Through the 1950s and 1960s there was a marked increase in recorded numbers of polar bears being killed for their hides, giving rise to world-wide concern that the species might be endangered. At a meeting in Fairbanks, Alaska 1965, representatives of circumpolar arctic nations discussed conservation of polar bears and concluded that international coordination of research and management efforts was essential. Subsequent meetings of scientists engaged in polar bear research were organized every two years by the International Union for the Conservation of Nature and Natural Resources, facilitating exchanges of views and cooperation; as a result, in 1973 the International Agreement on the Conservation of Polar Bears and their Habitats was signed in Oslo, Norway. This paper describes some of the research and management undertaken in the years leading up to the agreement, and initiatives that are continuing because of it.

British-Russian rivalry along the North Pacific littoral after 1815 was at once an extension of 18th century ambitions, commercial and geopolitical, and an enlargement of the interests of both nations in the existence of a Northwest Passage. John Barrow in Britain and Adam John von Krusenstern in Russia exhibited the opposing yet complementary interests of the two powers. British Admiralty activities resulted partly from a fear of Russian pre-emption, partly from ambitions for territorial and commercial aggrandizement. The Russian government supported the Russian American Company, and consolidated its overseas empire in Alaska. This paper describes die maritime activities and plans of both nations concerning the North Pacific and Northwest Passage, explaining political and territorial ambitions of the two powers that underlay the exploration, and their expansion of territorial empire and commerce in this area.

Development during approximately 200 years of agricultural activity in Alaska has been varied and generally inadequate. Four stages are here identified. During the period from Russian and early American colonization to the late 1880s production was largely for personal consumption. From 1898 to World War II federal intervention stimulated local commercial agriculture, and from the late 1940s to the late 1960s commercial production expanded. Since then a state- supported strategy to develop an export-based agriculture has been tried, but implementation has not been completed. Alaska remains a frontier which has yet to find a workable manner in which to implement a strategy for its agriculture.

During his voyage to the North American Arctic in 1829–933 John Ross was twice on the verge of discovering Bellot Strait, once in August 1829 and again in June 1832. The discovery would have done much to redeem his reputation, shattered in his earlier Arctic voyage of 1818, and might have helped him to delineate, or even sail through, a northwest passage. Using previously unpublished material, this article examines the circumstances in which Ross failed to recognize the strait, and suggests that, for reasons of personal rather than physical constraint, he did not take advantage of the two opportunities presented

Victorian and Edwardian travellers who ventured into little-known parts of the world formed essential links between the early pioneer geographical and scientific explorers, and modern tourists of today. While they were generally cultured people, interested in making useful observations in the areas they visited, they often indulged in travel for its own sake, devoting much of their lives to it almost as an addiction. Aubyn Bernard Rochfort Trevor-Battye (Figure 1) was just such a person. He was a gentleman of means who spent much time travelling, and can be considered a minor explorer. He excelled as an observer of peoples and wildlife; he was an adequate draughtsman, and his writing holds the attention of the reader though it lacks finesse. Of his verse, possibly the less said the better.

Samuel Hearne is best known to students of polar history because of his famous overland expedition of 1770–72, when he became the first European to reach the northern coast of North America at the mouth of the Coppermine River. Fewer know of his other notable journeys, in which he established Cumberland House as an inland trading post of the Hudson's Bay Company; fewer still may be aware of his capture, while Governor of Prince of Wales' Fort on Hudson Bay, by the French naval commander la Pérouse in 1782. That Hearne was an attractive and interesting character emerges clearly from his own account of his major expedition (a classic in exploration literature) and his other writings. However, he was also a figure of controversy, both during his life and subsequently, and this lends interest to his story.

In November 1986 the United Nations considered again the ‘Question of Antarctica’ and published a further study, up-dating and developing that produced in 1984 and guiding UN First Committee discussions of 18–19 November 1986. Three resolutions were adopted concerning availability of information to the UN on Antarctica, a moratorium on the Antarctic minerals regime negotiations, and the exclusion of South Africa as a Consulative Party. Most Antarctic Treaty parties did not vote; the consensus that characterized UN debates on Antarctica in 1983 and 1984 has yet to be restored. The 1986 session suggested more questions rather than providing answers; a key question is whether the Antarctic Treaty System will preserve its unity in view of the problem of continuing South African membership.

A load moving on sea ice, whether the weight of a vehicle or the pressure exerted by a low-flying aircraft, produces a deflection which can in extreme cases cause ice failure. The magnitude and shape of the deflection profile depends on the weight and speed of the vehicle) and also the the ice thickness and properties, with flexuralgraviry waves radiating from the source at speeds above a critical value. This wave pattern was studied in detail on flat, snow-free sea ice in McMurdo Sound, Antarctica. Surface strain was measured directly and microcracking activity monitored to correlate measured strain with possible generation of dangerous cracks. Speeds of up to 28 m sec-1 (60 mph) were achieved with a pickup truck, and up to 80 m sec-1 with a US Navy C131 aircraft. Initial comparison between theory and experimental results is very encouraging.

Declination, or the difference between true and magnetic north, is one of the earliest parameters to have been measured systematically over the earth's surface. Values are available for South Georgia and the surrounding area from 1700 to the present. Observations were made from ship by Edmond Halley in 1700, by James Cook in 1775 and thereafter more frequently. Land-based observations were made during the First Polar Year in 1882–3, more recently by the British Antarctic Survey 1975–82. Declination has diminished from 23°E in 1700 to about 9°W in 1980, approximately 0.1° per annum. The modern observations suggest that the rate of change has slowed in recent years.

Previously unpublished information from John Ross's expedition of 1829–33 to the Canadian Arctic indicates that Netsilik Inuit at that time manufactured and used clay-based ceramic pots. Additional published ethnohistoric and ethnographic sources indicate that the Sadlermiut Inuit, and probably the Utkuhikjalik and Qaernerimiut Inuit, also possessed ceramic technology. Considered in conjunction with survival characteristics of pottery, this suggests that the Thule ceramic complex was not restricted to early stages of Thule culture (AD 1000–1200) in the Eastern Arctic, but, at least in some areas, continued through to the early Historic period.

On 23 February the uppermost edge of the sun appeared briefly for the first time over the southern horizon; by 1 March the sun's full disc had appeared, and thereafter the daylight period lengthened rapidly. Apart from some minor cases of insomnia, lack of appetite and lassitude, the long period of darkness had had little effect on the wintering party in terms of either morale or physical health. Most importantly, there had been absolutely no sign of scurvy, undoubtedly due to the regular dose of vitamins which Dege insisted his men take, and to a substantial intake of reindeer meat over the winter.

The archaeological remains associated with a Netsilik Inuit camp, illustrated by John Ross at Sheriff Harbour, Boothia Peninsula, NWT in 1831, are described. The site, consisting of four tent rings and two external hearths, was originally occupied by 23 Inuit over a four-day period. Associated with a first-contact between Inuit and Europeans, and relating to a recorded historical event, the remains are of unique archaeological and historic interest, and an aid to the study of various site formation processes.

This study breaks new ground by involving the partners of Antarctic expeditioners as well as the expeditioners themselves in one aspect of a comprehensive research programme on stress. It reports the reactions of both parties before, during and after their separation. It shows that there were discrepancies between the partners about the sufficiency of prior discussion, the possibility of injury or death arising with the expeditioners on their hazardous venture, and about the ability of partners to cope at home. A follow up of the couples sixteen months after the separation showed that their marital relationships in general had improved slightly, although there were some individual exceptions. The study emphasised the importance of including partners as well as the specific subjects themselves in future medical and behavioural research; future studies might usefully extend beyond the couples to include all relevant family members.

Noaa Avhrr and Landsat MSS imagery acquired between January and November 1986 has shown substantial changes in the Antarctic coastline near the Filchner Ice Shelf, Larsen Ice Shelf and Thwaites Glacier. In the Filchner Ice Shelf area some 11,500 km of ice calved from mid-April onward. In the Larsen Ice Shelf area two large bergs calved between February and August. The combined volume of ice from these two events equals approximately three years' normal calving from the entire Antarctic coastline. In the Thwaites Glacier area several changes appear to have occurred at the base of Thwaites Iceberg Tongue and Thwaites Glacier Tongue.