Tag Archives: atmosphere

THEMIS: Clouds

THEMIS Image of the Day, November 26, 2014. Clouds fill half of this unnamed crater located in the region between Malea Planum and Hellas Planitia. More THEMIS Images of the Day by geological topic.

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MARCI weather report: November 10-16, 2014

Storm activity was relatively calm last week, with sporadic dust-lifting events occurring off the seasonal south polar cap edge in Sirenum, Noachis, and Cimmeria. Diffuse water ice clouds comprising the north polar hood were visible over the northern plains, and … Continue reading

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Early Mars warmth, flowing water: episodic only

How to reconcile indisputable evidence of flowing water on Mars with severely low temperatures? New research shows volcanism and greenhouse gas could have warmed the planet sufficiently, but only for tens or hundreds of years at a time. Ample evidence … Continue reading

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Mars, like Earth, has macroweather

Weather, which changes day-to-day due to constant fluctuations in the atmosphere, and climate, which varies over decades, are familiar. More recently, a third regime, called “macroweather,” has been used to describe the relatively stable regime between weather and climate. A … Continue reading

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MARCI weather report: November 3-9, 2014

This past week, dust-lifting was relatively infrequent compared to recent weeks, with local storms observed along the seasonal south polar cap edge in Sirenum and in Noachis south of Argyre and Hellas. The seasonal cap edge was still bright and … Continue reading

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MARCI weather report: Oct 27-Nov 2, 2014

This week we observed the fallout from last week’s breakout of regional storms across much of the planet. Early in the week there was still some dust-lifting in Hellas, Noachis, and Argyre, but activity in those areas largely diminished by … Continue reading

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MARCI weather report, October 20-26, 2014

This past week extensive dust-lifting in numerous areas of the planet contributed to expansive regional scale storms and dust mobilization. Early in the week several storms formed along the Acidalia storm-track, crossing the equator and moving into central Noachis… [More … Continue reading

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Opportunity: Dusty days at Endeavour

Sol 3820, October 22, 2014. Dust in the air turns sunlight hazy over Endeavour Crater.  This afternoon view (3:30 p.m. local time) looks northeast, down Wdowiak Ridge. The crater’s far rim, 22 kilometers away, is difficult to distinguish from the … Continue reading

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MARCI weather report: October 13-19, 2014

This week Mars experienced an uptick in regional storm activity, with widespread dust-lifting observed in both hemispheres. Storms travelled down the Acidalia storm-track throughout the week, passing through Chryse into eastern Valles Marineris, and contributing dust-haze past the equator into … Continue reading

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MARCI weather report: October 6-12, 2014

Storm activity continued in earnest this week, with regional scale storms in the northern hemisphere and smaller local storms in the southern hemisphere. In the north, storm activity along the Acidalia storm track picked up, with storms travelling north to … Continue reading

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