Quote:
Originally Posted by julianh72
Oh dear, oh dear, oh dear!!!!
Let me take you through your various issues with my posts in nice small steps!
See attached - I've highlighted it for you.
SOMETHING happened to create a "step-change" in the Amberley data in about 1980, as plotted here. I don't claim the expertise to know what that "something" was, but I D0 know that plotting a linear trend-line through a data-set which contains an unexplained step-change is just "bad science".
Already explained here:
http://www.iceinspace.com.au/forum/s...8&postcount=24
By the way - the fact that the winter figure shows a less obvious downward trend than the summer is simply explained:
The measurements are area under sea ice, not the total quantity (volume / mass) of ice. In winter, the Arctic Ocean still freezes over, although the southern-most latitude of freezing is tending to retreat, which is where the reduction of area under ice is observed. However, the winter ice is also thinning significantly, and less and less winter ice survives each summer to form the base of the next year's ice pack.
http://www.nasa.gov/topics/earth/fea...20090707r.html
Puh-lease!!!!
Now you are really resorting to the "cherry-picking" and selective quoting that is so often a trait of the climate-change deniers!
I was responding to an earlier query by tigerdes (as is very clear from my response!) - the UNITS on the graph that I attached to my previous post are "millions of square kilometres". The winter average has dropped from 15.7 million square kilometres to 15.1 million square kilometres, and the reason why this is still significant is because the total mass / volume of winter ice has dropped by a much bigger amount, because while the winter AREA hasn't dropped by much, the winter thickness has dropped significantly. (As explained above.)
If I was marking a junior school science assignment, you just scored a D-! |
Hi Julian,
I think you are talking nonsense again. A thousand or so daily readings taken between 1980 and 1983 show the minimum temperature going down and then going back up, and the readings aren't outside typical average range, and I doubt they are outside 2 sigma or 3 sigma confidence intervals. Perhaps the "Something" that happened here was that it actually got colder. The notion that people didn't have good thermometers in accredited weather stations prior to 1980 is a nonsense.
Lets see, you tell someone that winter ice has dropped by millions of square kilometers. I point out that the case by your own figures is only 0.6million.
You actually agree that such is the case, but instead of saying that you were plainly and unambiguously incorrect, you
a. Accuse me of cherry picking - which is a irrelevant and a nonsense, and
b. Accuse me of being a climate change denier - which has zilch to do with your poor arithmetic, and
c. Then claim to actually be correct, and
d Disparagingly conclude that you would give me a D- if you were marking a junior assignment.
My conclusion is that you are extremely sensitive to criticism when some one points out that you got the simple arithmetic wrong, that most any child can do in Year 2 or Year 3.
Regards,
Renato