Tibet

From Chengdu (previous) post we flew to Tibet for our actual field work. This involved a long journey that started with a flight to Lhasa. We had an extra day in Lhasa and used it to visit the Potola (palace of the Dalai Lama) and some of the cultural sites. Lhasa has grown immensely and is a modern city that seems to be expanding really rapidly. Everywhere in Tibet there is an unbelievable amount of infrastructure building at rates that we are not used to in the West.

From Lhasa we drove for two days to the east, first to Nyingchi and then Bomi, both towns with lots of construction, highway building, etc. We then stayed in Bomi from where we accessed the 24K Glacier, named after its distance from Bomi. The road leads right up to the glacier, so access is quite easy. The glacier front is at about 3800 m asl, but that wasn't so problematic since we had spent most of the last few days at slightly below 4000 m, and actually interrupted our drive to walk around a bit at mountain passes as high as 4500 m.

Working in Tibet is definitely different from other field work I've done. We worked through collaborators at the Institute for Tibetan Plateau Research. These collaborators were hugely important, because they paved the way for us in terms of permits (you need a permit for everything), cars (with drivers), and some equipment.

The country we got to see is absolutely spectacular with some very impressive topography. Because we were at the eastern edge of the Tibetan Plateau, we still have monsoon influence and a fair amount of moisture and clouds. So you don't get too many blue sky days, but it is still unbelievable how big and how rugged this country is.

Once on the glacier we did a variety of work involving UAVs, timelapse cameras, thermal cameras, ice penetrating radar (that was my contribution), mass balance, and terrestrial laser scanning. The goal is to get a detailed understanding of how this glacier, whose lower part is almost entirely covered in debris, is reacting to climate change, and how that differs from cleaner glaciers in similar climate.

Here are a few pictures:

The Potola Palace by night. Pictures cannot really capture how huge this palace is. We went on a tour of it, but weren't allowed to take any pictures inside the many, many temples. The extent of the temples and the amount of Buddha statues and decorations, often made of solid gold, are absolutely stunning.

The Chinese Communist Party is omnipresent in Tibet

... and nothing goes unsupervised. There are security cameras everywhere, especially in Lhasa

Drive to Nyingchi

Spectacular fall colors

There is an amazing amount of brand new infrastructure including high-tension power lines in some really difficult terrain

The Chinese are really trying to push for tourism, although it seems to be mostly aimed at Chinese tourists, although many signs are in English as well.

The amount of topography in Tibet is mind-blowing. This is the area of the Earth's deepest gorge in the headwaters of the Brahmaputra River.

This young mountain range together with the really steep topography makes for lots of erosion and valleys with big lobes of debris flows are seen everywhere and form a major challenge for all infrastructure

We commuted daily from Bomi, which is also growing very rapidly. I think until a few years ago it was essentially impossible for Westeners to even go here. Now there are parts that look more like Las Vegas than what one might have in mind for Tibet.

The road ends conveniently close to the glacier

Right by the parking lot is a monastary

We visited the monk who was very friendly. The photos shows some of the Chinese scientists and Tibetan field helpers.

The view from the monastery to the glacier. The lower glacier is all debris covered except for a prominent ice face at the front of the glacier. Prayer flags are everywhere, even quite high up on the mountain side.

A close-up of the ice face. This nicely shows that the debris cover is really quite thin and underneath it's almost entirely clean ice.

A weather station

A view of the neighboring glacier: 23K Glacier. Where did that name come from?

The glacier has a number of ice cliffs. These are interesting because they are places of enhanced melt, while the debris largely protects the ice from melt.

There are some incredibly steep hanging glaciers on these mountains.

The monastery from the glacier

We did some ice radar in the fresh snow; winter is starting.

This is an example of a radar profile. The blue line is the modeled bed elevation and red are our measurements.

Umbrellas are helpful in this wet weather.

Drilling some poles with steam. Because the rock is only on the surface, steam works quite well to drill holes into the underlying ice.

Our last day turned out to be very beautiful and on the way back to Bomi we saw this amazing mountain that we hadn't seen all week.

We had one spare day, a 'rest' day. So we got up extra early and did a high altitude hike.

A view of the glacier from high up. It nicely shows the lower debris covered part of the glacier