Enzyme-level interconversion of nitrate and nitrite in the fall mixed layer of the Antarctic Ocean

Kemeny, P. C.; Weigand, M. A.; Zhang, R.; Carter, B. R.; Karsh, K. L.; Fawcett, S. E.; Sigman, D. M.

doi:10.1002/2015gb005350

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Enzyme-level interconversion of nitrate and nitrite in the fall mixed layer of the Antarctic Ocean

2016
By Kemeny, P. C. ; Weigand, M. A. ; Zhang, R. ; ...
Source: Global Biogeochemical Cycles, 30(7), 1069-1085

[PDF-1.42 MB]

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Details:

Journal Title:

Global Biogeochemical Cycles
Personal Author:

Kemeny, P. C. ; Weigand, M. A. ; Zhang, R. ; Carter, B. R. ; Karsh, K. L. ; ... More +

Kemeny, P. C. ; Weigand, M. A. ; Zhang, R. ; Carter, B. R. ; Karsh, K. L. ; Fawcett, S. E. ; Sigman, D. M. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; JISAO (Joint Institute for the Study of the Atmosphere and Ocean) ; PMEL (Pacific Marine Environmental Laboratory)

OAR (Oceanic and Atmospheric Research) ; JISAO (Joint Institute for the Study of the Atmosphere and Ocean) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

In the Southern Ocean, the nitrogen (N) isotopes of organic matter and the N and oxygen (O) isotopes of nitrate (NO 3/C0) have been used to investigate NO 3/C0assimilation and N cycling in the summertime period of phytoplankton growth, both today and in the past. However, recent studies indicate the signi ﬁcance of processes in other seasons for producing the annual cycle of N isotope changes. This study explores the impact of fall conditions on the15N/14N(δ15N) and18O/16O(δ18O) of NO 3/C0and nitrite (NO 2/C0)i nt h eP a c i ﬁc Antarctic Zone using depth pro ﬁles from late summer/fall of 2014. In the mixed layer, the δ15Na n d δ18Oo f NO3/C0+N O 2/C0increase roughly equally, as expected for NO 3/C0assimilation; however, the δ15No fN O 3/C0-only
Keywords:

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Atmospheric Science Environmental Chemistry General Environmental Science Global And Planetary Change
Source:

Global Biogeochemical Cycles, 30(7), 1069-1085
DOI:

https://doi.org/10.1002/2015gb005350
ISSN:

0886-6236
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PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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Library
Main Document Checksum:

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urn:sha256:ca4799fa12a9bc559564a245eb18cae11fbc9dd217637b19ccb0aa14eb94ffd7
Download URL:

https://repository.library.noaa.gov/view/noaa/53639/noaa_53639_DS1.pdf
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