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Herbert, Timothy D; Lawrence, Kira T; Tzanova, Alexandrina; Peterson, Laura C; Caballero-Gill, Rocio P; Kelly, Christopher S (2018): Late Miocene alkenone unsaturation data, age models, and regional stacks of alkenones. PANGAEA, https://doi.org/10.1594/PANGAEA.885390, Supplement to: Herbert, TD et al. (2016): Late Miocene global cooling and the rise of modern ecosystems. Nature Geoscience, 9(11), 843-847, https://doi.org/10.1038/ngeo2813

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Abstract:
During the late Miocene epoch, about seven million years ago, large areas of the continents experienced drying, enhanced seasonality, and a restructuring of terrestrial plant and animal communities. These changes are seen throughout the subtropics, but have typically been attributed to regional tectonic forcing. Here we present a set of globally distributed sea surface temperature records spanning the past 12 million years based on the alkenone unsaturation method. We find that a sustained late Miocene cooling occurred synchronously in both hemispheres, and culminated with ocean temperatures dipping to near-modern values between about 7 and 5.4 million years ago. The period of maximum cooling coincides with evidence for transient glaciations in the Northern Hemisphere and with a steepening of the pole-to-equator temperature gradient, as well. We thus infer that late Miocene aridity and terrestrial ecosystem changes occurred in a global context of increasing meridional temperature gradients. We conclude that a global forcing mechanism, such as the previously hypothesized decline in atmospheric CO2 levels between eight and six million years ago, is required to explain the late Miocene changes in temperature, climate and ecosystems.
Project(s):
Coverage:
Median Latitude: 19.502333 * Median Longitude: -163.556260 * South-bound Latitude: -45.523500 * West-bound Longitude: 13.341660 * North-bound Latitude: 69.249800 * East-bound Longitude: -12.698200
Date/Time Start: 1983-01-03T00:00:00 * Date/Time End: 2002-05-20T00:00:00
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52 datasets

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Datasets listed in this publication series

  1. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S1) Site locations, statistics of temporal coverage. https://doi.org/10.1594/PANGAEA.885626
  2. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST esimates as a function of age, Mediterranean sites. https://doi.org/10.1594/PANGAEA.885603
  3. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, DSDP Site 90-594. https://doi.org/10.1594/PANGAEA.885572
  4. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, IODP Hole 321-U1338B. https://doi.org/10.1594/PANGAEA.885586
  5. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Hole 145-887C. https://doi.org/10.1594/PANGAEA.885575
  6. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Hole 175-1085A. https://doi.org/10.1594/PANGAEA.885580
  7. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Hole 198-1208A. https://doi.org/10.1594/PANGAEA.885584
  8. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 117-722. https://doi.org/10.1594/PANGAEA.885587
  9. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 138-846. https://doi.org/10.1594/PANGAEA.885573
  10. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 138-850. https://doi.org/10.1594/PANGAEA.885574
  11. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 145-883/884. https://doi.org/10.1594/PANGAEA.885588
  12. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 151-907. https://doi.org/10.1594/PANGAEA.885594
  13. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 162-982. https://doi.org/10.1594/PANGAEA.885578
  14. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 167-1010. https://doi.org/10.1594/PANGAEA.885599
  15. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 167-1021. https://doi.org/10.1594/PANGAEA.885579
  16. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 177-1088. https://doi.org/10.1594/PANGAEA.885582
  17. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 181-1125. https://doi.org/10.1594/PANGAEA.885583
  18. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S2) SST estimates as a function of age, ODP Site 202-1241. https://doi.org/10.1594/PANGAEA.885585
  19. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Hole 145-887C. https://doi.pangaea.de/10.1594/PANGAEA.885397
  20. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Hole 151-907A, version A. https://doi.pangaea.de/10.1594/PANGAEA.885398
  21. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 117-722. https://doi.pangaea.de/10.1594/PANGAEA.885393
  22. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 138-846. https://doi.pangaea.de/10.1594/PANGAEA.885394
  23. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 145-883. https://doi.pangaea.de/10.1594/PANGAEA.885395
  24. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 145-884B. https://doi.pangaea.de/10.1594/PANGAEA.885396
  25. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 162-907B. https://doi.pangaea.de/10.1594/PANGAEA.885408
  26. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 162-907C. https://doi.pangaea.de/10.1594/PANGAEA.885409
  27. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 162-982. https://doi.pangaea.de/10.1594/PANGAEA.885401
  28. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 175-1085. https://doi.pangaea.de/10.1594/PANGAEA.885402
  29. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 177-1088. https://doi.pangaea.de/10.1594/PANGAEA.885403
  30. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 198-1208. https://doi.pangaea.de/10.1594/PANGAEA.885404
  31. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 201-1225. https://doi.pangaea.de/10.1594/PANGAEA.885405
  32. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S3) Age model of ODP Site 90-594. https://doi.pangaea.de/10.1594/PANGAEA.885406
  33. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, DSDP Site 90-594. https://doi.org/10.1594/PANGAEA.885388
  34. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, IODP Site 321-U1338. https://doi.org/10.1594/PANGAEA.885387
  35. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 117-722. https://doi.org/10.1594/PANGAEA.885374
  36. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 138-846. https://doi.org/10.1594/PANGAEA.885375
  37. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 138-850. https://doi.org/10.1594/PANGAEA.885376
  38. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 145-884. https://doi.org/10.1594/PANGAEA.885377
  39. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 145-887. https://doi.org/10.1594/PANGAEA.885378
  40. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 151-907. https://doi.org/10.1594/PANGAEA.885379
  41. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 162-982. https://doi.org/10.1594/PANGAEA.885380
  42. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 167-1010. https://doi.org/10.1594/PANGAEA.885381
  43. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 167-1021. https://doi.org/10.1594/PANGAEA.885382
  44. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 177-1088. https://doi.org/10.1594/PANGAEA.885383
  45. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 198-1208. https://doi.org/10.1594/PANGAEA.885384
  46. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 201-1225. https://doi.org/10.1594/PANGAEA.885385
  47. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, ODP Site 202-1241. https://doi.org/10.1594/PANGAEA.885386
  48. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S4) Modern SST at the site location, backtracked for plate movement, sediment core MDC. https://doi.org/10.1594/PANGAEA.885389
  49. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S5) Regional stacks of SST estimates as a function of age, Region 1 Mid NH. https://doi.org/10.1594/PANGAEA.885620
  50. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S5) Regional stacks of SST estimates as a function of age, Region 2 Mid SH. https://doi.org/10.1594/PANGAEA.885621
  51. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S5) Regional stacks of SST estimates as a function of age, Region 3 tropics. https://doi.org/10.1594/PANGAEA.885622
  52. Herbert, TD; Lawrence, KT; Tzanova, A et al. (2018): (Table S5) Regional stacks of SST estimates as a function of age, Region 4 NH high latitudes. https://doi.org/10.1594/PANGAEA.885623