Publikationsdatum:
2024-01-09
Beschreibung:
Recent modeling studies call on increased ocean heat transport to explain high-latitude warming observed for intervals throughout the middle Pliocene. Possible vehicles for ocean heat transport are the poleward arms of the subtropical gyres. Sites from the California margin (Ocean Drilling Program Leg 167) provide monitors of wind field within the eastern arm of the gyre which may be an indication of basin-wide subtropical gyral strength. At most sites (water depths from 1106 to 4212 m) CaCO3 mass accumulation rate (MAR) was highest in the middle Pliocene (3.5-2.0 Ma). This high CaCO3 MAR 'event' is attributed primarily to higher CaCO3 production due to higher offshore upwelling associated with the zone of the greatest wind stress curl. Thus, in the middle Pliocene, there was enhanced wind stress curl along the California margin, and possibly enhanced North Pacific sub-tropical gyral circulation and meridional ocean heat advection.
Schlagwort(e):
167-1010; 167-1011; 167-1012; 167-1013; 167-1014; 167-1016; 167-1017; 167-1018; 167-1019; 167-1020; 167-1021; Accumulation rate, calcium carbonate; Accumulation rate, total organic carbon; AGE; Age, maximum/old; Age model; Ageprofile Datum Description; Calcium carbonate; Carbon, organic, total; COMPCORE; Composite Core; Density, dry bulk; Depth, composite; Depth, composite bottom; Depth, composite top; DEPTH, sediment/rock; Elevation of event; Event label; Joides Resolution; Latitude of event; Leg167; Longitude of event; North Pacific Ocean; Nuttallides rugosa, δ13C; Ocean Drilling Program; ODP; Sedimentation rate
Materialart:
Dataset
Format:
text/tab-separated-values, 1353 data points
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