Yes it is, but what is the cause? Natural cycles, or something else? The earth has been both much colder in the past, and much warmer. The causal link is the issue, not that the climate changes.Don Jorgensen wrote: The permafrost is melting now. This isn't the first time but it is the first in modern times and the rate is staggering. .
see below:
Experts question theory on global warming
(Himalayan glaciers not shrinking)
New Delhi - 11 Feb 07 - Some glacial experts have questioned the alarmists theory on global warming leading to shrinkage of Himalayan glaciers. VK Raina, a leading glaciologist and former ADG of GSI is one among them.
He feels that the research on Indian glaciers is negligible. Nothing but the remote sensing data forms the basis of these alarmists observations and not on-the-spot research.
Raina told the Hindustan Times that out of 9,575 glaciers in India, research has been conducted only on about 50. Nearly 200 years data has shown that nothing abnormal has occurred in any of these glaciers.
The issue of glacial retreat is being sensationalised by a few individuals, the septuagenarian Raina claimed.
However, Dr RK Pachouri, Chairman, Inter-Governmental Panel of Climatic Change said it’s recently released fourth assessment report has recorded increased glacier retreat since the 1980s.
But Raina, who has been associated with the research and data collection in over 25 glaciers in India and abroad, debunked the theory that Gangotri glacier is retreating alarmingly.
Maintaining that the glaciers are undergoing natural changes witnessed periodically, he said recent studies in the Gangotri and Zanskar areas (Drung- Drung, Kagriz glaciers) have not shown any evidence of major retreat.
"Claims of global warming causing glacial melt in the Himalayas are based on wrong assumptions," said Raina, a trained mountaineer and skiing expert.
Nobody knows what is happening. Whatever is being flaunted about the under surface activity of the glaciers is merely presumptions, he claimed.
His views were echoed by Dr RK Ganjoo, Director, Regional Centre for Field Operations and Research on Himalayan Glaciology, who is supervising study of glaciers in Ladakh region including one in the Siachen area. He also maintained that nothing abnormal has been found in any of the Himalyan glaciers studied so far by him.
Another leading geologist MN Koul of Jammu University, who is actively engaged in studying glacier dynamics in J&K and Himachal holds similar views. Referring to his research on Kol glacier ( Paddar, J&K) and Naradu (HP), he said both the glaciers have not changed much in the past two decades.
See full article by Anil Anand at:
http://www.hindustantimes.com/news/181_1925164,0008.htm
Glaciers Growing in France and Switzerland
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28 Jun 07 – This news comes from a recent article in the Journal of Geophysical Research entitled "Very high-elevation Mont Blanc glaciated areas not affected by the 20th century climate change."
The research was conducted by six scientists from leading agencies and departments in France and Switzerland that deal with hydrology and glaciology. The research was funded by Observatoire des Sciences de l’Univers de Grenoble (OSUG), the European Programs ALPCLIM and CARBOSOL, and by the city of Chamonix Mont-Blanc.
Vincent et al. collected a variety of datasets that could help them understand how the high-elevation glaciers of Mont Blanc were impacted by variations and trends in climate. Among other findings, they found that the mass balance of the glaciers is strongly controlled by precipitation, not temperature.
Vincent et al. state "The most striking features of these figures are the small thickness changes observed over the 20th century. For both areas, thickness variations do not exceed ±15 m. The average changes are +2.6 m at Dôme du Goûter (please note that this glacier is growing) and -0.3 m (-12 inches) at Mont Blanc.
"Considering the uncertainty interval, i.e., ±5 m, it can be concluded that no significant thickness change is detectable over most of these areas". "All these results suggest that the SMBDôme du Goûter and Mont Blanc did not experience any significant changes over the 20th century."
"Geodetic measurements carried out in 1905 and 2005 on the highest ice fields of the Mont Blanc range indicate small thickness changes and show that these very high-elevation glaciated areas have not been significantly affected by climate change over the last 100 years."
"In any case, this study reveals that the very high-elevation ice fields in the Mont Blanc area have not been affected by the climate warming.
"The 20th century climate warming affected the atmospheric temperature in the Alps by +1EC. However this change did not significantly affect the ice deformation rate in the high-altitude ice fields since the ice temperature remains far below the melting point and therefore keeping the glacier frozen to its bed."
[ that temperature increase of 1°C occurred from 1800 to 1930, and
has been declining since then.]
[From weather stations in the Alps, and in the Nordic
countries, we find the temperature decline since 1930
is also 1°C. ]
(See http://www.iceagenow.com/Nisqually_Glacier.htm)
See entire article by Noel Sheppard
http://newsbusters.org/node/13798
.
Manipulation of public perceptions
By Dr. Tim Ball
While the media raised alarms over Arctic ice melt, they did not report
that Antarctic winter sea ice extent was the greatest on record.
_____________________________
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4 Dec 07 - Most people know very little about the natural world and how it works. This lack of knowledge is easily exploited and coupled with fear makes it an even more powerful manipulative tool.
Arctic ice conditions are a perfect example. In 2005 we heard that an area of Arctic ice the size Texas melted more than in 2004. Horrors! Catastrophe! The polar bears will be dead very soon. But what is the reality? Well this melt is well within natural variability and a very small portion of the total annual melt. Every single summer approximately 10 million square kilometers of ice melts in about 3 months. This is an area equal to the United States.
Texas is approximately 681,089 square kilometers or 6.8% of the total land area. Suddenly it is not so dramatic. The same scare technique was used in the 1970s. We were told, "The ice cover in the Northern Hemisphere increased by 12 percent in 1971 - an increase equal to the combined are of England, Italy, and France. This added ice has remained."
While the media raised alarms over Arctic ice melt, they did not report that Antarctic winter sea ice extent was the greatest on record.
Of course, all this ice is in the water, so when it melts sea level doesn’t change. So the ice is not disappearing. Annual melt and refreeze is large, and current situations are well within normal numbers.
The pattern this year illustrates the cycle.
See ice-extent maps: http://www.ilovemycarbondioxide.com/Arctic.html