Sentences with phrase «abrupt glacial climate»

for article Abrupt glacial climate shifts controlled by ice sheet changes.

Braun, H., M. Christl, S. Rahmstorf, A. Ganopolski, A. Mangini, C. Kubatzki, K. Roth, and B. Kromer, 2005: Solar forcing of abrupt glacial climate change in a coupled climate system model.

[Response: I suspect another common confusion here: the abrupt glacial climate events (you mention the Younger Dryas, but there's also the Dansgaard - Oeschger events and Heinrich events) are probably not big changes in global mean temperature, and therefore do not need to be forced by any global mean forcing like CO2, nor tell us anything about the climate sensitivity to such a global forcing.

Not exact matches

The beginning and end of a glacial period are clearly times of global climate change, but there are also periods of abrupt change in climate patterns within those periods.

Similar fluctuations in OMZ intensity have occurred during the Dansgaard - Oeschger (D - O) events (millennial - scale abrupt climate oscillations) during the last glacial period (Cannariato and Kennett, 1999; Schmittner et al., 2007).

For the glacial period, comparisons to the Hulu Cave chronology demonstrated that WD2014 had an accuracy of better than 1 % of the age at three abrupt climate change events between 27 and 31ka.

Strong evidence from ocean sediment data and from modelling links abrupt climate changes during the last glacial period and glacial - interglacial transition to changes in the Atlantic Ocean circulation.

Arctic climatic extremes include 25 °C hyperthermal periods during the Paleocene - Eocene (56 — 46 million years ago, Ma), Quaternary glacial periods when thick ice shelves and sea ice cover rendered the Arctic Ocean nearly uninhabitable, seasonally sea - ice - free interglacials and abrupt climate reversals.

MECHANISMS OF ABRUPT CLIMATE CHANGE OF THE LAST GLACIAL PERIOD Amy C. Clement and Larry C. Peterson

For my part, I have studied the oceanographic and biological consequences of abrupt climate warming in the very recent glacial and interglacial climates of the Late Pleistocene (from 20,000 years ago to the present).

Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization.

The emergence of civilization during our current interglacial, the Holocene, has been attributed to the «relative climate quiescence» of this period relative to the massive, abrupt shifts in climate that characterized glacial periods in the form of D - O events.»

«During the last glacial / interglacial transition the Earth's climate underwent abrupt changes around 14.6 kyr ago.

---- Mayewski, 2016 http://meetingorganizer.copernicus.org/EGU2016/EGU2016-2567.pdf «The demonstration using Greenland ice cores that abrupt shifts in climate, Dansgaard - Oeschger (D - O) events, existed during the last glacial period has had a transformational impact on our understanding of climate change in the naturally forced world.

Few people have read paleo - climatology text books, are aware of the glacial / interglacial cycle, are aware that the paleoclimatic record has unequivocal evidence of cyclic gradual changes and cyclic abrupt climate events, are aware that the abrupt climate change events such as the abrupt termination of the last 22 interglacial periods lacks an explanation, are aware that all of the past interglacial periods are short (roughly 12,000 years) and that they have ended abruptly, and so on.

Heinrich events — abrupt periods of substantial iceberg discharge from the Northern Hemisphere ice sheets — occurred repeatedly throughout the last glacial period and had pronounced global effects on climate.

Müller, J. & Stein, R. High - resolution record of late glacial and deglacial sea ice changes in Fram Strait corroborates ice - ocean interactions during abrupt climate shifts.

He thinks that we can look to paleoclimate as evidence for abrupt climate change — and indeed we can — but the examples he has to use are those of abrupt change during deglaciation (YD) or during glacial climate (D - O; Heinrich; Bond).

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.

Most important was a widely noted paper by Ewing and William Donn, who were «stimulated by the observation that the change in climate which occurred at the close of the [most recent] glacial period was extremely abrupt.»

Pulsing of seafloor volcanic activity may feed back into climate cycles, possibly contributing to glacial / inter-glacial cycles, the abrupt end of ice ages, and dominance of the 100 kyr cycle.

Knowing that abrupt and frequent climate changes attend the end extreme interglacials, and accepting your premise that CO2 can either cause warming by whatever process you propose, or ameliorate the drop to the glacial state, applying the Precautionary Principle absolutely requires that we avoid any possibility of climate back - sliding over the next, at least, 4,000 years:

Our record shows that CO2 variations during the glacial period have a clear relationship with abrupt climate changes in the Northern Hemisphere that continues into the deglacial period.

Opening with a biographical sketch of Broecker — who, we learn, was born to an Evangelical suburban Chicago family, and initially drifted into his scientific vocation via a summer job in a radiocarbon dating lab — the book explains the currently - accepted Milankovitch theory of Ice Age glaciation; proceeds to an account of the Dr. David Keeling's measurements atmospheric CO2; continues with a summary of research work on glacial ice cores, sediments, and fossil pollen from around the world showing startlingly abrupt prehistoric climate changes; and moves on to the possible consequences of continued warming, closing with an account of the prospects of removing carbon dioxide from the atmosphere.

During glacial periods, the climate undergoes enormous and abrupt changes.

If it turned out that rapid climate change events are caused by comets, it would imply the climate system is far more stable than we thought, that abrupt climate change events are not part of the inherent variability of climate during glacial periods.

Specific interests include palaeoclimate of the tropical Andes, causes of late - glacial abrupt climate events, and the future evolution of tropical glaciers and hydrology.