| 1. |
- de Woul, Mattias, 1972-
(författare)
-
Response of glaciers to climate change : Mass balance sensitivity, sea level rise and runoff
- 2008
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this study is to enhance our understanding of the response of glaciers to climate change. Global sea level is affected by changes in glacier ice volume, and melt-water from glaciers is a principal water source in many regions. This study applies glacier mass balance modelling, with varying complexity and spatial resolution, ranging from individual glaciers to regional and global assessments of glacier mass losses. Glaciers located in maritime environments generally show considerably higher mass balance sensitivities than those in continental settings. On average, an assumed increase in annual precipitation of +10% tends to offset the effect of an annual temperature change of +1 K, by roughly 20%. Two case studies, at Storglaciären, Sweden, and Hofsjökull, Iceland, involve model results of future mass balance change and glacier melt induced changes in runoff. Applying a temperature and precipitation scenario for Iceland in 2050 results in increased total runoff from Hofsjökull by roughly one third, and results emphasize the role of the firn layer in delaying water flow through glaciers, yielding a redistribution of discharge within the year. Based on a global gridded data set of glacierized area, the sea level equivalent from all mountain glaciers and ice caps outside the ice sheets in Greenland and Antarctica during 1961–2004, caused by changes in temperature and precipitation, is estimated to be 0.58±0.34 mm a–1. The mountain glaciers and ice caps around Antarctica alone contribute almost 40% of the global estimate, and hence their contribution is considerably larger than previously assumed.
|
|
| 2. |
- Ekman, Mattias, 1974-
(författare)
-
Den globala rättviserörelsen i svenska medier : Hegemoniska formationer i relationen mellan journalistik och kapitalism
- 2011
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The mobilisations against global summits towards the end of the last millennium, and the creation of the World Social Forum (WSF) in 2001, made an emerging global network of social movements visible. This thesis analyses media representations of the global justice movement, with the intention of exploring the relation between journalism and hegemonic formations in the capitalist system. The analysis includes representations of social mobilisations against global summits between 1999 and 2007, and the WSF between 2001 and 2007, in all Swedish daily newspapers. The analysis draws on theories of journalism as a social institution, and Gramsci’s concept of hegemonic formations.Using critical discourse analysis (CDA), the dissertation reveals that the representation of protests subordinates political aspects to violence, and that discursive violence presupposes physical violence. The protests are generally defined from of a hegemonic position of the political, but sometimes protest emerges in relation to legitimate political departure points. Simultaneously it is also downplayed as anti-political. The representation of WSF is more heterogeneous. It is portrayed as: an alternative, an anti-movement, and a carnival. Some aspects of violence are also highlighted through the presence of absent violence. The representations both reproduce a hegemonic order, and in some cases highlight hegemonic struggle.The thesis concludes that the global justice movement actualizes relations between dominance and resistance in the global system, but that the distance between the social mobilization and the Swedish context, transforms the protests and the WSF to temporary and partly isolated events. The historical continuity in the relations between social mobilization and news journalism shows that social movements cannot rely upon conventional news coverage.
|
|
