@article{HippeKoberZeilingeretal.2009,
  author    = {Hippe, Kristina and Kober, Florian and Zeilinger, Gerald and Ivy-Ochs, Susan and Kubik, Peter W. and Wieler, Rainer},
  title     = {Short and long-term denudation rates at the Altiplano margin, La Paz region, Bolivia},
  issn      = {0016-7037},
  doi       = {10.1016/j.gca.2009.05.006},
  year      = {2009},
  language  = {en}
}
@article{KoberIvyOchsZeilingeretal.2009,
  author    = {Kober, Florian and Ivy-Ochs, Susan and Zeilinger, Gerald and Schlunegger, Fritz and Kubik, Peter W. and Baur, Heinrich and Wieler, Rainer},
  title     = {Complex multiple cosmogenic nuclide concentration and histories in the arid Rio Lluta catchment, northern Chile},
  issn      = {0197-9337},
  doi       = {10.1002/Esp.1748},
  year      = {2009},
  abstract  = {Terrestrial cosmogenic nuclide (TCN) concentrations measured in river sediments can be used to estimate catchment-wide denudation rates. By investigating multiple TCN the steadiness of sediment generation, transport and depositional processes can be tested. Measurements of Be-10, Ne-21 and Al-26 from the hyper- to semi-arid Rio Lluta catchment, northern Chile, yield average single denudation rates ranging from 12 to 75 m Myr(-1) throughout the catchment. Paired nuclide analysis reveals complex exposure histories for most of the samples and thus the single nuclide estimates do not exclusively represent catchment-wide denudation rates. The lower range of single nuclide denudation rates (12-17 m Myr(-1)), established with the noble gas Ne-21, is in accordance with palaeodenudation rates derived from Ne-21/Be-10 and Al-26/Be-10 ratio analysis. Since this denudation rate range is measured throughout the system, it is suggested that a headwater signal is transported downstream but modulated by a complex admixture of sediment that has been stored and buried at proximal hillslope or terrace deposits, which are released during high discharge events. That is best evidenced by the stable nuclide Ne-21, which preserves the nuclide concentration even during storage intervals. The catchment-wide single Ne-21 denudation rates and the palaeodenuation rates contrast with previous TCN-derived erosion rates from bedrock exposures at hillslope interfluves by being at least one order of magnitude higher, especially in the lower river course. These results support earlier studies that identified a coupling of erosional processes in the Western Cordillera contrasting with decoupled processes in the Western Escarpment and in the Coastal Cordillera.},
  language  = {en}
}
@article{HippeKoberZeilingeretal.2012,
  author    = {Hippe, Kristina and Kober, Florian and Zeilinger, Gerold and Ivy-Ochs, Susan and Maden, Colin and Wacker, Lukas and Kubik, Peter W. and Wieler, Rainer},
  title     = {Quantifying denudation rates and sediment storage on the eastern Altiplano, Bolivia, using cosmogenic Be-10, Al-26, and in situ C-14},
  series = {Geomorphology : an international journal on pure and applied geomorphology},
  volume    = {179},
  journal   = {Geomorphology : an international journal on pure and applied geomorphology},
  number    = {22},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0169-555X},
  doi       = {10.1016/j.geomorph.2012.07.031},
  pages     = {58 -- 70},
  year      = {2012},
  abstract  = {Denudation processes and sediment transfer are investigated in a high-elevation, low-relief environment (eastern Altiplano, Bolivia) using Be-10, Al-26, and in situ C-14 analysis in fluvial sediments. Concentrations of the long-lived nuclides Be-10 and Al-26 yield consistently low catchment-wide denudation rates of similar to 3-29 mm ky(-1) (integrating over 21-194 ky), which reflect the low geomorphic gradients and the discontinuity of fluvial transport along the eastern Altiplano margin. No significant correlation is recorded between denudation rates of individual catchments and morphological basin parameters (slope, area, elevation). This is attributed to the overall little variability in morphology. The agreement between the denudation rates and published modern sediment discharge data suggests steady landscape evolution of the eastern Altiplano from the latest Pleistocene until today. While Be-10 and Al-26 provide long-term estimates on sediment production, in situ cosmogenic C-14 is used to trace short-term sediment storage. In situ C-14 concentrations are comparatively low indicating that C-14 decayed during alluvial storage over at least the past similar to 11-20 ky. We assume storage at shallow depth (2 m) and consider the influence of soil-mantled hillslopes on the in situ C-14 concentration. Our results illustrate the importance of sediment storage even over short distances and demonstrate the potential of in situ C-14 to study sediment routing and transfer times within drainage systems. However, this study also demonstrates that the long-lived Be-10 and Al-26 nuclides can provide adequate estimates on long-term denudation rates even if sediment transport is not fast but interrupted by several thousands of years of storage.},
  language  = {en}
}