Age models and sedimentation rates of sites in the tropical Atlantic
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1994
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867167662431272960 |
|---|---|
| author | Verardo, David J McIntyre, Andrew |
| author_facet | Verardo, David J McIntyre, Andrew |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Late Pleistocene signals of calcium carbonate, organic carbon, and opaline silica concentration and accumulation are documented in a series of cores from a zonal/meridional/depth transect in the equatorial Atlantic Ocean to reconstruct the regional sedimentary history. Spectral analysis reveals that maxima and minima in biogenous sedimentation occur with glacial-interglacial cyclicity as a function of both (1) primary production at the sea surface modulated by orbitally forced variation in trade wind zonality and (2) destruction at the seafloor by variation in the chemical character of advected intermediate and deep water from high latitudes modulated by high-latitude ice volume. From these results a pattern emerges in which the relative proportion of signal variance from the productivity signal centered on the precessional (23 kyr) band decreases while that of the destruction signal centered on the obliquity (41 kyr) and eccentricity (100 kyr) periods increases below ~3600-m ocean depth. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_729831 |
| institution | PANGAEA |
| language | en |
| publishDate | 1994 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age models and sedimentation rates of sites in the tropical Atlantic Verardo, David J McIntyre, Andrew Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC16; RC16-66; RC24; RC24-1; RC24-12; RC24-16; RC24-7; Robert Conrad; V25; V25-56; Vema Late Pleistocene signals of calcium carbonate, organic carbon, and opaline silica concentration and accumulation are documented in a series of cores from a zonal/meridional/depth transect in the equatorial Atlantic Ocean to reconstruct the regional sedimentary history. Spectral analysis reveals that maxima and minima in biogenous sedimentation occur with glacial-interglacial cyclicity as a function of both (1) primary production at the sea surface modulated by orbitally forced variation in trade wind zonality and (2) destruction at the seafloor by variation in the chemical character of advected intermediate and deep water from high latitudes modulated by high-latitude ice volume. From these results a pattern emerges in which the relative proportion of signal variance from the productivity signal centered on the precessional (23 kyr) band decreases while that of the destruction signal centered on the obliquity (41 kyr) and eccentricity (100 kyr) periods increases below ~3600-m ocean depth. |
| title | Age models and sedimentation rates of sites in the tropical Atlantic |
| topic | Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC16; RC16-66; RC24; RC24-1; RC24-12; RC24-16; RC24-7; Robert Conrad; V25; V25-56; Vema |
| url | https://doi.org/10.1594/PANGAEA.729831 |