Telstra has revealed the addition of almost one million new mobile services in the six months to December 2011, but Sensis revenues plummeted 24 percent in 12 months.
A study published by a team of scientists in the
journal Geophysical Reseach Letters, published by the the American
Geophysical Union, compared models used to predict sea ice decline used
by the Intergovernmental Panel on Climate Change’s (IPCC) for more than
50 years and compared them to actual observations. The observations
show ice declining faster than the models.
"From 1953 to 2006, Arctic sea ice extent at the end of the melt season
in September has declined sharply. Though all models used in the
Intergovernmental Panel on Climate Change’s (IPCC) Fourth Assessment Report show
declining Arctic ice cover over the observational record, none of the
models individually shows trends comparable to observations during this time period," the report states.
The inescapable conclusion is that Arctic sea ice may be gone far sooner than the IPCC models predict.
"Given that as a group, the models still underestimate observed ice
loss, the authors expect that the externally forced component of Artic
sea ice decline may be larger. This suggests that the Arctic could be seasonally free
of sea ice earlier than the IPCC projections, which range from 2050 to
well beyond 2100," an extract of the report states.
According to a report in National Geographic, researcher Julienne
Stroeve, lead author of the study, believes that actual Arctic sea ice
melt is about 30 years ahead of what the predictive models show. Thus, by the end of the
next decade, summers in the Arctic could be completely free of sea
ice.
David Bass
| For the fourth year in a row, IDC has placed content security provider Websense (NASDAQ: WBSN) at the top of the IDC Worldwide Web Security 2011 –…
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