 2009 estimate calculated that the tropical zone was expanding poleward at a rate of 222 to 533 kilometers every 25 years, the new report estimates that the expansion is occurring more slowly — between 138 and 277 kilometers per 25 years.

For example, they predicted the expansion of the Hadley cells, the poleward movement of storm tracks, the rising of the tropopause, the rising of the effective radiating altitude, the circulation of aerosols in the atmosphere, the modelling of the transmission of radiation through the atmosphere, the clear sky super greenhouse effect that results from increased water vapor in the tropics, the near constancy of relative humidity, and polar amplification, the cooling of the stratosphere while the troposphere warmed.

On global vs. local, how about the global model prediction of a deepening and widening of the tropical atmospheric circulation, which leads to the Hadley cell expansion and the projection of the dry zones expanding polewards.

I guess I would feel better about this kind of juxtaposition if the expansion of the low - productivity zones described here were primarily poleward.

On the one hand, models do pretty well at capturing the poleward expansion in the Southern hemisphere but only if they include the effects of the Antarctic ozone hole!

I think it would be great if you did focus on the atmospheric poleward expansion and some of its implications in another article.

Scientists say the record drought is due in part to the expansion of the Hadley Cell — the atmospheric regions on both sides of the equator that circulates warm tropical air poleward — which is known climate change signal.

However, there is also the expansion of the Hadley Cells where water vapor from tropical ocean evaporation rises, water in the form of rain falls out as the air cools with increased altitude, then dry air descends at poleward edge of the cells in the dry subtropics.

Numerous recent studies based on both observations and model simulations indicate that reduced Barents - Kara sea ice in late fall favors a strengthened and northwestward expansion of the Siberian high, increased poleward heat flux, weakened polar vortex, and ultimately a negative AO.

Extratropical cyclones have three stages of expansion: the developing stage, in which an undulating wave develops along the front; the mature stage, in which sinking cold air sweeps equatorward west of the surface low - pressure centre and ascending warm air moves poleward east of the cyclone; and the occluded stage, in which the warm air is entrained within and moved above the polar air and becomes separated from the source region of the tropical air.

But in the southern hemisphere, the poleward contraction of the high clouds is balanced by an expansion of the already extensive low cloud decks, which ends up blocking more sunlight and producing a small surface cooling.

The Hadley cell shows a clear signal of poleward expansion, while poleward movement is present but less clear in the jet stream and mid-latitude storm tracks.

What they discovered was that the poleward shift of the clouds, which occurs in both the Northern and Southern Hemispheres, connected more strongly with the expansion of the tropics, defined by the general circulation Hadley cell, than with the movement of the jets.

One projected (and possibly already detected) result of global warming is an extension of the poleward arm of the Hadley cell that will cause an expansion of the area under the drying influence of subtropical high pressure (2, 20).

So you need to look at a wide range of indicators all of which have independent sources of error (for instance, errors in satellites are not likely to be correlated with errors in weather stations or ocean buoys) and see if your understanding matches all of the different aspects that you expect from the theory (stratospheric cooling, ocean warming, Arctic melt, poleward and upward expansion of biomes etc...).

The expansion of the tropical belt that we attribute to black carbon and tropospheric ozone in our work is consistent with the poleward displacement of precipitation seen in these models.