Sea Ice in Canada’s Arctic: Implications for Cruise Tourism

Although cruise travel to the Canadian Arctic has grown steadily since 1984, some commentators have suggested that growth in this sector of the tourism industry might accelerate, given the warming effects of climate change that are making formerly remote Canadian Arctic communities more accessible to cruise vessels. Using sea-ice charts from the Canadian Ice Service, we argue that Global Climate Model predictions of an ice-free Arctic as early as 2050–70 may lead to a false sense of optimism regarding the potential exploitation of all Canadian Arctic waters for tourism purposes. This is because climate warming is altering the character and distribution of sea ice, increasing the likelihood of hull-penetrating, high-latitude, multi-year ice that could cause major pitfalls for future navigation in some places in Arctic Canada. These changes may have negative implications for cruise tourism in the Canadian Arctic, and, in particular, for tourist transits through the Northwest Passage and High Arctic regions.Bien que le nombre de voyages de croisières se soit accru régulièrement depuis 1984, certains commentateurs ont laissé entendre que la croissance de ce secteur de l’industrie touristique pourrait s’intensifier en raison des effets de réchauffement du changement climatique qui rendent des lieux de l’Arctique canadien autrefois éloignés plus accessibles aux navires de croisière. En nous appuyant sur les cartes de la fréquence de présence de glace de mer du Service canadien des glaces, nous soutenons que les prédictions du modèle climatique mondial selon lesquelles il n’y aurait plus de glace dans l’Arctique dès les années 2050 à 2070 pourraient engendrer un faux sens d’optimisme en ce qui a trait à l’exploitation éventuelle de toutes les eaux de l’Arctique canadien à des fins touristiques. Cela s’explique par le fait que le réchauffement climatique modifie le caractère et la répartition de la glace de mer, ce qui a pour effet d’augmenter la possibilité de la présence de glace de haute latitude datant de nombreuses années et capable de pénétrer les coques, glace qui pourrait présenter des pièges importants en matière de navigation future dans certains endroits de l’Arctique canadien. Ces changements pourraient avoir des incidences négatives sur le tourisme de croisière dans l’Arctique canadien et, en particulier, sur les transits touristiques dans le passage du Nord-Ouest et les régions de l’Extrême-Arctique

Cruise Tourism and Sea Ice in Canada's Hudson Bay Region

Tourism in the Hudson Bay region of central northern Canada generally is associated with non-consumptive forms of nature-based activities (such as polar bear viewing). However, the region has experienced variable growth in the cruise sector in recent years. This paper examines patterns of cruise activity in all subregions of the Hudson Bay region during three cruise seasons (2006, 2008, and 2009) and mainly reveals a pattern of decline. Since the prevalence of sea ice is an important part of visitor experiences of polar cruises, we examine sea ice change and occurrence of icebergs in the Hudson Bay region. Our sea ice analysis suggests that the length of the navigable shipping season is increasing in this region, which may facilitate both earlier and later shipping. But in terms of cruise traffic, we suggest that the demise of ice coverage signals a possible decline in cruise activity in most of the Hudson Bay region because ice-supported wildlife may shift north with the diminishing ice regime. Given the possible environmental and socio-cultural implications of changing cruise activity patterns in the Arctic and the absence of broad-scale monitoring and surveillance of the industry, use of these available data sources is vital to building a clearer picture.De manière générale, le tourisme dans la région de la baie d’Hudson du centre-nord du Canada se rapporte à des activités non consomptibles en plein air (comme l’observation des ours polaires). Toutefois, ces dernières années, le secteur des croisières de cette région a enregistré un taux de croissance variable. La présente communication se penche sur les tendances en matière de croisières dans toutes les sous-régions de la région de la baie d’Hudson au cours de trois saisons de croisière (2006, 2008 et 2009), ce qui laisse principalement entrevoir un déclin à cet égard. Puisque l’existence de glace de mer revêt une grande importance pour les visiteurs des croisières polaires, nous avons examiné les changements en matière de glace de mer et l’occurrence d’icebergs dans la région de la baie d’Hudson. Notre analyse de la glace de mer laisse voir que la longueur de la saison de navigation augmente dans cette région, ce qui peut avoir pour effet de faciliter la navigation en début et en fin de saison. Cela dit, sur le plan de la circulation de croisière, nous donnons à penser que la disparition de la couche de glace laisse entrevoir un déclin possible des activités de croisière dans la plupart de la région de la baie d’Hudson parce que la faune qui évolue sur la glace pourrait s’en aller vers le nord en raison du régime de glaces à la baisse. Compte tenu des incidences environnementales et socioculturelles susceptibles de découler des tendances changeantes relativement aux activités de croisière dans l’Arctique et de l’absence de suivi et de surveillance à grande échelle de l’industrie, il est essentiel de recourir aux sources de données disponibles afin d’obtenir un meilleur aperçu de la situation

Computing and Representing Sea Ice Trends: Toward a Community Consensus

Estimates of the recent decline in Arctic Ocean summer sea ice extent can vary due to differences in sea ice data sources, in the number of years used to compute the trend, and in the start and end years used in the trend computation. Compounding such differences, estimates of the relative decline in sea ice cover (given in percent change per decade) can further vary due to the choice of reference value (the initial point of the trend line, a climatological baseline, etc.). Further adding to the confusion, very often when relative trends are reported in research papers, the reference values used are not specified or made clear. This can lead to confusion when trend studies are cited in the press and public reports

The 2017 reversal of the Beaufort Gyre: Can dynamic thickening of a seasonal ice cover during a reversal limit summer ice melt in the Beaufort Sea?

During winter 2017 the semi‐permanent Beaufort High collapsed and the anticyclonic Beaufort Gyre reversed. The reversal drove eastward ice motion through the Western Arctic, causing sea ice to converge against Banks Island, and halted the circulation of multiyear sea ice via the gyre, preventing its replenishment in the Beaufort Sea. Prior to the reversal, an anomalously thin seasonal ice cover had formed in the Beaufort following ice‐free conditions during September 2016. With the onset of the reversal in January 2017, convergence drove uncharacteristic dynamic thickening during winter. By the end of March, despite seasonal ice comprising 97% of the ice cover, the reversal created the thickest, roughest and most voluminous regional ice cover of the CryoSat‐2 record. Within the Beaufort Sea, previous work has shown that winter ice export can precondition the region for increased summer ice melt, but that a short reversal during April 2013 contributed to a reduction in summer ice loss. Hence the deformed ice cover at the end of winter 2017 could be expected to limit summer melt. In spite of this, the Beaufort ice cover fell to its fourth lowest September area as the gyre re‐established during April and divergent ice drift broke up the pack, negating the reversal's earlier preconditioning. Our work highlights that dynamic winter thickening of a regional sea ice cover, for instance during a gyre reversal, offers the potential to limit summer ice loss, but that dynamic forcing during spring dictates whether this conditioning carries through to the melt season

Variability and change in the Canadian cryosphere

Abstract During the International Polar Year (IPY), comprehensive observational research programs were undertaken to increase our understanding of the Canadian polar cryosphere response to a changing climate. Cryospheric components considered were snow, permafrost, sea ice, freshwater ice, glaciers and ice shelves. Enhancement of conventional observing systems and retrieval algorithms for satellite measurements facilitated development of a snapshot of current cryospheric conditions, providing a baseline against which future change can be assessed. Key findings include: 1. surface air temperatures across the Canadian Arctic exhibit a warming trend in all seasons over the past 40 years. A consistent pan-cryospheric response to these warming temperatures is evident through the analysis of multi-decadal datasets; 2. in recent years (including the IPY period) a higher rate of change was observed compared to previous decades including warming permafrost, reduction in snow cover extent and duration, reduction in summer sea ice extent, increased mass loss from glaciers, and thinning and break-up of the remaining Canadian ice shelves. These changes illustrate both a reduction in the spatial extent and mass of the cryosphere and an increase in the temporal persistence of melt related parameters. The observed changes in the cryosphere have important implications for human activity including the close ties of northerners to the land, access to northern regions for natural resource development, and the integrity of northern infrastructure

The geographers in the cupboard: narrating the history of geography using undergraduate dissertations

This paper explores the possibilities of examining undergraduate dissertations as sources. By means of archival research on a collection of geography undergraduate dissertations at the University of Glasgow, comprising over 2,600 dissertations from 1954 to 2014, this paper argues for the epistemological value of both these ‘small’ knowledge productions and the experiences of becoming‐a‐geographer for studying the history of geography. A sustained study of the collection reveals that the dissertations comprise three kinds of sources: intellectual sources, seeing the dissertations as original pieces of academic research; cultural sources, examining the role of this ‘rites of passage’ in becoming a geographer; and lastly, as social sources, whereby the dissertations illuminate a diverse, personal network within and beyond the university. The vastness of the archival collection of undergraduate geography dissertations and the opportunities offered for a longitudinal examining of shifts within them over the years, revealing notable overall trends and traditions, ultimately discloses their own importance as exciting and striking original knowledge productions

Ecological Meltdown in the Firth of Clyde, Scotland: Two Centuries of Change in a Coastal Marine Ecosystem

BACKGROUND: The Firth of Clyde is a large inlet of the sea that extends over 100 km into Scotland\u27s west coast. METHODS: We compiled detailed fisheries landings data for this area and combined them with historical accounts to build a picture of change due to fishing activity over the last 200 years. FINDINGS: In the early 19th century, prior to the onset of industrial fishing, the Firth of Clyde supported diverse and productive fisheries for species such as herring (Clupea harengus, Clupeidae), cod (Gadus morhua, Gadidae), haddock (Melanogrammus aeglefinus, Gadidae), turbot (Psetta maxima, Scophthalmidae) and flounder (Platichthys flesus, Pleuronectidae). The 19th century saw increased demand for fish, which encouraged more indiscriminate methods of fishing such as bottom trawling. During the 1880s, fish landings began to decline, and upon the recommendation of local fishers and scientists, the Firth of Clyde was closed to large trawling vessels in 1889. This closure remained in place until 1962 when bottom trawling for Norway lobster (Nephrops norvegicus, Nephropidae) was approved in areas more than three nautical miles from the coast. During the 1960s and 1970s, landings of bottomfish increased as trawling intensified. The trawl closure within three nautical miles of the coast was repealed in 1984 under pressure from the industry. Thereafter, bottomfish landings went into terminal decline, with all species collapsing to zero or near zero landings by the early 21st century. Herring fisheries collapsed in the 1970s as more efficient mid-water trawls and fish finders were introduced, while a fishery for mid-water saithe (Pollachius virens, Gadidae) underwent a boom and bust shortly after discovery in the late 1960s. The only commercial fisheries that remain today are for Nephrops and scallops (Pecten maximus, Pectinidae). SIGNIFICANCE: The Firth of Clyde is a marine ecosystem nearing the endpoint of overfishing, a time when no species remain that are capable of sustaining commercial catches. The evidence suggests that trawl closures helped maintain productive fisheries through the mid-20th century, and their reopening precipitated collapse of bottomfish stocks. We argue that continued intensive bottom trawling for Nephrops with fine mesh nets will prevent the recovery of other species. This once diverse and highly productive environment will only be restored if trawl closures or other protected areas are re-introduced. The Firth of Clyde represents at a small scale a process that is occurring ocean-wide today, and its experience serves as a warning to others