climate variability and change in high elevation regions past present future advances in global change research

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Climate Variability And Change In High Elevation Regions Past Present Future

Author : Henry F. Diaz
ISBN : 9789401512527
Genre : Science
File Size : 45. 92 MB
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Glaciers in the Andes are particularly important natural archives of present and past climatic and environmental changes, in significant part because of the N-S trend of this topographic barrier and its influence on the atmospheric circulation of the southern hemisphere. Strong gradients in the seasonality and amount of precipitation exist between the equator and 30° S. Large differences in amount east and west of the Andean divide also occur, as well as a change from tropical summer precipitation (additionally modified by the seasonal shift of the circulation belts) to winter precipitation in the west wind belt (e. g. , Yuille, 1999; Garraud and Aceituno, 2001). The so-called 'dry axis' lies between the tropical and extra tropical precipitation regimes (Figure 1). The high mountain desert within this axis responds most sensitively to the smallest changes in effective moisture. An important hydro-meteorological feature on a seasonal to inter-annual time-scale is the occurrence of EN SO events, which strongly control the mass balance of glaciers in this area (e. g. , Wagnon et ai. , 2001; Francou et ai. , in press). The precipitation pattern is an important factor for the interpretation of climatic and environmental records extracted from ice cores, because much of this information is related to conditions at the actual time of precipitation, and this is especially so for stable isotope records. Several ice cores have recently been drilled to bedrock in this area. From Huascanin (Thompson et ai. , 1995), Sajama (Thompson et ai.

Past Climate Variability In South America And Surrounding Regions

Author : Francoise Vimeux
ISBN : 904812672X
Genre : Science
File Size : 51. 36 MB
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South America is a unique place where a number of past climate archives are ava- able from tropical to high latitude regions. It thus offers a unique opportunity to explore past climate variability along a latitudinal transect from the Equator to Polar regions and to study climate teleconnections. Most climate records from tropical and subtropical South America for the past 20,000 years have been interpreted as local responses to shift in the mean position and intensity of the InterTropical Conv- gence Zone due to tropical and extratropical forcings or to changes in the South American Summer Monsoon. Further South, the role of the Southern Hemisphere westerly winds on global climate has been highly investigated with both paleodata and coupled climate models. However the regional response over South America during the last 20,000 years is much more variable from place to place than pre- ously thought. The factors that govern the spatial patterns of variability on millennial scale resolution are still to be understood. The question of past natural rates and ranges of climate conditions over South America is therefore of special relevance in this context since today millions of people live under climates where any changes in monsoon rainfall can lead to catastrophic consequences.

Global Change And Mountain Regions

Author : Uli M. Huber
ISBN : 1402035063
Genre : Nature
File Size : 66. 94 MB
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Enviroment, mountain biodiversity, ecological changes.

Climate Variability And Extremes During The Past 100 Years

Author : Stefan Brönnimann
ISBN : 1402067666
Genre : Science
File Size : 66. 3 MB
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This volume provides an up to date overview of climate variability during the 20th century in the context of natural and anthropogenic variability. It compiles a number of contributions to a workshop held in Gwatt, Switzerland, in July 2006 dealing with different aspects of climate change, variability, and extremes during the past 100 years. The individual contributions cover a broad range of topics. The volume fills a gap in this exciting field of research.

Arctic Antarctic And Alpine Research

Author :
ISBN : STANFORD:36105123116845
Genre : Alpine regions
File Size : 47. 3 MB
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Enso Signal Network Newsletter

Author :
ISBN : UCSD:31822009530940
Genre : Climatic changes
File Size : 24. 37 MB
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Klima Nderung Und M Gliche Langfristige Auswirkungen Auf Die Vegetation Der Schweiz

Author : Felix Kienast
ISBN : 3728124842
Genre :
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Mit dt., franz., ital. und engl. Zusammenfass.

Bibliography On Cold Regions Science And Technology

Author :
ISBN : UIUC:30112050443578
Genre : Cold regions
File Size : 66. 33 MB
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The Oxford Companion To Global Change

Author : David Cuff
ISBN : UCSC:32106019816211
Genre : Science
File Size : 45. 19 MB
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In recent years, global change has become increasingly important in technological, ecological and political spheres. This companion examines the environmental events of recent times, and investigates long-term trends as well as broader issues of global change.

Journal Forestier Suisse

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ISBN : MINN:31951P00748393T
Genre : Forests and forestry
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