Constructing a stacked benthic d18O record
Cobertura |
MEDIAN LATITUDE: 19.696048 * MEDIAN LONGITUDE: -60.404724 * SOUTH-BOUND LATITUDE: -3.095000 * WEST-BOUND LONGITUDE: -139.401500 * NORTH-BOUND LATITUDE: 57.512667 * EAST-BOUND LONGITUDE: -14.702267 * DATE/TIME START: 1979-08-16T00:00:00 * DATE/TIME END: 1995-07-19T00:00:00 |
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Data(s) |
26/03/2002
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Resumo |
Composite stacks were constructed by superimposing 6 to 13 benthic foraminiferal d18O records covering the period 0-850 ka. An initial timescale for each core was established using radioisotopic age control points and assuming constant sedimentation rates between these points. The average of these records is our 13-core "untuned" stack. Next, we matched the 41 kyr component of each record individually to variations in Earth's obliquity. Four of the 13 records produced timescales that were inconsistent with one or more of the known radioisotopic ages. The nine remaining cores were averaged to create a "minimally tuned" stack. Six of the minimally tuned cores were assembled into a "tropical" stack. For each stack we estimated the uncertainty envelope from the standard deviation of the constituents. Spectral analysis of the three stacks indicates that benthic d18O is dominated by a 100 kyr oscillation that has a narrow spectral peak. The contribution of precession to the total variance is small when compared to prior results from planktic stacks. |
Formato |
application/zip, 10 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.844944 doi:10.1594/PANGAEA.844944 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Karner, Daniel B; Levine, Jonathan; Medeiros, Brian P; Muller, Richard A (2002): Constructing a stacked benthic d18O record. Paleoceanography, 17(3), 2-1-2-16, doi:10.1029/2001PA000667 |
Palavras-Chave | #1 sigma; Age; AGE; Age model; Ageprof dat des; Ageprofile Datum Description; Benthic foraminifera; d18O stack; d18O std dev; Deep Sea Drilling Project; delta 18O, stacked; delta 18O, standard deviation; Depth; DEPTH, sediment/rock; DSDP; Event; Minimally tuned stack, benthic foraminifera; Ocean Drilling Program; ODP; stacked; Tropical stack, benthic foraminifera |
Tipo |
Dataset |