Voda u atmosferi marsa

[Diabolique]

Mars Express was able to accomplish what so many other spacecraft have tried and failed by using a SPICAM(2) spectrometer

The search for water on Mars has been ongoing for quite some time now, with Mars rovers like NASA's Spirit and Opportunity being two examples of those who have found clues that point to a once-tropical past on the dusty red planet billions of years ago.

Now, the European Space Agency's Mars Express spacecraft has discovered that Mars' atmosphere holds water vapor in a supersaturated state.

Mars Express was able to accomplish what so many other spacecraft have tried and failed by using a SPICAM(2) spectrometer. While other spacecraft have used tools that concentrate only on surface data, which only analyzes the horizontal component of the Martian atmosphere, SPICAM(2) utilizes solar occultation to observe the vertical component of the atmosphere, which is critical for understanding Mars' hydrological cycle. Solar occultation studies light from the Sun in Martian atmosphere during sunrise and sunset.

Supersaturation is the vapor of a compound that has a higher pressure than the vapor pressure of that compound. Earth's atmosphere is considered saturated because water vapor condenses when the temperature drops below dew point, and the atmosphere cannot contain any more moisture at that point. This excess water turns into a liquid around dust and particles that are suspended, causing precipitation, but sometimes the low availability of dust and particles can slow condensation and leave excess water vapor in its gaseous state. This is supersaturation.

As it turns out, supersaturation is common on Mars. In fact, Mars Express found that the levels of supersaturation on Mars were 10 times higher than those on Earth.

"This ability of water vapor to exist in a highly supersaturated state would, for example, allow to supply the southern hemisphere of Mars with water, far more efficiently than models currently predict," said Franck Montmessin, a researcher at the Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS, CNRS / UPMC / UVSQ).

This research could contribute to the overall understanding of the planet's low amount of water today as opposed to its abundance of water billions of years ago.

This study was published in Science.

Izvor: DailyTech

 

[peja81]

Wow! Vrlo značajno otkriće.

 

[voodoons]

pa cim ima leda, tu je i voda.. mene zanima sta ima ispod leda

 

[Никола]

^O kom ledu govoriš? Ja sam razumeo da su našli neku paru.

 

[Rapture]

@voodoons
Sladoled, samo treba neko da ode gore i da lizne!

 

[voodoons]

jedan pol je u ledu skroz.. o tom ledu govorim... pa isparilo malo leda i eto vode u atmosferi... sunce bacilo malo jace svetlo tih dana :p

 

[Никола]

^Ladno nisam znao da su našli led na Marsu. Sad bi stavio nekog smajlija za blam al nema

 

[peja81]

http://geology.com/nasa/mars-crust-upper-mantle.shtml

 

[voodoons]

odavno se zna za led na polarnoj kapi... idi, stidi se malo

 

[Никола]

http://geology.com/nasa/mars-crust-upper-mantle.shtml

Hvala za sajt.

odavno se zna za led na polarnoj kapi... idi, stidi se malo

Malo sam gledao, zna se od šezdes neke da ima suvi led, ali tek 2001. se počelo pretpostavljati da ima vodenog leda ispod tog suvog. A 2008. je bukvalno nađen vodeni led. Svejedno treba da se stidim. :blam:

 

[Bogdan901]

Sta led, zna se da ima i bakterija, anaerobnih... drugih zivih bica nema sanse da ima, klima je presurova.

 

[Никола]

Sta led, zna se da ima i bakterija, anaerobnih... drugih zivih bica nema sanse da ima, klima je presurova.

:blam: :blam: :blam:

 

[voodoons]

:facepalm::bezim::boli::ajoj:

 

[FantomX]

:faceblam:

 

[Villy]

Really??!

Sta led, zna se da ima i bakterija, anaerobnih... drugih zivih bica nema sanse da ima, klima je presurova.

o_O?!

 

[voodoons]

kontaju da ispod polarnog leda ima gomila ekstremofila, zivih bica koja podnose ekstremne uslove za zivot..

 

[peja81]

Što je za sada samo čista spekulacija, ali ko zna ...

 

[Bogdan901]

Spekulacija se zasniva na meteoritu koji je sa sobom doneo fosilizovane bakterije, kada je bucnuo u atlantik pre 13000 godina... sada je samo pitanje vremena kada ce se potvrditi to nekim svezim uzorkom sa polarnih kapa.

 

[peja81]

Na ovo misliš?

Spojler

Koliko znam, dokazali su da to nije fosil.

 

[Bogdan901]

Mozda, ne secam se slike. A koliko ja znam dokazali su da nije sa Zemlje, jer je neko napao teoriju da se slicna fosilizacija moze naci i na zemlji, sto je potvrdjeno u laboratoriji ubrzanim starenjem, ali postoje druga nepoklapanja, pa je ostalo na tome da su bakterije ipak sa Marsa. Nije mi poznato da je dokazano da nije fosil.

 

[Никола]

Na ovo misliš?

Spojler

Koliko znam, dokazali su da to nije fosil.

Ta slika je iz 1996. sećam se i ja toga iz dokumentarca. 2009-te su uz pomoć novog mikroskopa utvrdili da skoro sigurno ima fosila bakterija.
http://www.foxnews.com/scitech/2009/11/30/fossilized-bacteria-point-life-mars/