Sentences with phrase «poleward shift»

A wide range of other observations (such as reduced Arctic sea ice extent and increased ocean heat content) and indications from the natural world (such as poleward shifts of temperature - sensitive species of fish, mammals, insects, etc.) together provide incontrovertible evidence of planetary - scale warming.

Using mechanistic species distribution models, we find that rising temperatures this century will cause poleward shifts in species» thermal niches and a sharp decline in tropical phytoplankton diversity in the absence of an evolutionary response.

Meanwhile, increasing temperature and ocean warming may lead to the reduction of diatom production as well as cell size, inducing poleward shifts in the biogeographic distribution of diatoms.

There are also poleward shifts in the vast atmospheric patterns that control where rain falls.

Climate changes that began ~ 17,700 years ago included a sudden poleward shift in westerly winds encircling Antarctica with corresponding changes in sea ice extent, ocean circulation, and ventilation of the deep ocean.

After plugging their data into a species distribution model, they found poleward shifts in phytoplankton species» ranges, suggesting that as ocean waters warm, tropical species could be squeezed into smaller areas or disappear altogether.

Direct effects of increasing temperature on marine and freshwater ecosystems are already evident, with rapid poleward shifts in regions, such as the north - east Atlantic, where temperature change has been rapid (see Chapter 1).

According to the report, some of the small mammals have recently acquired new parasites, indicating poleward shifts of sub-Arctic faunas and increases in biodiversity.

Observations of the poleward branches of the Hadley Cells and the edge of the tropics show a robust poleward shift since about 1980, often referred to as a widening.

In particular, the forced poleward shift of the storm tracks is most significant over the North Atlantic, which highlights the importance of a regional perspective when considering Hadley Cell width variations.

I first noticed an increase in meridionality and a reversal of the earlier poleward shift as long ago as 2000.

At the same time, poleward shifts of westerly winds in the Southern Ocean reduced the region's ability to suck up CO2 as have mid-latitude droughts, which slowed the growth rate of forests and plants that capture carbon.

It is no surprise therefore that coastal marine species have shown some of the fastest responses to climate change in any system, with species - specific responses to thermal stress causing poleward shifts in biogeographic distributions towards cooler environments, as well as changes in phenology and regime shifts.

There they found changes in subtropical jet streams in both hemispheres and poleward shifts in storm paths.

Conservationists must adapt their management plans to that poleward shift, Pidgeon said.

«Regardless of the cause,» the authors note, «the poleward shift of the jet streams and the associated subtropical dry zone, if it continues, could have important societal implications.»

For example, the Gulf of Mexico has an east - west coastline that prevents a northerly or poleward shift of species in response to warming ocean waters,.

This study found that associated with a poleward shift of the subtropical jet in the North Pacific basin, the number of atmospheric river days increases much more significantly in Alaska during spring because both increased moisture and increased wind speed gang up to increase the frequency of atmospheric rivers.

Both processes act to tighten the relation between subpolar surface heat flux variability and MOC - variability, resulting in a poleward shift of the latter.

For example the poleward shift of trade winds in SH?

A common change is a poleward shift of the extra-tropical storm track regions.

There is evidence for long - term changes in the large - scale atmospheric circulation, such as a poleward shift and strengthening of the westerly winds.

Clearly a warmer troposphere would invigorate the hydrological cycle and push the jets poleward and AGW theory recognised that with the models supporting just such a poleward shift.

The poleward shift of the jets during a period of active sun was always inconsistent with AGW theory.

Indeed that poleward shift was supposed to be accompanied by a tropospheric hot spot as the enhanced upward energy flux was then constrained by extra GHGs so that the «surplus» energy was retained in the troposphere and thereby denied to the stratosphere which then cooled as per observations and despite the «normal» warming of the stratosphere that would otherwise have been expected from the highly active sun at the time.

«Poleward Shifts in Geographical Ranges of Butterfly Species Associated with Regional Warming.»

The models reflected that poleward shift but had no means of recognising it as a quantifiable change in the speed of upward energy transfer because they do not accurately model clouds, convection and the effect of the phase changes of water on a global basis.

If anything the poleward shift of the jets inevitably implies that more CO2 results in energy being propelled upward faster not slower and of course that would be consistent with the observation that more downward IR from any additional CO2 gets converted instantly into latent heat by enhanced evaporation to be released higher up when condensation occurs.

The tropical pipe becomes significantly more leaky, and greater transport into the lowermost stratosphere in the subtropics appears to be occurring, possibly in conjunction with a poleward shift in wave energy convergences.

Could it be that the poleward shift in the westerlies is also shifting the stirring of the heat into the ocean poleward as well?

The poleward shift of high - altitude clouds affects how much sunlight reaches Earth's surface because when they move, they reveal what's below.

This shift is correlated with a poleward shift of the jet stream in the inter-model spread (R = 0.56).

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.

There has been a poleward shift and intensification of the mid-latitude depressions in the North Atlantic from the 1950s to the early 2000s, which is linked to a poleward shift in Northern Hemisphere jet streams.