Sentences with phrase «changes during the last ice age»

The preconditions which gave rise to rapid temperature changes during the last ice age do not exist today, but sudden climate changes can not be excluded in future.»

Precise interpolar phasing of abrupt climate change during the last ice age, Nature, 520, 661 - 665, doi: 10.1038 / nature14401.

Precise interpolar phasing of abrupt climate change during the last ice age.

The ubiquitous character of certain events further confirms their importance: «the Younger Dryas and a large number of abrupt changes during the last ice age called Dansgaard / Oeschger events (23 abrupt changes into a climate of near - modern warmth and out again, during the last glacial period) have been corroborated in multiple ice cores from Greenland, Antarctica and tropical mountains, marine sediments from the North Atlantic Ocean, the tropical Atlantic, eastern Pacific, and Indian Oceans, and from various records on land.

Not exact matches

For example, the ice ages during the last several million years — and the warmer periods in between — appear to have been triggered by no more than a different seasonal and latitudinal distribution of the solar energy absorbed by the Earth, not by a change in output from the sun.

«Detailed chemical measurements in Antarctic ice cores show that massive, halogen - rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread climate change in the Southern Hemisphere during the end of the last ice age and the start of increasing global greenhouse gas concentrations,» according to McConnell, who leads DRI's ultra-trace chemical ice core analytical laboratory.

Guliya is thought to be the best record of midlatitude climate during the last ice age, and its ice may well turn out to be a Rosetta Stone for interpreting how Asia responds to a changing climate.

New research shows that small fluctuations in the sizes of ice sheets during the last ice age were enough to trigger abrupt climate change.

The study, by an international team of scientists led by the University of Cambridge, examined how changes in ocean currents in the Atlantic Ocean were related to climate conditions in the northern hemisphere during the last ice age, by examining data from ice cores and fossilised plankton shells.

More recent studies, with much more precise correlation between ice cores and global temperature records, have shown that temperature and CO2 changed synchronously in Antarctica during the end of the last ice age, and globally CO2 rose slightly before global temperatures.

Severe climate changes during the last ice - age could have been caused by random chaotic variations on Earth and not governed by external periodic influences from the Sun.

In the short video above, Dr. Alley explains how some patterns in the changes that occur during Earth's ice ages and warm intervals (like the last 11,000 years) prove that greenhouse gases exert a warming effect.

As during the last ice age when sea levels were around 100 m lower icebergs were grounding at 44s, these would have calved from similar size as during the 2001 event (160kmx30km) hardly evidence of change.

During the last ice age, seals also experienced far more rapid changes than they are experiencing now or that are predicted in the future.

Climate change was dramatic even during the last ice age, says Professor Tine Rasmussen.

Modern Homo sapiens had probably been in Africa during the last warm period in the ice ages, which started 130,000 years ago (this is when you see the first use of fireplaces as a centrally - located feature of encampments, suggesting some change in social organization).

«All 18 periods of significant climate changes found during the last 7,500 years were entirely caused by corresponding quasi-bicentennial variations of [total solar irradiance] together with the subsequent feedback effects, which always control and totally determine cyclic mechanism of climatic changes from global warming to Little Ice Age.»

Secondly, we have lots of palaeoclimatic evidence for abrupt changes in the AMOC, which are leading candidates to explain Dansgaard - Oeschger transitions during the last ice age, and the cold snap 8,200 years ago.

But new research has shown evidence of a 200 - year lag between climate events in Greenland and Antarctica during the last ice age, and it could possibly help shed light on the consequences of climate change in the future.

The ISM exhibited rapid changes in variability during the last ice age (64) and the Holocene (65), with an increased strength during recent centuries consistent with Northern Hemisphere warming (66).

Here, we argue that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist.

And, another way to look at temperature changes is this: During the last ice age, when there was like a mile of ice on top of where I currently am, the global temperature was only about 5 - 7 C colder than it is today.

Well - documented climate changes during the history of Earth, especially the changes between the last major ice age (20,000 years ago) and the current warm period, imply that the climate sensitivity is near the 3 °C value.

A barrage of comets could most certainly change climate trends and during a different time period like the last ice age could certainly have a different degree of climate sensitivity.

Argues that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist

Similarly, Demezhko and Gornostaeva (2015) found that the heat energy change in the deep oceans during the climate transition from the last ice age to this current interglacial occurred «2 - 3 thousands of years» before the increases in surface temperature and CO2, and that «the increase of carbon dioxide may be a consequence [rather than a cause] of temperature increasing».