Content deleted Content added
No edit summary Tags: Mobile edit Mobile web edit |
ClueBot NG (talk | contribs) m Reverting possible vandalism by 60.250.185.120 to version by Bn. Report False Positive? Thanks, ClueBot NG. (4316223) (Bot) |
||
(46 intermediate revisions by 31 users not shown) | |||
Line 1:
{{
{{For|longer glacial periods|ice age}} {{For|film|Ice Age (2002 film)}}
A '''glacial period''' (alternatively '''glacial''' or '''glaciation''') is an interval of time (thousands of years) within an [[ice age]] that is marked by colder temperatures and [[glacier]] advances. [[Interglacial]]s, on the other hand, are periods of warmer climate between glacial periods. The [[Last Glacial Period]] ended about 15,000 years ago.<ref
name="Severinghaus1999">{{cite journal |author1=J. Severinghaus |author2=E. Brook | title=Abrupt Climate Change at the End of the Last Glacial Period Inferred from Trapped Air in Polar Ice | journal=Science | volume=286 | year=1999 | pages=930–4 | doi=10.1126/science.286.5441.930 | pmid=10542141 | issue=5441}}</ref> The [[Holocene]] is the current interglacial. A time with no glaciers on Earth is considered a [[Greenhouse and icehouse Earth|greenhouse climate state]].<ref>{{cite journal |
| year=1997
|author1=Christopher M. Fedo |author2=Grant M. Young |author3=H. Wayne Nesbitt | title= Paleoclimatic control on the composition of the Paleoproterozoic Serpent Formation, Huronian Supergroup, Canada: a greenhouse to icehouse transition
Line 15 ⟶ 16:
|volume=1 |issue=5 |pages=329 | doi= 10.1038/ngeo179
|bibcode=2008NatGe...1..329K}}</ref>
{{Wiktionary|glaciation}}▼
==Quaternary Period==
{{main|Quaternary glaciation|timeline of glaciation}}
[[File:Co2 glacial cycles 800k.png|320px|thumb|Glacial and [[interglacial]] cycles as represented by atmospheric [[carbon dioxide|CO<sub>2</sub>]], measured from ice core samples going back 800,000 years. The stage names are part of the North American and the European Alpine subdivisions. The correlation between both subdivisions is tentative.]]
Within the [[Quaternary]], which started
| last = Augustin | first = Laurent | title = Eight glacial cycles from an Antarctic ice core
| journal = Nature | volume = 429 | issue = 6992 | pages = 623–8
| year = 2004 | doi = 10.1038/nature02599
| pmid = 15190344|display-authors=etal| bibcode = 2004Natur.429..623A| doi-access = free}}</ref>
==Penultimate Glacial Period==
{{main|Penultimate Glacial Period}}
The Penultimate Glacial Period (PGP) is the glacial period that occurred before the [[Last Glacial Period]]. It began
==Last Glacial Period==
{{main|Last Glacial Period}}
The last glacial period was the most recent glacial period within the [[Quaternary glaciation]]
==Next glacial period==
{{
Since orbital variations are predictable,<ref name="Varadi2003">{{cite journal|author1=F. Varadi |author2=B. Runnegar |author3=M. Ghil |author-link3=Michael Ghil |title=Successive Refinements in Long-Term Integrations of Planetary Orbits |journal=The Astrophysical Journal |volume=592 |issue=1 |year=2003 |pages=620–630
Work by [[André Berger|Berger]] and Loutre suggests that the current warm climate may last another 50,000 years.<ref name="Berger2002">{{cite journal |vauthors=Berger A, Loutre MF | title=Climate: An exceptionally long interglacial ahead? | journal=Science | volume=297 | issue=5585 | year=2002 | pages=1287–8 | doi=10.1126/science.1076120 | pmid=12193773| s2cid=128923481 }}</ref> The amount of heat trapping (greenhouse) gases being emitted into the Earth's
==References==
{{
==External links==
▲{{Wiktionary|glaciation}}
{{Ice Ages}}
{{Authority control}}
{{DEFAULTSORT:Glacial Period}}
|