Arrival Heights

Arrival Heights. This prominent ridge on Ross Island forms a significant scientific reserve and research outpost within the Ross Dependency territory administered by New Zealand. Situated near McMurdo Station operated by the United States Antarctic Program, the site is renowned for its exceptionally clean air, making it a premier global location for atmospheric and geophysical studies. Managed by Antarctica New Zealand, its unique environment is protected under the Antarctic Treaty System and specifically designated as an Antarctic Specially Protected Area.

Geography and location

The site is located on the Hut Point Peninsula, a distinctive landform extending from the southwestern coast of Ross Island in the Ross Sea. It lies approximately three kilometers north of McMurdo Station and overlooks Winter Quarters Bay and the McMurdo Sound. The topography is characterized by a series of volcanic scoria cones and ridges, with the primary facility situated at an elevation offering expansive views across the Ross Ice Shelf towards the Royal Society Range on the mainland. Its proximity to major international research hubs like Scott Base facilitates logistical support while its relative isolation helps preserve its pristine atmospheric conditions.

History and exploration

The area was first charted during the heroic age of Antarctic exploration by the British Discovery Expedition under Captain Robert Falcon Scott in the early 20th century. The name itself originates from the point where Scott's party first arrived on the peninsula after their initial journey from the expedition's ship, the RRS Discovery. Following this, the location saw intermittent use before being formally established as a scientific station in 1959 by the New Zealand Antarctic Research Programme. Its development was concurrent with the construction of nearby Scott Base and the expansion of McMurdo Station, cementing its role within the network of international research on the continent during the International Geophysical Year.

Scientific research and facilities

The station hosts a critical suite of instruments for monitoring the Earth's upper atmosphere and space weather, operated by institutions like the National Institute of Water and Atmospheric Research and collaborating with agencies such as NASA and the British Antarctic Survey. Key research focuses on phenomena like the aurora australis, geomagnetic storms, and the composition of the ozone layer. The clean air sector policy, enforced due to its Antarctic Specially Protected Area status, minimizes local pollution, allowing for precise measurements of trace gases and aerosols. Facilities include the Arrival Heights Laboratory, various radar arrays, spectrometers, and lidar systems that contribute data to global networks like the World Meteorological Organization.

Environmental protection and management

The entire site is designated as Antarctic Specially Protected Area No. 122 under the provisions of the Protocol on Environmental Protection to the Antarctic Treaty. This designation strictly controls human activity to prevent contamination and preserve its unique scientific value. Management plans are implemented by Antarctica New Zealand, which coordinates with the United States Antarctic Program and other national operators to enforce the clean air policy. Activities are limited to essential scientific monitoring and maintenance, with stringent waste management protocols. The area is also recognized for its exceptional geological and aesthetic value, contributing to its protected status alongside other significant areas like the Dry Valleys.

Climate and geology

The climate is characterized as a polar desert, with mean annual temperatures well below freezing, strong katabatic winds flowing from the Polar Plateau, and minimal precipitation. Geologically, the heights are part of the McMurdo Volcanic Group, composed primarily of basalt and scoria from the numerous volcanic vents that form the Hut Point Peninsula. The exposed rock formations provide a record of the volcanic history of Ross Island, which is dominated by the massive Mount Erebus stratovolcano. The dry, cold atmosphere and lack of liquid water result in extremely low weathering rates, preserving both the geological features and the clarity of the air essential for atmospheric research.