THERMAL MAXIMUM
; BIGHORN BASIN
; COMPENSATIONAL STACKING
; TIME SCALES
; CARBON
; RECORDS
; RELEASE
; PETM
; SEA
WOS学科分类:
Geology
WOS研究方向:
Geology
英文摘要:
Sediment routing systems (SRSs) are a critical element of the global response to ongoing climate change. However SRS response to climate forcing is complex, fragmentary, and obscured when viewed over short, human time scales (10(-1)-10(2) yr). Over long time scales (>10(2)-10(3) yr), the aggregated, system-wide response of SRSs to climate forcing can be gleaned with more confidence from the sedimentary record, but the nature and time scales of this aggregated response to abrupt climate change are still poorly understood. Here, we investigate the aggregated temporal response of a SRS in northern Spain to abrupt climate warming at the Paleocene-Eocene thermal maximum (PETM). Our results show that terrestrial sites in northern Spain record a temporal lag of 16.5 +/- 7.5 k.y. between the onset of the PETM, defined by an abrupt negative excursion in the delta C-13 profile, and the onset of coarse-grained deposition. Within the same SRS at a deep marine site 500 km to the west, we observe a temporal lag of 16.5 +/- 1.5 k.y. using an age model that is independent of that used for the terrestrial sites. These results suggest that the aggregated, system-wide response of SRSs to present-day global warming-if we take the PETM as an appropriate modern-day analogue-may persist for many millennia into the future.
1.Univ Liverpool, Dept Earth Ocean & Ecol Sci, Liverpool L69 3BX, Merseyside, England 2.Univ Paris Diderot, CNRS, Inst Phys Globe Paris, Sorbonne Paris Cite,UMR7154, 1 Rue Jussieu, F-75238 Paris 05, France 3.Univ Plymouth, Sch Geog Earth & Environm Sci, Plymouth PL4 8AA, Devon, England 4.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England
Recommended Citation:
Duller, Robert A.,Armitage, John J.,Manners, Hayley R.,et al. Delayed sedimentary response to abrupt climate change at the Paleocene-Eocene boundary, northern Spain[J]. GEOLOGY,2019-01-01,47(2):159-162