Analysis and robustness of Arctic sea level reconstructions

Tuesday, 16 December 2014
Peter Limkilde Svendsen1, Ole Baltazar Andersen1 and Allan A Nielsen2, (1)Technical University of Denmark - Space, Kongens Lyngby, Denmark, (2)DTU Compute, Kgs. Lyngby, Denmark
Arctic sea level reconstructions presents a substantially different set of challenges from global sea level reconstructions. In particular, tide gauge records are scarce and often short, and in many cases located in rivers, necessitating a number of modifications to existing reconstruction techniques. Altimetry records are available, though of more limited coverage than for global sea level reconstructions.

We attempt to establish the preconditions for a stable reconstruction of Arctic sea level from 1950 to today. This includes quality criteria for the tide gauge records --- such as allowable trends --- and regularization details of the fit.