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Post  tongqu Tue Dec 21, 2010 2:30 am

Radar data from the European satellite powerful laser pen has been used to make a map of ocean powerful green lasercirculation across the Arctic basin.
Cryosat's primary mission is to measure power laser pointer sea-ice thickness, which has been in sharp powerful green lasers decline in recent decades.
But its ability also to map the shape mini laser pointer of the sea surface will tell scientists if Arctic currents are changing as a result of winds DISCOUNT ELECTRONICS being allowed to blow ELECTRONICS WHOLESALERS more easily on ice-free waters.

"Nobody really knows how the532nm green laser Arctic is going to behave as the ice retreats, but we do anticipate that significant changes will 50MW green laser occur," said Dr Seymour Laxon, a Cryosat science LASER POINTER team member from500mw green laser University College London, UK.
Dr Laxon presented the first Cryosat result in San Francisco LASER BEAM at the American Geophysical Union (AGU) Fall Meeting, the LASER PEN world's largest annual gathering of Earth and planetary GREEN LASER scientists.
The European Space Agency (Esa) satellite was launched in April.
It carries one of the highest resolution synthetic CHEAP ELECTRONICS aperture radars ever put in orbit.
The instrument sends BUY LASER down pulses of microwave energy which bounce off both the top30mw laser pointer of the Arctic sea-ice and the water in the BUY WHOLESALE cracks, or leads, which separate the floes.
By measuring the difference in height BUY ELECTRONICS between these two surfaces, scientists will be able, using a relatively BLUE LASER simple calculation, to work 30mw green laser out the overall volume BURNING LASER of the marine ice cover in the far north.
But in sensing the300mw laser pointer surface of the water, Cryosat 300mw green laser becomes a powerful tool also to study ocean behaviour.

And the opening months of o250mw laser pointer bservations have enabled the Cryosat team to build a unique map 250mw green laser from just the radar echoes bouncing off leads.
This map, displayed at the 20mw green laser top of the page, describes 10mw green laser what researchers call ocean dynamic topography.
It is the height in metres of the water 200mw laser pointer surface above 150mw green laser the gravitational level in the150mw laser pointer Arctic.
Simply put, it shows where water is200mw green laser piled up, and it is water's desire always to "run down Wholesalers hill" that is a major10mw laser pointer feature underpinning the direction and speed of currents.

"What we've revealed Wholesale is the first complete 100mw laser pointer picture of ocean dynamic topography in the Arctic Ocean. All missions 100mw red laser previously have had large holes in the middle of their Arctic data100MW LASER because of their orbits, even the American Icesat satellite which did a 100mw blue laser pretty good job of getting dynamic topography - 532NM LASER t only WHOLESALE ELECTRONIC went up to 86 degrees RED LASER orth. Cryosat goes up to 88 degrees North."
'Spin up'
In the Northern Hemisphere, ocean currents move red laser pen clockwise around highs in topography and anti-clockwise red beam laser around the lows.

Clearly evident therefore in this wholesale red laser map (strong red blob) is the Beaufort Gyre, the great clockwise rotation of water that wholesale laser pointer shifts sea-ice around the Arctic.
Also visible are the topographic wholesale green laser features related to the Transpolar Drift, which routinely moves sea-ice across the Arctic from the Russian side of the basin; and the East Greenland Current that carries wholesale blue laser much of the ice that gets exported towards the Atlantic.
The Cryosat team stresses that the map red light laser is built from early data and is only a first, static snapshot.
Over the course of the mission, however red laser pointer, this data-set will be improved and provide telling evidence of any changes in Arctic Ocean circulation.
The region has witnessed a dramatic retreat of Arctic sea-ice in summer months, far ahead of what the majority of climate computer models had forecast.

tongqu

Posts : 180
Join date : 2010-11-12

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