scholarly journals Role of Trichodesmium spp. in the productivity of the subtropical North Pacific Ocean

1996 ◽  
Vol 133 ◽  
pp. 263-273 ◽  
Author(s):  
RM Letelier ◽  
DM Karl
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean

On the Mechanism of Pacific Multidecadal Climate Variability in CCSM3: The Role of the Subpolar North Pacific Ocean

2009 ◽  
Vol 39 (9) ◽  
pp. 2052-2076 ◽  
Author(s):  
Yafang Zhong ◽  
Zhengyu Liu
Keyword(s):  
Pacific Ocean ◽  
Negative Feedback ◽  
Positive Feedback ◽  
North Pacific ◽  
Rossby Waves ◽  
North Pacific Ocean ◽  
Climate System ◽  
Multidecadal Variability ◽  
Salinity Variability

Abstract Previous analyses of the Community Climate System Model, version 3 (CCSM3) standard integration have revealed pronounced multidecadal variability in the Pacific climate system. The purpose of the present work is to investigate physical mechanism underlying this Pacific multidecadal variability (PMV). To better isolate the mechanism that selects the long multidecadal time scale for the PMV, a few specifically designed sensitivity experiments are carried out. When the propagating Rossby waves are blocked in the subtropics from the midbasin, the PMV remains outstanding. In contrast, when the Rossby waves are blocked beyond the subtropics across the entire North Pacific, the PMV is virtually suppressed. It suggests that the PMV relies on propagating Rossby waves in the subpolar Pacific, whereas those in the subtropics are not critical. A novel mechanism of PMV is advanced based on a more comprehensive analysis, which is characterized by a crucial role of the subpolar North Pacific Ocean. The multidecadal ocean temperature and salinity anomalies may originate from the subsurface of the subpolar North Pacific because of the wave adjustment to the preceding basin-scale wind curl forcing. The anomalies then ascend to the surface and are amplified through local temperature–salinity convective feedback. Along the southward Oyashio, these anomalies travel to the Kuroshio Extension (KOE) region and are further intensified through a similar convective feedback. The oceanic temperature anomaly in the KOE is able to feed back to the large-scale atmospheric circulation, inducing a wind curl anomaly over the subpolar North Pacific, which in turn generates anomalous oceanic circulation and causes temperature and salinity variability in the subpolar subsurface. Thereby, a closed loop of PMV is established in the form of an extratropical delayed oscillator. The phase transition of PMV is driven by the delayed negative feedback that resides in the wave adjustment of the subpolar North Pacific via propagating Rossby waves, whereas the convective positive feedback provides the growth mechanism. A significant role of salinity variability is unveiled in both the delayed negative feedback and convective positive feedback.

Role of sea floor organisms in oxygen consumption in the deep North Pacific Ocean

Nature ◽  
1987 ◽  
Vol 329 (6140) ◽  
pp. 621-623 ◽  
Author(s):  
Richard A. Jahnke ◽  
George A. Jackson
Keyword(s):  
Oxygen Consumption ◽  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Sea Floor

scholarly journals The role of nitrogen fixation in biogeochemical cycling in the subtropical North Pacific Ocean

Nature ◽  
10.1038/41474 ◽  
1997 ◽  
Vol 388 (6642) ◽  
pp. 533-538 ◽  
Author(s):  
D. Karl ◽  
R. Letelier ◽  
L. Tupas ◽  
J. Dore ◽  
J. Christian ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Biogeochemical Cycling

Role of the eastern subtropical North Pacific Ocean on the El Niño’s transition processes

2021 ◽  
Vol 56 (3-4) ◽  
pp. 1285-1301
Author(s):  
Sang-Wook Yeh ◽  
Hyun-Su Jo ◽  
Seung-Hwon Hyun ◽  
Wenju Cai ◽  
Yoo-Geun Ham
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Transition Processes

The role of dissolved organic matter release in the productivity of the oligotrophic North Pacific Ocean

1998 ◽  
Vol 43 (6) ◽  
pp. 1270-1286 ◽  
Author(s):  
David M. Karl ◽  
Dale V. Hebel ◽  
K. Björkman ◽  
R. M. Letelier
Keyword(s):  
Organic Matter ◽  
Pacific Ocean ◽  
Dissolved Organic Matter ◽  
North Pacific ◽  
North Pacific Ocean
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