Swain, M.; Lloyd, J.; Traub, W.; Walker, C.; Stark, A.; Lawson, P.; Storey, J.; Coude du Foresto, V.; Fossat, E.; Ireland, M.; Burrows, A.; Vakili, F. (2003). The Antarctic Planet Interferometer. Bulletin of the american astronomical society, 35, 1262.
Abstract: American Astronomical Society Meeting 203, #38.15;
Programme: 908
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Trampert, J.; Snieder, R. (1996). Model Estimations Biased by Truncated Expansions: Possible Artifacts in Seismic Tomography. Science, 271(5253), 1257–1260.
Abstract: In most linear imaging problems, where the model to be sought is expanded in a set of basis functions, it is common practice to truncate the set at a certain (arbitrary) level. The solution then depends on the chosen parameterization, and neglected basis functions may leak into the solution to produce artifacts in the retrieved model. An unbiased estimate of the coefficients of the true model may be obtained in the chosen finite basis set ; here, a method to suppress leakage is illustrated on an example of global seismic tomography.
Keywords: seismology ; tomography ; errors ; mathematical models ; methods ; inverse problem ; elastic waves ; Rayleigh waves ; algorithms
Programme: 133
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Venkataraman A., Rivera L. & Kanamori H. (2002). Radiated energy from the october 16, 1999 Hector Mine earthquake: regional and teleseismic estimates. Bulletin of the seismological society of america, 92(4), 1256–1265.
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Delille D., Marty G., Cansemi Soullard M. & Frankignoulle M. (1997). Influence of subantarctic Macrocystis bed metabolism in diel changes of marine bacterioplankton and CO2 fluxes. J. Plankton Res., 19(9), 1251–1264.
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Marchaudon, A., J.-C. Cerisier, M. W. Dunlop, F. Pitout, J.-M. Bosqued, A. N. Fazakerley. (2009). Shape, size, velocity and field-aligned currents of dayside plasma injections: a multi-altitude study. ANNALES GEOPHYSICAE, 27, 1251–1266.
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Toucanne S., S. Zaragosi , J.F. Bourillet , M. Cremer , F. Eynaud, B. Van Vliet-Lanoë , C. Fontanier J.L. Turon , E. Cortijo and P.L. Gibbard. (2009). Timing of massive 'Fleuve Manche' discharges over the last 350 kyr: insights into the European Ice Sheet oscillations and the European drainage network from MIS 10 to 2. Quat Sci Rev, 28, 1238–1256.
Abstract: Continuous high-resolution mass accumulation rates (MAR) and X-ray fluorescence (XRF) measurements
from marine sediment records in the Bay of Biscay (NE Atlantic) have allowed the determination of thetiming and the amplitude of the ‘Fleuve Manche’ (Channel River) discharges during glacial stages MIS 10,MIS 8, MIS 6 and MIS 4–2. These results have yielded detailed insight into the Middle and Late Pleistocene glaciations in Europe and the drainage network of the western and central European rivers over the last 350 kyr. This study provides clear evidence that the ‘Fleuve Manche’ connected the southern North Sea basin with the Bay of Biscay during each glacial period and reveals that ‘Fleuve Manche’ activity during the glaciations MIS 10 and MIS 8 was significantly less than during MIS 6 and MIS 2. We correlate the significant ‘Fleuve Manche’ activity, detected during MIS 6 and MIS 2, with the extensive Saalian (Drenthe Substage) and the Weichselian glaciations, respectively, confirming that the major Elsterian glaciation precedes the glacial MIS 10. In detail, massive ‘Fleuve Manche’ discharges occurred at ca 155 ka (mid-MIS 6) and during Termination I, while no significant discharges are found during Termination II. It is assumed that a substantial retreat of the European ice sheet at ca 155 kyr, followed by the formation of ice-free conditions between the British Isles and Scandinavia until Termination II, allowed meltwater to flow northwards through the North Sea basin during the second part of the MIS 6. We assume that this glacial pattern corresponds to the Warthe Substage glacial maximum, therefore indicating that the data presented here equates to the Drenthe and the Warthe glacial advances at ca 175–160 ka and ca 150–140 ka, respectively. Finally, the correlation of our records with ODP site 980 reveals that massive ‘Fleuve Manche’ discharges, related to partial or complete melting of the European ice masses, were synchronous with strong decreases in both the rate of deep-water formation and the strength of the Atlantic thermohaline circulation. ‘Fleuve Manche’ discharges over the last 350 kyr probably participated, with other meltwater sources, in the collapse of the thermohaline circulation by freshening the northern Atlantic surface water.
Programme: 316
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Jaeger A., Blanchard P., Richard P., Cherel Y. (2009). Using carbon and nitrogen isotopic values of body feathers to infer inter- and intra-individual variations of seabird feeding ecology during moult. Mar. Biol., 156, 1233–1240.
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Jouventin P., Mouret V. & Bonadonna F. (2007). Wilson's storm petrels Oceanites oceanicus recognise the olfactory signature of their mate. Ethology, 113, 1228–1232.
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Simon, N.S.C.; Neumann, E.-R.; Bonadiman, C.; Coltorti, M.; Delpech, G.; Gregoire, M.; Widom, E. (2008). Ultra-refractory Domains in the Oceanic Mantle Lithosphere Sampled as Mantle Xenoliths at Ocean Islands. Journal of petrology, 49(6), 1223–1251.
Abstract: Many peridotite xenoliths sampled at ocean islands appear to have strongly refractory major element and modal compositions. To better constrain the chemistry, abundance and origin of these ultra-refractory rocks we compiled a large number of data for xenoliths from nine groups of ocean islands. The xenoliths were filtered petrographically for signs of melt infiltration and modal metasomatism, and the samples affected by these processes were excluded. The xenolith suites from most ocean islands are dominated by ultra-refractory harzburgites. Exceptions are the Hawaii and Tahiti peridotites, which are more fertile and contain primary clinopyroxene, and the Cape Verde suite, which contains both ultra-refractory and more fertile xenoliths. Ultra-refractory harzburgites are characterized by the absence of primary clinopyroxene, low whole-rock Al2O3, CaO, FeO/MgO and heavy rare earth element (HREE) concentrations, low Al2O3 in orthopyroxene (generally < 3 wt %), high Cr-number in spinel (0{middle dot}3-0{middle dot}8) and high forsterite contents in olivine (averages > 91{middle dot}5). They are therefore on average significantly more refractory than peridotites dredged and drilled from mid-ocean ridges and fracture zones. Moreover, their compositions resemble those of oceanic forearc peridotites. The formation of ultra-refractory ocean island harzburgites requires potential temperatures above those normally observed at modern mid-ocean ridges, and/or fluid fluxed conditions. Some ultra-refractory ocean island harzburgites give high Os model ages (up to 3300 Ma), showing that their formation significantly pre-dates the oceanic crust in the area. A genetic relationship with the host plume is considered unlikely based on textural observations, equilibration temperatures and pressures, inferred physical properties, and the long-term depleted Os and Sr isotope compositions of some of the harzburgites. Although we do not exclude the possibility that some ultra-refractory ocean island harzburgites have formed at mid-ocean ridges, we favor a model in which they formed in a process spatially and temporally unrelated to the formation of the oceanic plate and the host plume. As a result of their whole-rock compositions, ultra-refractory harzburgites have a very high solidus temperature at a given pressure, low densities and very high viscosities, and will tend to accumulate at the top of the convecting mantle. They may be preserved as fragments in the convecting mantle over long periods of time and be preferentially incorporated into newly formed lithosphere.
Programme: 444
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Preunkert S., Wagenbach D. & Legrand M. (2002). Improvement and characterization of an automatic aerosol sampler for remote (glacier) sites. Atmospheric environment, 36(7), 1221–1232.
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