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You are browsing the archive for New Zealand glacier retreat Archives - AGU Blogosphere.

6 January 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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14 March 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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14 January 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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11 January 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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5 November 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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27 January 2015

Crevasse Reduction and Retreat of Salisbury Snowfield-Almer Glacier, New Zealand

Almer Glacier is fed by the Salisbury Snowfield which also has its own terminus, and both are former tributaries to the Franz Josef Glacier.  In 2007 the Almer Glacier almost reconnected with Franz Josef Glacier.  The glaciers of the southern Alps have some of the highest recorded accumulation rates in their upper sections and highest ablation in the lower reaches. Anderson et al (2006), note accumulation rates exceeding 6 m on Franz …

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17 January 2014

Lyell Glacier retreat and separation, New Zealand

The Lyell and Ramsay Glaciers are the northernmost substantial valley glaciers in the Southern Alps of New Zealand. Their combined run-off is the chief source of the Rakaia River. The Lyell glacier was first observed by Dr.von Haast in 1862, from Mein’s Knob (M), at the time the glacier was 9 km long and ended close to Mein’s Knob. In 1949 Lyell glacier extended east from Rangiata Col some 7 …

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14 February 2013

Tasman Glacier Retreat Update 2013

Glacier change revealed in Landsat images from 1990 and 2015.Tasman Glacier.  The red arrow indicates 1990 terminus location, the yellow arrow indicates 2015 terminus location and the purple arrow indicates upglacier thinning. Illustrates the development of a proglacial lake and a 4.5 km retreat of Tasman Glacier in the last 25 years. The New Zealand National Institute of Water and Atmospheric Research has been examining the changes in volume and snowline …

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23 November 2012

Douglas Neve Glacier Retreat, New Zealand

The primary portion of the Douglas Glacier was a debris covered valley tongue that is separated from the slopes feeding the terminus reach. The feeder glacier tongues, pink arrows, end on the bedrock slopes above a steep cliff and do not reach the valley glacier below, blue arrows. One section of the glacier, the furthest west portion noted by a pink arrow, the Douglas Neve flows down a steep mountains …

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20 December 2011

Mueller Glacier retreat Lake Expansion, New Zealand

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. Volume loss in New Zealand glaciers is dominated by 12 large glaciers. The NIWA glacier monitoring program has noted that volume of ice in New Zealand’s Southern Alps has decreased 5.8 cubic kilometres, …

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8 December 2011

Gunn Glacier Retreat, lake expansion, New Zealand

Gunn Glacier is a small cirque glacier that lies beneath Mount Gunn. A lake has formed recently and is continuing to expand. The 2000 based map of the area published in , does not show a lake, but does at the terminus indicate a small water body surrounded by snow.  By 2015 the lake is shown in New Zealand Topo replacing much of the glacier area.  . Topographic Map from 2000 …

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22 February 2011

Murchison Glacier Retreat Increasing

Murchison Glacier drains southeast from the Mount Cook region, one valley east of Tasman Glacier. The end of the glacier terminates in a lake that is rapidly developing as the glacier retreats. This retreat will become rapid as 2010 imagery indicates other proglacial lakes have now developed 3.5 km above the actual terminus. These lakes are at a higher elevation and may not endure but do help increase ablation, and …

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2 May 2010

Donne Glacier Retreat New Zealand

Donne Glacier from 2003-2012 in Google Earth images.  Red arrow is the 2003 terminus and yellow arrow the 2012 terminus. Donne Glacier descends the spectacular east face of Mount Tutoka in southwest New Zealand. This glacier has been undergoing rapid retreat this decade creating a new alpine lake. The National Institute of Water & Atmospheric Research (NIWA) conducts an annual survey of the snowline of New Zealand glaciers. In order …

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