Article

Estuaries and Coasts

, Volume 35, Issue 2, pp 486-500

Salt Marsh Accretion and Storm Tide Variation: an Example from a Barrier Island in the North Sea

  • Mark SchuerchAffiliated with“The Future Ocean” Excellence Cluster, Institute of Geography, University of Kiel Email author 
  • , J. RapagliaAffiliated with“The Future Ocean” Excellence Cluster, Institute of Geography, University of Kiel
  • , V. LiebetrauAffiliated with“The Future Ocean” Excellence Cluster, Leibniz Institute of Marine Science, IFM-GEOMAR
  • , A. VafeidisAffiliated with“The Future Ocean” Excellence Cluster, Institute of Geography, University of Kiel
  • , K. ReiseAffiliated withWadden Sea Station Sylt, Alfred Wegener Institute for Polar and Marine Research

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

We reconstruct past accretion rates of a salt marsh on the island of Sylt, Germany, using measurements of the radioisotopes 210Pb and 137Cs, as well as historical aerial photographs. Results from three cores indicate accretion rates varying between 1 and 16 mm year−1. Comparisons with tide gauge data show that high accretion rates during the 1980s and 1990s coincide with periods of increased storm activity. We identify a critical inundation height of 18 cm below which the strength of a storm seems to positively influence salt marsh accretion rates and above which the frequency of storms becomes the major factor. In addition to sea level rise, we conclude that in low marsh zones subject to higher inundation levels, mean storm strength is the major factor affecting marsh accretion, whereas in high marsh zones with lower inundation levels, it is storm frequency that impacts marsh accretion.

Keywords

Salt marsh Accretion rate Geochronology Storm activity Barrier Island Sylt