|
|
Gustavo J. Goni, Janet Sprintall, Francis Bringas, Lijing Cheng, Mauro Cirano, Shenfu Dong, Ricardo Domingues, Marlos Goes, Hosmay Lopez, Rosemary Morrow, Ulises Rivero, Thomas Rossby, Robert E. Todd, Joaquin Trinanes, Nathalie Zilberman, Molly Baringer, Tim Boyer, Rebecca Cowley, Catia M. Domingues, Katherine Hutchinson, Martin Kramp, Mauricio M. Mata, Franco Reseghetti, Charles Sun, Udaya Bhaskar TVS, Denis Volkov. (2019). More Than 50 Years of Successful Continuous Temperature Section Measurements by the Global Expendable Bathythermograph Network, Its Integrability, Societal Benefits, and Future (Vol. 6).
Abstract: The first eXpendable BathyThermographs (XBTs) were deployed in the 1960s in the North Atlantic Ocean. In 1967 XBTs were deployed in operational mode to provide a continuous record of temperature profile data along repeated transects, now known as the Global XBT Network. The current network is designed to monitor ocean circulation and boundary current variability, basin-wide and trans-basin ocean heat transport, and global and regional heat content. The ability of the XBT Network to systematically map the upper ocean thermal field in multiple basins with repeated trans-basin sections at eddy-resolving scales remains unmatched today and cannot be reproduced at present by any other observing platform. Some repeated XBT transects have now been continuously occupied for more than 30 years, providing an unprecedented long-term climate record of temperature and geostrophic velocity profiles that are used to understand variability in ocean heat content, sea level change, and meridional ocean heat transport. Here, we present key scientific advances in understanding the changing ocean and climate system supported by XBT observations. Improvement in XBT data quality and its impact on computations, particularly of ocean heat content, are presented. Technology development for probes, launchers, and transmission techniques are also discussed. Finally, we offer new perspectives for the future of the Global XBT Network.
Keywords: Boundary current Expendable bathythermograph (XBT) Meridional heat transport surface current Upper ocean thermal structure
Programme: 694
|
|
|
|
Rosemary Morrow, Aurore Brut, Alexis Chaigneau. (2003). Seasonal and interannual variations of the upper ocean energetics between Tasmania and Antarctica (Vol. 50).
Abstract: Nine years of Topex/Poseidon and ERS satellite altimetry and XBT data from the SURVOSTRAL program were used to analyze the seasonal and interannual variations of the eddy energetics in terms of its spatial distribution and relation with the upper ocean heat content. Eddy kinetic energy is calculated in two frequency bands one associated with transient and the other with low-frequency variability. The two eddy components have distinct geographical distribution. At the SURVOSTRAL line, the transient eddy energy is twice the low-frequency energy, with maximum transient energy occurring during the austral summer period and maximum low-frequency energy in winter. The site is one of growing eddy energy. Eddy momentum flux is northward over the SURVOSTRAL line, and the summertime eddy heat flux is poleward across the Subantarctic and Subtropical Fronts, and equatorward either side of the fronts. Eddy fluxes are strongly influenced by their position relative to the bathymetry and the mean current.
Keywords: Altimetry Eddy heat flux Eddy kinetic energy Southern Ocean XBT data
Programme: 694
|
|
|
|
. (2012). Vibrations of Mertz Glacier ice tongue, East Antarctica
. Journal of Glaciology, 58(210), 665–676.
Abstract: At the time of its calving in February 2010, Mertz Glacier, East Antarctica, was characterized by a 145 km long, 35 km wide floating tongue. In this paper, we use GPS data from the Collaborative Research into Antarctic Calving and Iceberg Evolution (CRAC-ICE) 2007/08 and 2009/10 field seasons to investigate the dynamics of Mertz Glacier. Two months of data were collected at the end of the 2007/08 field season from two kinematic GPS stations situated on each side of the main rift of the glacier tongue and from rock stations located around the ice tongue during 2008/09. Using Precise Point Positioning with integer ambiguity fixing, we observe that the two GPS stations recorded vibrations of the ice tongue with several dominant periods. We compare these results with a simple elastic model of the ice tongue and find that the natural vibration frequencies are similar to those observed. This information provides a better understanding of their possible effects on rift propagation and hence on the glacier calving processes.
Programme: 688;1050
|
|
|
|
. (2014). Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters (Vol. 119). Bachelor's thesis, , .
Keywords: Polar Front, Kerguelen, Southern Ocean, 4207 Arctic and Antarctic oceanography, 4528 Fronts and jets,
Programme: 688,1061
|
|
|
|
. (2016). Atmospheric drying as the main driver of dramatic glacier wastage in the southern Indian Ocean (Vol. 6). Bachelor's thesis, , .
|
|
|
|
. (2021). Recent Climate Variability around the Kerguelen Islands (Southern Ocean) Seen through Weather Regimes (Vol. 60). Bachelor's thesis, , .
|
|
|
|
. (2021). Bachelor's thesis, , .
|
|
|
|
. (2022). Classic or hybrid? The performance of next generation ecological models to study the response of Southern Ocean species to changing environmental conditions (Vol. 28). Bachelor's thesis, , .
Keywords: Bayesian inference data-poor systems integrated approaches Kerguelen Islands sea urchin species distribution modelling
Programme: 688,1044
|
|
|
|
Shum Woodworth A., Egbert F., King K., Le Provost L.I., Molines P.R., Schlax S. & Tierney V. (1997). Accuracy asessment of recent ocean tide models. J. Geophys. Res., 102(C11), 25173–25194.
|
|
|
|
Provost C L.E. (1996).
|
|
