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Temporal variability of Critical Zone processes using high-resolution environmental archives
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Edited by Pierre Sabatier, Mathieu Dellinger, Fabien Arnaud
Critical zone processes and their driving mechanisms, including climate forcing (temperature, precipitation) and human impacts (pollution, agriculture, erosion), operate on a variety of temporal and spatial scales. Instrumental measurements, however, are only available for a recent time period and thus cannot describe the longer-term Critical Zone trajectories. Proxy data from various biological and geological archives have demonstrated that climate variability and environmental changes can be reconstructed on seasonal to millennial time scales. The quantitative exploitation of proxy data in terms of critical zone processes and related forcings can be improved by a better understanding of the signal transfer into the different geoarchives (e.g., lake sediments, tree rings, speleothems). Ideally, this can be achieved by integrating modern observation/monitoring and recent well-dated proxy records. This session aims to address specific problems of research at the interface of instrumental and proxy time scales, for example, different temporal resolutions of data. We want to encourage discussions among researchers from different disciplines trying to elaborate a long-term integrative understanding of Critical Zone trajectories under the influence of different drivers. We especially welcome contributions on monitoring of proxy data formation to develop retroactive observation of Critical Zone processes: investigating the impacts and interactions of landscape formationand Critical Zone processes, combining high-resolution archives with other data sources such as meteorological data, remote-sensing data, and historical information aiming at a comprehensive understanding of landscape evolution and Critical Zone processes, as well as use of landscape-evolution models for hypothesis testing.
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