TY  - JOUR
A1  - Doetterl, Sebastian
A1  - Berhe, Asmeret Asefaw
A1  - Nadeu, Elisabet
A1  - Wang, Zhengang
A1  - Sommer, Michael
A1  - Fiener, Peter
T1  - Erosion, deposition and soil carbon: A review of process-level controls, experimental tools and models to address C cycling in dynamic landscapes
JF  - Earth science reviews : the international geological journal bridging the gap between research articles and textbooks
N2  - The role of soil erosion in terrestrial carbon (C) sequestration and release remains one of the most important uncertainties in our attempts to determine the potential of soils to mediate climate change. Despite its widely recognized importance for terrestrial C sequestration, to date, no Earth System Model (ESM) implements soil erosion effects on carbon cycling in sufficient detail. So far, available studies have mostly investigated the magnitude of erosional C transport and in-situ measurements of vertical C fluxes on the catchment or regional scale. Recognizing the need to adequately represent C erosion processes and controls in ESMs, we provide a comprehensive cross-disciplinary review on lateral C redistribution in the landscape and discuss the implications for bio-geochemical cycling of carbon. We present current knowledge on the role of erosional C distribution in controlling the stabilization and release of C in soils, taking into consideration the important geomorphic, ecological, hydrologic, pedologic and micro-climatic processes and controls that affect soil organic carbon (SOC) stock, fluxes, and persistence in dynamic landscapes. Further, we provide an overview on latest experimental and modelling approaches that are being used to investigate the role of erosion in the carbon cycle. Finally, to advance our understanding of the role of soil redistribution in biogeochemical cycles of essential elements, we discuss the most promising topics for future research in this field. (C) 2015 Elsevier B.V. All rights reserved.
KW  - Soil erosion
KW  - Soil deposition
KW  - Carbon redistribution
KW  - Terrestrial C sink
Y1  - 2016
U6  - https://doi.org/10.1016/j.earscirev.2015.12.005
SN  - 0012-8252
SN  - 1872-6828
VL  - 154
SP  - 102
EP  - 122
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kaiser, Michael
A1  - Berhe, Asmeret Asefaw
A1  - Sommer, Michael
A1  - Kleber, Markus
T1  - Application of ultrasound to disperse soil aggregates of high mechanical stability
JF  - Journal of plant nutrition and soil science = Zeitschrift für Pflanzenernährung und Bodenkunde
N2  - Questions remain about the exact ultrasonic energy level that is required to effectively disperse soil aggregates and to what extent this is accompanied by physical damage to individual soil particles. We found maximum aggregate dispersion at energy levels of 1500 J?cm3 and no evidence for the disintegration of particles < 20 mu m even at that energy level. Our findings suggest that sonication at energies much greater than those applied conventionally can disperse aggregates of high mechanical stability.
KW  - soil aggregates
KW  - ultrasonication
KW  - dispersion maxima
KW  - water-extractable elements
Y1  - 2012
U6  - https://doi.org/10.1002/jpln.201200077
SN  - 1436-8730
VL  - 175
IS  - 4
SP  - 521
EP  - 526
PB  - Wiley-VCH
CY  - Weinheim
ER  -