Carbon to Nitrogen Uptake Ratios Observed Across the Southern Ocean by the SOCCOM Profiling Float Array

Johnson, Kenneth S.; Mazloff, Matthew R.; Bif, Mariana B.; Takeshita, Yuichiro; Jannasch, Hans W.; Maurer, Tanya L.; Plant, Joshua N.; Verdy, Ariane; Walz, Peter M.; Riser, Stephen C.; Talley, Lynne D.

doi:10.1029/2022jc018859

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Carbon to Nitrogen Uptake Ratios Observed Across the Southern Ocean by the SOCCOM Profiling Float Array

2022
By Johnson, Kenneth S. ; Mazloff, Matthew R. ; Bif, Mariana B. ; ...
Source: Journal of Geophysical Research: Oceans, 127(9)

[PDF-1.66 MB]

Details You May Also Like

Details:

Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Johnson, Kenneth S. ; Mazloff, Matthew R. ; Bif, Mariana B. ; Takeshita, Yuichiro ; Jannasch, Hans W. ; ... More +

Johnson, Kenneth S. ; Mazloff, Matthew R. ; Bif, Mariana B. ; Takeshita, Yuichiro ; Jannasch, Hans W. ; Maurer, Tanya L. ; Plant, Joshua N. ; Verdy, Ariane ; Walz, Peter M. ; Riser, Stephen C. ; Talley, Lynne D. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies)

OAR (Oceanic and Atmospheric Research) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) Less -
Description:

Measurements of pH and nitrate from the Southern Ocean Carbon and Climate Observations and Modeling array of profiling floats were used to assess the ratios of dissolved inorganic carbon (DIC) and nitrate (NO3) uptake during the spring to summer bloom period throughout the Southern Ocean. Two hundred and forty-three bloom periods were observed by 115 floats from 30°S to 70°S. Similar calculations were made using the Takahashi surface DIC and nitrate climatology. To separate the effects of atmospheric CO2 exchange and mixing from phytoplankton uptake, the ratios of changes in DIC to nitrate of surface waters (ΔDIC/ΔNO3) were computed in the Biogeochemical Southern Ocean State Estimate (B-SOSE) model. Phytoplankton uptake of DIC and nitrate are fixed in B-SOSE at the Redfield Ratio (RR; 6.6 mol C/mol N). Deviations in the B-SOSE ΔDIC/ΔNO3 must be due to non-biological effects of CO2 gas exchange and mixing. ΔDIC/ΔNO3 values observed by floats and in the Takahashi climatology were corrected for the non-biological effects using B-SOSE. The corrected, in situ biological uptake ratio (C:N) occurs at values similar to the RR, with two major exceptions. North of 40°S biological DIC uptake is observed with little or no change in nitrate giving high C:N. In the latitude band at 55°S, the Takahashi data give a low C:N value, while floats are high. This may be due to a change in CO2 air-sea exchange in this region from uptake during the Takahashi reference year of 2005 to outgassing of CO2 during the years sampled by floats.
Source:

Journal of Geophysical Research: Oceans, 127(9)
DOI:

https://doi.org/10.1029/2022jc018859
ISSN:

2169-9275;2169-9291;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA20OAR4320271
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

CHORUS
Main Document Checksum:

[+]

urn:sha256:01c4ceacdc0afece702eb4244426ce2dcae9fb390f655a4185f71eac2a218846
Download URL:

https://repository.library.noaa.gov/view/noaa/49938/noaa_49938_DS1.pdf
File Type:

No Additional Files

More +

Carbon to Nitrogen Uptake Ratios Observed Across the Southern Ocean by the SOCCOM Profiling Float Array

Details:

Supporting Files

You May Also Like