Sentences with phrase «poleward temperature»

Losing ice, reducing the poleward temperature gradient, and warming the entire climate system should contribute to increasing the likelihood of anomalous storms.

What we * do * suggest is that the weakened poleward temperature gradient owing to the rapidly warming Arctic relative to mid-latitudes (Arctic amplification) should increase the north - south component of the upper - level flow, making highly wavy jet - stream patterns (like the one this winter) more likely.

Not exact matches

Ocean temperatures between 82 and 86 degrees Fahrenheit seem to be «ideal for the genesis of tropical cyclones,» Emanuel says, «and as that belt migrates poleward, which surely it must as the whole ocean warms, the tropical cyclone genesis regions might just move with it.

We present a synthesis of decadally resolved proxy temperature records from poleward of 60 ° N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age.

The issue is that the APF is heading poleward, and if global temperatures continue to rise as expected, the front is likely eventually to move out of the range of many foraging king penguins, the research suggests.

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.

Despite large year - to - year variability of temperature, decadal averages reveal isotherms (lines of a given average temperature) moving poleward at a typical rate of the order of 100 km / decade in the past three decades [101], although the range shifts for specific species follow more complex patterns [102].

Changes here have a long term effect, affecting the strength of the north - ward horizontal flow of the Atlantic's upper warm layer, thereby altering the oceanic poleward heat transport and the distribution of sea surface temperature (SST — AMO), the presumed source of the (climate) natural variability.

And no, there is no huge plunge in tropical or global surface air temperatures when the ocean circulation spins up because there is a near - compensating decrease in poleward heat transport via the atmospheric circulation.

There tend to be a sharp temperature drop poleward of the polar fronts, and it is no coincidence that this is the same regions where the storm tracks lie.

The flow of energy between different circulation patterns is dependent on fram of reference (Eulerian vs transformed Eulerian); The Ferrel Cell is the result of some average upward motion poleward of some average downward motion with return flows at lower and higher altitudes, superimposed on the average temperature distribution.

Of course, there are plenty of negative feedbacks as well (the increase in long wave radiation as temperatures rise or the reduction in atmospheric poleward heat flux as the equator - to - pole gradient decreases) and these (in the end) are dominant (having kept Earth's climate somewhere between boiling and freezing for about 4.5 billion years and counting).

An important one is additional poleward energy transport, but contributions from local high - latitude water vapour, cloud and temperature feedbacks have also been found.

Temperatures there are strongly dependent upon poleward transport of heat.

Satellite temperature measurements show similar warming; most glaciers are shrinking; lakes and rivers are freezing later and thawing sooner; oceans are expanding; plant and animal communities are mostly moving poleward.

The average temperatures poleward of 60Lats then are still going to be cool and the rest of the world is not going to warm by much.

Ozone depletion in the late twentieth century was the primary driver of the observed poleward shift of the jet during summer, which has been linked to changes in tropospheric and surface temperatures, clouds and cloud radiative effects, and precipitation at both middle and low latitudes.

and the area of the earth poleward from the 60 latitudes constitutes ~; 13.5 % of the globe, then this area is responsible for 0.135 x 3.0 = 0.4 C degrees contributed to global temperature anomaly.

The Arctic surface air temperature is strongly effected by atmospheric forcing and atmospheric energy circulated poleward which creates the Arctic Winter Warming and Sudden Stratospheric warming events.

The poleward spread of this and other pathogens is expected to continue as winter temperatures warm.

Take solar vs. GHGs: 1.5 W / m2 solar change (TOA) over a solar cycle has a large effect in the stratosphere: During a solar cycle, the largest change is in the short waves: 10 % more during high solar activity: that affects ozone building, the temperature in the stratosphere and increases the polewards flow in the stratosphere.

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).

Despite large year - to - year variability of temperature, decadal averages reveal isotherms (lines of a given average temperature) moving poleward at a typical rate of the order of 100 km / decade in the past three decades [101], although the range shifts for specific species follow more complex patterns [102].

An active sun gives more zonal jets and / or more poleward climate zones with less global cloudiness and more energy into the oceans for gradually strengthening El Ninos as compared to La Ninas and a gradual rise in global tropospheric temperatures.

Figure 3 compares the GISS analysis of global temperature change with the case in which the polar regions, specifically regions poleward of 64 degrees latitude, are excluded from the analysis.

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.

If it makes it to the surface, it would amplify the temperature of the poleward flowing current from the equator surely?

If surface temperatures were correlated positively with latitude, and temperature increased, one would expect a poleward shift of oceanic biota.

Recent meta - analyses indicate that on average, examined terrestrial species have been moving poleward about 1.76 km / yr (reported as 17.6 + 2.9 km / decade), apparently keeping pace with regional temperature change, although species range shifts to higher elevations have on average lagged behind climate (Chen et al., 2011).

This bend in the jet draws warm air poleward and cool air southward without greatly affecting the global mean temperature.

The thing is that as regards the sequence of observed events leading to changes in tropospheric temperature trends and the cyclical poleward and equatorward shifts in the air circulation systems the NCM is pretty robust.

This trend is shifting climate zones and isotherms (lines of a given average temperature) poleward, at a rate of about 50 - 60 kilometers

The air circulation systems in both hemispheres move poleward and the ITCZ moves further north of the equator as the speed of the hydrological cycle increases due to the cooler stratosphere increasing the temperature differential between stratosphere and surface.

A robust feature of the response of climate models to increases in atmospheric concentrations of greenhouse gases is the poleward retreat of terrestrial snow and sea ice, and the polar amplification of increases in lower - tropospheric temperature.

Several mechanisms have been hypothesized to explain this reduced temperature gradient, including increased poleward heat transport, decreased ice albedo, and changes in cloud cover (Fedorov et al., 2006).

However, the mechanism of increased poleward heat transport can not be the only physical mechanism driving the reduced temperature gradient because it is in fact the surface temperature gradient that ultimately drives the flux of heat poleward.

Most of the observed decline in the latitudinal temperature gradient during the Pliocene can be explained by increased poleward heat transport.

back to the horizontal gradient, if the upper tropospheric thermal wind shear increase is greater than the decrease of the lower layer, then maybe the overall baroclinic instability would be stronger — but currently the upper level eddy circulations do not transport much heat poleward, so would the structure of cyclones change so that a deeper layer of air is involved in the thermal advection, compensating for a weaker temperature gradient?

We find that an increase in poleward heat transport by the tropical ocean results in a warming of the extra-tropics, relatively little change in the tropical temperatures, moistening of the subtropical dry zones, and partial but incomplete compensation of the planetary - scale energy transport by the atmosphere.

Additionally, there will also be changes in the poleward energy transport, which is simulated to increase with rising temperature [15].

This is one of the simplest models for the pole - to - equator surface temperature distribution and ice latitude on a spherical planet in the presence of poleward heat transport.

Forecasters at the Joint Typhoon Warning Center noted on March 13, «As the cyclone tracks more poleward (south), it will encounter increasing vertical wind shear and cooling sea surface temperatures that will slowly erode it.

We have analyzed the data (and also the dat poleward of 49N / S with particular interest in the land surface temperatures through the 1930 - 1970 period.

Through baroclinic instability, the potential energy associated with temperature gradients is converted into the energy in atmospheric eddies that dominate the heat and angular momentum transport poleward of the subsiding region of the Hadley cell.