Newsgroup: it.sport.montagna
Titolo: L'Antartide sta diventando più freddo?

In relazione anche al post che parla che del fatto che Alpi e Himalaya
stanno morendo, vi propongo un altro link che smentisce altre tesi di
presunti ambientalisti che sanno tutto del clima e dell'effetto serra.
Quando invece ancora se ne sa veramente poco (almeno a livello
planetario).
http://www.meteogiornale.it/read.php?id=1406
Lorenzo

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Per coloro ai quali puo' interessare:
EU PROJECT SHOWS ANTARCTICA TEMPERATURE RISE IN LAST 170,000 YEARS
Recent data obtained by a team of 22 scientists working on the EU
project EPICA (European project for ice boring in Antarctica) has
shown that the Antarctic is 10 degrees Celsius warmer than 170,000
years ago. Project participant Roland Souchez told CORDIS News that
these results cannot, however, be compared with recent US research
claiming that the Antarctica is getting colder. 
The scientists are involved in a seven year project to determine the
history of the Earth's climate and atmosphere, or to 'reconstruct the
climate of the past,' in the words of Roland Souchez from the Free
University of Brussels. The team is using the climate record obtained
from ice to investigate the relationship between the chemistry of the
atmosphere and climate changes over the past 500,000 years,
particularly the effects of carbon dioxide, methane and nitrous
oxides. The results will be used to test and enhance computer models
used to predict the climate in the future. 
Early in January the team drilled through 2002 metres of ice at Dome
Concordia, high on East Antarctica's plateau. A specially created
laboratory on the ice allowed scientists to analyse past climate
shifts within hours of the drilling, instead of sending samples back
to laboratories in Europe and waiting for results. Proof of a rise in
the region's temperature comes from the ice 2002 metres below the
surface, which the scientists say came from snow that fell 170,000
years ago. 
'The Antarctic ice sheet is like a history book of the Earth's
climate. This drilling programme takes us back to the future.
Information about how climate worked in the past is locked in the ice.
Understanding this helps predict future changes. It's fascinating to
think that 170,000 years ago global sea level was 120 metres lower
than now and the temperature at the equator was six degrees Celsius
colder,' says Dr Eric Wolff of the British Antarctic Survey and
current chief scientists for EPICA at the Antarctic site. 
A team of US scientists have meanwhile claimed that the Antarctica is
cooling, saying that the average air temperature at the Earth's
surface has increased by 0.06 degrees Celsius per decade during the
20th century, and by 0.19 degrees Celsius per decade from 1979 to
1998. However, Mr Souchez told CORDIS News that this research couldn't
be compared with the EPICA project, as the research teams are using a
different timescale. 'It is difficult to go from one timescale to
another - [the EPICA timescale] in my opinion is more important for
the human race,' Mr Souchez told CORDIS News. 
EPICA involves 13 partners from ten European countries: Belgium,
Denmark, France, Germany, Italy, Netherlands, Norway, Sweden,
Switzerland and the UK. It is coordinated by the European science
foundation (ESF) and funded by the EU under the Fifth Framework
programme's Energy, environment and sustainable development programme
and the countries involved. The total budget for the seven year
project is 7.06 million euro, 2.41 million of which is being provided
by the European Commission. 
The research team will complete this season's drilling at Dome
Concordia at the end of January, after which ice cores will be sent to
over 30 European laboratories for more detailed study. The team will
return next year to drill to the bottom of the ice. 
January 2002 also sees the start of drilling at Dronning Maud Land,
one of the least explored regions of Antarctica and on the opposite
side of the continent to Dome Concordia. This site receives double the
snowfall of Dome Concordia, thus enabling scientists to obtain even
more detailed information, although it will not reach so far back in
time.
Source: CORDIS News interview, British Antarctic Survey and press
sources via Cordis 

Tutto questo è molto interessante, ma come anche sottolinea il testo si
sta parlando di
ricerche che riguardano due scale temporali molto diverse e non è
semplice fare un
confronto e tantomeno valutare se c'è contraddizione o meno. Dubito,
anche, in effetti che
tutto questo abbia un rapporto diretto con il riscaldamento globale di
cui si parla di questi
tempi.
	Stefano
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