Nitrogen isotope evidence for expanded ocean suboxia in the early Cenozoic

Kast, Emma R.; Stolper, Daniel A.; Auderset, Alexandra; Higgins, John A.; Ren, Haojia; Wang, Xingchen T.; Martínez-García, Alfredo; Haug, Gerald H.; Sigman, Daniel M.

doi:10.1126/science.aau5784

i

Nitrogen isotope evidence for expanded ocean suboxia in the early Cenozoic

2019
By Kast, Emma R. ; Stolper, Daniel A. ; Auderset, Alexandra ; ...

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Journal Title:

Science
Personal Author:

Kast, Emma R. ; Stolper, Daniel A. ; Auderset, Alexandra ; Higgins, John A. ; Ren, Haojia ; Wang, Xingchen T. ; Martínez-García, Alfredo ; Haug, Gerald H. ; Sigman, Daniel M.
NOAA Program & Office:

NOAA General Documents
Description:

Circulation more than temperature Changes in continental configuration and sea level affected the ocean's oxygen levels and the rate of denitrification between 70 and 30 million years ago. That finding by Kast et al. shows a fundamental difference from the modern ocean, in which the extent of suboxia is controlled primarily by global temperature. Changes in the nitrogen isotopic composition of marine organic matter correlate with the collision of India and Asia and the circulation changes that occurred as a result. Later, isotopic composition changed further in response to a fall in sea level as global cooling caused ice sheets to grow. Science , this issue p. 386
Keywords:

Multidisciplinary
Source:

Science, 364(6438), 386-389
DOI:

https://doi.org/10.1126/science.aau5784
ISSN:

0036-8075 ; 1095-9203
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PDF
Publisher:

American Association for the Advancement of Science (AAAS)
Document Type:

Journal Article
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Library
Main Document Checksum:

urn:sha256:ef34c3fac1173f6e8138ef511144339d590c9fc427e9ceaed338ec26f3bd4f03
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https://repository.library.noaa.gov/view/noaa/60055/noaa_60055_DS1.pdf
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[PDF - 475.72 KB ]

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