Temperatures measured at Gale Crater higher than expected

[ScienceRocks]

Temperatures measured at Gale Crater higher than expected
September 28, 2012

In this image, the spacecraft specialist's hands are just below one of the REMS mini-booms. The other mini-boom extends to the left a little farther up the mast. The image was taken during installation of the instrument in September 2011, inside a clean room at NASA's Jet Propulsion Laboratory, Pasadena, Calif. REMS also includes an ultraviolet-light sensor on the rover deck and, inside the body of the rover, an air-pressure sensor and the instrument's data recorder and electronic controls. Credit: NASA/JPL-Caltech

(Phys.org)—Preliminary weather reports from the Curiosity's Remote Environment Monitoring Station (REMS) are showing some surprisingly mild temperatures during the day. Average daytime air temperatures have reached a peak of 6 degrees Celsius at 2pm local time. A Martian day – known as a Sol – is slightly longer than Earths at 24 hours and 39 minutes. Temperatures have risen above freezing during the day for more than half of the Martian Sols since REMS started recording data. Because Mars's atmosphere is much thinner than Earth's and its surface much drier, the effects of solar heating are much more pronounced. At night the air temperatures sink drastically, reaching a minimum of -70 degrees just before dawn.

NASA's Mars Science Laboratory touched down in Gale Crater on 5th August 2012 close to the equator of Mars at a latitude of 4.5 degrees south. The southern hemisphere of Mars is approaching springtime, leading to speculation about possible temperatures for at the height of Martian summer. "That we are seeing temperatures this warm already during the day is a surprise and very interesting," says Dr Felipe Gómez of the Centro de Astrobiología in Madrid. "It's very early days and we are only now being able to test our models against REMS observations. If this warm trend carries on into summer, we might even be able to foresee temperatures in the 20s – and that would be really exciting from a habitability point of view. In the daytimes, we could see temperatures high enough for liquid water on a regular basis. But it's too soon to tell whether that will happen or whether these warm temperatures are just a blip."

REMS pressure sensors have also been recording slightly higher pressures than expected. In winter, Mars becomes cold enough for carbon dioxide at the poles to freeze, forming seasonal ice caps. Since carbon dioxide makes up most of the atmosphere, this process causes the overall atmospheric pressure to vary through the year. Models and data from previous mission predicted that Curiosity would land around the minimum mean pressure for the year. So far, the pressure measurements from REMS do indeed appear to be rising slowly. The pressure has risen from a daily average of around 730 pascals during the first three weeks after landing to around 750 pascals – a tiny fraction of the average pressure at sea level on Earth.

Read more at: Temperatures measured at Gale Crater higher than expected

During the day near the equator might not be as hostile as we once thought. That's good.

 

[flacaltenn]

Holy Smokes. Global warming on Mars...... A whole new venue for fights over CO2 and martian pollution.

 

[ScienceRocks]

Holy Smokes. Global warming on Mars...... A whole new venue for fights over CO2 and martian pollution.

Global warming would be a good thing for mars!

 

[ScienceRocks]

Maybe we can genetically modify some bacteria to grow near the equator of mars. That way we can start terra-forming.