Sentences with phrase «polar region when»

The small «convective» spots appear mainly in a region from about 55 degrees N to the pole, and were not seen in the south polar region when it was imaged by Keck at similar wavelengths in 2003.

Tajeddine believes an asteroid may have struck the moon's current south polar region when it was closer to the equator in the past.

Not exact matches

When it came to the crust we decided to form the oceans and the land masses as well as the polar regions.

On Earth, the brightest auroras (the high - altitude glows often called the northern and southern lights) are generated when electrons in outer space near Earth are accelerated by large electrical potentials, or voltages, along the lines in our planet's magnetic field and slam into gas molecules in the upper atmosphere above polar regions.

Radar signals were routinely reflected off rough, angled features such as sand dunes, cliffs and rocks, but when radar reached Titan's polar regions, regular signals ceased.

Not much grows in the icy polar regions, but for the fern - like clusters of ice crystals called frost flowers this is the perfect environment, especially when it's still and dry.

This IPY is the first such multinational comprehensive look at the polar regions since 1958, when the International Geophysical Year (IGY) wrapped up.

With the gravity - mapping mission now over, if all goes according to schedule, the probes» Thelma - and - Louise moment will occur at approximately 5:28 p.m. EST on Monday, 17 December, when the craft slam into a 2 - kilometer - tall mountain in the northern polar regions of the moon, NASA announced in a press conference today.

Titan's north polar region, which is bejeweled with sprawling hydrocarbon seas and lakes, was dark when Cassini first arrived at the Saturn system in 2004.

The annual Arctic Science Conference will, when opportune, combine with a meeting of oneof the societies, institutions, unions or other organizations of scientists of the United States or of foreign counterparts of the Association concerned with the polar regions.

ESA's original mission to measure changes in ice sheets and sea ice in Earth's polar regions failed on October 8, 2005, when a software problem caused the commercial launch rocket to fail.

The image, captured when Mars was just 50 million miles from Earth — a mere stone's throw away in the cosmic scale of things — shows russet Martian deserts pockmarked with craters and bright frosty polar caps shrouded, in some regions, in a thin haze of clouds.

When low - temperature ice covers the Arctic Ocean there is little evaporation or sublimation and the polar regions are quite dry in terms of precipitation, comparable to the amount found in mid-latitude deserts.

When Cassini first encountered Titan, it observed a large outburst of methane cumulus clouds over Titan's south polar region.

The study, led by researchers at The University of Texas at Austin Jackson School of Geosciences, addresses why the Earth has fluctuated from periods when the planet was covered in ice to times when even the polar regions were ice - free.

Climate alarmists have long anticipated Earth's polar regions to symbolize the proverbial canary in the coal mine when it comes to witnessing the impacts of CO2 - induced climate change.

When the new set of images is compared to Hubble pictures taken in 1994, the northern polar region of Pluto seems to have grown brighter, while the southern hemisphere has become darker.

Some really interesting recent weather events in the High Arctic have shown me the reality of a warmer polar region, snow flakes do not melt in an ocean -1.5 C cold, and ice does not form when its -6 C outside.

Over all, open water has spread in the Arctic this summer nearly as much as it did last summer, when polar experts said the ice cap shrank far more than had been measured since satellites started scanning the region 30 years ago — and probably more than it had shrunk in a century or more.

When the polar regions cool the amount of sea ice increases.

(Keep in mind that almost all Arctic sea ice researchers add a big caveat when talking of an «ice - free Arctic Ocean,» noting that a big region of thick floes north and west of Greenland will almost surely persist in summers through this century, which is one reason some scientists have proposed targeting polar bear conservation efforts there.)

When cold, dense water of the polar regions sinks and flows beneath warmer ocean water.

The range of ocean remaining frozen over the northern polar region reached its minimum extent for 2009 on September 12, when it covered 1.97 million square miles (5.1 million square km), and now appears to be growing again as the Arctic starts its annual cool - down, the National Snow and Ice Data Center reported.

In the year with strong wave energy, by contrast, the lower stratospheric warming in July and August leads to reduced ozone losses throughout the Southern Hemisphere spring, when the sunlight that powers ozone depletion chemistry returns to the polar regions.

In fact, Arctic ice growth in the second half of September was rapid and there is now more ice than there was at this date in 2007 and 2012 (when polar bears in those regions considered most at risk did not die off in droves).

«The question is again being discussed whether recent and long - continued observations do not point to the advent of a second glacial period, when the countries now basking in the fostering warmth of a tropical sun will ultimately give way to the perennial frost and snow of the polar regions.»

And it is known that the southern polar regions «see - saws» with the northern — so when the north polar is on the up cycle — the south polar in on a downer (Bob Tisdale's graph of the southern ocean SSTs shows this clearly for the «global warming» period of 1980 - 2005 — and the Peninsula Region just catches a flow - in from warmer seas to the north).

When the AO index is negative there tends to be low pressure in the polar region, weaker zonal winds, and greater movement of frigid polar air into middle latitudes.

When the AO index is positive surface pressure is high in the polar region.

Bottom line: Barents Sea polar bears are loyal to this region because the eastern portion has the habitat they require to thrive even when sea ice cover in the western portion essentially disappears for thousands of years at a time.

When atmospheric mass moves from polar regions it is usually the Antarctic that provides, but quite frequently the Arctic contributes.

And we also don't get say 15 C increase in temperature in Tropics when it is a 30 C world, nor does the poles become much colder when we in colder world of 10 C, rather it's expansion area of polar region climate and contraction of tropical regions.

The high and persistent temperatures this fall are particularly extraordinary, scientists said, because the region has already plunged into «polar night,» the time of year when the sun no longer rises over the North Pole.

Interesting that when you include the polar regions, that 2005 and 2010 were substantially warmer than «warmest year» 2014.

They found that open oceans are much less efficient than sea ice when it comes to emitting in the far - infrared region of the spectrum, a previously unknown phenomenon that is likely contributing to the warming of the polar climate.

Or seems this occurs when Earth has colder conditions of large ice caps on north America and / or when there is enlarged polar regions.

The latitudinal temperature gradient in summer is much smaller, thus providing less drive for exchange of air masses between middle latitudes and polar regions — and when exchange occurs the effect on temperature is less than that caused by a winter «polar express» of Arctic (or Antarctic) air delivered to middle latitudes.

It is also a significant place when it comes to global climate change — it is the polar regions of the planet that are experiencing the biggest rises in temperature and changes to the landscape, threatening the very survival of the polar bear.