10.1594/PANGAEA.52670
Loubere, Paul
Paul
Loubere
Oxygen content and paleoproductivity from surface sediment samples Y69-86 to PLDS-004G
PANGAEA
1994
Event label
Latitude of event
Longitude of event
Elevation of event
DEPTH, sediment/rock
Comment
Paleoproductivity as carbon
Oxygen
Gravity corer
Piston corer
Core
Free fall corer
Calculated
AMPHITRITE
ATII_USA
OC73-3
PLDS-1
RC09
RC14
SCAN
V19
YALOC69
Y71-03
Y71-06
Y71-07
Y71-09
Argo
Atlantis II (1963)
Oceanographer
Melville
Robert Conrad
Vema
Yaquina
1963-04-24T00:00:00/1976-05-22T00:00:00
en
Supplementary Dataset
10.1029/94PA01624
280 data points
text/tab-separated-values
Creative Commons Attribution 3.0 Unported
Quantitative estimation of surface ocean productivity and bottom water oxygen concentration with benthic foraminifera was attempted using 70 samples from equatorial and North Pacific surface sediments. These samples come from a well defined depth range in the ocean, between 2200 and 3200 m, so that depth related factors do not interfere with the estimation. Samples were selected so that foraminifera were well preserved in the sediments and temperature and salinity were nearly uniform (T = 1.5° C; S = 34.6 per mil). The sample set was also assembled so as to minimize the correlation often seen between surface ocean productivity and bottom water oxygen values (r**2 = 0.23 for prediction purposes in this case). This procedure reduced the chances of spurious results due to correlations between the environmental variables. The samples encompass a range of productivities from about 25 to >300 gC m**-2 yr**-1, and a bottom water oxygen range from 1.8 to 3.5 ml/L. Benthic foraminiferal assemblages were quantified using the >62 µm fraction of the sediments and 46 taxon categories. MANOVA multivariate regression was used to project the faunal matrix onto the two environmental dimensions using published values for productivity and bottom water oxygen to calibrate this operation. The success of this regression was measured with the multivariate r? which was 0.98 for the productivity dimension and 0.96 for the oxygen dimension. These high coefficients indicate that both environmental variables are strongly imbedded in the faunal data matrix. Analysis of the beta regression coefficients shows that the environmental signals are carried by groups of taxa which are consistent with previous work characterizing benthic foraminiferal responses to productivity and bottom water oxygen. The results of this study suggest that benthic foraminiferal assemblages can be used for quantitative reconstruction of surface ocean productivity and bottom water oxygen concentrations if suitable surface sediment calibration data sets are developed and appropriate means for detecting no-analog samples are found.
Supplement to: Loubere, Paul (1994): Quantitative estimation of surface ocean productivity and bottom water oxygen concentration using benthic foraminifera. Paleoceanography, 9(5), 723-738
157.663
-77.56299999999999
-28.092
51.155
Pacific
South Pacific Ocean