From BYU News
Ice, when heated, is supposed to melt.
That’s why a collection of glaciers in the Southeast Himalayas stymies those who know what they did 9,000 years ago. While most other Central Asian glaciers retreated under hotter summer temperatures, this group of glaciers advanced from one to six kilometers.
A new study by BYU geologist Summer Rupper pieces together the chain of events surrounding the unexpected glacial growth.
“Stronger monsoons were thought to be responsible,” said Rupper, who reports her findings in the September issue of the journal Quaternary Research. “Our research indicates the extra snowfall from monsoonal effects can only take credit for up to 30 percent of the glacial advance.”
As Central Asia’s summer climate warmed as much as 6 degrees Celsius, shifting weather patterns brought more clouds to the Southeast Himalayas. The additional shade created a pocket of cooler temperatures.
Temperatures also dropped when higher winds spurred more evaporation in this typically humid area, the same process behind household swamp coolers.
The story of these seemingly anomalous glaciers underscores the important distinction between the terms “climate change” and “global warming.”
“Even when average temperatures are clearly rising regionally or globally, what happens in any given location depends on the exact dynamics of that place,” Rupper said.
The findings come from a framework Rupper developed as an alternative to the notion that glaciers form and melt in direct proportion to temperature. Her method is based on the balance of energy between a glacier and a wide range of climate factors, including wind, humidity, precipitation, evaporation and cloudiness.
Gerard Roe and Alan Gillespie of the University of Washington are co-authors of the new study.
Knowing how glaciers responded in past periods of climate change will help Rupper forecast the region’s water supply in the coming decades. She and collaborators are in the process of determining how much of the Indus River comes from the vast network of glaciers far upstream from the agricultural valleys of India and Pakistan.
“Their study can be used to help assess future glaciological and hydrological changes in the most populated part of our planet, which is a region that is now beginning to experience the profound effects of human-induced climate change,” said Lewis Owen, a geologist at the University of Cincinnati who was not affiliated with this study.
The spangled drongo
http://www.pbase.com/peterbray/image/84195279
I have recently (June ‘09) returned from the Hubbard Glacier in Alaska where we were informed it was growing at 22 feet per day.
That is one of the few that is actually growing. All the rest have been retreating for the last 10-12,000 years (thank goodness for that). Exit Glacier just happened to be one where the retreat over the last 200 years is very well documented. Same for Columbia Glacier in BC.
Thanks to Warmenism, I know all but the last fifty years was natural. Gore be praised.
Alan from Australia (00:38:27) :
“…in the Australian vernacular a “drongo” is a bit of an idiot.”
Yup – I guess that’s why my Aussie mate calls me a drongo…
As to the topic of glaciers:
Is there any institution that has a website that observes the general state of glaciers worldwide? I am thinking of something similar to the rightside tabs on WUWT for sea ice, sunspots, etc?
I know that there are many thousands of glaciers in the world and that not all of them have been studied. If anyone knows a good location to keep up with the glaciers I’d be interested in seeing it.
Thanks
Tim
“Their study can be used to help assess future glaciological and hydrological changes in the most populated part of our planet, which is a region that is now beginning to experience the profound effects of human-induced climate change,” said Lewis Owen, a geologist at the University of Cincinnati who was not affiliated with this study. [Emphasis added.]
Now, why would the university paper throw in such a connection to “human-induced climate change”, by an unaffiliated commentator, that was not made by the researchers, themselves?
SPATIAL PATTERNS OF HOLOCENE GLACIER ADVANCE AND RETREAT IN CENTRAL ASIA
Summer Rupper
Brigham Young University, Department of Geological Sciences, Provo, UT;
University of Washington, Department of Earth and Space Sciences, Seattle, Wa
Gerard Roe
University of Washington, Department of Earth and Space Sciences and Quaternary Research Center, Seattle, WA
Alan Gillespie
University of Washington, Department of Earth and Space Sciences and Quaternary Research Center, Seattle, WA
http://earthweb.ess.washington.edu/roe/Publications/RupperEtAl_Holocene_QR.pdf
Thanx to all for the info on the spangled drongo. I guess I was mistaken thinking it referred to an STD.
“Global Warming of 7C ‘Could Kill Billions This Century’”
Well, I suspect nearly 6 billion people will die this century, no matter what “Global Warming” does.
As glacier growth is mostly controlled by precipitation, and warming is supposed to increase that, if the glaciers are shrinking, does that mean warming isn’t happening?
This is so confusing.
Tim F – You mean a glacier graph like the one at http://nsidc.org/glims/glaciermelt/ ?
Smokey (07:13:11) :
“Thanx to all for the info on the spangled drongo. I guess I was mistaken thinking it referred to an STD.”
No – that would be the drangled spongo.
By the size and shape of its beak, I would say it eats most anything, not just insects. Similar to our ravens. It would also not astound me to discover that this bird is actually quite intelligent. Having an omnivore beak requires a bigger brain that can think, plan, and figure out how things work.
And to stay on topic, once a mountain range stops rising, all of its glaciers will eventually disappear. Even Greenland and Antarctica glaciers, when ever these land masses move into lower latitudes.
Remember the good old days when they meant the same thing?
The story of these seemingly anomalous glaciers underscores the important distinction between the terms “climate change” and “global warming.”
Hey Skipper (22:19:32) :
I was amazed to see how much the glacier had retreated since 1950 — around a mile. Clearly, AGW must be to blame.
However, I was just as amazed to see how much it had retreated between 1815 (the earliest date for which the investigators could establish a terminal moraine) and 1915 — around a mile and a half. In fact, the rate of retreat for Exit, and all other glaciers in Alaska, has been essentially continuous for over 200 years — as long as anyone has been around to measure the things.
Similar in observation to another portion of my previously mentioned blog entry from January 6th, 2009 titled “The Story Of Glaciers”
I find it sad and amusing at times when someone points to a particular glacier as proof of Global Warming. Usually and investigation of that glacier will show that, like the Muir, most ice volume loss / glacial retreat occurred long before the industrial revolution. Long before the 20th century. It is amazing that so many fail to mention the history of a glaciers retreat.
Pamela Gray (08:38:27) :
And to stay on topic, once a mountain range stops rising, all of its glaciers will eventually disappear. Even Greenland and Antarctica glaciers, when ever these land masses move into lower latitudes.
This time you have me confused Pamela.
I agree that, in some regions, the altitude of a glacier will impact its status. I don’t believe a static altitude would, by itself, mean a glacier would disappear and that other factors would have to come into play for it to retreat. Am I incorrect?
I do agree that land masses such as Greenland and Antarctica moving to lower latitudes would have an impact on their glacial inventory. That, of course, assumes that earth maintains the same orbital characteristics as it currently has, the effect of changes in ocean location and currents, etc.
Some time ago in a discussion I stated that if man really wants to force a change in the climate ( precipitation, drought, storm patterns, and temperatures ) all he needs to do is remove the Isthmus of Panama.
I recall a commenter, I think at Tim Blair’s old blog, commenting that while visiting the Swiss Alps that their version of a Parks Service showed how the glaciers were smaller in Roman times than today. Personally, I blame chariot over-use.
I believe this study will begin the decoupling of glaciology from AGW. In fact, there was never any reason to suppose that glacier advance or retreat has anything to do with supposed forcings of a couple of watts/m2. Yet, when skeptics have pointed out that there are many glaciers still advancing, the warmists always retort that this is merely due to micro climate. Now they will be forced to admit that even retreating glaciers are the result of micro climate.
Glaciers have in general been retreating since the end of the Litle Ice Age. For trends in glaciers in may parts of the world see: http://www.appinsys.com/GlobalWarming/GW_4CE_Glaciers.htm
Glacier movement can be as bad a metric for climate change as daily weather.
For daily weather the cure is more time…say 30 years.
For glacier movement the cure is less time…say the past 35 years, with any pre-existing (usually melting) trends removed.
“…9000 years ago. While most other Central Asian glaciers retreated under hotter summer temperatures, this group of glaciers advanced…”
This is comparable to the current situation of some Karakorum mountain glaciers. They are expanding, while the other Himalayan glaciers are retreating.
savethesharks (19:31:39)
“Glacier growth & retreat is more closely correlated with precipitation swings…as opposed temperature swings.”
I’ve read that warmer waters around Greenland and Antarctica have led to the increased snowfall on land.
I think that this might also apply to ‘nearby’ (high latitude) mountain glaciers that are increasing; in New Zealand, Chili, Argentina and western Norway.
And, I’ve seen the higher precipitation explanation given for the Shasta/Trinity mountain glaciers.
Philip_B (19:35:09)
“All else being equal ‘melting’ glaciers increase river flows. Increasing glacial mass decreases river flows”
Conceivably, a prolonged cold spell might reduce river flows. But the glacier and the snowpack would move downhill, until they reached warmer temperatures.
Retreating (melting) glaciers will increase river flows for a few decades until the ice and its meltwater are all gone. And then this summertime water supply will be gone.
The Chinese understand this. They are building dams to store some of the water that is now stored in the glaciers.
John Trigge (23:24:26)
Hey Skipper (01:06:41)
“Hubbard Glacier is the largest tidewater glacier on the North American continent. It has been thickening and advancing toward the Gulf of Alaska…This is in stark contrast with most glaciers which have thinned and retreated during the last century. This atypical behavior is an important example of the calving glacier cycle in which glacier advance and retreat is controlled more by he mechanics of terminus calving than by climate fluctuations…”
This is what might be called a ‘statement of the bleedin’ obvious’.
There’s some very good examples in the European Alps of microclimates which get snow under different wind conditions and, hence, may show markedly different snow conditions in winter, which is of course very important to the ski tourism industry.
For example: the Jungfrau resorts of Wengen, Grindelwald and Muerren get far more snow early in the winter on NW to NE winds than on SW winds, when they tend to get rain via Foehn.
In contrast, Zermatt, Saas Fee and the upper Rhone Valley (Goms) get humungous snowfalls on SW to SE winds, but almost nothing on NW winds.
You could therefore easily imagine that a century of climate where SW to SE winds predominated could lead to advancing glaciers in the Zermatt And Saas valleys, with rapidly retreating glaciers on the Northern side of the 4000m Jungfrau peaks.
Last winter was a classic example of huge early snowfalls in the valleys to the south and east Rhone valley on SW to SE winds bringing huge numbers of Foehns to the Jungfrau. Luckily for them, they got one big dump before Christmas too.
You could easily see a similar situation of sorts happening in Britain.
If the Azores high moves north marginally for a century, then SE Britain will become warmer and drier, whereas NW Britain will become cooler and wetter in summer. And if the high moves further north west in winter, then Scotland could become far colder and snowier in winter, although Greenland would become much milder.
It may be time for a global conversation with local weather gurus, who may well not be ‘scientists’. If you document 20,000 sets of local knowledge passed down over decades if not centuries, then we may get to a position approximating to knowledge. Because that knowledge can be used to compare to ‘models’.
I translate spangled drongo as “fortunate fool”
Suggesting glaciers respond to temperature alone is like saying river flow responds to temperature alone. A glacier is merely a river flowing very slowly, more rainfall will result in increased flow or thickness. Temperature does play a smaller role, but rainfall is the key. Thats why the Fox and Franz Josef glaciers are growing at the moment, whereas the nearby Tasman and Hooker glaciers are receding. Plus large glaciers can take hundreds of years to respond, as build up of ice or fern is required at the headwaters to push the glacier further down the valley.
So if the glaciers are currently declining in India, does that imply global cooling by their logic?
Recent space observation Glacier British Colombia:
http://earthobservatory.nasa.gov/IOTD/view.php?id=39985&src=eorss-iotd
Tim F (04:35:31) :
“As to the topic of glaciers:
Is there any institution that has a website that observes the general state of glaciers worldwide?”
Gary Pearse (20:03:13) :
“I have emailed the WGMS (World glacier monitoring people) about the fact that their last report was for 2005/2006 and a preliminary for 2006/2007. Do you suppose, given all the anecdotal evidence for recovery of world glaciers that they may be waiting until after the Copenhagen warm-in. Surely the data must be in by now (or its too late!)”
Tim, here is the link: http://www.wgms.ch
but don’t hold your breath, they are a couple of years behind. I urge everyone interested to email them to get a response on the 2007/2008 season. You will note when you do look at 2006 and preliminary 2007 that there is an increase in the number of world glaciers for the latest report.
Oops, last sentence should read:
You will note when you do look at 2006 and preliminary 2007 that there is an increase in the number of world glaciers advancing for the latest report.