Intermediate water circulation drives distribution of Pliocene Oxygen Minimum Zones.

Autor: Davis CV; Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, USA. catherinedavis@ncsu.edu., Sibert EC; Department of Earth and Planetary Sciences, Yale University, New Haven, CT, USA.; Yale Institute for Biospheric Studies, Yale University, New Haven, CT, USA., Jacobs PH; Department of Environmental Science and Policy, George Mason University, Fairfax, VA, USA.; Earth Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, USA., Burls N; Department of Atmospheric, Ocean & Earth Sciences, George Mason University, Fairfax, VA, USA., Hull PM; Department of Earth and Planetary Sciences, Yale University, New Haven, CT, USA.; Yale Institute for Biospheric Studies, Yale University, New Haven, CT, USA.; Yale Peabody Museum of Natural History, Yale University, New Haven, CT, USA.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Jan 04; Vol. 14 (1), pp. 40. Date of Electronic Publication: 2023 Jan 04.
DOI: 10.1038/s41467-022-35083-x
Abstrakt: Oxygen minimum zones (OMZs) play a critical role in global biogeochemical cycling and act as barriers to dispersal for marine organisms. OMZs are currently expanding and intensifying with climate change, however past distributions of OMZs are relatively unknown. Here we present evidence for widespread pelagic OMZs during the Pliocene (5.3-2.6 Ma), the most recent epoch with atmospheric CO 2 analogous to modern (~400-450 ppm). The global distribution of OMZ-affiliated planktic foraminifer, Globorotaloides hexagonus, and Earth System and Species Distribution Models show that the Indian Ocean, Eastern Equatorial Pacific, eastern South Pacific, and eastern North Atlantic all supported OMZs in the Pliocene, as today. By contrast, low-oxygen waters were reduced in the North Pacific and expanded in the North Atlantic in the Pliocene. This spatially explicit perspective reveals that a warmer world can support both regionally expanded and contracted OMZs, with intermediate water circulation as a key driver.
(© 2023. The Author(s).)
Databáze: MEDLINE
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