Dreifing vatns į botni jökla

Vatn į botni jökla hefur mikil įhrif į botnskriš og žar aš leišandi hreyfingu jökla.

Nś er unniš aš žvķ aš reikna hvernig vatn hreyfist į botni jökla, en žar spilar margt innķ - mikilvęgast er aš geta reiknaš hvernig vatnsžrżstingurinn breytist, bęši meš stašsetningu og tķma.

Water at the bed of glaciers

Water at the bed of glaciers has an important effect on sliding velocities. 

Work is in progress to model the distribution at the bed.  There are many things that control the distribution - both at a fixed location and as a function of time.

Dęmi 1 / Model example 1
Ķ vinnslu / work in progress

Dęmi um vatn sem rennur yfir hęšótt landslag.

Fyrsta myndin sżnir ašstęšur og nęstu 3 į eftir vatn į botni viš upphaf reikninga, og į tveimur sķšari tķmum.

Example showing water flow on a "bumpy" bed.

The first image shows the geometry and the following 3 the water at the bed at the beginning of calculations and at two consecutive times.

Dęmi 2 / Model example 2
Ķ vinnslu / work in progress

Dęmi um vatn sem rennur nišur dal.

Takiš eftir žvķ hvernig vatniš rennur ekki eftir botninum.

Example of water streaming down a valley.

Notice how the water moves up the sides of the valley.