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Technical Note: Watershed Strategy for Oceanic Mesoscale Eddy Spli...

By: L. Sun; Q. Y. Li

Description: Key Laboratory of Atmospheric Composition and Optical Radiation, CAS, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China. To identify oceanic mononuclear mesoscale eddies, a threshold-free splitting method was developed based on the watershed. Because oceanic eddies are similar to plateaus and basins in the map of the sea level anomaly (SLA) data, the natural divisions of the basins are the watersh...

Chaigneau, A., Gizolme, A., and Grados, C.: Mesoscale eddies off Peru in altimeter records: identification algorithms and eddy spatio-temporal patterns, Progr. Oceanogr., 79, 106–119, 2008.; Chaigneau, A., Le Texier, M., Eldin, G., Grados, C., and Pizarro, O.: Vertical structure of mesoscale eddies in the eastern South Pacific Ocean: a composite analysis from altimetry and Argo profiling floats, J. Geophys. Res.-Oceans, 116, C11025,

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Argo Data Assimilation Into Hycom with an Enoi Method in the Atlan...

By: C. A. S. Tanajura; A. N. Santana; J. Xie; D. Mignac; L. N. Lima

Description: Graduate Program in Geophysics, Physics Institute and Geosciences Institute, Federal University of Bahia (UFBA), Salvador, Brazil. An ocean data assimilation system to assimilate Argo temperature (T) and salinity (S) profiles into HYCOM was constructed, implemented and evaluated for the first time in the Atlantic Ocean (78° S to 50° N and 98° W to 20° E). The system is based on the Ensemble Optimal Interpolation (EnOI) algorithm proposed ...

Bell, M. J., Martin, M. J., and Nichols, N. K.: Assimilation of data into an ocean model with systematic errors near the equator, Q. J. Roy. Meteorol. Soc., 130, 873–893, 2004.; Belyaev, K. P., Tanajura, C. A. S., and Tuchkova, N. P.: Comparison of methods for Argo drifters data assimilation into a hydrodynamical model of the ocean, Oceanology, 52, 593–603, 2012.; Bleck, R.: An oceanic general circulation model framed in hybrid isopycnic–Cartesian coordinates, Ocean Mode...

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Corrigendum to Nemo on the Shelf: Assessment of the Iberia–biscay–...

By: The Mercator Research and Development Team; J. Chanut; B. Levier; G. Reffray; P. De Mey; P. Marsaleix; M. Drévillon; E. A. Fanjul; N. Ayoub; C. Maraldi; F. Lyard; M. G. Sotillo; S. Cailleau

Description: LEGOS/CNRS/Université de Toulouse, UMR5566, 14 avenue Edouard Belin, 31400 Toulouse, France. No abstract available.

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Southern Ocean Overturning Across Streamlines in an Eddying Simula...

By: S. R. Rintoul; G. Madec; M. H. England; J.-m. Molines; J. Le Sommer; A. M. Treguier

Description: Laboratoire de Physique de Oceans, CNRS-IFREMER-UBO, Plouzané, France. An eddying global model is used to study the characteristics of the Antarctic Circumpolar Current (ACC) in a streamline-following framework. Previous model-based estimates of the meridional circulation were calculated using zonal averages: this method leads to a counter-intuitive poleward circulation of the less dense waters, and underestimates the eddy effects. We show that on the c...

Barnier, B., Madec, G., Penduff, T., Molines, J.M., Treguier, A.M., Le Sommer, J., Beckmann, A., Biastoch, A., Böning, C., Dengg, J., Derval, C., Durand, E., Gulev, S., Remy, E., Talandier, C., Theetten, S., Maltrud, M., McClean, J., and De Cuevas, B.: Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution, Ocean Dynam., doi:10.1007/s10236-006-0082-1, 2006. \bibitem[]brodeau2007 Brodeau L.: Contribution à ...

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Extraction of Spatial-temporal Rules from Mesoscale Eddies in the ...

By: Z. He; X. Fan; C. Zhou; D. Wang; F. Su; Y. Du; H. Mao

Description: State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China. In this paper, a rough set theory is introduced to represent spatial-temporal relationships and extract the corresponding rules from typical mesoscale-eddy states in the South China Sea (SCS). Three decision attributes are adopted in this study, which make the approach ...

Bai, H., Ge, Y., Wang, J., and Liao, Y.: Using rough set theory to identify villages affected by birth defects: the example of Heshun, Shanxi, China, Int. J. Geogr. Inf. Sci., 24(4), 559–576, 2010.; Cheng, X., Qi, Y., and Wang, W.: Seasonal and Interannual Variabilities of Mesoscale Eddies in South China Sea, J. Trop. Oceanogr., 24(4), 51–59, 2005.; Fayyad, U. M. and Irani, K. B.: On the handling of continuous-valued attributes in decision tree generation, Mach. Learn., ...

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A New Method for Forming Approximately Neutral Surfaces : Volume 5...

By: T. J. McDougall; D. R. Jackett; A. Klocker

Description: Centre for Australian Climate and Weather Research, Castray Esplanade, TAS 7000, Australia. We introduce a simple algorithm to improve existing density surfaces to ensure that the resulting surfaces are as close to neutral as possible. This means the slopes at any point on the surfaces are close to neutral tangent planes – the directions along which layered stirring and mixing occurs – minimizing the fictitious diapycnal diffusivity. Inverse techniques a...

de~Szoeke, R A., Springer, S R., and Oxilia, D M.: Orthobaric Density: A Thermodynamic Variable for Ocean Circulation Studies, J. Phys. Oceanogr., 30, 2830–2852, 2000.; Eden, C. and Willebrand, J.: Neutral density revisited, Deep Sea Res. Pt. II, 46, 33–54, 1999.; Jackett, D R. and McDougall, T J.: A Neutral Density Variable for the World's Oceans, J. Phys. Oceanogr., 27, 237–263, 1997.; Levitus, S.: Climatological Atlas of the World Ocean, NOAA Prof. Paper No. 13, Govt....

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Sensitivity of Phytoplankton Distributions to Vertical Mixing Alon...

By: H. J. Van Der Woerd; H. A. Dijkstra; L. Hahn-woernle

Description: Institute for Marine and Atmospheric Research Utrecht (IMAU), Dept. of Physics and Astronomy, Utrecht University, P.O. Box 80.005, 3508 TA Utrecht, the Netherlands. Using in situ data of upper ocean vertical mixing along a transect in the North Atlantic and a one-dimensional phytoplankton growth model, we study the sensitivity of the surface phytoplankton concentration to vertical mixing distributions. The study is divided into two parts. In the first par...

Antoine, D., Morel, A., Gordon, H., Banzon, V., and Evans, R.: Bridging ocean color observations of the 1980s and 2000s in search of long-term trends, J. Geophys. Res., 110, C06009, doi:10.1029/2004JC002620, 2005.; Beckmann, A. and Hense, I.: Beneath the surface: Characteristics of oceanic ecosystems under weak mixing conditions – A theoretical investigation, Prog. Oceanogr., 75, 771–796,

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Comparing the Steric Height in the Northern Atlantic with Satellit...

By: M. Wenzel; D. V. Sidorenko; J. Schroeter; D. L. Aleynik; V. O. Ivchenko; S. D. Danilov

Description: Alfred Wegener Institute for Polar and Marine Research, Germany. Anomalies of dynamic height derived from an analysis of Argo profiling buoys data are analysed to assess the relative roles of contributions from temperature and salinity over the North Atlantic for the period of 1999–2004. They are compared with dynamic topography anomalies based on TOPEX/Poseidon and Jason altimetry. It is shown that the halosteric contribution to the anomalies of dynam...

Antonov, J. I., Levitus, S., and Boyer, T. P.: Steric sea level variations during 1957–1994: Importance of salinity, J. Geophys. Res., 107(C12), 8013, doi:10.1029/2001JC000964, 2002.; Bretherton, F. P., Davis, R. E., and Fandry, C. B.: A technique for objective analysis and design of oceanographic experiments applied to MODE-73, Deep-Sea Res., 23, 559–582, 1976.; Gandin, L. S.: Objective analysis of meteorological fields, Leningrad, Gidrometeoizdat, 287 pp. (in Russian),...

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Phytoplankton Blooms on the Western Shelf of Tasmania: Evidence of...

By: J. Kämpf

Description: School of the Environment, Flinders University, Adelaide, Australia. Satellite-derived chlorophyll a data using the standard NASA-OC3 (ocean colour) algorithm are strongly biased by coloured dissolved organic matter and suspended sediment of river discharges, which is a particular problem for the western Tasmanian shelf. This work reconstructs phytoplankton blooms in the study region using a quadratic regression between OC3 data and chlorophyll f...

Behrenfeld, M. J., Westberry, T. K., Boss, E. S., O'Malley, R. T., Siegel, D. A., Wiggert, J. D., Franz, B. A., McClain, C. R., Feldman, G. C., Doney, S. C., Moore, J. K., Dall'Olmo, G., Milligan, A. J., Lima, I., and Mahowald, N.: Satellite-detected fluorescence reveals global physiology of ocean phytoplankton, Biogeosciences, 6, 779–794, doi:10.5194/bg-6-779-2009, 2009.; Chen, C., Zhu, J., Beardsley, R. C., and Franks...

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Sensors for Observing Ecosystem Status : Volume 6, Issue 1 (23/04/...

By: N. Greenwood; D. B. Sivyer; J. D. Metcalfe; R. M. Forster; D. J. Pearce; S. Kröger; E. R. Parker

Description: Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft, Suffolk, NR33 0HT, UK. This paper aims to review the availability and application of sensors for observing marine ecosystem status. It gives a broad overview of important ecosystem variables to be investigated, such as biogeochemical cycles, primary and secondary production, species distribution, animal movements, habitats and pollutants. Some relevant legislati...

Gregg, W. W. and Casey, N. W.: Global and regional evaluation of the SeaWiFS chlorophyll data set, Remote Sens. Environ., 93, 463–479, 2004.; Arnold, G. P. and Dewar, H.: Electronic tags in marine fisheries research: a 30 year perspective., in: Electronic Tagging and Tracking In Marine Fisheries, edited by: Nielsen, J. R. S. J. L., Kluwer Academic Press, Dordrecht, The Netherlands, 7–64, 2001.; Aylott, J. W., Richardson, D. J., and Russell, D. A.: Optical biosensing of n...

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Shifting Momentum Balance and Frictional Adjustment Observed Over ...

By: J. L. Pelegrí; A. Aretxabaleta; M. Espino; M. Grifoll

Description: Maritime Engineering Laboratory, Technical University of Catalonia, Barcelona, Spain. We investigate the rapidly changing equilibrium between the momentum sources and sinks during the passage of a two-peak storm over the Catalan inner-shelf (NW Mediterranean Sea). Velocity measurements at 24 m water depth are taken as representative of the inner shelf, and the cross-shelf variability is explored with additional measurements at 50 m water ...

Booij, N., Ris, R. C., and Holthuijsen, L. H.: A third-generation wave model for coastal regions: 1. Model description and validation, J. Geophys. Res., 104, 7649, doi:10.1029/98JC02622, 1999.; Csanady, G. T.: Circulation in the coastal ocean, Adv. Geophys., 23, 101–183, 1981.; Dzwonkowski, B., Park, K., Lee, J., Webb, B. M., and Valle-Levinson, A.: Spatial variability of flow over a river-influenced inner shelf in coastal ...

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Fate of River Tiber Discharge Investigated Through Numerical Simul...

By: R. Santoleri; A. Orasi; C. Pizzi; F. Bignami; R. Inghilesi; L. Ottolenghi

Description: Institute for Environmental Protection and Research (ISPRA), Italy. The aim of this study was to determine the dispersion of passive pollutants associated with the Tiber discharge into the Tyrrhenian Sea using numerical marine dispersion models and satellite data. Numerical results obtained in the simulation of realistic discharge episodes were compared with the corresponding evolution of the spatial distributions of MODIS diffuse light attenuation coef...

Artale, V., Astraldi, M., Buffoni, G., and Gasparini, P.: Seasonal variabilit of gyre-scale circulation in the northern Tyrrhenian Sea, J. Geophys. Res., 99, 127–137, 1994.; Bignami, F., Sciarra, R., Carniel, S., and Santoleri, R.: Variability of Adriatic Sea coastal turbid waters from SeaWiFS imagery, J. Geophys. Res., 112, C03S10, 2007.; Astraldi, M. and Gasparini, G. P.: The seasonal Characteristics of the Circulation in the North Mediterranean Basin and Their Relatio...

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Lidar Vs. Geodas Land Elevation Data in Hurricane Induced Inundati...

By: L. J. Pietrafesa; H. Liu; M. Xia; M. Peng; T. Yan; S. Bao

Description: Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, North Carolina, Raleigh, NC, 27695, USA. LIDAR (Light Detection and Ranging) and GEODAS (GEOphysical DAta System) are respectively taken as the land elevation data for a 3-D storm surge and inundation model to investigate the subsequent inundation differences. Hilton Head, South Carolina, and Croatan-Albemarle-Pamlico Estuary System (CAPES), North Carolina, ar...

Falconer, R. A. and Owens, P. H.: Numerical simulation of flooding and drying in a depth-averaged tidal flow model, Proceedings Institution Civil Engineers, 83, 161–180, 1987.; Flather, R. A. and Heaps, N. S.: Tidal computations for Morecambe Bay. Geophys, J. R. Astronomical Soc., 42, 489–517, 1975.; Holland, G. J.: An analytic model of the wind and pressure profiles in hurricanes, Monthly Weather Rev., 108, 1212–1218, 1980.; Hubbert, G. D. and McInnes, K. L.: A storm su...

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Tidal Variability of the Motion in the Strait of Otranto : Volume ...

By: M. Gačić; V. Kovačević; L. Ursella

Description: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), B.go Grotta Gigante 42/c, 34010 Sgonico (TS), Italy. Various current data, collected in the Strait of Otranto during the period 1994–2007, have been analysed with the aim of describing the characteristics of the tidal motions and their contribution to the total flow variance. The principal tidal constituents in the area were the semi-diurnal (M2) and the diurnal (K1), with the latter o...

Buljan, M. and Zore-Armanda, M.: Oceanographical properties of the Adriatic Sea, Oceanogr. Mar. Biol. Ann. Rev., 14, 11–98, 1976.; Beckenbach, E. and Terrill, E.: Internal tides over abrupt topography in the Southern California Bight: observations of diurnal waves poleward of the critical latitude, J. Geophys. Res., 113, C02001, doi:10.1029/2006JC003905, 2008.; Book, J. W., Martin, P. J., Janeković, I., Kuzmić, M., and W...

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The Gyre-scale Circulation of the North Atlantic and Sea Level at ...

By: G. Wöppelmann; N. Pouvreau; P. L. Woodworth

Description: Proudman Oceanographic Laboratory, Joseph Proudman Building, 6 Brownlow Street, Liverpool L3 5DA, UK. The relationship between the gyre-scale circulation of the North Atlantic, represented by air pressure near to the centre of the sub-tropical gyre, and sea level measured at the eastern boundary of the ocean has been investigated using records commencing in the middle of the 18th century. These time series are twice as long as those employed in a...

Allan, R. and Ansell, T.: A new globally complete monthly historical mean sea level pressure data set (HadSLP2): 1850–2004, J. Clim., 19(22), 5816–5842, 2006.; Bindoff, N., Willebrand, J., Artale, V., Cazenave, A., Gregory, J., Gulev, S., Hanawa, K., Le Quéré, C., Levitus, S., Nojiri, Y., Shum, C. K., Talley, L., and Unnikrishnan, A.: Observations: oceanic climate change and sea level, in: Climate Change 2007: The Physical Science Basis. Contribution of Working Group 1 t...

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Technical Note: a Fully Automated Purge and Trap Gc-ms System for ...

By: S. C. Hackenberg; L. J. Carpenter; S. J. Andrews

Description: Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, The University of York, York, YO105DD, UK. The oceans are a key source of a number of atmospherically important volatile gases. The accurate and robust determination of trace gases in seawater is a significant analytical challenge, requiring reproducible and ideally automated sample handling, a high efficiency of seawater–air transfer, removal of water vapour from the sample...

Asare, N. K., Turley, C. M., Nightingale, P. D., and Nimmo, M.: Microbially-mediated methyl iodide production in water samples from an estuarine system, J. Environ., 1, 75–83, 2012.; Beale, R., Liss, P. S., Dixon, J. L., and Nightingale, P. D.: Quantification of oxygenated volatile organic compounds in seawater by membrane inlet-proton transfer reaction/mass spectrometry, Anal. Chim. Acta, 706, 128–134, doi:10.1016/j.ac...

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Three Decades of Research on the Greater Agulhas Current : Volume ...

By: J. R. E. Lutjeharms

Description: Department of Oceanography, University of Cape Town, 7700 Rondebosch, South Africa. The greater Agulhas Current has been shown to be a key link in the global thermohaline circulation and an increased understanding of this current system is therefore of more than just local interest. Knowledge on the Agulhas Current system has in fact increased enormously over the past 30 years. This review covers some aspects of what has been learnt on the northern and ...

Anderson, F. P., Gründlingh, M. L., and Stavropoulos, C. C.: Kinematics of the southern Natal coastal circulation: some historic measurements 1962–63, S. Afr. J. Sci., 84, 857–860, 1988.; Arhan, M., Mercier, H., and Lutjeharms, J. R. E.: The disparate evolution of three Agulhas rings in the South Atlantic Ocean, J. Geophys. Res., 104, 20 987–21 005, 1999.; Bang, N. D.: Major eddies and frontal structures in the Agulhas Current retroflexion (sic) area in March, 1969, in: ...

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Influence of Ross Sea Bottom Water Changes on the Warming and Fres...

By: S. R. Rintoul; K. I. Ohshima; S. Aoki; K. Shimada

Description: Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan. The WOCE Hydrographic Program (WHP) and repeated hydrographic data were used to document overall property changes of the Antarctic Bottom Water (AABW) in the Australian-Antarctic Basin between the 1990s and 2000s. Strong cooling and freshening is observed on isopycnals for layers denser than Γn = 28.30. Changes in average salinity and potential te...

Aoki, S., Rintoul, S. R., Ushio, S., Watanabe, S., and Bindoff, N. L.: Freshening of the Adélie Land Bottom Water near 140{\degree} E, Geophys. Res. Lett., 32, L23601, doi:10.1029/2005GL024246, 2005.; Bindoff, N. L. and Mcdougall, T. J.: Diagnosing climate change and ocean ventilation using hydrographic data, J. Phys. Oceanogr., 24, 1037–1152, 1994.; Boyer, T. P., Antonov, J. I., Baranova, O. K., Garcia, H. E., Johnson, ...

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Multifractal Analysis of Oceanic Chlorophyll Maps Remotely Sensed ...

By: S. Thiria; M. Jouini; S. Verrier; M. Crepon; L. De Montera

Description: Laboratoire d'Océanographie et du Climat, Expérimentation et Approches Numériques, UMR 7159, Paris, France. Phytoplankton patchiness has been investigated with multifractal analysis techniques. We analyzed oceanic chlorophyll maps, measured by the SeaWiFS orbiting sensor, which are considered to be good proxies for phytoplankton. Multifractal properties are observed, from the sub-mesoscale up to the mesoscale, and are found to be consistent w...

Aristegui, J., Alvarez-Salgado, X. A., Barton, E. D., Figueiras, F. G., Hernandez-Leon, S., Roy, C., and Santos, A. M. P.: Oceanography and Fisheries of the Canary Current/Iberian Region of the Eastern North Atlantic, The Sea, Vol. 14, Chap. 23, edited by: Robinson, A. R. and Brink, K. H., John Wiley and Sons, New York, 877–931, 2004.; Corrsin, S.: On the spectrum of isotropic temperature fluctuations in an isotropic turbulence, J. Appl. Phys., 22, 469–475, 1951.; Currie...

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Eddy Characteristics in the Northern South China Sea as Inferred f...

By: B. Jin; R. Zhang; J. X. Li

Description: Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China. Cyclones and anticyclones from large scale to submesoscale on the Northern South China Sea (NSCS) have been statistically characterized based on the satellite-tracked Lagrangian drifter data using a geometric eddy identification method. There are totally 1972 eddies identified, 4/5 of which are anticyclonic eddies. If the submesoscale eddies are ...

Aken, H. M. v.: Surface currents in the Bay of Biscay as observed with drifters between 1995 and 1999, Deep-Sea Res. Pt. I, 49, 1071–1086, 2002.; Boebel, O., Lutjeharms, J., Schmid, C., Zenk, W., Rossby, T., and Barron, C.: The cape cauldron: a regime of turbulent inter-ocean exchange, Deep-Sea Res. Pt. II, 50, 57–86, 2003.; Chaigneau, A. and Pizarro, O.: Eddy characteistics in the Eastern South Pacific, J. Geophys. Res., 110, C06005,

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