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Details van artikel 62 van 79 gevonden artikelen
| Titel: |
Rapid reorganization in ocean biogeochemistry off Peru towards the end of the Little Ice Age |
| Auteur: |
D. Gutiérrez A. Sifeddine D. B. Field L. Ortlieb G. Vargas F. P. Chávez F. Velazco V. Ferreira P. Tapia R. Salvatteci H. Boucher M. C. Morales J. Valdés J.-L. Reyss A. Campusano M. Boussafir M. Mandeng-Yogo M. García T. Baumgartner |
| Verschenen in: |
Biogeosciences |
| Paginering: | Jaargang 6 (2009) nr. 5 pagina's 835-848 |
| Jaar: |
2009 |
| Inhoud: |
Climate and ocean ecosystem variability has been well recognized during the twentieth century but it is unclear if modern ocean biogeochemistry is susceptible to the large, abrupt shifts that characterized the Late Quaternary. Time series from marine sediments off Peru show an abrupt centennial-scale biogeochemical regime shift in the early nineteenth century, of much greater magnitude and duration than present day multi-decadal variability. A rapid expansion of the subsurface nutrient-rich, oxygen-depleted waters resulted in the present-day higher biological productivity, including pelagic fish. The shift was likely driven by a northward migration of the Intertropical Convergence Zone and the South Pacific Subtropical High to their present day locations, coupled with a strengthening of Walker circulation, towards the end of the Little Ice Age. These findings reveal the potential for large reorganizations in tropical Pacific climate with immediate effects on ocean biogeochemical cycling and ecosystem structure. |
| Uitgever: |
Copernicus GmbH (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 62 van 79 gevonden artikelen
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