Open AccessResearchers look for links among paleoclimate events
Author(s) -
Vernal Anne,
HillaireMarcel Claude,
Grafenstein Uli,
Barber Donny
Publication year - 1997
Publication title -
eos, transactions american geophysical union
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 86
eISSN - 2324-9250
pISSN - 0096-3941
DOI - 10.1029/97eo00166
Subject(s) - paleoclimatology , ice core , geology , climatology , physical geography , before present , little ice age , oceanography , climate change , holocene , geography
Several peculiar features appear in climate‐related records at about 8000 years BP and are occasionally referred to as the 8‐ka events. For example, paleolake data from intertropical Africa show a drop in water levels [e.g., Gasse and Van Campo , 1994], and the Antarctic Byrd ice‐core record reveals a decrease in atmospheric CO 2 of about 40 ppm [ Neftel et al. , 1988]. Similarly, detailed paleoceanographic studies in the northwest North Atlantic reveal a decrease in primary productivity and burial rates of biogenic carbonates at precisely 8000 years BP [ Hillaire‐Marcel et al. , 1994], and the oxygen and deuterium values in Greenland ice show at least one sharp and short‐lived decrease [ Johnsen et al. , 1992].