Perhaps everyone knows how glaciers work…a lot of snow (and I mean a lot of it, up to 50m to gain a compressing weight of its own) compacting into the ice with gravity pulling this mass down the hill. It may however be a bit harder for everyone to imagine the scale of the area where all this compacting happens.
Franz Josef Glacier is one of the smaller glaciers by world standards but quite a sizeable chunk of ice in New Zealand landscape.
On this photograph I’ve been hoping to show the vastness of the upper parts of this currently about 10km long glacier. With 2 highest peaks of the New Zealand’s Southern Alps dominating the background – Mount Tasman on far top left 3,497m and highest mountain Aoraki/Mount Cook 3,724m next to it on right, the vastness of the Geikie and Davis Snowfields of the Franz Josef Glacier is quite apparent.
This wonderful scene has been photographed just as the sun was dipping over the horizon of the Tasman Sea on right and I love the beautiful light bouncing over about 30 square km large NEVE in wonderful hues of purple, pink and orange. Hope you enjoy this image, too. Thank you.
When do we call a chunk of ice a glacier? Usually, the ice mass has to be at least 100m x 100m in size and needs to show some signs of a present or past movement.
Generally, glaciers are divided into two main groups – Ice Sheets and Valley Glaciers, each with several sub-types.
Ice Sheets or Continental Glaciers are the largest masses of ice on Earth spreading over 50,000 square kilometres with the depth of ice sometimes more than 4,200m. They are only found in Antarctica and Greenland. Ice Shelves are floating extensions (more…)
The most destructive and powerful hand of Mother Nature lies, arguably, in the cryosphere. We may not see it doing much immediate damage, but by observing the landscape we can see enormous changes in our environment caused by glaciers. One of the very typical and most visible footprints glaciers leave behind are our, often ice free, valleys. Entire mountainsides were remodeled by
The ice flow of a glacier is divided into two types, internal deformation and basal sliding. Internal deformation is movement of parts of the glacier relative to itself. Throughout the descent of the glacier, the ice at the sides and bottom side of the glacier are subject to more friction from the valley floor and walls, and therefore forced to move at a slower rate than the ice in the centre of the glacier. As a result (more…)
The Franz Josef Glacier is one of the fastest moving glaciers on Earth. Unlike most of glacier in the world the Franz Josef Glacier travels down very steep slopes of the Southern Alps. In the upper and very steep parts of the glacier, where the ice in the huge neve is squeezed into a narrow valley, the ice can move up to 5m each day during period of advance. (more…)
The unique environment of Westland National Park is responsible for the formation of the local glaciers. These powerful remnants of an ice age manage to survive warming temperatures due to the very special weather conditions on the West Coast of the South Island. Up to 16 metres of precipitation falls on the tops of the Southern Alps every year, most of it falling as snow. This massive amount of snow (more…)