But that's an Antarctica average based on air samples that were each gradually trapped in
the ice over thousands of years.
Within the disk, tiny dust grains accumulate layers of
ice over thousands of years.
The ice sheet is made up of annual layers of snow that never melted and became compacted into
ice over thousands of years.
Not exact matches
In the aftermath of the worst
ice - storm Toronto has ever had (but let's not forget hard - hit smaller municipalities in Ontario, Quebec and New Brunswick), a virtual army of heroes has emerged — hydro workers, on 12 - hour shifts around the clock
over the Christmas period, steadily restoring power to hundreds of
thousands of «customers.»
Over hundreds or
thousands of years, vast
ice sheets can melt away, further decreasing the planet's reflectivity.
Over hundreds of
thousands of years, the Neandertal lineage developed successfully in western Eurasia and survived severe fluctuations between colder and warmer climactic cycles of the
Ice Age.
John Stewart said, «During the
Ice Age just
over 40
thousand years ago in the north of England Neanderthals were living in an environment which included extinct animals like woolly mammoths, woolly rhinos and cave hyenas as well as the more familiar horses and reindeer.
Mountains of water
ice tower
thousands of meters
over fields of frozen nitrogen and methane.
The bottom few feet of
ice is probably cluttered with such debris, picked up by the glacier as it slid
over the hidden face of Antarctica for
thousands of years.
There have been
thousands of small earthquakes
over the past week at Bardarbunga, which is Iceland's largest volcanic system and located under the
ice cap of a glacier.
This may also help explain the cyclical rise and fall of
ice ages
over hundreds of
thousands of years.
Humanity has now raised global CO2 levels by more than the rise from roughly 180 to 260 ppm at the end of the last
ice age, albeit in a few hundred years rather than
over more than a few
thousand years.
Ice keeps a record of environmental changes as it accumulates
over thousands of years, so the longer the core, the better.
As the region warms due to increased greenhouse - gas emissions,
ice melts, reducing Antarctica's elevation
over centuries or
thousands of years.
Researchers also think it's possible that
over thousands of years, the diamonds slowly sink through the planets»
ice layers and assemble into a thick layer around the core.
What they found was that local destabilization of the Amundsen Sea region of West Antarctica ultimately causes the entire
ice sheet to fall into the ocean
over several centuries to several
thousands of years, gradually adding 3 meters to global sea levels, they report online today in the Proceedings of the National Academy of Sciences.
Earth's climate naturally varies between times of warming and periods of extreme cooling (
ice ages)
over thousands of years.
Although that is unlikely to happen for many
thousands of years, the
ice sheet has increasingly lost mass
over the last two decades, and the glaciers that serve as its outlet to the sea are accelerating.
Romania's Scarisoara
Ice Cave holds the world's oldest cave glacier, built up by water dripping into the cavern
over thousands of years.
The team suspects that some of the pockets in these gullies might have held water in various forms in the recent past,
over the last few hundreds of
thousands of years, periodically harboring snow and
ice when the conditions were right.
Severinghaus discovered that xenon and krypton are well preserved in
ice cores, which provides the temperature information that can then be used by scientists studying many other aspects of the earth's oceans and atmosphere
over hundreds of
thousands of years.
These attempted to determine how
ice thicknesses, temperatures and gas - hydrate stability likely changed
over tens of
thousands of years.
Every year that it snows in Antarctica, the new snow layer weighs on the previous layer, compacting
over hundreds or
thousands of years to eventually form layers of
ice.
Meanwhile,
over thousands of years feedback and re-feedback CO2 enters the atmosphere, and we're at a supercharged version of emerging from an
ice age.
That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several
thousand years, with rapid change of
ice sheet mass balance
over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].
With multi coloured hundreds and
thousands scattered
over pastel pink melting
ice cream this adorable crop is perfect for festival fun and hazy holidays.
Living on the Chukotka Peninsulafor
over a
thousand years (on the Western most edge of Siberia; where the Russian side of the
ice bridge that once linked Asia and North America lies), the Chukchi found the Husky useful as sled - dogs, watch dogs and for herding reindeer.
«As the
ice sheet in Greenland melts
over thousands of years and becomes lower, the temperature will increase because of the elevation loss.
However, atmospheric CO2 content plays an important internal feedback role.Orbital - scale variability in CO2 concentrations
over the last several hundred
thousand years covaries (Figure 5.3) with variability in proxy records including reconstructions of global
ice volume (Lisiecki and Raymo, 2005), climatic conditions in central Asia (Prokopenko et al., 2006), tropical (Herbert et al., 2010) and Southern Ocean SST (Pahnke et al., 2003; Lang and Wolff, 2011), Antarctic temperature (Parrenin et al., 2013), deep - ocean temperature (Elder eld et al., 2010), biogeochemical conditions in the Northet al., 2008).
It features some of the most dramatic and rapid climate shifts in Earth's history, as well as tenacious scientists braving the hostile
ice and snows of Greenland and Antarctica for years on end to bring home that most precious material: kilometre - long cores of ancient
ice, dating back
over a hundred
thousand years.
This gradual removal of CO2 from the atmosphere reduces the overall greenhouse effect and thus slowly draws the entire planet into an
ice age, driving further
ice sheet expansion
over tens of
thousands of years (a complete
ice age cycle is around 100,000 years)
The postulated and very likely cause of the
ice ages are variations of the earths orbit around the sun, and variations of the inclination of the earth's axis in relation to this orbit, which cause variations of the sun's heating of different parts of the earth at different times of the year (mainly the northern hemisphere)
over long periods of time (tens of
thousands of years).
Over all, the loss of the West Antarctic
ice from warming is appearing «more likely a definite thing to worry about on a
thousand - year time scale but not a hundred years,» Dr. Pollard said.
That means that the
ice is at an altitude of
over ten
thousand feet where the temperature is much cooler than a mere six or so feet as in the north.
Over tens of
thousands of years, Milankovich cycles have increased and decreased seasonality, leading to periods of greater
ice cover which in turn reflect away sunlight, cooling the planet.
The lakes are prone to floods, typically caused when the mountain glaciers that feed them shed a chunk of
ice and rock, forcing
thousands of gallons
over the banks.
Scientists can tell from basic astronomical theory how Milankovich cycles have evolved
over the past hundreds of
thousands of years.The
ice - sheets affect the climate by reflecting sunlight.
An
ice core - formed by compaction of previous snowfalls - constitutes a historical record of the local climate and atmosphere stretching back
over thousands of years.
Glacial cycles (
ice ages) are set in motion by (1) periodic wobbles in the tilt of the Earth's rotation, (2) changes in the tilt of its axis, and (3) the shape of its orbit occurring
over tens of
thousands of years.
Over thousands of years, the layers of snow build up, forming a flowing sheet of
ice thousands of feet thick and tens to
thousands of miles across.
Over thousands of years, the layers of snow pile up into thick masses of
ice, growing thicker and denser as the weight of new snow and
ice layers compresses the older layers.
If we hindcast them a couple tens of
thousands of years do they show us a mile of
ice over the Great Lakes?
The differences are (1) that you can not afford spatio - temporal resolution of weather models to simulate
thousand years forward, and (2) in weather model you don't care if your prediction will blow up in 100 years yielding Venus condition or
Ice Ball, you just stop the computer after a week of simulated time, and start
over.
They know that the highly regular
ice ages are caused primarily not by CO2 increases and decreases in the atmosphere but by well known wobbles in the earth's rotation —
over tens of
thousands of years.
A process that occurs
over thousands of years after the
ice melts.
Ivanovic et al., 2017 http://onlinelibrary.wiley.com/doi/10.1002/2016GL071849/full «During the Last Glacial Maximum 26 — 19
thousand years ago (ka), a vast
ice sheet stretched
over North America [Clark et al., 2009].
Definition of faith warmer - one who believes proponents of AGW do not have to archieve their data and expect all others to believe them - one who believes AGW is causing tree ring width to both increase and decrease - one who believes in weather, yes weather, teleconnections
over thousands of kilometres - one who believes AGW is causing
ice increase and decrease on greenland.
Thousands of years ago, during the height of the ancient Greek and Roman empires, lead emissions from sources such as the mining and smelting of lead - silver ores in Europe drifted with the winds
over the ocean to Greenland — a distance of more than 2800 miles (4600 km)- and settled onto the
ice.
That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several
thousand years, with rapid change of
ice sheet mass balance
over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].
This can be inferred from
ice core measurements, which show a near constant atmospheric concentration of CO2
over the last several
thousand years prior to the Industrial Era.