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Element Redistribution along Hydraulic and Redox Gradients of Low-Centered Polygons, Lena Delta, Northern Siberia

S. Fiedler*,a, D. Wagnerb, L. Kutzbachb and E.-M. Pfeifferc

a Univ. of Hohenheim, Inst. of Soil Science and Land Evaluation, D-70593 Stuttgart, Germany
b Alfred Wegener Institute, Foundation for Polar and Marine Research, Telegrafenberg A43, 14473 Potsdam, Germany
c Institute of Soil Science, Allende-Platz 2, 20146 Hamburg, Germany



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  		Fig. 1. Cross-section of a typical low-center polygon (Lena Delta, Northern Siberia).

 


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  		Fig. 2. The investigation site on the island Samoylov. (a) Map showing the location of the Lena Delta, and (b) location of the study area on the island Samoylov.

 


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  		Fig. 3. Permafrost and water table of the low-center Polygon 1 (measurement period = 6 June to 1 Sept. 1999).

 


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  		Fig. 4. Relationship between topography and redox regime. The oxidation-reduction values distribution in form of box plots (see legend) (a) Polygon 1 and (c) Polygon 2. Cross section through studied low-center polygons with morphological units and installation depths (points filled in black) of the lower electrodes (directly above the permafrost table), (b) Polygon 1 (day of installation 28 June 1999), (d) Polygon 2 (day of installation 30 July 2000).

 


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  		Fig. 5. Model of different kinds of element redistribution within low-center polygons.

 




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