I'll add that most prior glaciations and interstadials have been linked to known causes -- orbital mechanics (Milamkovic cycles), continental drift, and major biotic events (terrestrial vegetation did alot to reduce the amount of atmospheric CO2 one darned long time ago). ❋ Unknown (2009)
Even more important is our inability to explain or quantify the natural variability of climate system - Ice Ages and interstadials, Little Ice Age, PDO and so on. ❋ Unknown (2009)
These temperature increases occurred during glacial terminations and at the onset of D-O interstadials. ❋ Unknown (2009)
The Quaternary Period (the last 1.6 My) has been characterized by periodic climatic variations during which the global climate system has switched between interglacial and glacial stages, with further subdivision into stadials (shorter cold periods) and interstadials (shorter mild episodes). ❋ Unknown (2009)
During the Pleistocene Epoch, each cycle was characterized by the relatively warm interstadials becoming progressively cooler. ❋ Unknown (2009)
These interstadials lasted for varying periods of time, usually a few centuries to about 2000 years, before equally rapid cooling returned conditions to their previous state. ❋ Unknown (2009)
The evidence from high-resolution deep sea cores from the North Atlantic [45] suggests that during at least the past 30000 years, interstadials tended to occur at the warmer points of a background North Atlantic temperature cycle that had a periodicity of approximately 1,500 years. ❋ Unknown (2009)
Also about the discovery about the large isotope excursions known as Dansgaard Oeschger interstadials the last within 60,000 years, as well as the Bolling Allerod events 15-13,000 years ago and the transition to the Preboreal 11600 years ago, which were interpreted as large temperature changes “ten degrees within a decade”. ❋ Unknown (2006)
About 20 such intervals (interstadials) lasting between 500 and 2000 years occurred during the last glacial period (Dansgaard et al 1993). ❋ Unknown (2005)
The most prominent of these interstadials may be associated with the sedimentary Heinrich layers interpreted as reflecting massive iceberg discharge from Northern Hemisphere ice sheets Bond et al 1993; Majewski et al 1994; Bond and Lotti 1995 see Figure 3.22. ❋ Unknown (2005)
During the last glacial period, rapid changes were also felt over at least parts of continents as suggested by recently obtained records for Western Europe, North America and China…This suggests that the interstadials were at least hemispheric in their extent. ❋ Unknown (2005)
(0. 110-0.001 Myr) interstadials were characterized by closed forests or forest steppes and summer temperatures > ❋ Unknown (2008)
Moreover, Greenland interstadials lasting more than 2000 years have weaker and smoother counterparts in Antarctica (Bender et al 1994…)), Keigwin et al (1994) also report evidence from terrestrial paleoclimate data suggesting that the short duration event since about 100,000 years ago were at least hemispheric, possibly global in extent. ❋ Unknown (2005)
1992: Irregular glacial interstadials recorded in a new ❋ Kevin Grandia (2010)
