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| Werner, M.; Haese, B.; Xu, X.; Zhang, X.; Butzin, M.; Lohmann, G.. |
| In this study we present the first results of a new isotope-enabled general circulation model set-up. The model consists of the fully coupled ECHAM5/MPI-OM atmosphere-ocean model, enhanced by the JSBACH interactive land surface scheme and an explicit hydrological discharge scheme to close the global water budget. Stable water isotopes (H2O)-O-18 and HDO have been incorporated into all relevant model components. Results of two equilibrium simulations under pre-industrial and Last Glacial Maximum conditions are analysed and compared to observational data and paleoclimate records for evaluating the model's performance in simulating spatial and temporal variations in the isotopic composition of the Earth's water cycle. For the pre-industrial climate, many... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00383/49427/49847.pdf |
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| Xu, X.; Werner, M.; Butzin, M.; Lohmann, G.. |
| The stable water isotopes (H2O)-O-18 and HDO are incorporated as passive tracers into the oceanic general circulation model MPI-OM, and a control simulation under present-day climate conditions is analyzed in detail. Both delta O-18 and delta D distributions at the ocean surface and deep ocean are generally consistent with available observations on the large scale. The modelled delta D-delta O-18 relations in surface waters slightly deviates from the slope of the global meteoric water line in most basins, and a much steeper slope is detected in Arctic Oceans. The simulated deuterium excess of ocean surface waters shows small variations between 80 degrees S and 55 degrees N, and a strong decrease north of 55 degrees N. The model is also able to capture the... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00383/49455/49910.pdf |
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| Kao, S. -j.; Hilton, R. G.; Selvaraj, K.; Dai, M.; Zehetner, F.; Huang, J. -c.; Hsu, S.-c.; Sparkes, R.; Liu, J. T.; Lee, T. -y.; Yang, J. -y. T.; Galy, A.; Xu, X.; Hovius, N.. |
| Geological sequestration of atmospheric carbon dioxide (CO2) can be achieved by the erosion of organic carbon (OC) from the terrestrial biosphere and its burial in long-lived marine sediments. Rivers on mountain islands of Oceania in the western Pacific have very high rates of OC export to the ocean, yet its preservation offshore remains poorly constrained. Here we use the OC content (Corg, %), radiocarbon (Δ 14Corg) and stable isotope (δ13Corg) composition of sediments offshore Taiwan to assess the fate of terrestrial OC, using surface, sub-surface and Holocene sediments. We account for rock-derived OC to assess the preservation of OC eroded from the terrestrial biosphere and the associated CO2 sink during flood discharges (hyperpycnal river plumes) and... |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00263/37447/35706.pdf |
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