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Université de Fribourg

North Atlantic sea-floor spreading rates: implications for the Tertiary development of inversion structures of the Norwegian–Greenland Sea

Mosar, Jon ; Lewis, Gavin ; Torsvik, Trond H.

In: Journal of the Geological Society, 2002, vol. 159(5), p. 503

Tertiary development of the Norwegian continental margin was dominated by the opening of the Arctic–North Atlantic Ocean. The correct identification of magnetic anomalies and their ages and the analysis of spreading rates during the formation of this ocean are important in understanding the development of the region and specifically the history of its passive margins. Three ocean domains, the...

Université de Fribourg

Palaeotectonic and palaeogeographic evolution of the western Tethys and PeriTethyan domain (IGCP Project 369)

Stampfli, G. M. ; Borel, G. D. ; Cavazza, W. ; Mosar, Jon ; Ziegler, P. A.

In: Episodes, 2001, vol. 24(4), p. 222

Project No. 369 ("Comparative Evolution of PeriTethyan Rift Basins") of the International Geological Correlation Program produced a new palaeotectonic-palaeogeographic atlas of the western PeriTethyan domain. The atlas contains more than two hundred new maps and documents grouped in nine regional sets (Iberia, Polish Trough, Eastern European and Scythian Platforms, Moesian Platform, Levant,...

Université de Fribourg

Present-day and future tectonic underplating in the western Swiss Alps: reconciliation of basement / wrench-faulting and décollement folding of the Jura and Molasse basin in the Alpine foreland

Mosar, Jon

In: Earth and Planetary Science Letters, 1999, vol. 173(3), p. 143

The western Alps form a geodynamically active mountain belt showing the typical features of an evolving orogenic wedge with its pro-wedge geometry to the NNW and its retro-wedge structures to the SSE. Renewed tectonic underplating of European continental crust occurred after the orogenic wedge underwent major dynamic disequilibrium following the break-off of the southward subducting slab of the...

Université de Fribourg

Evidence of response of vegetation to environmental change on high-elevation sites in the Swiss Alps

Keller, Franciska ; Kienast, F. ; Bensiton, Martin

In: Regional Environmental Change, 2000, vol. 1(2), p. 70

Climate change has in the past led to shifts in vegetation patterns; in a future, warmer climate due to enhanced greenhouse-gas concentrations, vegetation is also likely to be highly responsive to such warming. Mountain regions are considered to be particularly sensitive to such changes. In this paper we present an approach to assess the impact of climate change on long-term vegetation plots at...

Université de Fribourg

Numerical investigation of an extreme storm with the Canadian Regional Climate Model: the case study of windstorm VIVIAN, Switzerland, February 27, 1990

Goyette, Stéphane ; Beniston, Martin ; Caya, D. ; Laprise, R. ; Jungo, Patricia

In: Climate Dynamics, 2001, vol. 18(1-2), p. 145

The windstorm VIVIAN that severely affected Switzerland in February 1990 has been investigated using the Canadian Regional Climate Model (CRCM). This winter storm was characterised by a deep cyclone in the North Atlantic and by strong geopotential and baroclinic north-south gradients in the troposphere over Western Europe resulting in high windspeeds in Switzerland. Our principal emphasis is to...

Université de Fribourg

Daily wind gust speed probabilities over Switzerland according to three types of synoptic circulation

Jungo, Patricia ; Goyette, Stéphane ; Beniston, Martin

In: International Journal of Climatology, 2002, vol. 22(4), p. 485

The nowcasting and prediction of strong winds are still far from adequate, using either statistical or numerical modelling approaches. During the last decade, Switzerland has been struck by two extratropical storms, namely the February 1990 storm Vivian, and the December 1999 storm Lothar, that caused severe damage to infrastructure and to forests. Although numerical weather prediction models...

Université de Fribourg

Shifts in the distributions of pressure, temperature and moisture and changes in the typical weather patterns in the Alpine region in response to the behavior of the North Atlantic Oscillation

Beniston, Martin ; Jungo, Patricia

In: Theoretical and Applied Climatology, 2002, vol. 71(1-2), p. 29

An investigation has been undertaken to assess the manner in which the North Atlantic Oscillation (NAO) influences average, climatic conditions, and also extremes of dynamic and thermodynamic variables. By choosing representative sites in the Swiss Alps, the present study shows that there is a high sensitivity of the extremes of the probability density functions of temperature, moisture and...

Université de Fribourg

Climate modeling at various spatial and temporal scales: where can dendrochronology help ?

Beniston, Martin

In: Dendrochronologia, 2002, vol. 20 (1-2), p. 117

This paper provides a brief overview of certain issues related to climate modeling and the role that dendrochronology can play, and has already played, in this context. Modeling is an essential approach to investigating the future evolution of the climate system in response to human activities. Tree-ring chronologies, on the other hand, have the capability of providing key parameters for model...

Université de Fribourg

Climatic change: possible impacts on human health

Beniston, Martin

In: Swiss Medical Weekly, 2002, vol. 25-26, p. 329

This paper addresses a number of problems relating climatic change and human health. Following an introduction that outlines the over-arching issues, a short summary is given on climatic change and its anthropogenic causes. The rest of the paper then focuses on the direct and indirect impacts of global climatic change on health. Direct effects comprise changes in the hygrothermal stress response...