Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning.
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning.
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DOI:
10.1038/s41467-021-24648-x
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发表时间:
2021-07-16
影响因子:
16.6
通讯作者:
de Lavergne C
中科院分区:
文献类型:
--
作者:
Holzer M;DeVries T;de Lavergne C
Mid-depth North Pacific waters are rich in nutrients and respired carbon accumulated over centuries. The rates and pathways with which these waters exchange with the surface ocean are uncertain, with divergent paradigms of the Pacific overturning: one envisions bottom waters upwelling to 1.5 km depth; the other confines overturning beneath a mid-depth Pacific shadow zone (PSZ) shielded from mean advection. Here global inverse modelling reveals a PSZ where mean ages exceed 1400 years with overturning beneath. The PSZ is supplied primarily by Antarctic and North-Atlantic ventilated waters diffusing from below and from the south. Half of PSZ waters re-surface in the Southern Ocean, a quarter in the subarctic Pacific. The abyssal North Pacific, despite strong overturning, has mean re-surfacing times also exceeding 1400 years because of diffusion into the overlying PSZ. These results imply that diffusive transports – distinct from overturning transports – are a leading control on Pacific nutrient and carbon storage. The deep North Pacific is the end of the road for global ocean circulation, but the circulation patterns and ventilation are poorly understood. Here the authors show that diffusive transports both along and across density layers play a leading role in returning 1,400 year old water to the surface.
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影响因子:
3.2
作者:
Chamberlain, Matthew A.;Matear, Richard J.;Marsland, Simon J.
通讯作者:
Marsland, Simon J.
影响因子:
5.2
作者:
Hall, TM;Holzer, M
通讯作者:
Holzer, M
影响因子:
3.5
作者:
de Lavergne, Casimir;Madec, Gurvan;Garabato, Alberto C. Naveira
通讯作者:
Garabato, Alberto C. Naveira
影响因子:
3.6
作者:
Holzer, Mark;Primeau, Francois W.;Matear, Richard
通讯作者:
Matear, Richard
影响因子:
3.6
作者:
Holzer, Mark;Primeau, Francois W.;Khatiwala, Samar
通讯作者:
Khatiwala, Samar