Maria H Toyos
Toyos
Maria H
MARUM - Center for Marine Environmental Sciences, University Bremen
MARUM
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam
AWI Potsdam
Frank Lamy
Lamy
Frank
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
AWI
Carina Beatriz Lange
Lange
Carina Beatriz
Departamento de Oceanografia, Universidad de Conceptión
UDEC
Jordan T Abell
Abell
Jordan T
University of Arizona
Lester Lembke-Jene
Lembke-Jene
Lester
Helge Wolfgang Arz
Arz
Helge Wolfgang
Leibniz Institute for Baltic Sea Research, Warnemünde
IOW
Gisela Winckler
Winckler
Gisela
Lamont-Doherty Earth Observatory of Columbia University, New York
LDEO
Concentrations of export production indicators and corrected and non-corrected accumulation rates of indicators of opal, Carbonates, Fe, TOC and Barium excess from core PS97/093-2 over the past 1.4 Ma
PANGAEA
Data Publisher for Earth & Environmental Science
dataset
Studying oceanic particle fluxes from sediment records is an important component of paleoceanography. Traditionally, we calculate these fluxes using a combination of linear sedimentation rates derived from age models and sediment density, known as age model-derived bulk mass accumulation rates (BMAR). However, BMAR and the resulting paleoceanographic interpretations may suffer from substantial errors if lateral redistribution of sediments is not considered. In fact, this is expected to be a common phenomenon in the Southern Ocean due to the strong bottom water circulation induced by the Antarctic Circumpolar Current. In the study associated to this dataset, we assess export production and its drivers over the past ~1.4 Myr near the Drake Passage entrance using BMAR of biogenic Barium, organic carbon, biogenic opal, calcium carbonate, and iron from sediment core PS97/093-2, all of which are corrected for lateral sediment redistribution (corr-BMAR). To quantify this correction, we explore the relationship between sortable silt as a bottom current strength proxy and 230Th-derived focusing factors as indicators of lateral redistribution of sediments, respectively. Therefore, this dataset includes the following data: Concentrations of export production indicators (opal, Carbonates, Fe, total organic carbon, and excess of Barium), dry bulk density, sortable silt (averaged between tie points), calculated focusing factors, and corrected and non-corrected accumulation rates of export production indicators of core PS97/093-2 over the past 1.4 million years.
A New Perspective on Past Export Production in the Subantarctic South Pacific for the Last ∼1.4 Myr
Paleoceanography and Paleoclimatology
journal article
FONDAP-IDEAL
Austral University of Chile
UACh
EXC 2077: The Ocean Floor – Earth's Uncharted Interface
German Research Foundation
DFG
data points
DEPTH, sediment/rock
depth
sediment
rock
Length
AGE
ka BP
age
Time
Opal, biogenic silica
wt%
opal
biogenic silica
Dimensionless Ratio
Calcium carbonate
calcium carbonate
Iron
Barium excess
excessTi , wt%
Carbon, organic, total
carbon
organic
total
Density, dry bulk
g/cm**3
Density
Sortable-silt mean
averaged between age model tie points
Focusing factor
Calculated
Accumulation rate, bulk mass
g/cm**2/ka
Accumulation Rate
Accumulation rate, bulk mass, opal
Accumulation rate, bulk mass, calcium carbonate
Accumulation rate, bulk mass, iron
mg/cm**2/ka
Accumulation rate, bulk mass, barium, excess
barium
Accumulation rate, bulk mass, carbon, organic, total
Corrected
Accumulation rate, bulk mass, standard error
standard error
std e
Accumulation rate, bulk mass, opal, standard error
Accumulation rate, bulk mass, calcium carbonate, standard error
Accumulation rate, bulk mass, iron, standard error
Accumulation rate, bulk mass, barium, excess, standard error
Accumulation rate, bulk mass, carbon, organic, total, standard error
Accumulation rate; Export Production; focusing factor; Paleoceanography; paleoproductivity.; Southern Ocean; Subantarctic zone
unrestricted
text/tab-separated-values
text/html