Hölder exponents of weekly sea level at the station SMKUF1 in January 2008. (a). h_smkf1_2008() in the 1st week on January 2008. (b). h_smkf1_2008() in the 2nd week in Jan. 2008. (c). h_smkf1_2008() in the 3rd week in Jan. 2008. (d). h_smkf1_2008() in the 4th week in Jan. 2008.