http://earthobservatory.nasa.gov/Feature...
You had it right to begin with. The data points show observed variability. They are not oscillations. Oscillations have mathematical definitions with numerical solutions of amplitude, frequency, and period.
Given the available data in the graph all you can say is that it looks like several things influence ice extent. There is not enough data in the graph for a mathematical solution. It's possible that there is information from other sources that are synchronous with the graph and that have physical explanations, but I'm not familiar enough with the Antarctic climate data to know if that is the case.
If you know that you have a perfect sine wave then you can define it based on partial information. In natural systems identifying such patterns requires substantial data - and even if you can find analytical solutions, it does not mean they are real. Also, although cyclical series are oscillatory - oscillatory series are not necessarily cyclical.
C - prove antarctic ice volume is decreasing. You can't because antarctic ice volume is INCREASING along with sea ice extent. Maybe you need to board a ship with a few AGW cultists to go down there and take some pictures.
http://wattsupwiththat.com/2014/02/05/cr...
Kano - I highly suspect it could be from cycles in undersea currents fueled by the sun.
What have you asked maybe 50 questions about Antarctica. Why don't you learn anything Ice extent means almost nothing It expands in the winter and melts in the summer it has ABSOLUTELY NOTHING TO DO WITH ICE VOLUME WHICH IS DECREASING YEARLY
James...Antarctica is losing ice volume at an increasing rate every year The ice extent is increasing yearly but it melts almost completely yearly it is thin ice as opposed to the western portion is land ice and this is melting from below due to the increase in ocean temperature This is a scientific fact
As I have explained before, Antarctic sea ice is the only negative feedback that anyone has been able to prove exists in global climate, though ENSO looks like a negative feedback. Negative feedbacks cause oscillations, like the thermostat in a person's house.
See this graph http://sunshinehours.files.wordpress.com/2014/05/antarctic-sea-ice-extent-for-day-128-from-1979-infilled.png?w=1024&h=511
From 1979 to 1982 there were big changes in ice extent, then it quieted down somewhat, and from 2006 to now it has returned to big oscillations.
Satellite records only go back to 1979 so we cant know what happened before, whether this is a normal pattern or not.
what do you think?
