Arctic Ice (update)

Latest plots - accurate to 1st July 2012 - of sea ice extent. The 1st july slope is unchanged from previous years.

Extent is below whole record average but similar to 2007

A few plots of FFTs from JAXA data for Arctic Sea Ice extent data - only 10 years of data so FFT info is unreliable for periods of around a couple of years or more.
Data is daily (with a few infills).
I see no 28 day lunar events:

There are periods of:
61 days
73 days
124 days
186 days
1 year
652 day (possibly)
2 weeks (possibly)