Guest post by Steven Goddard
Last week, UN Secretary General Ban Ki-Moon warned
that “polar ice caps were melting far faster than expected just two years ago
This was based on a number of widely publicized scientific studies released this year claiming that both the Arctic and Antarctic are melting faster than expected.
A team of UK researchers claims to have new evidence that global warming is melting the ice in Antarctica faster than had previously been thought.
Icecaps around the North and South Poles are melting faster than expected, raising sea levels as a result of climate change, a major scientific survey has shown.
Tues., April 28, 2009
OSLO – The ice sheets of Greenland and Antarctica have awakened and are melting faster than expected, a leading expert told peers ahead of a conference of ministers from nations with Arctic territory.
Dorthe Dahl-Jensen, an expert with the Center for Ice and Climate at the University of Copenhagen, told the conference in the Arctic town of Tromsoe that the need for a wake-up call was genuine for the polar and glacial regions.
He apparently didn’t read this paper
from last Autumn’s AGU Meeting
Ice loss in Greenland has had some climatologists speculating that global warming might have brought on a scary new regime of wildly heightened ice loss and an ever-faster rise in sea level. But glaciologists reported at the American Geophysical Union meeting that Greenland ice’s Armageddon has come to an end.
One has to wonder if some scientists are lacking access to the Internet, as the amount of polar sea ice on the planet is above the 30 year mean.
Yesterday, NSIDC announced
that “Arctic sea ice extent at the end of April 2009 was within the expected range of natural variability
.” and “The decline rate for the month of April was the third slowest on record
The NSIDC graph below shows that April ice extent has actually increased by more than the size of Texas over past last two years. Clearly The UN Secretary General is mistaken when he claims “”polar ice caps were melting far faster than expected just two years ago.”
I took this graph a step further and compared 2009 vs. past years. Current April extent is the greatest in the last 8 years. It is greater than it was 20 years ago.
If you look at the last 20 years, there is no statistically significant trend in the data.
Arctic ice extent is essentially normal.
It is important to remember that ice area between mid-April and mid-August is what affects the earth’s climate, because that is when the sun is up highest in the sky. When the ice reaches it’s minimum in September, the sun is so low above the horizon that the presence or absence of ice has little impact on the earth’s SW radiation balance. A more complete explanation here
Also, the claim of Polar Bear endangerment is based largely on the idea that the ice is supposedly breaking up earlier than it used to in the spring. The “third slowest melt on record” would hardly support that popular claim.
I continue to be astonished at the amount of misinformation being propagated by some scientists and governmental officials. The correct information is readily available to anyone who has access to Google and five minutes of time. What is the real agenda?