I have downloaded
the HADISST ice data and computed sea ice extent for both the arctic and antarctic (based on 15 % concentration to be consistent with NSIDC data from the satellite era).
Not exact matches
One is the
HADISST sea
ice and sea surface temperature
data set from the Hadley Centre (which also covers the southern hemisphere), the other is from Kinnard et al. (2008).
Incorporating AARI
data should push down
HadISST (at least most years between 1933 and 1952), but I don't see such thing (this is the previous version of
HadISST arctic sea
ice data: http://tamino.files.wordpress.com/2010/10/nhem140.jpg).