Aoraki / Mount Cook
New Zealand · Oceania
About
Aoraki / Mount Cook is the highest mountain in New Zealand. Its height, as of 2014, is listed as 3,724 metres (12,218 feet). It is situated in the Southern Alps, the mountain range that runs the length of the South Island. A popular tourist destination, it is also a favourite challenge for mountaineers. Aoraki / Mount Cook consists of three summits: from south to north, the Low Peak (3,593 m or 11,788 ft), the Middle Peak (3,717 m or 12,195 ft) and the High Peak. The summits lie slightly south and east of the main divide of the Southern Alps, with the Tasman Glacier to the east and the Hooker Glacier to the southwest. Mount Cook is ranked 10th in the world by topographic isolation.
The mountain is in the Aoraki / Mount Cook National Park, in the Canterbury Region. The park was established in 1953 and along with Westland Tai Poutini National Park, Mount Aspiring National Park and Fiordland National Park forms one of the UNESCO World Heritage Sites. The park contains more than 140 peaks standing over 2,000 metres (6,600 ft) and 72 named glaciers, which cover 40 percent of its 700 square kilometres (170,000 acres). The peak is located at the northern end of the Mount Cook Range, where it meets with the main spine of the Main Divide, forming a massif between the Hooker Valley to the southwest and the Tasman Valley east of the mountain. These two valleys provide the closest easily accessible view points of Aoraki / Mount Cook. A lookout point at the end of the Hooker Valley Track located only 10 kilometres (6 mi) from the peak has views of the entire mountainside. The settlement of Mount Cook Village, also referred to as "Aoraki / Mount Cook", is a tourist centre and base camp for the mountain. It is 7 kilometres (4.3 mi) from the end of the Tasman Glacier and 15 kilometres (9.3 mi) south of Aoraki / Mount Cook's summit. On clear days, Aoraki / Mount Cook is visible from the West Coast as far north as Te Miko, some 194 km (120 mi) away, and from most of State Highway 80 along Lake Pukaki and State Highway 6 south of Lake Pukaki. The near horizontal ridge connecting the mountain's three summits forms a distinctive blocky shape when viewed from an eastern or western direction. Another popular view point is from Lake Matheson on the West Coast, described as the "view of views", where on calm days, the peaks of Aoraki / Mount Cook and Mt Tasman are reflected in Lake Matheson.
Aoraki / Mount Cook receives substantial orographic precipitation throughout the year, as breezy, moisture-laden westerly winds dominate all year-round, bringing rainclouds from the Tasman Sea with them.
Annual precipitation around the mountain ranges varies greatly as the local climate is dominated by the eastward movement of depressions and anticyclones from across the Tasman Sea. The Aoraki / Mount Cook massif is a major obstacle to the prevailing westerly winds as they push depressions and associated cold fronts of moist air from the subtropics in the northwest against the mountain range. As the air rises towards the peaks, it expands and cools, and forms clouds. Rain and snowfall are often heaviest around the 1,200 m (3,900 ft) level and can last for several days if the front is slow-moving. As a result of the local weather patterns, the western slopes of Aoraki / Mount Cook can receive well over 10,000 mm (400 in) of annual precipitation, whereas the nearby Mount Cook Village, only 15 km (9 mi) south of the mountain, receives 4,484 mm (176.5 in) of rain or snowfall. While the weather on the eastern side of the mountain is generally better, rain or snow can quickly become widespread on that side as well if the wind turns to the south or southeast. This brings with it a rapid drop in temperature and poor visibility, adding to the difficult climbing conditions on Aoraki / Mount Cook. Temperatures at the mountain's base in the Hooker Valley around 800 metres (2,600 feet) range from −13 °C (9 °F) to 32 °C (90 °F), and generally fall just over 1 °C (1.8 °F) for every 200 metres (660 ft) of altitude. From about 1,000 m (3,000 ft) and higher, semi-permanent snow and ice fields exist during winter. Winter and spring are usually less settled than summer and autumn. Anticyclones often bring days of settled weather in summer, or clear cold conditions in winter with severe frost.
Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.