A 3—Dimensional baroclinic circulation model of the tropical and northern Pacific

1997 ◽  
Vol 15 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Cai Yi ◽  
Li Yu-xiang
Keyword(s):  
Circulation Model ◽  
3 Dimensional ◽  
Baroclinic Circulation ◽  
Northern Pacific

Modelling Penaeid Prawn Larval Advection in Albatross Bay, Australia: Defining the Effective Spawning Population

1996 ◽  
Vol 47 (2) ◽  
pp. 157 ◽  
Author(s):  
PC Rothlisberg ◽  
PD Craig ◽  
JR Andrewartha
Keyword(s):  
Activity Pattern ◽  
Activity Patterns ◽  
Circulation Model ◽  
Flood Tide ◽  
Spatial Extent ◽  
3 Dimensional ◽  
Penaeid Prawn ◽  
Transition Depth

A 3-dimensional numerical circulation model was linked to four larval-postlarval behaviour patterns to establish the origins of postlarvae recruiting into the estuaries adjacent to Albatross Bay, Gulf of Carpentaria, Australia. The area from which these postlarvae originate is called the 'advective envelope' and it delimits the spatial extent of the effective spawning population. The different behaviour scenarios vary the amount of time the postlarvae are active during the flood tide and the depth at which they change between their diel and tidal activity patterns (transition depth). The envelope with a behaviour scenario that incorporated a 20 m transition depth and a 3 h tidal activity pattern was 1000 km2. Incorporation of seasonal winds changed the shape but not the extent of the advective envelopes.

Features of 3‐dimensional barotropic and baroclinic circulation in the Hauraki Gulf, New Zealand

2000 ◽  
Vol 34 (1) ◽  
pp. 1-28 ◽  
Author(s):  
K. P. Black ◽  
R. G. Bell ◽  
J. W. Oldman ◽  
G. S. Carter ◽  
T. M. Hume
Keyword(s):  
New Zealand ◽  
3 Dimensional ◽  
Baroclinic Circulation

scholarly journals On the semi-diagnostic computation of climatological circulation in the western tropical Indian Ocean

MAUSAM ◽  
2021 ◽  
Vol 51 (4) ◽  
pp. 329-348
Author(s):  
C. SHAJI ◽  
A. D. RAO ◽  
S. K. DUBE ◽  
N. BAHULAYAN
Keyword(s):  
Indian Ocean ◽  
Surface Wind ◽  
Diagnostic Technique ◽  
Circulation Model ◽  
Tropical Indian Ocean ◽  
Salt Transport ◽  
3 Dimensional ◽  
Sea Surface Topography ◽  
Salinity Data ◽  
Climatological Circulation

The seasonal mean climatological circulation in the Indian Ocean north of 20°S and west of 80°E during the summer and winter has been investigated using a 3-dimensional, fully non-linear, semi-diagnostic circulation model. The model equations include the basic ocean hydrothermodynamic  equations of momentum, hydrostatics, continuity, sea surface topography and temperature and salt transport equations. Model is driven with the seasonal mean data on wind stress at the ocean surface and thermohaline forcing at different levels. The circulation in the upper levels of the ocean at 20, 50, 150, 300, 500 and 1000 m depths during the two contrasting seasons has been obtained using the model, and the role of steady, local forcing of wind and internal density field on the dynamical balance of circulation in the western tropical Indian Ocean is explained. The climatological temperature and salinity data used to drive the model is found to be hydrodynamically adjusted with surface wind, flow field and bottom relief during the adaptation stages. Semi-diagnostic technique is found to be very effective for the smoothening of climatic temperature and salinity data and also to obtain the 3-dimensional steady state circulation, which would serve as initial condition in simulation models of circulation.

scholarly journals Marine denitrification rates determined from a global 3-dimensional inverse model

2012 ◽  
Vol 9 (10) ◽  
pp. 14013-14052 ◽  
Author(s):  
T. DeVries ◽  
C. Deutsch ◽  
P. A. Rafter ◽  
F. Primeau
Keyword(s):  
Ocean Circulation ◽  
Isotopic Ratio ◽  
Circulation Model ◽  
Simple Relationship ◽  
N Losses ◽  
3 Dimensional ◽  
Global Rate ◽  
Nitrate Consumption ◽  
The Difference

Abstract. A major impediment to understanding long-term changes in the marine nitrogen (N) cycle is the persistent uncertainty about the rates, distribution, and sensitivity of its largest fluxes in the modern ocean. We use a global 3-dimensional ocean circulation model to obtain the first estimate of marine denitrification rates that is maximally consistent with available observations of nitrate deficits and the nitrogen isotopic ratio of ocean nitrate. We find a global rate of marine denitrification in suboxic waters and sediments of 120–240 Tg N yr−1, which is lower than most other recent estimates. The difference stems from the ability to represent the 3-D spatial structure of suboxic zones, where denitrification rates of 50–77 Tg N yr−1 result in up to 50% depletion of nitrate. This depletion reduces the effect of local isotopic enrichment on the rest of the ocean, allowing the N isotope ratio of oceanic nitrate to be achieved with a sedimentary denitrification rate about 1.3–2.3 times that of suboxic zones. This balance of N losses between sediments and suboxic zones is shown to obey a simple relationship between isotope fractionation and the degree of nitrate consumption in the core of the suboxic zones. The global denitrification rates derived here suggest that the marine nitrogen budget is likely close to balanced.

scholarly journals Impact of tides in a baroclinic circulation model of the Adriatic Sea

2013 ◽  
Vol 118 (1) ◽  
pp. 166-183 ◽  
Author(s):  
A. Guarnieri ◽  
N. Pinardi ◽  
P. Oddo ◽  
G. Bortoluzzi ◽  
M. Ravaioli
Keyword(s):  
Adriatic Sea ◽  
Circulation Model ◽  
Baroclinic Circulation

On the Ability of Synchronously Rotating Planets to Support Atmospheres

1997 ◽  
Vol 161 ◽  
pp. 351-357
Author(s):  
Manoj M. Joshi ◽  
Robert M. Haberle
Keyword(s):  
Circulation Model ◽  
The Other ◽  
Dark Side ◽  
Global Circulation Model ◽  
3 Dimensional ◽  
Global Circulation ◽  
Habitable Zones ◽  
Night Side ◽  
M Stars ◽  
The Universe

AbstractPlanets within the habitable zones of M stars are likely to be synchronous rotators, i.e., one side is permanently illuminated while the other side is in perpetual darkness. For such planets to be habitable, horizontal atmospheric motions must be capable of transporting enough heat from the day side to the night side to prevent the atmosphere from freezing out. Simple calculations have shown that the equivalent of approximately 150 mb of CO2is required to prevent atmospheric condensation on the dark side. We now use a 3-dimensional global circulation model in order to better assess the ability of these planets to sustain an atmosphere. The results of this work show that for an earth-sized planet, 100 mb of CO2is required to support an atmosphere, while 1-2 bars are sufficient to allow liquid water everywhere. Planetary systems associated with M stars should therefore not be ruled out in the search for life in the universe.

Model Study of the Water Exchange in a Shallow Bay

2013 ◽  
Vol 726-731 ◽  
pp. 3439-3442
Author(s):  
Hao Liu ◽  
Dan Luo ◽  
Hong Xuan Kang ◽  
Bao Shu Yin
Keyword(s):  
Water Exchange ◽  
Circulation Model ◽  
Tidal Prism ◽  
3 Dimensional ◽  
Model Study ◽  
Term Variation ◽  
Enclosed Bay ◽  
Coastal Circulation Model ◽  
Shallow Bay

Both the tidal prism and the water exchange duration can be used as the index of examining the residence time of the pollutants in a semi-enclosed bay, and it is significant to predict the long-term variation of water quality. A 3-dimensional coastal circulation model is used to reproduce the tidal regime in the Shenhu Bay. Simulated tidal currents are examined first, and the then the tidal prism is also compared to observations. Based on the validated simulations, the water exchange duration is further estimated by means of the numerical experiment. The simulations show that the half-exchange and 80%-exchange time are about 14 and 30 d, respectively.

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