IndexCalendarMAN/FAQSoekLedelysGebruikersgroepeRegistreerTeken in
Neem asb kennis dat hiermee dit amptelik aangekondig word dat die KVB Forum sal skuif, gaan na die kaapsevryheidsburgers.org blad en volg die Forum skakel
Latest topics
» BYMEKAARKOM DAG
Sat Sep 25, 2010 4:28 pm by findmy012

» WAARSKUWINGS VLAKKE TOV SEKURITEITS STATUS
Sat Sep 25, 2010 4:27 pm by findmy012

» VROU IN HUIS VERWURG DEUR SWART ROWERS
Sat Sep 25, 2010 4:27 pm by findmy012

» FORUM WILL BE CLOSING!!!!!!
Sun Sep 05, 2010 9:38 pm by KVB000000002

» ANC GEORGANISEERDE MISDAAD SINDIKAAT IN BLOU TERREUR UNIFORMS
Tue Aug 24, 2010 9:02 pm by KVB000000002

» AND RATCONTROL
Tue Aug 24, 2010 8:58 pm by KVB000000002

» N DAG IN DIE LEWE VAN N BLANKE INWONER IN N WIT PLAKKERSKAMP
Thu Aug 19, 2010 10:38 pm by KVB000021133

» STAKENDE BOBBEJAANTROP OPPAD OM LAND SE EKONOMIE TE KELDER
Tue Aug 17, 2010 11:12 pm by KVB000000002

» WAAR IS DIE POSTE?
Tue Aug 17, 2010 10:50 pm by KVB000000002

Top posters
KVB000000002
 
KVB000000001
 
KVB000000005
 
KVB000021142
 
KVB000021126
 
KVB000021133
 
Arend
 
Admin
 
Ridder Van Die Langpad
 
KVB000021107
 
Wie is Aanlyn
Daar is slegs 1 gebruiker aanlyn :: 0 Geregistreerd, 0 Versteek en 1 Gas

Geen

Meeste gebruikers ooit aanlyn was 48 op Sat Apr 23, 2011 6:16 am
Statistics
Ons het 175 geregistreerde gebruikers
Die nuutste geregistreerde gebruiker is GK63

Ons gebruikers het altesaam 3166 artikels geplaas in 1809 subjects
SA Topsites
SA Topsites
::

Share | 
 

 Worries over climate satellite

Besigtig vorige onderwerp Besigtig volgende onderwerp Go down 
SkrywerBoodskap
KVB000000005



Aantal posstukke : 295
Join date : 2010-02-07

PosOnderwerp: Worries over climate satellite   Wed Apr 07, 2010 11:03 am

Worries over climate satellite
2010-04-07 10:22

Related Links
Solo balloon attempt over pole
Desert spreading like cancer
Ice age trigger found

Paris - After losing one satellite and postponing the launch of its replacement, European scientists hope on Thursday will yield good news in their quest to get a revolutionary climate monitor into orbit.

Their watchdog is the 700kg CryoSat-2, the most powerful satellite ever built for measuring the thickness of Earth's ice sheets.

For climate physicists, ice cover is like a canary in the 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 freshwater is locked up.

Frustration

Even a small melt from these mighty frozen reservoirs could drive up sea levels sufficiently to drown many coastal cities and deltas.

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 1cm.

Scientists have gnashed their teeth in frustration over the years lost between since CryoSat's conception and launch from Russia's Baikonur Cosmodrome in Kazakhstan.

"In the period between proposing CryoSat in 1999, the Arctic ice decline has become a fact, rather than a prediction," said Duncan Wingham, a British scientist who is the project's lead investigator.

"On the other hand, the ice decline is more rapid than any model prediction. Clearly we need to understand in much greater detail the behaviour of the ice."

In addition, the decline in the ice opens the Arctic Ocean to the action of the winds.

That means surface currents may alter, boosting the possible effects on the North Atlantic, said Wingham, a professor of earth sciences at University College London.

Worries

The first CryoSat was destroyed in a second-stage launch failure in October 2005 that used a modified Russian SS-19 intercontinental ballistic missile (ICBM).

Its replacement also uses a converted ICBM, a three-stage derivation of an SS-18 called the Dnepr.

The replica's launch had been originally set for February 25, but was postponed because of worries - since discounted - that the second-stage engine's fuel reserve was insufficient.

Launch teams on Tuesday carried out a successful eight-hour dress rehearsal, the European Space Agency (ESA) said in a press release.

CryoSat-2 will be the third of ESA's "Earth Explorer" satellites.

The others are Goce, launched in March 2009 to monitor ocean circulation, and SMOS, launched in November 2009 to monitor soil moisture and ocean salinity.

Liftoff on Thursday is scheduled for 13:57 GMT.

- AFP

Add your view to this conversation - comment below

Read more on: climate change | esa
http://www.news24.com/Content/SciTech/News/1132/f5c8e9b1e6d24a09b63a3e00ad3eb5d7/07-04-2010-10-22/Worries_over_climate_satellite
Terug na bo Go down
Sien gebruiker's profiel
 
Worries over climate satellite
Besigtig vorige onderwerp Besigtig volgende onderwerp Terug na bo 
Bladsy 1 van 1

Permissions in this forum:Jy mag nie onderwerpe in hierdie forum beantwoord nie.
 :: News from abroad-
Spring na: