FN Archimer Export Format
PT J
TI Antarctic climate signature in the Greenland ice core record
BT 
AF BARKER, Stephen
   KNORR, Gregor
AS 1:1;2:1;
FF 1:;2:;
C1 Cardiff Univ, Sch Earth Ocean & Planetary Sci, Cardiff CF10 3YE, Wales.
C2 UNIV CARDIFF, UK
IF 9.598
TC 35
UR https://archimer.ifremer.fr/doc/00235/34643/33010.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
DE ;dansgaard-Oeschger events;rapid climate change;GISP2 dust record
AB A numerical algorithm is applied to the Greenland Ice Sheet Project 2 (GISP2) dust record from Greenland to remove the abrupt changes in dust flux associated with the Dansgaard-Oeschger (D-O) oscillations of the last glacial period. The procedure is based on the assumption that the rapid changes in dust are associated with large-scale changes in atmospheric transport and implies that D-O oscillations (in terms of their atmospheric imprint) are more symmetric in form than can be inferred from Greenland temperature records. After removal of the abrupt shifts the residual, dejumped dust record is found to match Antarctic climate variability with a temporal lag of several hundred years. It is argued that such variability may reflect changes in the source region of Greenland dust (thought to be the deserts of eastern Asia). Other records from this region and more globally also reveal Antarctic-style variability and suggest that this signal is globally pervasive. This provides the potential basis for suggesting a more important role for gradual changes in triggering more abrupt transitions in the climate system.
PY 2007
PD OCT
SO Proceedings Of The National Academy Of Sciences Of The United States Of America
SN 0027-8424
PU Natl Acad Sciences
VL 104
IS 44
UT 000250638400010
BP 17278
EP 17282
DI 10.1073/pnas.0708494104
ID 34643
ER

EF