http://hdl.handle.net/2122/162 Search the Channel search http://www.earth-prints.org/simple-search http://hdl.handle.net/2122/4361 Title: Glacio and hydro-isostasy in the Mediterranean Sea: Clark’s zones and role of remote ice sheets <br/> <br/>Authors: Stocchi, P.; Istituto di Fisica, Università degli Studi di Urbino «Carlo Bo», Urbino, Italy; Spada, G.; Istituto di Fisica, Università degli Studi di Urbino «Carlo Bo», Urbino, Italy <br/> <br/>Abstract: Solving the sea-level equation for a spherically symmetric Earth we study the relative sea-level curves in the Mediterranean Sea in terms of Clark’s zones and we explore their sensitivity to the time-history of Late-Pleistocene ice aggregates. Since the Mediterranean is an intermediate field region with respect to the former ice sheets, glacio- and hydro-isostasy both contribute to sea-level variations throughout the Holocene. In the bulk of the basin, subsidence of the sea floor results in a monotonous sea-level rise, whereas along continental margins water loading produces the effect of «continental levering», which locally originates marked highstands followed by a sea-level fall. To describe such peculiar pattern of relative sea-level in this and other mid-latitude closed basins we introduce a new Clark’s zone (namely, Clark’s zone VII). Using a suite of publicly available ice sheet chronologies, we identify for the first time a distinct sensitivity of predictions to the Antarctic ice sheet. In particular, we show that the history of mid to Late Holocene sea-level variations along the coasts of SE Tunisia may mainly reflect the melting of Antarctica, by a consequence of a mutual cancellation of the effects from the Northern Hemisphere ice-sheets at this specific site. Ice models incorporating a delayed melting of Antarctica may account for the observations across the Mediterranean, but fail to reproduce the SE Tunisia highstand. http://hdl.handle.net/2122/2036 Title: From bottom landers to observatory networks <br/> <br/>Authors: Person, R.; IFREMER, Centre de Brest, Plouzané, France; Aoustin, Y.; IFREMER, Centre de Brest, Plouzané, France; Blandin, J.; IFREMER, Centre de Brest, Plouzané, France; Marvaldi, J.; IFREMER, Centre de Brest, Plouzané, France; Rolin, J. F.; IFREMER, Centre de Brest, Plouzané, France <br/> <br/>Abstract: For a long time, deep-sea investigation relied on autonomous bottom landers. Landers can vary in size from 200 kg weight to more than 2 t for the heaviest scientific landers and are used during exploration cruises on medium periods, from one week to some months. Today, new requirements appear. Scientists want to understand in detail the phenomena outlined during exploration cruises, to elaborate a model for future forecasting. For this, it is necessary to deploy instrumentation at a precise location often for a long period. A new mode of ocean science investigation using longterm seafloor observatories to obtain four dimensional data sets has appeared. Although this concept has been proposed for many years, the high level of investment required limits the number of projects implemented. Only multidisciplinary programs, supported by a strong social requirement were funded. Some observatories have been deployed.