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You are browsing the archive for New Zealand glacier Archives - From a Glacier's Perspective.

March 15, 2020

Glacier Retreat Drives 400% Lake Expansion Southern Alps, New Zealand 1990-2020

Landsat images  from 1990 and 2020 of the Mueller (M), Hooker (H), Tasman (T) and Murchison (Mn) Glacier.  Red arrows indicate the 1990 terminus location, yellow arrows the 2020 terminus location and pink arrows the upglacier extent of debris cover in 1990. Glaciers of the Southern Alps of New Zealand have been losing ice volume since 1978, with an increasing rate in the last decade (Pelto, 2016).  Gjermundsen et al …

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February 23, 2018

Mueller Glacier, NZ Terminus Collapse

Mueller Glacier (M) in a Landsat image from 1990 and a Sentinel image from 2018. Red arrow is 1990 terminus, yellow arrow 2018 terminus, blue arrow glacier flow, and pink arrow in 2018 ablation valley cut into glacier. Glaciers of the Southern Alps of New Zealand have been losing ice volume since 1978, with an increasing rate in the last decade (Pelto, 2017).  The NIWA glacier monitoring program has noted that volume …

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January 6, 2017

New Zealand Glacier Retreat will Impact Hydropower

  Map of the Waitaki Hydropower system, from Meridian and images of the system taken by Jill Pelto January 2017.   Hooker Glacier, Mueller, Murchison and Tasman Glacier drain into Lake Pukaki, where water level has been raised 9 m for hydropower purposes. Classen Glacier, Grey Glacier and Godley Glacier drain into Lake Tekapo. Lake Tekapo and Lake Pukaki are both utilized for hydropower. Water from Lake Tekapo is sent through a canal …

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March 24, 2016

New Zealand Glacier Change Index

  Terminus of Tasman, Mueller and Hooker Glacier terminus in Mount Cook 1972 map, no lake present. Progalcial lakes forming in front of Tasman, Mueller and Hooker Glacier in 1990 above and 2015 Landsat images below.  Red arrows are the 1990 terminus and yellow arrows the 2015 terminus locations.   Overview The Southern Alps of New Zealand are host to over 3000 glaciers that owe their existence to high amounts …

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March 14, 2016

Volta Glacier New Zealand Losing Lower Volta section

Comparison of Volta Glacier in 2001 and 2016.  Yellow arrow is the 2016 terminus position and the red arrow the NZ topo map terminus location.  Purple arrows indicate upglacier thinning and orange arrows regions of avalanching onto the lower Volta Glacier.  Volta Glacier drains northeast from Mount Aspiring entering the Waiatoto River.  This region is 60 km south of the main region of glaciers around Mount Cook. The glacier is …

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January 14, 2016

Murchison Glacier, New Zealand Rapid Retreat Lake Expands 1990-2015

Murchison Glacier change revealed in Landsat images from 1990 and 2015.  The red arrow indicates 1990 terminus location, the yellow arrow indicates 2015 terminus location and the purple arrow indicates upglacier thinning. Murchison Glacier is the second largest in New Zealand.  The glacier drains south in the next valley east of Tasman Glacier and terminates in a lake that is rapidly developing as the glacier retreats. The lower 6 km …

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January 11, 2016

Hooker Glacier Retreat, 1990-2015

Glacier change revealed in Landsat images from 1990 and 2015.  Mueller Glacier (M) and Hooker Glacier (H).  The red arrow indicates 1990 terminus location, the yellow arrow indicates 2015 terminus location and the purple arrow indicates upglacier thinning. Hooker Glacier parallels the Tasman Glacier one valley to the west draining south from Mount Hicks and Mount Cook.  Hooker Glacier is a low gradient which helps reduce its overall velocity and …

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November 5, 2015

Balfour Glacier, New Zealand Retreat 1990-2015

Balfour Glacier drains west from Mount Tasman in the Southern Alps of New Zealand.  The ablation is a low slope, 8 km long debris covered tongue extending from the terminus near 800 m to 1600 m.  The glacier is fed by avalanching off of Mount Tasman to the west, the southern flank of the Fox Range to the north and the northern flank of the Balfour Range to the south. …

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