Sentences with phrase «of the glacial periods into»

Not exact matches

Previous ocean sediment records suggest that, as the world slipped into the last glacial period, less carbon overall reached the sediments of the Southern Ocean, coinciding with declining atmospheric carbon dioxide.

The results of our recent study suggest that the Atlantic water never ceased to flow into the Nordic Seas during the glacial period,» says Mohamed Ezat, PhD at Centre for Arctic Gas Hydrate, Environment and Climate (CAGE) at UiT, The Arctic University of Norway.

This glacial meltwater lake was enclosed in ice and experienced a massive breach during this period, which emptied an enormous volume of water into the ocean,» explains Herrle.

...» Meltwater from glacial Lake Agassiz (southwest of Hudson Bay) draining catastrophically into the North Atlantic via Lake Superior and the St. Laurence seaway was once thought to have initiated ocean circulation changes leading to the Younger Dryas cold period.

These elements contribute to Platform «s grand achievement, the monumental experience of time: how periods in one's life seem to pass at a glacial pace until they inexplicably vanish, and one has slipped irreversibly into a new stage of being.

This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period.

It is therefore estimated that about 500 billion tons of carbon were emitted into the atmosphere at the end of the last glacial period.

During each glacial period the tropics became both cooler and drier, turning some areas of tropical rain forest into dry seasonal forest or savanna.

e.g. Where is the research examining the timing probabilities of global cooling into the next glacial period and the effort needed to prevent that?

The demonstration that D - O events are globally distributed and that they operated during previous glacial periods has led to extensive research into the relative hemispheric timing and causes of these events.

In climatology, abrupt changes traced in records of the Earth's past suggest the planet has regularly gone through tipping points, such as the sudden warm - ups that change glacial periods into deglaciations.

Yes, marked by but evidently not maintained by, as the climate invariably plunges into an extended glacial period ahead of any drop in CO2 levels.

Based on both historical records and our own knowledge of physics and climate, the earth should, by all measures, be slowly but inexorably sinking into another glacial period, as can be seen in the temperature record below.

Gerald Bond found evidence of cosmogenic isotope changes at each of a long series of warming followed by cooling events (he has able to track 25 events through current interglacial Holocene and into the last glacial period, at which point he reached the limit of the range of the proxy analysis technique) which indicates a solar magnetic cycle change caused the warming followed by cooling cycle.

Even back in the 70s, when there was some fear of eventual cooling bc the earth had been slowly cooling overall (as CO2 has slowly been reducing and going into the ground, until we suddenly reversed milllions and millions and millions of years in the process in an instant) and we are in an ice age and inter glacial period, papers predicting AGW outnumbered those worried about or predicting longer term cooling many times over.

Tree rings, coral skeletons, and glacial ice cores (Figure 3) are proxies for annual temperature records, while boreholes (holes drilled deep into Earth's crust) can show temperature shifts over longer periods of time.

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.

If water vapour feedback was positive then due to the increased evaporation spurred on by the original warming in the MWP there should have ensued a period of elevated temperatures for thousands of years until the cooling of the Holocene as we dip into the next glacial period overwhelmed the positive water vapour forcing.

Once a temperature threshold is breached, abrupt events follow due to amplifying feedbacks, even within a few years, examples being (1) freeze events which followed temperature peaks during past interglacial peaks due to influx of cold ice - melt water into the north Atlantic Ocean; (2) the Dansgaard — Oeschger warming events during the last glacial period; (3) the Younger dryas stadial freeze and the Laurentian stadial freeze.

Whether this change in cyclicity means that Earth is heading into still colder climates, or on its way out of this glacial period, I don't know.

The iron came in the form of dust blown into the ocean during the last glacial period 71,000 to 14,000 years ago.

The only «tipping point» the planet is on is tipping back into a full blown glacial period that will cover everything north of Washington, D.C. with a mile - thick sheet of ice.

Re # 5 As far as I understand it (drawing on my recollections of a lecture Hansen gave here at Yale a few weeks back), the actual net forcing associated with Milankovich cycles is relatively small, but it tends to trigger massive feedbacks (e.g. polar ice expanding, lowering albedo, cooling, expanding more) that «snowball» into a glacial period.