Professor Dr. Roberto Bargagli (auth.)'s Antarctic Ecosystems: Environmental Contamination, Climate PDF

By Professor Dr. Roberto Bargagli (auth.)

ISBN-10: 3540220917

ISBN-13: 9783540220916

ISBN-10: 3540264655

ISBN-13: 9783540264651

Choice extraordinary name! (January 2006)

The snapshot of Antarctica as a logo of the final nice desert and pristine surroundings has replaced significantly within the final 20 years. Environmental difficulties comparable to the ozone gap and the break-up of ice-shelves have proven that Antarctica is inextricably associated with international methods and uncovered to the effect of human actions within the remainder of the area. This quantity offers an summary of weather switch information, its results at the constitution and functioning of Antarctic ecosystems, and the prevalence and biking of continual contaminants. It discusses the original physico-chemical features of the Antarctic surroundings, ecophysiological variations of terrestrial and marine organisms, the move of contaminants in pelagic and neritic foodstuff chains and the potential outcomes for animals at greater trophic degrees. The textual content concludes with attainable destiny situations of weather swap and atmospheric infection and the function of Antarctic organisms within the early detection of environmental perturbations.

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Additional resources for Antarctic Ecosystems: Environmental Contamination, Climate Change, and Human Impact

Example text

Diamond dust”). Clear-sky precipitation is very common; it originates from a cloud of ice crystals, too thin to be seen either from the ground or in satellite imagery. It obviously determines a very low accumulation rate. It is important to understand the distribution of atmospheric precipitation and snowfall over the continent in order to evaluate the mass balance of snow deposition and possible global sea-level variations, to study past climates through the analysis of ice cores, and to estimate the deposition rate of persistent airborne pollutants.

6. Annual mean surface temperature (°C) in Antarctica that of the east coast, at the same latitude. In fact, the latter zone is more affected by southerly winds and the greater extent of sea ice. A remarkable feature of temperature regimes in Antarctica is the inversion of surface temperatures due to strong radiational cooling over snow and ice surfaces. The strongest inversions occur on the plateau during winter, but significant inversions may also occur in coastal regions throughout most of the year (Phillpot 1985).

Thus, in the global energy budget, the radiational losses of Antarctica play a very important role in determining the poleward flow of warm air masses from tropical regions. Although for decades the duration of bright sunshine in Antarctic stations has been the most widespread radiation measurement for climatological purposes, the springtime depletion of stratospheric ozone over Antarctica discovered in the 1980s (Farman et al. 1985) prompted interest in ground-level measurements of ultraviolet (UV) radiation, which is expected to adversely affect the polar biosphere.

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Antarctic Ecosystems: Environmental Contamination, Climate Change, and Human Impact by Professor Dr. Roberto Bargagli (auth.)

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