The Sinking of the M.S. Explorer: Implications for Cruise Tourism in Arctic Canada

BUILT IN 1969, AND AFFECTIONATELY KNOWN as “thelittle red ship, ” the MS Explorer was the first vesselspecifically designed for transport of passengers in the polar regions (Fig. 1). Under the name Lindblad Ex-plorer, she took passengers to Antarctica in the 1969–70 austral summer (Splettstoesser, 2000), and in 1984 sh

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

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

Observational constraints on an inflation model with a running mass

We explore a model of inflation where the inflaton mass-squared is generated at a high scale by gravity-mediated soft supersymmetry breaking, and runs at lower scales to the small value required for slow-roll inflation. The running is supposed to come from the coupling of the inflaton to a non-Abelian gauge field. In contrast with earlier work, we do not constrain the magnitude of the supersymmetry breaking scale, and we find that the model might work even if squark and slepton masses come from gauge-mediated supersymmetry breaking. With the inflaton and gaugino masses in the expected range, and $\alpha = g^2/4\pi$ in the range $10^{-2}$ to $10^{-3}$ (all at the high scale) the model can give the observed cosmic microwave anisotropy, and a spectral index in the observed range. The latter has significant variation with scale, which can confirm or rule out the model in the forseeable future.Comment: Latex, 19 pages, 14 figures, uses epsf.st

Searching for Signatures of Cosmic Superstrings in the CMB

Because cosmic superstrings generically form junctions and gauge theoretic strings typically do not, junctions may provide a signature to distinguish between cosmic superstrings and gauge theoretic cosmic strings. In cosmic microwave background anisotropy maps, cosmic strings lead to distinctive line discontinuities. String junctions lead to junctions in these line discontinuities. In turn, edge detection algorithms such as the Canny algorithm can be used to search for signatures of strings in anisotropy maps. We apply the Canny algorithm to simulated maps which contain the effects of cosmic strings with and without string junctions. The Canny algorithm produces edge maps. To distinguish between edge maps from string simulations with and without junctions, we examine the density distribution of edges and pixels crossed by edges. We find that in string simulations without Gaussian noise (such as produced by the dominant inflationary fluctuations) our analysis of the output data from the Canny algorithm can clearly distinguish between simulations with and without string junctions. In the presence of Gaussian noise at the level expected from the current bounds on the contribution of cosmic strings to the total power spectrum of density fluctuations, the distinction between models with and without junctions is more difficult. However, by carefully analyzing the data the models can still be differentiated.Comment: 15 page

Confirmatory factor analysis and differential relationships of the two subdomains of negative symptoms in chronically ill psychotic patients

Research suggests a two factor structure for negative symptoms in patients with psychotic disorders: social amotivation (SA) and expressive deficits (ED). Applying this two-factor structure in clinical settings may provide valuable information with regard to outcomes and to target treatments. We aimed to investigate 1) whether the factor structure is also supported in chronically ill patients with a psychotic disorder and 2) what the relationship is between these factors and functioning (overall functioning and living situation), depressive symptoms and quality of life. 1157 Patients with a psychotic disorder and a duration of illness of 5 years or more were included in the analysis (data selected from the Pharmacotherapy Monitoring Outcome Survey; PHAMOUS). A confirmatory factor analysis was performed using items of the Positive and Negative Syndrome Scale that were previously identified to reflect negative symptoms (N1-4, N6, G5, G7, G13, G16). Subsequently, regression analysis was performed on outcomes. The results confirmed the distinction between SA (N2, N4, G16) and ED (N1, N3, N6, G5, G7, G13) in chronically ill patients. Both factors were related to worse overall functioning as measured with the Health of the Nation Outcome Scales, ED was uniquely associated with residential living status. Higher scores for SA were associated with more depressive symptoms and worse quality of life. Thus, SA is most strongly related to level of social-emotional functioning, while ED are more related to living situation and thereby are indicative of level of everyday functioning. This subdivision may be useful for research purposes and be a valuable additional tool in clinical practice and treatment development