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Gardner, James V; Dean, Walter E; Dartnell, Peter (1997): Carbonate sedimentation beneath the Carlifornia Current system. PANGAEA, https://doi.org/10.1594/PANGAEA.730049, Supplement to: Gardner, JV et al. (1997): Biogenic sedimentation beneath the California Current system for the past 30 kyr and its paleoceanographic significance. Paleoceanography, 12(2), 207-226, https://doi.org/10.1029/96PA03567

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Abstract:
A north-south transect of 17 cores was constructed along the eastern boundary of the California Current system from 33° to 42°N to investigate the changes in biogenic sedimentation over the past 30 kyr. Percentages and mass accumulation rates of CaCO3, Corg, and biogenic opal were assembled at 500 to 1000 years/sample to provide relatively high resolution. Time-space maps reveal a complex pattern of changes that do not follow a simple glacial-interglacial two-mode model. Biogenic sedimentation shows responses that are sometimes time-transgressive and sometimes coeval, and most of the responses show more consistency within a limited geographic area than any temporal consistency. Reconstructed conditions during late oxygen isotope stage 3 were more like early Holocene conditions than any other time during the last 30 kyr. Coastal upwelling and productivity during oxygen isotope stage 3 were relatively strong along the central California margin but were weak along the northern California margin. Precipitation increased during the last glacial interval in the central California region, and the waters of the southern California margin had relatively low productivity. Productivity on the southern Oregon margin was relatively low at the beginning of the last glacial interval, but by about 20 ka, productivity in this area significantly increased. This change suggests that the center of the divergence of the West Wind Drift shifted south at this time. The end of the last glacial interval was characterized by increased productivity in the southern California margin and increased upwelling along the central California margin but upwelling remained weak along the northern California margin. A sudden (<300 years) decrease in CaCO3, Corg, and biogenic opal occurred at 13 ka. The changes suggest a major reorientation of the atmospheric circulation in the North Pacific and western North America and the establishment of a strong seasonality in the central California region. A carbonate preservation event occurred at 10 ka that appears to reflect the uptake of CO2 by the terrestrial biosphere as the northern latitudes were reforested following retreat of the glaciers. The Holocene has been a period of relatively high productivity in the southern California margin, relatively strong coastal upwelling along the central California margin, relatively weak upwelling along the northern California margin, and the northward migration of the divergence zone of the West Wind Drift.
Coverage:
Median Latitude: 36.369804 * Median Longitude: -122.336396 * South-bound Latitude: 32.915333 * West-bound Longitude: -125.750000 * North-bound Latitude: 42.117000 * East-bound Longitude: -119.737167
Date/Time Start: 1987-10-02T00:00:00 * Date/Time End: 1987-10-02T00:00:00
Event(s):
F2-92-P18 * Latitude: 34.711500 * Longitude: -121.111000 * Elevation: -584.0 m * Device: Piston corer (PC)
F2-92-P29 * Latitude: 32.915333 * Longitude: -119.737167 * Elevation: -1475.0 m * Device: Piston corer (PC)
F2-92-P3 * Latitude: 35.623333 * Longitude: -121.438333 * Elevation: -799.0 m * Location: Pacific Ocean * Device: Piston corer (PC)
Size:
40 datasets

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Datasets listed in this publication series

  1. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination of sediment core V1-80-P3. https://doi.org/10.1594/PANGAEA.399875
  2. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core F2-92-P18. https://doi.org/10.1594/PANGAEA.399866
  3. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core F2-92-P29. https://doi.org/10.1594/PANGAEA.399867
  4. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core F2-92-P3. https://doi.org/10.1594/PANGAEA.399869
  5. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core F2-92-P34. https://doi.org/10.1594/PANGAEA.399868
  6. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core F8-90-G21. https://doi.org/10.1594/PANGAEA.399870
  7. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core L13-81-G117. https://doi.org/10.1594/PANGAEA.399871
  8. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core L13-81-G138. https://doi.org/10.1594/PANGAEA.399872
  9. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core V1-80-G1. https://doi.org/10.1594/PANGAEA.399873
  10. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core V1-80-G22. https://doi.org/10.1594/PANGAEA.399874
  11. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core V1-81-G15. https://doi.org/10.1594/PANGAEA.399876
  12. Gardner, JV; Dean, WE; Dartnell, P (1997): (Table 2) Age determination on sediment core W8709A-13. https://doi.org/10.1594/PANGAEA.399877
  13. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P18. https://doi.org/10.1594/PANGAEA.399892
  14. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P29. https://doi.org/10.1594/PANGAEA.399893
  15. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P3. https://doi.org/10.1594/PANGAEA.399895
  16. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P34. https://doi.org/10.1594/PANGAEA.399894
  17. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P40. https://doi.org/10.1594/PANGAEA.399896
  18. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F2-92-P54. https://doi.org/10.1594/PANGAEA.399897
  19. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F8-90-G21. https://doi.org/10.1594/PANGAEA.399898
  20. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core F8-90-G25. https://doi.org/10.1594/PANGAEA.399899
  21. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core L13-81-G117. https://doi.org/10.1594/PANGAEA.399900
  22. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core L13-81-G138. https://doi.org/10.1594/PANGAEA.399901
  23. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core V1-80-G22. https://doi.org/10.1594/PANGAEA.399902
  24. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core V1-80-P3. https://doi.org/10.1594/PANGAEA.399903
  25. Gardner, JV; Dean, WE; Dartnell, P (1997): Age model on sediment core V1-81-G15. https://doi.org/10.1594/PANGAEA.399904
  26. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P18. https://doi.org/10.1594/PANGAEA.399878
  27. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P29. https://doi.org/10.1594/PANGAEA.399879
  28. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P3. https://doi.org/10.1594/PANGAEA.399882
  29. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P33. https://doi.org/10.1594/PANGAEA.399880
  30. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P34. https://doi.org/10.1594/PANGAEA.399881
  31. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P40. https://doi.org/10.1594/PANGAEA.399883
  32. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P51. https://doi.org/10.1594/PANGAEA.399884
  33. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F2-92-P54. https://doi.org/10.1594/PANGAEA.399885
  34. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F8-90-G21. https://doi.org/10.1594/PANGAEA.399886
  35. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core F8-90-G25. https://doi.org/10.1594/PANGAEA.399887
  36. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core L13-81-G117. https://doi.org/10.1594/PANGAEA.399888
  37. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core L13-81-G138. https://doi.org/10.1594/PANGAEA.399889
  38. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core V1-80-G22. https://doi.org/10.1594/PANGAEA.399890
  39. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate in sediment core V1-81-G15. https://doi.org/10.1594/PANGAEA.399891
  40. Gardner, JV; Dean, WE; Dartnell, P (1997): Calcium carbonate of sediment core V1-80-P3. https://doi.org/10.1594/PANGAEA.55566