Mesoscale modulation of air-sea CO2 flux in Drake Passage

Hajoon Song, John Marshall, David R. Munro, Stephanie Dutkiewicz, Colm Sweeney, D. J. McGillicuddy, Ute Hausmann

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO2) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO2 anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO2 are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate.

Original languageEnglish
Pages (from-to)6635-6649
Number of pages15
JournalJournal of Geophysical Research: Oceans
Volume121
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

Fingerprint

Nitrates
eddy
Iron
carbon dioxide
Modulation
vortices
Fluxes
modulation
air
Dacarbazine
Degassing
vertical mixing
Air
Partial pressure
Thermal effects
Numerical models
winter
summer
nitrates
nitrate

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Song, H., Marshall, J., Munro, D. R., Dutkiewicz, S., Sweeney, C., McGillicuddy, D. J., & Hausmann, U. (2016). Mesoscale modulation of air-sea CO2 flux in Drake Passage. Journal of Geophysical Research: Oceans, 121(9), 6635-6649. https://doi.org/10.1002/2016JC011714
Song, Hajoon ; Marshall, John ; Munro, David R. ; Dutkiewicz, Stephanie ; Sweeney, Colm ; McGillicuddy, D. J. ; Hausmann, Ute. / Mesoscale modulation of air-sea CO2 flux in Drake Passage. In: Journal of Geophysical Research: Oceans. 2016 ; Vol. 121, No. 9. pp. 6635-6649.
@article{b9177e169b124fd6a3c756f63018bedc,
title = "Mesoscale modulation of air-sea CO2 flux in Drake Passage",
abstract = "We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO2) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO2 anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO2 are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate.",
author = "Hajoon Song and John Marshall and Munro, {David R.} and Stephanie Dutkiewicz and Colm Sweeney and McGillicuddy, {D. J.} and Ute Hausmann",
year = "2016",
month = "9",
day = "1",
doi = "10.1002/2016JC011714",
language = "English",
volume = "121",
pages = "6635--6649",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "9",

}

Song, H, Marshall, J, Munro, DR, Dutkiewicz, S, Sweeney, C, McGillicuddy, DJ & Hausmann, U 2016, 'Mesoscale modulation of air-sea CO2 flux in Drake Passage', Journal of Geophysical Research: Oceans, vol. 121, no. 9, pp. 6635-6649. https://doi.org/10.1002/2016JC011714

Mesoscale modulation of air-sea CO2 flux in Drake Passage. / Song, Hajoon; Marshall, John; Munro, David R.; Dutkiewicz, Stephanie; Sweeney, Colm; McGillicuddy, D. J.; Hausmann, Ute.

In: Journal of Geophysical Research: Oceans, Vol. 121, No. 9, 01.09.2016, p. 6635-6649.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mesoscale modulation of air-sea CO2 flux in Drake Passage

AU - Song, Hajoon

AU - Marshall, John

AU - Munro, David R.

AU - Dutkiewicz, Stephanie

AU - Sweeney, Colm

AU - McGillicuddy, D. J.

AU - Hausmann, Ute

PY - 2016/9/1

Y1 - 2016/9/1

N2 - We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO2) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO2 anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO2 are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate.

AB - We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO2) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO2 anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO2 are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate.

UR - http://www.scopus.com/inward/record.url?scp=84987646111&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84987646111&partnerID=8YFLogxK

U2 - 10.1002/2016JC011714

DO - 10.1002/2016JC011714

M3 - Article

AN - SCOPUS:84987646111

VL - 121

SP - 6635

EP - 6649

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 9

ER -

Song H, Marshall J, Munro DR, Dutkiewicz S, Sweeney C, McGillicuddy DJ et al. Mesoscale modulation of air-sea CO2 flux in Drake Passage. Journal of Geophysical Research: Oceans. 2016 Sep 1;121(9):6635-6649. https://doi.org/10.1002/2016JC011714