scholarly journals Decadal changes in dissolved inorganic carbon in the Pacific Ocean

2013 ◽  
Vol 27 (1) ◽  
pp. 65-76 ◽  
Author(s):  
Shinya Kouketsu ◽  
Akihiko Murata ◽  
Toshimasa Doi
Keyword(s):  
Pacific Ocean ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
The Pacific ◽  
The Pacific Ocean

scholarly journals Bomb-Produced Carbon-14 in the Surface Water of the Pacific Ocean

Radiocarbon ◽  
1980 ◽  
Vol 22 (3) ◽  
pp. 599-606 ◽  
Author(s):  
Timothy W Linick
Keyword(s):  
Surface Water ◽  
Pacific Ocean ◽  
Surface Waters ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon 14 ◽  
Latitudinal Pattern ◽  
The Pacific ◽  
The Pacific Ocean

The distribution of 14C concentrations in the dissolved inorganic carbon in the surface waters of the Pacific Ocean is shown to have a primarily latitudinal pattern with Δ14C maxima at mid-latitudes in both hemispheres and a minimum at the equator. Oceanographic causes of this phenomenon are discussed.

scholarly journals La Jolla Measurements of Radiocarbon in the Oceans

Radiocarbon ◽  
1978 ◽  
Vol 20 (3) ◽  
pp. 333-359 ◽  
Author(s):  
T W Linick
Keyword(s):  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Doctoral Dissertation ◽  
Carbon 14 ◽  
Surface Samples ◽  
The Pacific ◽  
The Indian Ocean ◽  
The Pacific Ocean ◽  
Seawater Samples ◽  
La Jolla

The La Jolla Radiocarbon Laboratory has measured carbon-14 concentrations in seawater samples collected from 1957 through 1972. The dissolved inorganic carbon in seawater was extracted on board research vessels and was returned to the laboratory for processing and measurement. Both surface and sub-surface samples were collected, primarily from the Pacific Ocean, but also from the Indian Ocean. The purpose of the seawater measurements was to determine the distribution of bomb-produced radiocarbon in the surface water of the Pacific and Indian Oceans, the sub-surface penetration of bomb 14C, the change in 14C/12C ratios with depth, and thus the rate of uptake of bomb 14C by the oceans. This project was the basis of the author's doctoral dissertation (Linick, 1975).

scholarly journals Decadal Changes in Bomb-Produced Radiocarbon in the Pacific Ocean from the 1990s to 2000s

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1641-1650 ◽  
Author(s):  
Yuichiro Kumamoto ◽  
Akihiko Murata ◽  
Takeshi Kawano ◽  
Shuichi Watanabe ◽  
Masao Fukasawa
Keyword(s):  
Pacific Ocean ◽  
Ocean Circulation ◽  
Dissolved Inorganic Carbon ◽  
World Ocean ◽  
Temporal Changes ◽  
Turnover Time ◽  
Subtropical Region ◽  
The North ◽  
The Pacific ◽  
The Pacific Ocean

In the 2000s, radiocarbon in dissolved inorganic carbon was measured during 7 revisit cruises along the lines of the World Ocean Circulation Experiment in the Pacific Ocean. Comparison of 14C data along these lines from the 1990s and 2000s revealed decadal changes of 14C concentration in the thermocline, most of which were due to temporal changes in the bomb-produced 14C. Vertical profiles and vertical-integrated inventories of the bomb 14C in the subarctic and equatorial regions did not change appreciably. In the southern subtropical region, 14C decreased in the upper thermocline from the surface to ∼500 m depth. In contrast, 14C increased in the lower thermocline below ∼500 m depth. The opposing directions in 14C change resulted in small temporal changes in the total inventory of bomb 14C. On the other hand, the water-column inventory significantly decreased in the northwestern subtropical region due to the 14C decrease in the upper thermocline. These decadal changes in bomb 14C indicate that the turnover time of thermocline circulation in the northwestern subtropical region is faster than that in the southern subtropical region, and imply an interbasin transport of bomb 14C from the North Pacific to other basins.

On the Pacific Ocean regime shift

2001 ◽  
Vol 28 (19) ◽  
pp. 3721-3724
Author(s):  
Cathy Stephens
Keyword(s):  
Pacific Ocean ◽  
Regime Shift ◽  
The Pacific ◽  
The Pacific Ocean
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