The distribution of 226Ra in the Atlantic Ocean

W. S. Broecker; J. Goddard; J. L. Sarmiento

doi:10.1016/0012-821X(76)90063-7

The distribution of ²²⁶Ra in the Atlantic Ocean

W. S. Broecker, J. Goddard, J. L. Sarmiento

Research output: Contribution to journal › Article › peer-review

105 Scopus citations

Abstract

Based on results obtained during the GEOSECS program the primary features of the distribution of ²²⁶Ra in the Atlantic Ocean can be defined. Outside the Antarctic no significant variation has been found in the ²²⁶Ra content of surface waters. Eighty samples yield an average of 7.4 dpm/100 kg (normalized to a salinity of 35.00‰). Deep waters in the central Atlantic have ²²⁶Ra contents several dpm/100 kg higher than expected from the mixing of Antarctic Bottom Water (21.3 dpm/100 kg) and basal North Atlantic Deep Water (10.3 dpm/100 kg). These excesses correlate well with deficiencies in O₂ and excesses in SiO₂. The intermediate water ²²⁶Ra maximum in the South Atlantic is associated with the inflow of low-oxygen Circumpolar Intermediate Water beneath the Antarctic Intermediate Water.

Original language	English (US)
Pages (from-to)	220-235
Number of pages	16
Journal	Earth and Planetary Science Letters
Volume	32
Issue number	2
DOIs	https://doi.org/10.1016/0012-821X(76)90063-7
State	Published - Oct 1976

All Science Journal Classification (ASJC) codes

Geophysics
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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10.1016/0012-821X(76)90063-7

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@article{171b79a59c9e43ad85b49cc0d46823ec,

title = "The distribution of 226Ra in the Atlantic Ocean",

abstract = "Based on results obtained during the GEOSECS program the primary features of the distribution of 226Ra in the Atlantic Ocean can be defined. Outside the Antarctic no significant variation has been found in the 226Ra content of surface waters. Eighty samples yield an average of 7.4 dpm/100 kg (normalized to a salinity of 35.00‰). Deep waters in the central Atlantic have 226Ra contents several dpm/100 kg higher than expected from the mixing of Antarctic Bottom Water (21.3 dpm/100 kg) and basal North Atlantic Deep Water (10.3 dpm/100 kg). These excesses correlate well with deficiencies in O2 and excesses in SiO2. The intermediate water 226Ra maximum in the South Atlantic is associated with the inflow of low-oxygen Circumpolar Intermediate Water beneath the Antarctic Intermediate Water.",

author = "Broecker, {W. S.} and J. Goddard and Sarmiento, {J. L.}",

note = "Funding Information: The laboratory extractions were carried out by Sandra Broecker and Jim Fox. Guy Mathieu aided in developing the techniques and in standardizing the procedures. The shipboard measurements were carried out by Robert Trier, Guy Mathieu, Ross Horowitz and Ken LeVielle with the help of many other members of the GEOSECS seagoing group. Discussions with Teh-Lung Ku and Yu-Chia Chung have been helpful in our attempts to improve the precision of our analyses. Financial support for this work has been provided by the National Science Foundation International Decade for Ocean Exploration program (Grant IDO 71-04198).",

year = "1976",

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doi = "10.1016/0012-821X(76)90063-7",

language = "English (US)",

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journal = "Earth and Planetary Science Letters",

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T1 - The distribution of 226Ra in the Atlantic Ocean

AU - Broecker, W. S.

AU - Goddard, J.

AU - Sarmiento, J. L.

N1 - Funding Information: The laboratory extractions were carried out by Sandra Broecker and Jim Fox. Guy Mathieu aided in developing the techniques and in standardizing the procedures. The shipboard measurements were carried out by Robert Trier, Guy Mathieu, Ross Horowitz and Ken LeVielle with the help of many other members of the GEOSECS seagoing group. Discussions with Teh-Lung Ku and Yu-Chia Chung have been helpful in our attempts to improve the precision of our analyses. Financial support for this work has been provided by the National Science Foundation International Decade for Ocean Exploration program (Grant IDO 71-04198).

PY - 1976/10

Y1 - 1976/10

N2 - Based on results obtained during the GEOSECS program the primary features of the distribution of 226Ra in the Atlantic Ocean can be defined. Outside the Antarctic no significant variation has been found in the 226Ra content of surface waters. Eighty samples yield an average of 7.4 dpm/100 kg (normalized to a salinity of 35.00‰). Deep waters in the central Atlantic have 226Ra contents several dpm/100 kg higher than expected from the mixing of Antarctic Bottom Water (21.3 dpm/100 kg) and basal North Atlantic Deep Water (10.3 dpm/100 kg). These excesses correlate well with deficiencies in O2 and excesses in SiO2. The intermediate water 226Ra maximum in the South Atlantic is associated with the inflow of low-oxygen Circumpolar Intermediate Water beneath the Antarctic Intermediate Water.

AB - Based on results obtained during the GEOSECS program the primary features of the distribution of 226Ra in the Atlantic Ocean can be defined. Outside the Antarctic no significant variation has been found in the 226Ra content of surface waters. Eighty samples yield an average of 7.4 dpm/100 kg (normalized to a salinity of 35.00‰). Deep waters in the central Atlantic have 226Ra contents several dpm/100 kg higher than expected from the mixing of Antarctic Bottom Water (21.3 dpm/100 kg) and basal North Atlantic Deep Water (10.3 dpm/100 kg). These excesses correlate well with deficiencies in O2 and excesses in SiO2. The intermediate water 226Ra maximum in the South Atlantic is associated with the inflow of low-oxygen Circumpolar Intermediate Water beneath the Antarctic Intermediate Water.

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JO - Earth and Planetary Science Letters

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ER -

The distribution of ²²⁶Ra in the Atlantic Ocean

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