| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Mesoscale modulation of air-sea CO2 flux in Drake Passage
|
| Autores: |
Song, Hajoon
Marshall, John
Munro, David R.
Dutkiewicz, Stephanie
Sweeney, Colm
Mcgillicuddy, D. J., Jr.
Hausmann, Ute
|
| Data: |
2016-09
|
| Ano: |
2016
|
| Palavras-chave: |
CO2 flux
Mesoscale eddy
Southern Ocean
Vertical mixing
Nutrient fluxes
|
| Resumo: |
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 (pCO(2)) 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 pCO(2) anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO(2) 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.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00383/49407/49894.pdf
DOI:10.1002/2016JC011714
https://archimer.ifremer.fr/doc/00383/49407/
|
| Editor: |
Amer Geophysical Union
|
| Formato: |
application/pdf
|
| Fonte: |
Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2016-09 , Vol. 121 , N. 9 , P. 6635-6649
|
| Direitos: |
2016. American Geophysical Union. All Rights Reserved.
info:eu-repo/semantics/openAccess
restricted use
|
|
