|
|
|
|
|
| Peterson, Carlye D.; Lisiecki, Lorraine E.; Stern, Joseph V.. |
| Terrestrial carbon storage is dramatically decreased during glacial periods due to cold temperatures, increased aridity, and the presence of large ice sheets on land. Most of the carbon released by the terrestrial biosphere is stored in the ocean, where the light isotopic signature of terrestrial carbon is observed as a 0.32-0.7 parts per thousand depletion in benthic foraminiferal delta C-13. The wide range in estimated delta C-13 change results from the use of different subsets of benthic delta C-13 data and different methods of weighting the mean delta C-13 by volume. We present a more precise estimate of glacial-interglacial delta C-13 change of marine dissolved inorganic carbon using benthic Cibicidoides spp. delta C-13 records from 480 core sites... |
| Tipo: Text |
|
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00290/40131/39115.pdf |
| |
|
|
| Stern, Joseph V.; Lisiecki, Lorraine E.. |
| Benthic O-18 changes are often assumed to be globally synchronous, but studies comparing 2-9 radiocarbon-dated records over the most recent deglaciation (Termination 1) have proposed differences in the timing of benthic O-18 change between the Atlantic and Pacific, intermediate and deep, and North and South Atlantic. Because of the relatively small number of records used in these previous studies, it has remained unclear whether these differences are local or regional in scale. Here we present seven regional benthic O-18 stacks for 0-40 kyr B.P. that include 252 records with independent regional age models constrained by 852 planktonic foraminiferal C-14 dates from 61 of these cores. We find a 4000 year difference between the earliest termination onset in... |
| Tipo: Text |
Palavras-chave: Termination 1; Regional stacks; Benthic delta O-18; Radiocarbon. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00289/40039/38763.pdf |
| |
|
|
|
