Ship-borne observations of sea fog and rain chemistry over the North and South Pacific Ocean

2019 ◽  
Vol 76 (4) ◽  
pp. 315-326 ◽  
Author(s):  
Hyun Jae Kim ◽  
Taehyoung Lee ◽  
Taehyun Park ◽  
Gyutae Park ◽  
Jeffrey L. Collett ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
South Pacific ◽  
Sea Fog ◽  
The North ◽  
South Pacific Ocean ◽  
North And South

scholarly journals Phosphate monoesterase and diesterase activities in the North and South Pacific Ocean

2013 ◽  
Vol 10 (11) ◽  
pp. 7677-7688 ◽  
Author(s):  
M. Sato ◽  
R. Sakuraba ◽  
F. Hashihama
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
Western North Pacific ◽  
South Pacific ◽  
Turnover Time ◽  
The North ◽  
South Pacific Ocean ◽  
The Pacific ◽  
The Pacific Ocean ◽  
North And South

Abstract. Phosphate monoesterase and diesterase activities were measured with soluble reactive phosphorus (SRP) and labile and total dissolved organic phosphorus (DOP) concentrations in the North and South Pacific Ocean, to reveal the microbial utilization of phosphate esters in the Pacific Ocean. Both esterase activities were noticeably enhanced around the western part of 30° N, where the surface SRP concentration was below 10 nM, while they showed no significant correlation with DOP concentration. The proportion of the activity in the dissolved fraction was higher for diesterase than monoesterase, which may support results from previous genomic analyses. Substrate affinity and the maximum hydrolysis rate of monoesterase were the highest at lower concentrations of SRP, showing the adaptation of microbes to inorganic phosphorus nutrient deficiency at the molecular level. The calculated turnover time of monoesters was 1 to 2 weeks in the western North Pacific Ocean, which was much shorter than the turnover time in other areas of the Pacific Ocean but longer than the turnover time in other phosphate-depleted areas. In contrast, the turnover rate of diesters was calculated to exceed 100 days, revealing that diesters in the western North Pacific were a biologically refractory phosphorus fraction. In the present study, it was revealed that both phosphate monoesters and diesters can be a phosphorus source for microbes in the phosphate-depleted waters, although the dynamics of the two esters are totally different.

Toxaphene and other persistent organochlorine pesticides in three species of albatrosses from the north and south Pacific Ocean

2002 ◽  
Vol 21 (2) ◽  
pp. 413-423 ◽  
Author(s):  
Derek C. G. Muir ◽  
Paul D. Jones ◽  
Heidi Karlsson ◽  
Krystina Koczansky ◽  
Gary A. Stern ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Organochlorine Pesticides ◽  
South Pacific ◽  
Persistent Organochlorine ◽  
The North ◽  
South Pacific Ocean ◽  
North And South

Deep circulation in the Lau Basin and Havre Trough of the western South Pacific Ocean from floats and hydrography

2019 ◽  
Vol 77 (5) ◽  
pp. 353-374
Author(s):  
Elizabeth Simons ◽  
Kevin Speer ◽  
Andreas M. Thurnherr
Keyword(s):  
Pacific Ocean ◽  
Circulation Model ◽  
South Pacific ◽  
Western Boundary Current ◽  
Western Boundary ◽  
Boundary Current ◽  
Lau Basin ◽  
The North ◽  
South Pacific Ocean ◽  
North Fiji Basin

A system of meridional ridges in the western South Pacific Ocean frame the Lau Basin and Havre Trough, and form a barrier to direct communication between the far western South Pacific basins and the interior South Pacific Ocean. The eastern side of this system comprises the Tonga and Kermadec Ridges, the location of the main deep western boundary current entering the Pacific Ocean. Observations from floats released in the Lau Basin as part of the RIDGE2000 program suggested the presence of a western boundary current along the Lau Ridge exiting into the North Fiji Basin. Those observations, together with Argo sub-surface float data and repeat hydrographic sections, confirm and expand the boundary current observations along the Lau Ridge throughout the Lau Basin and into the Havre Trough, along the Colville Ridge. The observations also reveal two previously unrecognized westward flowing jets bisecting the Lau Basin and Havre Trough. Using an extension to the classic Stommel-Arons abyssal circulation model, the predicted strength and location of these boundary currents and their bifurcation is compared with the float observations. The model provides a simplified view of the dynamics controlling the boundary current structure in the deep basins. A comparison of transport within the western boundary current derived from float data, hydrographic sections, and the idealized analytical model indicates that roughly 4 Sv (below 1,000 db) is transported northward through the Lau Basin, exiting into the North Fiji Basin.

scholarly journals Phosphate monoesterase and diesterase activities in the North and South Pacific Ocean

2013 ◽  
Vol 10 (6) ◽  
pp. 10095-10124 ◽  
Author(s):  
M. Sato ◽  
R. Sakuraba ◽  
F. Hashihama
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
Western North Pacific ◽  
Biogeochemical Cycling ◽  
Turnover Time ◽  
The North ◽  
South Pacific Ocean ◽  
The Pacific ◽  
The Pacific Ocean ◽  
North And South

Abstract. To reveal the biogeochemical cycling of phosphorus in the Pacific Ocean, phosphate monoesterase and diesterase activities were measured with soluble reactive phosphorus (SRP) and labile and total dissolved organic phosphorus (DOP) concentrations in the North and South Pacific Ocean. Both esterase activities were noticeably enhanced around the western part of 30° N, where the surface SRP concentration was below 10 nM, while they showed no significant correlation with DOP concentration. The proportion of the activity in the dissolved fraction was higher for diesterase than monoesterase, which may support results from previous genomic analyses. Substrate affinity and the maximum hydrolysis rate of monoesterase were the highest at lower concentrations of SRP, showing the adaptation of microbes to inorganic phosphorus nutrient deficiency at the molecular level. The calculated turnover time of monoesters was 1 to 2 weeks in the western North Pacific Ocean, which was much shorter than the turnover time in other areas of the Pacific Ocean but longer than the turnover time in other phosphate-depleted areas. In contrast, the turnover rate of diesters was calculated to exceed 100 days, revealing that diesters in the western North Pacific were a biologically refractory phosphorus fraction. In future studies, a combination of molecular biological techniques and kinetic studies will reveal the entire process of biogeochemical cycling of phosphorus in the ocean, including components that were not elucidated in the present study.

Carbon monoxide in the South Pacific Ocean

Tellus ◽  
1974 ◽  
Vol 26 (1-2) ◽  
pp. 136-142 ◽  
Author(s):  
J. W. Swinnerton ◽  
R. A. Lamontagne
Keyword(s):  
Carbon Monoxide ◽  
Pacific Ocean ◽  
South Pacific ◽  
The South ◽  
South Pacific Ocean
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