90Sr and137Cs contents in the surface waters of the adjacent seas of Japan and the North Pacific during 1969 to 1973

1976 ◽  
Vol 32 (5) ◽  
pp. 228-234 ◽  
Author(s):  
Yutaka Nagaya ◽  
Kiyoshi Nakamura
Keyword(s):  
Surface Waters ◽  
North Pacific ◽  
The North ◽  
The North Pacific

scholarly journals Changes of Subtropical North Pacific Radiocarbon and Correlation with Climate Variability

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 15-25 ◽  
Author(s):  
Ellen R M Druffel ◽  
S Griffin ◽  
T P Guilderson ◽  
M Kashgarian ◽  
J Southon ◽  
...  
Keyword(s):  
Surface Waters ◽  
North Pacific ◽  
Physical Mechanism ◽  
Vertical Mixing ◽  
Past Century ◽  
The Past ◽  
The North ◽  
North Pacific Gyre ◽  
The North Pacific

We show that high-precision radiocarbon (Δ14C) measurements from annual bands of a Hawaiian surface coral decreased by 7‰ from AD 1893 to 1952. This decrease is coincident with the Suess Effect, which is mostly due to the dilution of natural levels of 14C by 14C-free fossil fuel CO2. This decrease is equal to that expected in surface waters of the subtropical gyres, and indicates that the surface waters of the North Pacific were in steady state with respect to long term mixing of CO2 during the past century. Correlation between Δ14C and North Pacific gyre sea surface temperatures indicates that vertical mixing local to Hawaii and the North Pacific gyre as a whole is the likely physical mechanism to result in variable Δ14C. Prior to 1920, this correlation starts to break down; this may be related to the non-correlation between biennial Δ14C values in corals from the southwest Pacific and El Niño events observed during this period as well.

Asian Industrial Lead Inputs to the North Pacific Evidenced by Lead Concentrations and Isotopic Compositions in Surface Waters and Aerosols

2011 ◽  
Vol 45 (23) ◽  
pp. 9874-9882 ◽  
Author(s):  
Céline Gallon ◽  
Mara A. Ranville ◽  
Christopher H. Conaway ◽  
William M. Landing ◽  
Clifton S. Buck ◽  
...  
Keyword(s):  
Surface Waters ◽  
North Pacific ◽  
Isotopic Compositions ◽  
The North ◽  
The North Pacific

Nitrate supply from deep to near-surface waters of the North Pacific subtropical gyre

Nature ◽  
2010 ◽  
Vol 465 (7301) ◽  
pp. 1062-1065 ◽  
Author(s):  
Kenneth S. Johnson ◽  
Stephen C. Riser ◽  
David M. Karl
Keyword(s):  
Surface Waters ◽  
North Pacific ◽  
Subtropical Gyre ◽  
North Pacific Subtropical Gyre ◽  
Near Surface ◽  
The North ◽  
Nitrate Supply ◽  
The North Pacific

Distribution and Morphology of the Medusa, Calycopsis nematophora, from the North Pacific Ocean

1965 ◽  
Vol 22 (3) ◽  
pp. 841-847 ◽  
Author(s):  
R. Ward Renshaw
Keyword(s):  
Pacific Ocean ◽  
Surface Waters ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Original Description ◽  
Morphological Characters ◽  
Radial Canal ◽  
The North ◽  
First Time ◽  
The North Pacific

The medusa, Calycopsis nematophora, is reported from the North Pacific for the first time since its original description. It is restricted to arctic-subarctic surface waters. Radial canal variation and other morphological characters are discussed.

scholarly journals Wind and sunlight shape microbial diversity in surface waters of the North Pacific Subtropical Gyre

2015 ◽  
Vol 10 (6) ◽  
pp. 1308-1322 ◽  
Author(s):  
Jessica A Bryant ◽  
Frank O Aylward ◽  
John M Eppley ◽  
David M Karl ◽  
Matthew J Church ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Surface Waters ◽  
North Pacific ◽  
Subtropical Gyre ◽  
North Pacific Subtropical Gyre ◽  
The North ◽  
The North Pacific

scholarly journals Planktonic Archaeal Ether Lipid Origins in Surface Waters of the North Pacific Subtropical Gyre

2021 ◽  
Vol 12 ◽  
Author(s):  
Fuyan Li ◽  
Andy Leu ◽  
Kirsten Poff ◽  
Laura T. Carlson ◽  
Anitra E. Ingalls ◽  
...  
Keyword(s):  
Surface Waters ◽  
Lipid Composition ◽  
North Pacific ◽  
Ether Lipid ◽  
Subtropical Gyre ◽  
Ether Lipids ◽  
North Pacific Subtropical Gyre ◽  
The North ◽  
Tetraether Lipids ◽  
The North Pacific

Thaumarchaeota and Thermoplasmatota are the most abundant planktonic archaea in the sea. Thaumarchaeota contain tetraether lipids as their major membrane lipids, but the lipid composition of uncultured planktonic Thermoplasmatota representatives remains unknown. To address this knowledge gap, we quantified archaeal cells and ether lipids in open ocean depth profiles (0–200 m) of the North Pacific Subtropical Gyre. Planktonic archaeal community structure and ether lipid composition in the water column partitioned into two separate clusters: one above the deep chlorophyll maximum, the other within and below it. In surface waters, Thermoplasmatota densities ranged from 2.11 × 106 to 6.02 × 106 cells/L, while Thaumarchaeota were undetectable. As previously reported for Thaumarchaeota, potential homologs of archaeal tetraether ring synthases were present in planktonic Thermoplasmatota metagenomes. Despite the absence of Thaumarchaeota in surface waters, measurable amounts of intact polar ether lipids were found there. Based on cell abundance estimates, these surface water archaeal ether lipids contributed only 1.21 × 10–9 ng lipid/Thermoplasmatota cell, about three orders of magnitude less than that reported for Thaumarchaeota cells. While these data indicate that even if some tetraether and diether lipids may be derived from Thermoplasmatota, they would only comprise a small fraction of Thermoplasmatota total biomass. Therefore, while both MGI Thaumarchaeota and MGII/III Thermoplasmatota are potential biological sources of archaeal GDGTs, the Thaumarchaeota appear to be the major contributors of archaeal tetraether lipids in planktonic marine habitats. These results extend and confirm previous reports of planktonic archaeal lipid sources, and further emphasize the need for Thermoplasmatota cultivation, to better characterize the membrane lipid constituents of marine planktonic Thermoplasmatota, and more precisely define the sources and patterns of archaeal tetraether lipid distributions in marine plankton.

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