Lake Tuborg is a large lake on west-central Ellesmere Island, Nunavut. Part of the lake is meromictic, and contains trapped saltwater below about 55 m depth. The lake receives meltwater and sediments from multiple sources, including snowmelt and glacier melt. A lake process study was undertaken from 2001-2003 at Lake Tuborg that involved obtaining profiles of water temperature, salinity, transmissivity, and dissolved oxygen. Networks of short and long sediment cores were also obtained throughout the lake. During the last year of monitoring the lake and its sediments, a large catastrophic drainage of an ice-dammed lake occurred (a jökulhlaup). This was the largest jökulhlaup witnessed in Canada since 1947. Detailed measurements of lake conditions before, during, and after the jökulhlaup allowed the responses to be measured in great detail. The lake drained by floating its ice dam, an extremely rare drainage style in the Canadian High Arctic. The basin of Lake Tuborg closest to jökulhlaup inflow filled with fresh, cold and turbid water. A sill separates this basin from the larger more distal meromictic basin, and this sill effectively blocked turbidity currents from entering this basin. Conclusions from this phase of research include (1) salinity and temperature in the saltwater basin were minimally affected by the jökulhlaup, and (2) at a deep, distal location, an identifiable thick, coarse-grained, non-erosive deposit was produced by the jökulhlaup. The above conclusions allowed the varved sedimentary record to be examined for similar deposits in the past, with the assumption that similar deposits could be found in the long core record, the sediments could be dated, and that previous jökulhlaup deposits would also be nonerosive. Varve-thickness counting, Cesium-137 dating, and particle size analyses showed that prior to 1960, no similar events occurred in roughly the last thousand years. In addition, only three large jökulhlaups have occurred in the last thousand years, all of which occurred after about 1960. This significantly improves the understanding of the history of the lake, the surrounding glaciers, and the paleoclimate of the region. The lake bottom deposits that were sampled before, during and after the 2003 jökulhlaup were extraordinarily unique. A major part of the work of characterizing these deposits involved determining the size of their constituent particles. Image analysis of sedimentary particles using backscattered electron microscope imagery is a method to determine particle size at extremely high resolution. This tool improves on existing techniques since it automates the process of statistically processing images, quantifies the percentage of disturbances on images, and allows for extremely small measurement windows relative to particle size by implementing special particle counting rules.

Social media continues to serve as vehicles for fostering relationships with customers. One specific way to implement this is to create and operate brand fan communities on social networking sites. Brands can place posts (including videos, messages, quizzes, information, and other material) in these brand communities. By customer’s reposting or commenting on the posts, it subsequently reflects the brand post popularity. In order to investigate the possible drivers for brand post popularity in the Chinese social media context, this thesis selects Tuborg’s Green Fest as the case, its official account on Weibo as the platform, and analyzes the correlation between six driven factors and brand post popularity pairwise.  Results show that interactivity is the most important factor for popularity; a higher level of interactivity would help boost popularity. Followed by entertaining content and vividness are also two factors that positively related to brand post popularity. Moreover, the post theme of Fans interaction is most popular with fans, while the theme of Green Fest information would have negative impact on post popularity. Nevertheless, informational content is not welcome by the fans either, which may have a negative influence on popularity. Managers of brands that operate brand fan communities can be guided by this research with regards to deciding which characteristics or content to place in their brand posts.