Lift off for Europe's climate satellite
A satellite to study how climate change affects Earth's icecaps finally launched into space Thursday five years after a first attempt failed, the European Space Agency (ESA) announced.
The 700-kilo (1,540 pound) CryoSat-2 module lifted off at 15:57 GMT on a Dnepr rocket from the Baikonur Cosmodrome in Kazakhstan, separating from the launcher 17 minutes later.
Its mission is to measure changes in the thickness of the vast ice sheets that overlie Antarctica and Greenland, as well as variations in the thickness of the relatively thin ice floating in the polar oceans.
CryoSat-2 replaces the original CryoSat satellite lost in 2005 during a launch failure.
For climate physicists, ice cover is like a canary in a coal mine, providing invaluable early warning of the impacts of man-made temperature rise.
Over the past decade, mounting evidence points to the loss of floating summer sea ice in the Arctic and the breakup of large banks of ice on the Antarctic peninsula as global warming has intensified.
But much remains unknown, especially the health of the Greenland and Antarctic land ice sheets, where the bulk of the planet's fresh water is locked up.
Even a small melt from these mighty frozen reservoirs could drive up sea levels sufficiently to drown many coastal cities and deltas, forcing hundreds of millions of people to higher ground.
"We know from our radar satellites that sea ice extent is diminishing, but there is still an urgent need to understand how the volume of ice is changing," said Volker Liebig, ESA's Director of Earth Observation Programmes.
"To make these calculations, scientists also need information on ice thickness."
The big tool for measuring the ice is CryoSat-2's specially-designed all-weather microwave radar altimeter, capable of detecting changes in ice thickness to within one centimetre (0.4 of an inch).
CryoSat-2 is the third so-called "Earth Explorer" satellite put into orbit by the European agency in just over a year.
The Gravity field and Ocean Circulation Explorer (GOCE) mission launched in March 2009, and the Soil Moisture and Ocean Salinity (SMOS) mission followed in November.
All three missions are designed to study the effect of human activity on Earth's natural processes.
Safely in polar orbit, the new satellite is currently in the hands of ESA's European Space Operations Centre in Darmstadt.
From the blogs
A slight deviation from style this week and admittedly a bit weird, but at least I can finally say I...
Owen Howells is a DJ/producer who grew up in Australia but was born in the UK. He came back to the U...
Justice, the bedrock of our society is for sale under the Government’s latest plan to sell legal aid...
Take inspiration from the green-fingered brigade who have been showing off their creativity at the R...
- 1 What, let gays get married? We must be bonkers
- 2 Rocky Horror star Tim Curry 'suffers major stroke'
- 3 Exclusive: How MI5 blackmails British Muslims
- 4 EDL marches on Newcastle as attacks on Muslims increase tenfold in the wake of Woolwich machete attack which killed Drummer Lee Rigby
- 5 Farewell, Shameless. Your heirs have work to do
BMF is the UK’s biggest and best loved outdoor fitness classes
Find out what The Independent's resident travel expert has to say about one of the most beautiful small cities in the world
Nook is donating eReaders to volunteers at high-need schools and participating in exclusive events throughout the campaign.
Get the latest on The Evening Standard's campaign to get London's children reading.
Win anything from gadgets to five-star holidays on our competitions and offers page.