Bibliographies thématiques / Equatorial and regional oceanography

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Littérature scientifique sur le sujet « Equatorial and regional oceanography »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Equatorial and regional oceanography"

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Jouanno, Julien, Frédéric Marin, Yves du Penhoat et Jean-Marc Molines. « Intraseasonal Modulation of the Surface Cooling in the Gulf of Guinea ». Journal of Physical Oceanography 43, no 2 (1 février 2013) : 382–401. http://dx.doi.org/10.1175/jpo-d-12-053.1.

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Abstract A regional numerical model of the tropical Atlantic Ocean and observations are analyzed to investigate the intraseasonal fluctuations of the sea surface temperature at the equator in the Gulf of Guinea. Results indicate that the seasonal cooling in this region is significantly shaped by short-duration cooling events caused by wind-forced equatorial waves: mixed Rossby–gravity waves within the 12–20-day period band, inertia–gravity waves with periods below 11 days, and equatorially trapped Kelvin waves with periods between 25 and 40 days. In these different ranges of frequencies, it is shown that the wave-induced horizontal oscillations of the northern front of the mean cold tongue dominate the variations of mixed layer temperature near the equator. But the model mixed layer heat budget also shows that the equatorial waves make a significant contribution to the mixed layer heat budget through modulation of the turbulent cooling, especially above the core of the Equatorial Undercurrent (EUC). The turbulent cooling variability is found to be mainly controlled by the intraseasonal modulation of the vertical shear in the upper ocean. This mechanism is maximum during periods of seasonal cooling, especially in boreal summer, when the surface South Equatorial Current is strongest and between 2°S and the equator, where the presence of the EUC provides a background vertical shear in the upper ocean. It applies for the three types of intraseasonal waves. Inertia–gravity waves also modulate the turbulent heat flux at the equator through vertical displacement of the core of the EUC in response to equatorial divergence and convergence.
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Holmes, R. M., et L. N. Thomas. « The Modulation of Equatorial Turbulence by Tropical Instability Waves in a Regional Ocean Model ». Journal of Physical Oceanography 45, no 4 (avril 2015) : 1155–73. http://dx.doi.org/10.1175/jpo-d-14-0209.1.

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AbstractSmall-scale turbulent mixing in the upper Equatorial Undercurrent (EUC) of the eastern Pacific cold tongue is a critical component of the SST budget that drives variations in SST on a range of time scales. Recent observations have shown that turbulent mixing within the EUC is modulated by tropical instability waves (TIWs). A regional ocean model is used to investigate the mechanisms through which large-scale TIW circulation modulates the small-scale shear, stratification, and shear-driven turbulence in the EUC. Eulerian analyses of time series taken from both the model and the Tropical Atmosphere Ocean (TAO) array suggest that increases in the zonal shear of the EUC drive increased mixing on the leading edge of the TIW warm phase. A Lagrangian vorticity analysis attributes this increased zonal shear to horizontal vortex stretching driven by the strain in the TIW horizontal velocity field acting on the existing EUC shear. To investigate the impact of horizontal vortex stretching on the turbulent heat flux averaged over a TIW period the effects of periodic TIW strain are included as forcing in a simple 1D mixing model of the EUC. Model runs with TIW forcing show turbulent heat fluxes up to 30% larger than runs without TIW forcing, with the magnitude of the increase being sensitive to the vertical mixing scheme used in the model. These results emphasize the importance of coupling between the large-scale circulation and small-scale turbulence in the equatorial regions, with implications for the SST budget of the equatorial Pacific.
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Cherian, D. A., D. B. Whitt, R. M. Holmes, R. C. Lien, S. D. Bachman et W. G. Large. « Off-Equatorial Deep-Cycle Turbulence Forced by Tropical Instability Waves in the Equatorial Pacific ». Journal of Physical Oceanography 51, no 5 (mai 2021) : 1575–93. http://dx.doi.org/10.1175/jpo-d-20-0229.1.

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AbstractThe equatorial Pacific cold tongue is a site of large heat absorption by the ocean. This heat uptake is enhanced by a daily cycle of shear turbulence beneath the mixed layer—“deep-cycle turbulence”—that removes heat from the sea surface and deposits it in the upper flank of the Equatorial Undercurrent. Deep-cycle turbulence results when turbulence is triggered daily in sheared and stratified flow that is marginally stable (gradient Richardson number Ri ≈ 0.25). Deep-cycle turbulence has been observed on numerous occasions in the cold tongue at 0°, 140°W, and may be modulated by tropical instability waves (TIWs). Here we use a primitive equation regional simulation of the cold tongue to show that deep-cycle turbulence may also occur off the equator within TIW cold cusps where the flow is marginally stable. In the cold cusp, preexisting equatorial zonal shear uz is enhanced by horizontal vortex stretching near the equator, and subsequently modified by horizontal vortex tilting terms to generate meridional shear υz off of the equator. Parameterized turbulence in the sheared flow of the cold cusp is triggered daily by the descent of the surface mixing layer associated with the weakening of the stabilizing surface buoyancy flux in the afternoon. Observational evidence for off-equatorial deep-cycle turbulence is restricted to a few CTD casts, which, when combined with shear from shipboard ADCP data, suggest the presence of marginally stable flow in TIW cold cusps. This study motivates further observational campaigns to characterize the modulation of deep-cycle turbulence by TIWs both on and off the equator.
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Couvelard, Xavier, Patrick Marchesiello, Lionel Gourdeau et Jerome Lefèvre. « Barotropic Zonal Jets Induced by Islands in the Southwest Pacific ». Journal of Physical Oceanography 38, no 10 (1 octobre 2008) : 2185–204. http://dx.doi.org/10.1175/2008jpo3903.1.

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Abstract The oceanic circulation entering the tropical southwest Pacific (SWP) is dominated by the broad westward flow of the South Equatorial Current (SEC), which is forced by the trade winds. It has been argued that the numerous islands of the SWP are able to restructure the SEC into a series of deep and narrow zonal jets, which control important pathways connecting equatorial and extraequatorial signals. The primary objective of this paper is to improve the understanding of the structure and dynamics of SWP zonal jets, giving special attention to topographic effects. This study is based on the use of a high-resolution regional oceanic model, whose solution is compared with observations, as well as with solutions from global models and the Sverdrup relation. The model used here indicates that the regional topography drives a general equatorward shift of the SEC, which is beneficial to the North Fiji, North Vanuatu, and North Caledonian jets. A depth-integrated vorticity budget shows that this topographic effect is considerably attenuated by baroclinicity and advection processes, but not to the point of total compensation as often admitted for the interior ocean. The effect of nonlinear advection is to allow flow rectification of the jets fluctuations, taking the form of zonally elongated dipole circulations in the leeward side of the islands.
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Lindstrom, Eric, James Edson, Julian Schanze et Andrey Shcherbina. « SPURS-2 : Salinity Processes in the Upper-Ocean Regional Study 2 – The Eastern Equatorial Pacific Experiment ». Oceanography 32, no 2 (1 juin 2019) : 15–19. http://dx.doi.org/10.5670/oceanog.2019.207.

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Ouyang, Yating, Yuhong Zhang, Jianwei Chi, Qiwei Sun et Yan Du. « Regional difference of sea surface salinity variations in the western tropical pacific ». Journal of Oceanography 77, no 4 (27 février 2021) : 647–57. http://dx.doi.org/10.1007/s10872-021-00598-2.

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AbstractRegional difference of sea surface salinity (SSS) variations in the western tropical Pacific is investigated with Ocean Reanalysis System 5 datasets. Three robust zonal bands of SSS variations have been identified in the northwestern tropical Pacific (NWTP), the western equatorial tropical Pacific (WEqP), and the southwestern tropical Pacific (SWTP), respectively. SSS in the WEqP and the SWTP has a strong interannual variability that is related to ENSO. In the WEqP, SSS variations are mainly controlled by anomalous freshwater flux, while in the SWTP they are governed by both freshwater forcing and oceanic processes. In the NWTP, SSS variations present a low-frequency variability that is correlated with Interdecadal Pacific Oscillation (IPO), which is mostly dominated by the freshwater flux and strongly adjusted by the ocean advection and mixed layer changes. After removing interannual signals, the SSS in all three regions are highly related to IPO, indicating that IPO has a general influence on the western tropical Pacific.
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Johnson, Gregory C. « Generation and Initial Evolution of a Mode Water θ–S Anomaly* ». Journal of Physical Oceanography 36, no 4 (1 avril 2006) : 739–51. http://dx.doi.org/10.1175/jpo2895.1.

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Abstract Generation and evolution of an isopycnal potential temperature–salinity (θ–S), or spiciness, anomaly is studied around 20°–23°S, 110°W in the austral winter of 2004. Two profiling CTD floats deployed in the region in January 2004 provide the observations. The anomaly (defined as relative to water properties of the preceding summer) is very large (initially about 0.35 in S and about 0.9°C in θ). It is associated with the winter ventilation of a thick, low-potential-vorticity layer known as South Pacific Eastern Subtropical Mode Water. Regional lateral θ and S distributions at the surface predispose the ocean to formation of this water mass and allow significant anomalies to be generated there with relative ease. The water mass is potentially important for climate in that, after northwestward advection in the South Equatorial Current, it contributes to the Equatorial Undercurrent and eventually resurfaces in the cold tongue of the eastern equatorial Pacific Ocean. The anomaly studied is strong enough to predispose a portion of the water column to salt fingering, increasing vertical mixing. Although lateral processes are no doubt important in evolution of the anomaly, the vertical mixing appears to be sufficiently vigorous to reduce it significantly within 6 months after its formation by spreading it to denser horizons through diapycnal fluxes. By that time the anomaly is most likely sufficiently diffuse so that subsequent evolution from diapycnal fluxes is significantly reduced as it makes its way toward the equator.
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Chen, Gengxin, Dongxiao Wang, Weiqing Han, Ming Feng, Fan Wang, Yuanlong Li, Ju Chen et Arnold L. Gordon. « The Extreme El Niño Events Suppressing the Intraseasonal Variability in the Eastern Tropical Indian Ocean ». Journal of Physical Oceanography 50, no 8 (1 août 2020) : 2359–72. http://dx.doi.org/10.1175/jpo-d-20-0041.1.

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AbstractIn the eastern tropical Indian Ocean, intraseasonal variability (ISV) affects the regional oceanography and marine ecosystems. Mooring and satellite observations documented two periods of unusually weak ISV during the past two decades, associated with suppressed baroclinic instability of the South Equatorial Current. Regression analysis and model simulations suggest that the exceptionally weak ISVs were caused primarily by the extreme El Niño events and modulated to a lesser extent by the Indian Ocean dipole. Additional observations confirm that the circulation balance in the Indo-Pacific Ocean was disrupted during the extreme El Niño events, impacting the Indonesian Throughflow Indian Ocean dynamics. This research provides substantial evidence for large-scale modes modulating ISV and the abnormal Indo-Pacific dynamical connection during extreme climate modes.
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Wijffels, Susan E., Gary Meyers et J. Stuart Godfrey. « A 20-Yr Average of the Indonesian Throughflow : Regional Currents and the Interbasin Exchange ». Journal of Physical Oceanography 38, no 9 (1 septembre 2008) : 1965–78. http://dx.doi.org/10.1175/2008jpo3987.1.

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Abstract Twenty years of monthly or more frequent repeat expendable bathythermograph data are used to estimate the mean geostrophic velocity and transport relative to 750 m of the Indonesian Throughflow (ITF) and its partitioning through the major outflow straits into the Indian Ocean. Ekman transports are estimated from satellite and atmospheric reanalysis wind climatologies. A subsurface maximum near 100 m characterizes the geostrophic ITF, but Ekman flows drive a warm near-surface component as well. A subsurface intensified fresh Makassar Jet feeds the Lombok Strait Throughflow (∼2 Sv; 1Sv ≡ 106 m3 s−1) and an eastward flow along the Nusa Tenggara island chain [the Nusa Tenggara Current (6 Sv)]. This flow feeds a relatively cold 3.0-Sv flow through the Ombai Strait and Savu Sea. About 4–5 Sv pass through Timor Passage, fed by both the Nusa Tenggara Current and likely warmer and saltier flow from the eastern Banda Sea. The Ombai and Timor Throughflow feature distinctly different shear profiles; Ombai has deep-reaching shear with a subsurface velocity maximum near 150 m and so is cold (∼15.5°–17.1°C), while Timor Passage has a surface intensified flow and is warm (∼21.6°–23°C). At the western end of Timor Passage the nascent South Equatorial Current is augmented by recirculation from a strong eastward shallow flow south of the passage. South of the western tip of Java are two mean eastward flows—the very shallow, warm, and fresh South Java Current and a cold salty South Java Undercurrent. These, along with the inflow of the Eastern Gyral Current, recirculate to augment the South Equatorial Current, and greatly increase its salinity compared to that at the outflow passages. The best estimate of the 20-yr-average geostrophic plus Ekman transport is 8.9 ± 1.7 Sv with a transport-weighted temperature of 21.2°C and transport-weighted salinity of 34.73 near 110°E. The warm temperatures of the flow can be reconciled with the much cooler estimates based on mooring data in Makassar Strait by accounting for an unmeasured barotropic and deep component, and local surface heat fluxes that warm the ITF by 2°–4°C during its passage through the region.
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Tchilibou, Michel, Lionel Gourdeau, Rosemary Morrow, Guillaume Serazin, Bughsin Djath et Florent Lyard. « Spectral signatures of the tropical Pacific dynamics from model and altimetry : a focus on the meso-/submesoscale range ». Ocean Science 14, no 5 (24 octobre 2018) : 1283–301. http://dx.doi.org/10.5194/os-14-1283-2018.

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Abstract. The processes that contribute to the flat sea surface height (SSH) wavenumber spectral slopes observed in the tropics by satellite altimetry are examined in the tropical Pacific. The tropical dynamics are first investigated with a 1∕12∘ global model. The equatorial region from 10∘ N to 10∘ S is dominated by tropical instability waves with a peak of energy at 1000 km wavelength, strong anisotropy, and a cascade of energy from 600 km down to smaller scales. The off-equatorial regions from 10 to 20∘ latitude are characterized by a narrower mesoscale range, typical of midlatitudes. In the tropics, the spectral taper window and segment lengths need to be adjusted to include these larger energetic scales. The equatorial and off-equatorial regions of the 1∕12∘ model have surface kinetic energy spectra consistent with quasi-geostrophic turbulence. The balanced component of the dynamics slightly flattens the EKE spectra, but modeled SSH wavenumber spectra maintain a steep slope that does not match the observed altimetric spectra. A second analysis is based on 1∕36∘ high-frequency regional simulations in the western tropical Pacific, with and without explicit tides, where we find a strong signature of internal waves and internal tides that act to increase the smaller-scale SSH spectral energy power and flatten the SSH wavenumber spectra, in agreement with the altimetric spectra. The coherent M2 baroclinic tide is the dominant signal at ∼140 km wavelength. At short scales, wavenumber SSH spectra are dominated by incoherent internal tides and internal waves which extend up to 200 km in wavelength. These incoherent internal waves impact space scales observed by today's along-track altimetric SSH, and also on the future Surface Water Ocean Topography (SWOT) mission 2-D swath observations, raising the question of altimetric observability of the shorter mesoscale structures in the tropics.
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Thèses sur le sujet "Equatorial and regional oceanography"

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King, B. A. « Loquency waves in equatorial oceans ». Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373656.

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Chapman, A. S. « Models of the equatorial Atlantic Ocean ». Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267522.

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Dunne, John P. « Measured and modeled particle export in equatorial and coastal upwelling regions / ». Thesis, Connect to this title online ; UW restricted, 1999. http://hdl.handle.net/1773/11043.

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Soares, Jacyra Ramos. « On the reflection of the equatorial waves at eastern ocean boundaries ». Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239653.

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Preece, Rachel Clare. « The physiological response of equatorial neogene bathyal benthic foraminifera to low oxygen ». Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314094.

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Ibrahim, Zelina Zaiton. « An integrated approach to the investigation of an equatorial estuary : the Klang River Estuary, Malaysia ». Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328682.

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Huerta-Casas, Adriana M. « On the heat budget in the equatorial Pacific in the ¼ of degree OCCAM simulation ». Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/45993/.

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Brentnall, Stuart James. « The impact of the Galapagos Islands on the dynamics of the equatorial East Pacific ». Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/42082/.

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Small changes in the sea-surface temperature (SST) distribution in the equatorial Pacific are known to have large consequences for the weather and climate on regional and even global scales. A detailed knowledge of the SST patterns is therefore necessary if we are to understand and predict these effects thoroughly. Effort has hitherto been concentrated on understanding the dynamics of the West Pacific Warm Pool, but attention is now shifting to the eastern Cold Tongue region. This thesis contributes to this programme by assessing the impact of one unique feature of the equatorial East Pacific; the presence on the equator of a medium-sized island group - the Galapagos Archipelago. The project is carried through using a combination of: in situ oceanographic data from ships and moorings; satellite SST and colour images; and diagnostics from both a sophisticated ocean general circulation model and a simplified (reduced gravity) model. Each model was run both with and without a representation of the Galapagos. It is found that under typical conditions the islands form the eastern boundary of the cold tongue; the lowest equatorial SSTs in the Pacific occur on the west coast of the main islands of the group. As well as preventing the cold tongue from extending any further east, the islands also cool the sea surface still further for a distance of some 1000 km to the west. For the first 100 km or so the cooling is of the order of 1C; on the larger scale it is more like 0.1C. This cooling is a result of hydraulically enhanced upwelling of waters from the Equatorial Undercurrent (EUC), which is best explained by a Bernoulli-type (non-rotating, non-linear) theory. This theory also predicts that water parcels in the EUC will undergo vertical excursions on their passage around the north and south coasts of the islands; these excursions are observed in at least one numerical model. Downstream of the archipelago the EUC usually reunites and executes inertial oscillations, meandering about the equator. Transport in the EUC is also reduced because of the presence of the islands, by 30-50% to the east of the islands and by up to 20% to the west. Enhanced SST variability north and south of the equator immediately to the west of the Galapagos indicates that tropical instability waves (TIWs) are more active here than they would be were the islands absent. This is due to a pair of barotropically unstable zonal jets originating at the northern and southern tips of the islands. These jets are consistent with the theory of low-frequency flow past equatorial islands on the beta plane (which predicts that the South Equatorial Current will split into two such jets on encountering such an island), although weaker jets are found in models with no representation of the Galapagos. As with the cold tongue, the islands form the eastern limit of the region where these jets are found.
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Wacongne, Sophie. « Dynamics of the equatorial undercurrent and its determination ». Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/58533.

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Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988.
Includes bibliographical references (v.2, leaves 339-351).
This study focuses on the zonal weakening, eastern termination and seasonal variations of the Atlantic equatorial undercurrent (EUC). The main and most original contribution of the dissertation is a detailed analysis of the Atlantic EUC simulated by Philander and Pacanowski's (1986)general circulation model (GCM), which provides a novel description of the dynamical regimes governing various regions of a nonlinear stratified undercurrent. Only in a narrow deep western region of the simulation does one find an approximately inertial regime corresponding to zonal acceleration. Elsewhere frictional processes cannot be ignored. The bulk of the mid-basin model EUC terminates in the overlying westward surface flow while only a small fraction (the deeper more inertial layers) terminates at the eastern coast. In agreement with observations, a robust feature of the GCM not present in simpler models is the apparent migration of the EUC core from above the thermocline in the west to below it in the east. In the GCM, this happens because the eastward flow is eroded more efficiently by vertical friction above the base of the thermocline than by lateral friction at greater depths. This mechanism is a plausible one for the observed EUC. A scale analysis using a depth scale which decreases with distance eastwards predicts the model zonal transition between western inertial and eastern inertio-frictional regimes. Historical and recent observations and simple models of the equatorial and coastal eastern undercurrents are reviewed, and a new analysis of current measurements in the eastern equatorial Atlantic is presented. Although the measurements are inadequate for definitive conclusions, they suggest that Lukas' (1981) claim of a spring surge of the Pacific EUC to the eastern coast and a seasonal branching of the EUC into a coastal southeastward undercurrent may also hold for the Atlantic Ocean. To improve the agreement between observed and modelled strength of the eastern undercurrent, it is suggested that the eddy coefficient of horizontal mixing should be reduced in future GCM simulations.
by Sophie Huguette Claire Wacongne.
Ph.D.
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Brady, Esther C. « Observations of wave-mean flow interaction in the Pacific equatorial undercurrent ». Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/51482.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, and, Woods Hole Oceanographic Institution, 1991.
GRSN 539404
Includes bibliographical references (p. 207-216).
by Esther Collison Brady.
Ph.D.
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Livres sur le sujet "Equatorial and regional oceanography"

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Regional satellite oceanography. London : Taylor & Francis, 1996.

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Jet Propulsion Laboratory (U.S.), dir. Annual and longitudinal variations of the Pacific North equatorial countercurrent. Pasadena, Calif : National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1992.

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Stuart, Godfrey J., dir. Regional oceanography : An introduction. Oxford, England : Pergamon, 1994.

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Ries, Harry J. The climatological seasonal response of the ocean mixed layer in the equatorial and tropical Pacific Ocean. Monterey, California : Naval Postgraduate School, 1988.

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T, Lantry, et Atlantic Oceanographic and Meteorological Laboratories, dir. Chemical and hydrographic measurements from the equatorial Pacific during boreal spring, 1992. Miami, Fla : Atlantic Oceanographic and Metrological Laboratory, 1995.

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editor, Zhan Sen 1964, dir. Taiwan qu yu hai yang xue : Regional oceanography of Taiwan. Taibei Shi : Tai da chu ban zhong xin, 2018.

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Taiwan qu yu hai yang xue : Regional Oceanography of Taiwan. Taibei Shi : Taiwan da xue chu ban zhong xin, 2014.

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McClatchie, Sam. Regional Fisheries Oceanography of the California Current System. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7223-6.

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E, McTaggart K., dir. CTD measurements during 1993 and 1994 as part of the equatorial Pacific Ocean climate studies (EPOCS). Seattle, Wash : Pacific Marine Environmemtal Laboratory, 1996.

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E, McTaggart K., et Pacific Marine Environmental Laboratory (U.S.), dir. CTD measurements during 1993 and 1994 as part of the Equatorial Pacific Ocean Climate Studies (EPOCS). Seattle, Wash : U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1996.

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Chapitres de livres sur le sujet "Equatorial and regional oceanography"

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Malačič, Vlado, Boris Petelin, Miroslav Gačić, Antonio Artegiani et Mirko Orlić. « Regional Studies ». Dans Physical Oceanography of the Adriatic Sea, 167–216. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9819-4_6.

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Zhu, Jiang. « Overview of Regional and Coastal Systems ». Dans Operational Oceanography in the 21st Century, 413–39. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0332-2_17.

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McClatchie, Sam. « Introduction to the Fisheries and the Surveys ». Dans Regional Fisheries Oceanography of the California Current System, 1–11. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_1.

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McClatchie, Sam. « Oceanography of the Southern California Current System Relevant to Fisheries ». Dans Regional Fisheries Oceanography of the California Current System, 13–60. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_2.

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McClatchie, Sam. « Classic CalCOFI ». Dans Regional Fisheries Oceanography of the California Current System, 61–75. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_3.

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McClatchie, Sam. « Scales of Variability Relevant to Fisheries in the Southern California Current System ». Dans Regional Fisheries Oceanography of the California Current System, 77–138. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_4.

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McClatchie, Sam. « Insights for Fisheries from Experimental and Predation Studies ». Dans Regional Fisheries Oceanography of the California Current System, 139–50. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_5.

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McClatchie, Sam. « Fisheries Stock Assessment, Environmental Variability, and CalCOFI ». Dans Regional Fisheries Oceanography of the California Current System, 151–64. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_6.

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McClatchie, Sam. « The New CalCOFI and Fisheries ». Dans Regional Fisheries Oceanography of the California Current System, 165–74. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_7.

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McClatchie, Sam. « Perspectives on CalCOFI ». Dans Regional Fisheries Oceanography of the California Current System, 175–213. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7223-6_8.

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Actes de conférences sur le sujet "Equatorial and regional oceanography"

1

Santala, Markku. « Examining Variations in West of Shetlands Current Profile Shapes in Light of Regional Oceanography ». Dans Offshore Technology Conference. Offshore Technology Conference, 2012. http://dx.doi.org/10.4043/23563-ms.

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Holt, M. W. « Operational oceanography for the North West European Shelf seas : NOOS 2002–2006 ». Dans 2006 IEEE US/EU Baltic International Symposium on Integrated Ocean Observation Syst. for Managing Global & Regional Ecosys.Marine Resch. IEEE, 2006. http://dx.doi.org/10.1109/baltic.2006.7266165.

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Pradipta, Rezy, et Patricia H. Doherty. « Measuring and Monitoring Systematic Movements of Equatorial Plasma Bubbles Using Regional GPS TEC Data Maps ». Dans 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017). Institute of Navigation, 2017. http://dx.doi.org/10.33012/2017.15346.

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Jensen, L., et J. Teasdale. « Integrated Gravity and Magnetic Workflows in Regional Basin Analysis, a South and Equatorial Atlantic Exploration Perspective ». Dans EGM 2010 International Workshop. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.165.d_op_05.

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« Morphodynamics and spatial distribution of regional slope failures in the Offshore Amazon Basin, Brazilian Equatorial Margin ». Dans International Congress of the Brazilian Geophysical Society&Expogef. Brazilian Geophysical Society, 2021. http://dx.doi.org/10.22564/17cisbgf2021.229.

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Aristizábal Ceballos, Jaime Hernán, et Hugo Alberto García García. « ARPEL/EPGEO : Regional Geotechnics Project — Good Practices in Pipeline Integrity Management to Face Geohazards ». Dans ASME 2017 International Pipeline Geotechnical Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/ipg2017-2538.

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Due to the importance for the Oil and Gas Industry to have a technical document that consolidates the knowledge on management of geohazards for Latin America, the Geotechnics Project Team (EPGEO under its acronym in Spanish) of the Regional Association of Oil, Gas and Biofuels Sector Companies in Latin America and the Caribbean (ARPEL) developed the “Guidelines for Monitoring and Inspection of Pipeline Integrity Management to Face Geohazards” between 2014 and 2016. These guidelines contain the experience of the different operators in the region, given the highly-complex geological-geotechnical pipeline routes (due to the mountain range of the Andes in South America or the Central System in Central America), as well as the high technical requirement derived from the dynamics of the triggering agents in equatorial and tropical areas. In this respect, this document presents the main results of such consolidation and its dissemination, some relevant aspects to be taken into account in interdisciplinary works with reference to third parties, as well as the new guidelines that the EPGEO has proposed to develop that complement the management of geohazards in a Pipeline Transportation System (PTS).
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Cheng, Allen, Frank Langer, Filiberto Rodriguez, John C. Criscione, George T. Daughters, D. Craig Miller et Neil B. Ingels. « Transmural LV Systolic Wall Thickening Gradients and Models of Heart Wall Mechanics ». Dans ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61238.

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We implanted arrays of radiopaque markers to measure lateral equatorial wall transmural strains and global and regional LV geometry in 7 sheep. Without intervening procedures, one and eight weeks after surgery, 4-D datasets from stereo radiographic studies were processed to yield transmural strains from each heart. In accordance with previous theoretical predictions and experimental results, we hypothesized that systolic radial strain (i.e., wall thickening) would exhibit a transmural gradient, increasing from subepicardium to subendocardium, and, as previous work suggested that this was a fundamental mechanism, this gradient would be observed at both the one- and eight-week studies. The one-week studies yielded the expected gradient. This gradient, however, was not present in the eight-week studies, although LV shape and hemodynamics were virtually identical to their one-week values. We discuss the implications of these findings to mechanistic theories of heart wall mechanics.
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Shkorba, Svetlana, Svetlana Shkorba, Elena Dmitrieva, Elena Dmitrieva, Irina Mashkina, Irina Mashkina, Vladimir Ponomarev et Vladimir Ponomarev. « CLIMATIC ANOMALIES IN FAR EASTERN MARGINAL SEAS, BAIKAL LAKE BASIN AND THEIR LINKAGES ». Dans Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b939727b3b4.55522289.

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Winter climatic anomalies of various time scales in the Japan, Okhotsk seas and Baikal Lake Basin are revealed and compared with anomalies in the Pacific, Indian and Arctic oceans. Time series of ice extent in the Japan and Okhotsk seas, ice thickness and seasonal duration of the ice cover in the Baykal Lake, as well as Hadley SST, surface heat fluxes, wind velocity, atmospheric pressure fields (SLP) and different climatic indices are analyzed. The decadal climate anomalies in the Japan and Okhotsk seas in mid winter, as compared to the Northeast Pacific and South Siberia regions, could have a reversed phase. Alternating cold/warm decadal anomalies in different longitude zones of the North Asian Pacific are accompanied by alternating meridional wind and SLP anomalies at temperate latitudes. Alternating zones of inversed anomalies in temperate latitudes of the Asian Pacific are related to teleconnections with anomalies in both Arctic and Indo-Pacific oceans. Negative SSTA in eastern/central tropical-equatorial Pacific and positive SSTA in El Nino area accompanies rise of northern wind and ice extent in the Okhotsk/Japan Seas in mid-winter. The best predictors of the high cold anomaly in February in the western subarctic Pacific and marginal seas are reduction of the SST and net heat flux from the atmosphere to the ocean in north-eastern and central North Pacific during warm period of a previous year. At the multidecadal time scale the warming/cooling in the Northeast Pacific accompany winter warming/cooling in the Baykal Lake area during all period of observation. At interdecadal time scales the significant link of winter climate oscillations in South Siberia (Baikal Lake Basin) is found with SSTA oscillations in the equatorial region of the Indian Ocean and certain areas of the Pacific Ocean. The linkages of anomalies in the Baikal Lake Basin, Okhotsk, Japan Seas with regional anomalies in some key areas of the Pacific and Indian Oceans, related to the atmospheric centers of action are more stable than that with climatic indices. After climate regime shift in late 70s warm decadal anomaly in both Lake Baykal Basin and Indian Ocean in boreal winter accompany high positive anomaly of the Arctic Oscillation. Scenarios of extreme anomalies in the Baikal Lake Basin and Subarctic Pacific marginal area are also presented.
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Shkorba, Svetlana, Svetlana Shkorba, Elena Dmitrieva, Elena Dmitrieva, Irina Mashkina, Irina Mashkina, Vladimir Ponomarev et Vladimir Ponomarev. « CLIMATIC ANOMALIES IN FAR EASTERN MARGINAL SEAS, BAIKAL LAKE BASIN AND THEIR LINKAGES ». Dans Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316b9d9e4.

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Winter climatic anomalies of various time scales in the Japan, Okhotsk seas and Baikal Lake Basin are revealed and compared with anomalies in the Pacific, Indian and Arctic oceans. Time series of ice extent in the Japan and Okhotsk seas, ice thickness and seasonal duration of the ice cover in the Baykal Lake, as well as Hadley SST, surface heat fluxes, wind velocity, atmospheric pressure fields (SLP) and different climatic indices are analyzed. The decadal climate anomalies in the Japan and Okhotsk seas in mid winter, as compared to the Northeast Pacific and South Siberia regions, could have a reversed phase. Alternating cold/warm decadal anomalies in different longitude zones of the North Asian Pacific are accompanied by alternating meridional wind and SLP anomalies at temperate latitudes. Alternating zones of inversed anomalies in temperate latitudes of the Asian Pacific are related to teleconnections with anomalies in both Arctic and Indo-Pacific oceans. Negative SSTA in eastern/central tropical-equatorial Pacific and positive SSTA in El Nino area accompanies rise of northern wind and ice extent in the Okhotsk/Japan Seas in mid-winter. The best predictors of the high cold anomaly in February in the western subarctic Pacific and marginal seas are reduction of the SST and net heat flux from the atmosphere to the ocean in north-eastern and central North Pacific during warm period of a previous year. At the multidecadal time scale the warming/cooling in the Northeast Pacific accompany winter warming/cooling in the Baykal Lake area during all period of observation. At interdecadal time scales the significant link of winter climate oscillations in South Siberia (Baikal Lake Basin) is found with SSTA oscillations in the equatorial region of the Indian Ocean and certain areas of the Pacific Ocean. The linkages of anomalies in the Baikal Lake Basin, Okhotsk, Japan Seas with regional anomalies in some key areas of the Pacific and Indian Oceans, related to the atmospheric centers of action are more stable than that with climatic indices. After climate regime shift in late 70s warm decadal anomaly in both Lake Baykal Basin and Indian Ocean in boreal winter accompany high positive anomaly of the Arctic Oscillation. Scenarios of extreme anomalies in the Baikal Lake Basin and Subarctic Pacific marginal area are also presented.
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