Himalaya glaciers melting much faster then thought Himalaya glaciers melting much faster then thought
Himalaya glaciers melting much faste... 
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16 y
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Warming appears to be having bigger impact on ice at higher elevations
Glaciers high in the Himalayas are dwindling faster than anyone thought, putting nearly a billion people living in South Asia in peril of losing their water supply.
Throughout India, China, and Nepal, some 15,000 glaciers speckle the Tibetan Plateau, some of the highest land in the world. There, perched in thin, frigid air up to 7,200 meters (23,622 feet) above sea level, the ice might seem secluded from the effects of global warming.
But just the opposite is proving true, according to new research published last week in the journal Geophysical Research Letters.
Lonnie Thompson of Ohio State University and a team of researchers traveled to central Himalayas in 2006 to study the Naimona'nyi glacier, expecting to find some melting. Mountain glaciers have been receding all over the world since the 1990s and there was no reason this one, which provides water to the mighty Ganges, Indus, and Brahmaputra Rivers, should be any different.
But when the team analyzed samples of glacier, what they found stunned them. Glaciers around the planet are usually dated by looking for two pulses of radioactivity buried in the ice. These are the leftovers from American and Russian atomic bomb testing in the 1950's and 1960's.
In the Naimona'nyi samples, there was no sign of the tests. In fact, the glacier had melted so much that the exposed surface of the glacier dated to 1944.
"We were very surprised not to find the 1962-1963 horizon, and even more surprised not to find the 1951-1952 signal," Thompson said. In more than twenty years of sampling glaciers all over the world, this was the first time both markers were missing.
He suspects the reason for this is that high-altitude glaciers, despite residing in colder temperatures, are more sensitive to climate change. As more heat is trapped in the atmosphere, he said, it holds more water vapor. And when the water vapor rises to high altitudes it condenses, releasing the heat into the upper atmosphere, where high mountain landscapes feel the brunt of warming.
"At the highest elevations, we're seeing something like an average of 0.3 degrees Centigrade warming per decade," Thompson said. "The Intergovernmental Panel on Climate Change (IPCC) projects 3 degrees of warming by 2100. But that's at the surface; up at the elevations where these glaciers are there could be almost twice as much, almost 6 degrees."
"I have not seen much as compelling as this to demonstrate how some glaciers are just being decapitated," Shawn Marshall of the University of Calgary said.
Marshall, who studies glaciers in North America, said it's striking how much worse glaciers near the equator are than those in the Canadian Rocky and Cascade mountain ranges.
The finding has ominous implications for the hundreds of millions of people who depend on the waters of the Naimona'nyi and other glaciers for their livelihoods. Across the region, no one know just how much water the Himalayas have left, but Thompson said it's dwindling fast.
"You can think of glaciers kind of like water towers, " he said. "They collect water from the monsoon in the wet season, and release it in the dry season. But how effective they are depends on how much water is in the towers."
it may be melting in cherry picked p... pawel110
16 y
1,839
but what does it have to do with humans?
Comments from Dr. Madhav Khandekar on the Live Science Himalayan Glacial retreat story Dr Radhakrishnan who I understand is at present President of Indian Geological Society. Radhakrishnan refers to a recent paper and also provides some details of the Siachin Glacier second largest outside of the Arctic Or Antarctic region. He recently wrote the following note to Benny Peiser. "You may find the following abstract of paper on Siachen glacier which has appeared in the latest issue of the Journal of the Geological Society of India (Vol.70(1), July 2007, pp.11-16). V.K. Raina and C. Sangewar write: "The Siachen glacier is the second largest glacier known outside the polar and sub-polar regions and the largest in the Karakoram Himalaya. The glacier with a length of 74 km is an example of the nature and size of the glaciers that must have once existed in the Himalaya towards the end of the last Ice Age. This glacier, primarily, because of its size has remained an important topic of glacier study and survey. Observation of the glacier front from 1862AD till date has revealed that there may have been a rapid advance of 700 m or so between 1862 and 1909, which was subsequently neutralized by relatively faster retreat between 1929AD and 1958AD. The glacier along its snout front has since been in rest mode, a term used in glaciology to depict glaciers with very low or practically nil retreat." Contrary to the general presumption that glaciers all over the world are rapidly retreating, the authors report that the Siachen glacier, Karakoram mountains, Ladahk is in a rest mode, with practically no observable retreat." I recall reading a Front-Page story in March/April 2007 when I was in India re: Himalayan Glacier shrinkage etc. The story appeared in the Times of India (one of the largest English daily newspapers in India) and referred to a study made by I think UNDP Or UNEP or similar UN Org. I have felt very disappointed about these UN Org. many of them seem to be supporting each other by way of producing similar reports on environment/GW etc. To me it is like "you scratch my back & I will scratch yours" attitude. None of these agencies have done any in-depth assessment about the reality of Himalayan glaciers completely melting away (or significantly) in the next fifty years and what it could mean to rivers like the Holy Ganges etc. I do not accept this simplistic and once again a scare-mongering news story with a potential to affect 500 million people. Allow me another view point, based on Hindu Mythology. I discussed this with some of my friends from Pune who are scholars of Hindu Mythology and history. There is a good documented history of India when Lord Rama ruled what is now http://icecap.us/index.php/go/joes-blog/himilayan_glacier_debate/
Hardly a week goes by without some story hitting the news about global warming and retreating glaciers, and for whatever reason, retreating glaciers in the Himalayan region get more than their fair share of coverage. The recent death of Sir Edmund Hillary served to further focus attention on this part of the world.
There are absolutely countless websites on the subject, and one of the first you will encounter for a “Global Warming Himalayan” search shows the map below (Figure1) from www.climatehotmap.org with tabs than can bring you all the news from the region.
Figure 1. Map showing global warming footprint regions from www.climatehotmap.org
Here are a few examples of what you will find behind the numberd tabs:
1. Llasa, Tibet — Warmest June on record, 1998. Temperatures hovered above 77°F for 23 days.
59. Garhwal Himalayas, India — Glacial retreat at record pace. The Dokriani Barnak Glacier retreated 66 ft (20.1 m) in 1998 despite a severe winter. The Gangorti Glacier is retreating 98 ft (30 m) per year. At this rate scientists predict the loss of all central and eastern Himalayan glaciers by 2035.
91. Nepal - High rate of temperature rise. Since the mid-1970s the average air temperature measured at 49 stations has risen by 1.8°F (1°C), with high elevation sites warming the most. This is twice as fast as the 1°F (0.6°C) average warming for the mid-latitudinal Northern Hemisphere (24 to 40°N) over the same time period, and illustrates the high sensitivity of mountain regions to climate change.
95. Tibet - Warmest decade in 1,000 years. Ice core records from the Dasuopu Glacier indicate that the last decade and last 50 years have been the warmest in 1,000 years. Meteorological records for the Tibetan Plateau show that annual temperatures increased 0.4°F (0.16°C) per decade and winter temperatures increased 0.6°F (0.32°C) per decade from 1955 to 1996.
126. Bhutan - Melting glaciers swelling lakes. As Himalayan glaciers melt glacial lakes are swelling and in danger of catastrophic flooding. Average glacial retreat in Bhutan is 100-130 feet (30-40 m) per year. Temperatures in the high Himalayas have risen 1.8°F (1°C) since the mid 1970s.
127. India - Himalayan glaciers retreating. Glaciers in the Himalayas are retreating at an average rate of 50 feet (15 m) per year, consistent with the rapid warming recorded at Himalayan climate stations since the 1970s. Winter stream flow for the Baspa glacier basin has increased 75% since 1966 and local winter temperatures have warmed, suggesting increased glacier melting in winter.
130. Mt. Everest - Retreating glacier. The Khumbu Glacier, popular climbing route to the summit of Mt. Everest, has retreated over 3 miles (5 km) since 1953. The Himalayan region overall has warmed by about 1.8°F (1°C) since the 1970s.
Very interesting and potentially effective to say the least, but an article forthcoming in the peer-reviewed scientific journal Theoretical and Applied Climatology tells a very different story – and a story that will not be featured anywhere but World Climate Report. The research was conducted by scientists from various Chinese institutions, Columbia University, and the University of Delaware; the work was funded by National Natural Science Foundation of China.
The Gou et al. team took 139 tree ring cores from 97 trees located in the valley of Qiemuqu in the Animagin Mountains in the northeastern Tibetan Plateau; you all realize from your geography classes that this valley produces a major headwater tributary of the Yellow River. They found that the tree ring widths were very highly correlated with summer maximum air temperatures in the region (the trees love cool summers), and this allowed for a surprisingly accurate way to reconstruct temperatures back 700 years. A bit of statistical wizardry was then applied to produce Figure 2 below.
Figure 2. Reconstructed maximum air temperature of the headwater area of Yellow River over the past 700 years. The 11-year moving average (imposed solid black line), and average air temperature (straight line) are depicted for reference (from Gou et al., 2008)
In their own words, Gou et al. observe “The ten-year average summer half-year maximum temperature in the 1990s is relatively high, but it is still colder than several other periods, including 1480s–1490s and 1590s–1600s. The 1480s is the warmest period in the past 700 years. The summer half-year maximum temperature can change significantly within decades.”
Even more amazing, with respect to all the material we see on the internet is their finding that “There is no warming trend for the reconstructed summer half-year maximum temperature since the Industrial Revolution in the northeastern Tibetan Plateau.” Further, we learn “The summer half-year maximum temperature in the northeastern Tibetan Plateau has increased since the 1980s, but it is not exceptional on centennial or millennial timescales. The ten-year average summer half-year maximum temperature in the 1990s was relatively high, but was still colder than several other periods.” You undoubtedly see now why this article will be immediately dismissed by the global warming crusade.
We will leave you with this exact quote, because it speaks volumes as they so clearly state
“There is no warming trend since the Industrial Revolution, in fact, the linear trend is negative.”
http://www.dailytech.com/Alaskan+Glaciers+Grow+for+First+Time+in+250+years/ar...
http://www.news.com.au/heraldsun/story/0,21985,24693398-5005961,00.html
http://www.theaustralian.news.com.au/story/0,25197,24723425-11949,00.html
http://www.odt.co.nz/the-regions/central-otago/30559/039unprecedented039-cold...
http://www.worldclimatereport.com/index.php/2008/01/21/antarctica-snowfall-in...
Its all a question of balance or equilibrium.
immoral waste of funding pawel110
16 y
1,956
