Sentences with phrase «poleward climate»

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.

Not exact matches

Widening of the tropics would also probably be associated with poleward movement of major extratropical climate zones due to changes in the position of jet streams, storm tracks, mean position of high and low pressure systems, and associated precipitation regimes.

«Changes in spawning timing and poleward migration of fish populations due to warmer ocean conditions or global climate change will negatively affect areas that were historically dependent on these fish, and change the food web structure of the areas that the fish move into with unforeseen consequences,» researchers wrote.

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.

Those patterns matched three rather dire climate model predictions: that storm tracks — the paths along which cyclones travel in the Northern and Southern hemispheres — would shift poleward; that subtropical dry regions would expand, and that the tops of the highest clouds would get even higher.

At the same time, tropical conditions are expanding poleward as a result of climate change, but at a slower rate than previously believed.

One of the trends in the study that is consistent with climate change science, in general, was the poleward migrations of these toxic algae, particularly in the North Atlantic.

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

As isotherms move up the mountainside and poleward, so does the climate zone in which a given species can survive.

Wild species have responded to climate change, with three - quarters of marine species shifting their ranges poleward as much as 1000 km [44], [103] and more than half of terrestrial species shifting ranges poleward as much as 600 km and upward as much as 400 m [104].

This paper is an assessment of the current climate poleward heat transport.

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.

So, I was curious about your recent paper and whether there was any discussion of changes in the THC poleward of the GIS shelf vs the data from the RAPID program line located at 26.5 N. With the decline in minimum extent and volume of sea - ice, one might expect to see more THC sinking into the Arctic Ocean, with consequences for both climate and weather.

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

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).

Arid subtropical climate zones are expanding poleward.

Both contribute to poleward energy transport and therefore Western Europe's relatively warm climate, but they are very different and conflating them contributes to public misunderstanding of the climate system.

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.

-- mostly land use changes Climate zones shifting polewards and uphill.

Landmark studies included Parmesan (1996), finding a latitude shift attributed to climate change in a North American butterfly (Edith's Checkerspot, photo (c) 2004 Jeffrey Pippen, by permission), and Parmesan et al. (1999) with «the first large - scale evidence of poleward shifts in entire species» ranges» from Europe.

But the broad long - term changes in the climate projected by models are for trade winds to weaken while mid-latitude westerly winds strengthen and move poleward.

If you have faith in the climate models and have any knowledge of what they do with reduced poleward ocean heat transport, then you are expecting cooling unless the AMOC should speed back up.

The YD shows strongly up in GRIP but is much less pronounced in the Antarctic cores because interrupting the AMOC turns poleward ocean heat transport on and off causing abrupt NH climate change.

Conversely, during low solar activity during the Little Ice Age, transport of warm water was reduced by 10 % and Arctic sea ice increased.17 Although it is not a situation I would ever hope for, if history repeats itself, then natural climate dynamics of the past suggest, the current drop in the sun's output will produce a similar cooler climate, and it will likely be detected first as a slow down in the poleward transport of ocean heat.22 Should we prepare for this possibility?

So the emphasis shifted to poleward shift of climate zones with particular emphasis on rain and desert belts moving such that agriculture is disrupted by great changes in precipitation patterns.

Models also show that a change in poleward ocean heat transport can create large changes in the climate.

Here, boreal ecosystems will have to race poleward in order to keep up with their climates.

For example, one of the clearest predicted ecological impacts of climate is a poleward shift in the ranges of plant and animal species.

As I have documented before Parmesan has «inaccurately» blamed CO2 warming for extinctions due to lost habitat from urban sprawl, hijacked conservation success to argue poleward movement of butterflies was caused by climate change, and blamed CO2 and extreme weather for a population extinction caused by logging while neighboring natural populations thrived.

Sev Clarke, a prominent inventor of green and climate restoration technologies describes the methane threat this way: «If we don't restore the ice, within 15 years methane and CO2 emissions from land and sea are likely to become so intense as to interfere substantially with normal cropping, to push land cultivation and population polewards, and to render much of the tropics unbearably hot during summer.

Put another way, a warmer climate will place greater demands on the atmosphere to transport heat upward and poleward, but this will be done more efficiently, in a smaller number of events that each accomplish more of the required transport.

Wild species have responded to climate change, with three - quarters of marine species shifting their ranges poleward as much as 1000 km [44], [103] and more than half of terrestrial species shifting ranges poleward as much as 600 km and upward as much as 400 m [104].

Climate models show the southwest U.S. drying in the 21st Century as the tropical Hadley circulation expands poleward.

But climate models show a consistent tendency for areas such as the southwest U.S. to dry out in the 21st Century as the sinking branch of the tropical Hadley circulation expands poleward and carries drier air down to the surface [8].

Theory and climate models indicate that the tropical overturning (Hadley) atmospheric circulation expands poleward with global warming [33].

As isotherms move up the mountainside and poleward, so does the climate zone in which a given species can survive.

IPCC climate change simulations diagnose that the Hadley circulation will weaken and expand polewards as a result of climate change.

The strong poleward atmospheric heat and moisture transport may be one reason why the West Antarctic and Peninsula climate appears to be more strongly coupled with regional sea ice concentration and extent anomalies than does the East Antarctic (e.g. Jacobs and Comiso 1997; Weatherly et al. 1991).

A poleward shift of the Hadley circulation by 5 degrees in two decades is not climate change?

This animation shows the poleward retreat of permafrost (thick black line), and the loss of soil carbon to the atmosphere (red), as the climate warms.

Bottom panels show the present - day, annually averaged sensible heat (c) and evaporation (d) fluxes poleward of 60N for a 16 - member CMIP5 climate model ensemble using the RCP8.5 scenario.

The poleward shift of the Southern Hemisphere middle latitude jetstream in response to increasing carbon dioxide is one of the most robust circulation responses found in climate change experiments, and is predicted to occur during all seasons (IPCC, 2007c).

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).

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.

Northern - latitude countries and high - altitude regions may become increasingly important for biodiversity and species conservation as the ranges of species distributions move poleward and upward in response to climate change (Berry et al., 2006).

xii) All regional climate changes are a result of movement in relation to the locally dominant air circulation systems which move cyclically poleward and equatorward.

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

This means that when the Hadley cell extends poleward as the climate warms, the contraction of the high clouds remains largely unbalanced and the surface of the southern hemisphere oceans warms.

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.

Due to climate change the Hadley Cell intensifies: More air moves up in the tropics (so more energy and rain in the Intertropical Convergance Zon (ITCZ — monsoon) and more air moves down in the subtropics, that also expand in poleward direction.