May 18, 2012

A TALK ON THE HIMALAYAN MOUNTAINS: "DON’T CLIMB EVERY MOUNTAIN"

[Sadly, events on the south (Nepalese) side of Mount Everest this season suggest that while the risks inherent in climbing the mountain have never been greater, a majority of Everest climbers are increasingly estranged from the decision-making process. Two intersecting trends are to blame: the rising number of people attempting the mountain, and the cumulative effects of global warming, which is slowly yet steadily drying out the Himalayas, resulting in rockfalls, avalanches and sérac collapses.]
By Freddie Wilkinson
Mt. Sagaramatha. Image Gurinder Osan/Associated Press

Kathmandu, Nepal: ALL mountain climbs contain an element of risk. How a mountaineer chooses to approach that risk, using the sum of the physical, mental and emotional powers at his or her disposal, is the basic challenge of the endeavor. At its best, mountaineering rewards shrewd and independent decision making. 


Sadly, events on the south (Nepalese) side of Mount Everest this season suggest that while the risks inherent in climbing the mountain have never been greater, a majority of Everest climbers are increasingly estranged from the decision-making process. Two intersecting trends are to blame: the rising number of people attempting the mountain, and the cumulative effects of global warming, which is slowly yet steadily drying out the Himalayas, resulting in rockfalls, avalanches and sérac collapses.

The sheer number of people courting Everest — this season, approximately 750 foreign climbers and local Sherpas, from 32 expeditions — has created a system whereby the entire climbing route is institutionally maintained. Approximately six miles of rope is strung up the mountain each April, secured by hundreds of snow pickets and ice screws. Sections of aluminum ladder are employed to span crevasses too wide to safely step across.

The principal organization responsible for this artificial trail is the Sagarmatha Pollution Control Committee, a professional cadre of climbing Sherpas known as the icefall doctors. Although important decisions are generally made by rough consensus among expedition leaders, and often guides and volunteers will help with maintaining the route, a vast majority of climbers simply start at the bottom of the mountain and go where the ropes lead them.

The classic route from the south, as pioneered by the British in 1953, follows the Western Cwm, a natural valley, and is exposed to falling hazards for much of the way. Climbers must contend with two notorious risks: the Khumbu Icefall and the Lhotse Face.

This season, hampered by dry conditions, the mountain has been dangerously alive. Last week, rock fall on the Lhotse Face resulted in a half-dozen serious injuries, and one very near miss was reported when a titanic avalanche ripped between camps 1 and 2, thundering completely across the valley and obliterating the trail. “At certain times during the day there are more than 50 people on this path,” the writer Mark Jenkins wrote recently in a dispatch from the mountain for National Geographic’s Web site.

Climbers speak of two kinds of hazards: objective and subjective. The subjective risks are those you can potentially control through skill and experience. The objective ones are events like avalanches and icefall that don’t care who you are, only that you are in the wrong place at the wrong time. Rarely has so much of the latter been stacked up against so little of the former. Although there were a few complaints whispered through base camp that perhaps a safer route was possible through the icefall, more to the center of the formation, and the lines on the Lhotse Face were moved farther to the side in response to intense rockfall that was strafing the normal line, most climbers seemed to accept these dangers as unavoidable.

In the end, mountaineers have one final option at their disposal. They can choose not to be there in the first place.
Last weekend, Russell Brice, owner and operator of Himalayan Experience, one of the largest and most respected operations on the mountain, told his combined team of more than 60 clients, guides and climbing Sherpa staff members that he was canceling the rest of their season. On his Web site, Mr. Brice was succinct: “I had long and serious talks with the Sherpas, the icefall doctors and my guides, and we have made the decision to cancel the expedition. We can no longer take the responsibility of sending you, the guides and the Sherpas through the dangerous icefall and up the rockfall-ridden Lhotse Face.”
Everest summit season, traditionally stretching from the second week of May to the beginning of June, is upon us. The world will probably soon hear of great triumphs on the peak, and there is equal capacity for great calamity. May the shrewdest and most independent decision of the season not go unnoticed.
Freddie Wilkinson is a guide, author and climber from Madison, N.H.
The New York Times

[They have claimed that the massive ice fell about the height of 6,500 m from Annapurna IV (7525m) and blocked the gorge of Seti River due to which the newly formed river lake outburst and caused the devastated flood.] 

KATHMANDU: A well known environmentalist and renowned mountaineer Mr Ken Noguchi, the famous journalist Mr Jun Hiraga from Japan claimed after the research and investigation into the devastating Seti River flood area that climate change effects was to blame for the flood.

The team including the two Nepalese Sirdar Minga Norbu Sherpa and Mingma Adhikari visited the flood affected area through helicopter for the investigation.

They have claimed that the massive ice fell about the height of 6,500 m from Annapurna IV (7525m) and blocked the gorge of Seti River due to which the newly formed river lake outburst and caused the devastated flood.

The team has claimed there was no possibility of melting snow in such the massive form though the rising temperature due to climate change would cause gradual melting of the snow pieces.       



LANDSLIDE LOSSES IN NEPAL

[At the request of a few people, the graph below shows the data for the period 1980 to 2010 inclusive. The solid black line shows the numbers of recorded deaths due to landslides in Nepal for each year for the period 1980 to 2010, whilst the dashed line shows the number of recorded landslides that caused one or more deaths:] 
By Dave Petley
For the last decade I have maintained a database of landslides that cause loss of life in Nepal. This work was started as part of a DfID project on landslide risk assessment for rural roads in that country and in Bhutan. As part of that project we tried to extend the database back to 1968, although the older data is less robust, This work is now part of the larger project that I undertake on landslide-induced fatalities, but I retain a particular interest in Nepal because it is both highly landslide prone and subject to rapid changes in both climate and social setting.  This data is written up properly in Petley et al. (2006) – this can be downloaded for free from here, with an update in Petley (2009) and a write up of the role of climate on landslide occurrence acoss Asia in Petley (2010).

At the request of a few people, the graph below shows the data for the period 1980 to 2010 inclusive. The solid black line shows the numbers of recorded deaths due to landslides in Nepal for each year for the period 1980 to 2010, whilst the dashed line shows the number of recorded landslides that caused one or more deaths:

The graph also shows one other dataset.  This is, in grey, the average monthly precipitation for central Nepal for the period June-August for each year.  This is GPCC data, with the dataset running from 1986 to 2010.

There are several things to note here.  First, all three datasets show a rising trend with time, though all show considerable inter-annual variability.  The last few years have been noticeably worse than this before 2000.  The period around 2002 was particularly bad – this is discussed in the paper above.  It is interesting to note that average monthly summer precipitation (rainfall) is also apparently increasing in central Nepal.  
Almost all the annual rainfall in Central Nepal falls in the summer monsoon, which runs June to September in Nepal.  There is some obvious correlation between the average monthly summer rainfall and the number of landslides that occur; this is captured in the following regression.  Note that I have spilt the data into two periods – 1986 to 1999, when the data are less robust as the database was constructed retrospectively, and 2000 to 2010 when the data are better.  Although there is considerable scatter, it is clear that years with more intense rainfall are associated with more landslides.