Open AccessSanta Barbara basin study extends global climate record
Author(s) -
Hopkins Sarah,
Kennett James,
Nicholson Craig,
Pak Dorothy,
Sorlien Christopher,
Behl Richard,
Normark William,
Sliter Ray,
Hill Tessa,
Schimmelmann Arndt,
Cannariato Kevin
Publication year - 2006
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 - 10.1029/2006eo210001
Subject(s) - abrupt climate change , global cooling , stadial , glacial period , paleoclimatology , ice core , climatology , climate change , geology , climate state , global warming , ice sheet , climate oscillation , coring , oceanography , physical geography , effects of global warming , paleontology , geography , mechanical engineering , drilling , engineering
A fundamental goal of Earth science is to understand the remarkable instability of late Quaternary global climate prior to the beginning of the Holocene, about 11,000 years ago. This unusual climate behavior was characterized by millennial‐scale climate oscillations on suborbital timescales, and a distinctive ‘sawtooth’ pattern of very abrupt glacial and stadial terminations (within decades) followed by more gradual global cooling [e.g., Dansgaard et al ., 1993; Hendy and Kennett , 1999]. The fact that both major (glacial) and minor (stadial) cooling periods in Earth's climate were terminated by similar abrupt warming episodes suggests a common mechanism driving such rapid changes in global climate. Understanding the causes of this instability is crucial given developing concerns about global warming, yet knowledge about this climate behavior has been essentially confined to the last 150,000 years or so, owing to the absence of available sequences of sufficient age and chronological resolution. The high‐resolution paleoclimate record from the Greenland ice cores is limited to about 110 thousand years ago (ka),and although Antarctic ice cores now extend back to more than 740 ka [ European Project for Ice Coring in Antarctica , 2004], these latter cores primarily provide information about high‐latitude conditions at much lower resolution than is required to address abrupt climate change.