Proceedings of the 5th plenary meeting of the COST E21 Action, Thessaloniki (Greece), 27-29 November 2003 - Foreword
Evidence for global runoff increase related to climate warming
Ongoing global climatic change initiated by the anthropogenic release of carbon dioxide is a matter of intense debate. We focus both on the impact of these climatic changes on the global hydrological cycle and on the amplitude of the increase of global and continental runoff over the last century, in relation to measured temperature increases. In t...
Total mercury concentrations in an industrialized catchment, the Thur River basin (north-eastern France): geochemical ba...
River bottom sediments and soils were collected from the industrialized Thur River basin (north-eastern France) to assess mercury contamination. The regional geochemical background level of total mercury was evaluated to calculate mercury contamination factors (Fc) in soils and river bottom sediments. Our estimate of the mean background mercury lev...
Silicate rock weathering and atmospheric/soil CO2 uptake in the Amazon basin estimated from river water geochemistry: se...
Using the data of the CAMREX project (1982–1984) on the water geochemistry of the Amazon river and its main tributaries, it was possible to assess the silicate rock weathering processes and the associated consumption of atmospheric/soil CO2, taking into account seasonal and spatial variations. This study confirms the important role of the Andes in ...
TransCom 3 CO2 inversion intercomparison: 1. Annual mean control results and sensitivity to transport and prior flux inf...
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Spatial and temporal variations of atmospheric CO2 concentrations contain information about surface sources and sinks, which can be quantitatively interpreted through tracer transport inversion. Previous CO2 inversion calculations obtained differing results due to different data, methods and transport models used. To isolate the sources of uncertai...
Stromflow component determination using hydrological, isotopic and chemical approaches in the small forested strengbach ...
The hydrological behaviour Of the small (0.8 km2)granitic Strengbach catchment (Vosges mountains, Eastern France)was investigated during an intensive summer rainfall event (30mm) by hydrological, isotopic and chemical measurements of streamflow components. [puissance]18 O, Si, DOC were selected to asses the different contributing sources using mass...
Riverine-driven interhemispheric transport of carbon
Contreversy surrounds the role of the ocean in interhemispheric transport of carbon. On one hand, observations in the atmosphere and in the ocean both seem to imply that the preindustrial ocean transported up to 1 Pg Cyr-¹ from the Northern to the Southern Hemisphere. On the other hand, three dimensional (3-D) ocean models suggest that global inter...
REE fractionation during granite weathering and removal by waters and suspended loads: Sr and Nd isotopic evidence
Very few studies deal with REE (rare earth element) mobility within the system soil–soil solution–streamwater. In this article, we try to characterize the fractionation and the migration of the REE in a granite-derived soil system located in a small catchment of the Vosges mountains. ICP-MS and TIMS measurements were performed on both solid samples...
The use of hopanes to track in situ variations in petroleum composition in surface sediments
Alterations in the composition of a Light Arabian crude oil has been studied in situ during 12 months in an artificially contaminated site. After 12 months of experimentation, C17/Pr and C18/Ph ratios could not be used, because the isoprenoïds were no longer stable. In contrast, a high degree of stability of biomarkers, especially hopanes, was obse...
In situ bioturbation and hydrocarbon fate in an experimental contaminated Mediterranean coastal ecosystem
An in situ experiment was conducted in the French Mediterranean littoral (Gulf of Fos) from July 1992 to January 1993 using cores containing defaunated or natural sediment. Particulate tracers (luminophores) and hydrocarbons (Arabian Light crude oil) were deposited at the sediment surface. After 1, 4 and 6 months, luminophore and hydrocarbon (satur...
