4. Peoples of the Arctic

‘Peoples of the Arctic’ focuses on the 4 million people that live north of the Arctic Circle, providing an important distinction between indigenous and settler residents, as over 1 million indigenous peoples live in the eight Arctic states. Archaeological evidence suggests that the first people in the Arctic arrived about 40,000 years ago as there were Upper Palaeolithic hunting communities in north-eastern Siberia. There is considerable diversity of indigenous peoples that have called the Arctic home. Arctic demographers predict that more and more Arctic peoples will be based in towns and cities, but in the Russian and North American Arctic there will still be dispersed and small-scale settlements. Indigenous peoples of the Arctic are culturally, economically, and politically active in all the Arctic states.

Dorset Harpoon Endblade Hafting and Early Metal Use in the North American Arctic

Composite tool hafting research has touched upon almost every era and region of human history. One aspect that has seen little attention is how those traces of hafting strategies might reflect the raw material of the endblade that an organic handle would have held. This aspect is particularly important for clarifying the scope and scale of novel raw material use in contexts that have concurrent use of different lithic, bone, and metal materials. This article analyzes harpoon heads from the Canadian Arctic in Dorset cultural contexts and identifies three different hafting techniques employed across time. For roughly one millennium, Dorset groups used a single harpoon endblade hafting technique. After AD 500, new hafting techniques were developed, corresponding with the emergence of metal use. Some of these methods are not compatible with common chipped stone materials and signal an increase in metal endblade production. However, surviving metal objects are underrepresented in museum collections because of various taphonomic processes. By recognizing the materials of the harpoon endblade and the specific constraints of some hafting techniques, it is possible to identify what these endblade materials may have been and expand the known extent and intensity of early metal use by observing the hafts alone.

Timing of Breeding Site Availability Across the North-American Arctic Partly Determines Spring Migration Schedule in a Long-Distance Neotropical Migrant

Long-distance migrants are under strong selection to arrive on their breeding grounds at a time that maximizes fitness. Many arctic birds start nesting shortly after snow recedes from their breeding sites and timing of snowmelt can vary substantially over the breeding range of widespread species. We tested the hypothesis that migration schedules of individuals co-occurring at the same non-breeding areas are adapted to average local environmental conditions encountered at their specific and distant Arctic breeding locations. We predicted that timing of breeding site availability (measured here as the average snow-free date) should explain individual variation in departure time from shared non-breeding areas. We tested our prediction by tracking American Golden-Plovers (Pluvialis dominica) nesting across the North-American Arctic. These plovers use a non-breeding (wintering) area in South America and share a spring stopover area in the nearctic temperate grasslands, located >1,800 km away from their nesting locations. As plovers co-occur at the same non-breeding areas but use breeding sites segregated by latitude and longitude, we could disentangle the potential confounding effects of migration distance and timing of breeding site availability on individual migration schedule. As predicted, departure date of individuals stopping-over in sympatry was positively related to the average snow-free date at their respective breeding location, which was also related to individual onset of incubation. Departure date from the shared stopover area was not explained by the distance between the stopover and the breeding location, nor by the stopover duration of individuals. This strongly suggests that plover migration schedule is adapted to and driven by the timing of breeding site availability per se. The proximate mechanism underlying the variable migration schedule of individuals is unknown and may result from genetic differences or individual learning. Temperatures are currently changing at different speeds across the Arctic and this likely generates substantial heterogeneity in the strength of selection pressure on migratory schedule of arctic birds migrating sympatrically.

Interannual variability in methane and nitrous oxide concentrations and sea-air fluxes across the North American Arctic Ocean (2015–2019)

Between 2015–2018, we collected ~2000 measurements of methane (CH4) and nitrousoxide (N2O) concentrations in the North American Arctic Ocean during summer and early fall from water column profiles. We also obtained 25 measurements of CH4 and N2O concentrations in rivers along the Northwest Passage and Ellesmere Island in mid-summer 2017–2019. Our results show that N2O is generated in the highly productive Bering and Chukchi Seas and transported northeastward, producing a persistent subsurface N2O peak in the Beaufort Sea. The Chukchi and Beaufort Sea sediments are a significant source of CH4 to the water column. These sedimentary sources and associated water column consumption display significant spatial gradients and interannual variability. CH4 isotope data demonstrate the importance of CH4 oxidation across the study region. We find that rivers are not a significant source of CH4 or N2O to the Arctic Ocean at the time of year sampled. The estimated annual sea-air flux across the study region (2.3 million km2) had a median (interquartile range) of 0.009 (0.002, 0.023) Tg CH4 y-1 and −0.003 (−0.013, 0.010) Tg N y-1. These results suggest that the North American Arctic Ocean currently plays a negligible role in global CH4 and N2O budgets. Our expansive dataset, with observations at many repeat stations, provides a synopsis of present-day Arctic CH4 and N2O distributions and their range of variability, as well as a benchmark against which future climate-dependent changes can be evaluated.

Opening an Arctic Escape Route: The Bellot Strait Expedition

During the second half of the 1950s, Canadian and American vessels surged into the North American Arctic to establish military installations and to chart northern waters. This article narrates the expeditions by the eastern and western units of the Bellot Strait hydrographic survey group in 1957, explaining how these “modern explorers” grappled with unpredictable ice conditions, weather, and extreme isolation to chart a usable Northwest Passage for deep-draft ships. The story also serves as a reminder of the enduring history of US Coast Guard and Navy operations in Canada’s Arctic waters in collaboration with their Canadian counterparts. Au cours de la deuxième moitié des années 1950, des navires canadiens et américains ont envahi l’Arctique nord-américain pour y établir des installations militaires et cartographier les eaux du Nord. Le présent article traite des expéditions des unités est et ouest du groupe de levés hydrographiques du détroit de Bellot en 1957 et explique comment ces « explorateurs modernes » ont été confrontés à des états de glace imprévisibles, à des conditions météorologiques et à un isolement extrême en traçant un passage du Nord-Ouest utilisable pour les navires à forts tirants d’eau. Le récit nous rappelle également l’histoire durable des opérations de la Garde côtière et de la Marine américaines dans les eaux arctiques du Canada en collaboration avec leurs homologues canadiens.