Your feedback will go directly to Science X editors. Are you sure you want to delete this comment? It forms each morning, then disappears the same day, only to reappear the next morning. The cloud has been officially named the Arsia Mons Elongated Cloud or AMEC. Mysterious cloud forms over Arsia Mons volcano on Mars. Its size changes throughout the Martian day — in the morning it grows longer, parallel with the equator. … 15 novembre 2020. Arsia Mons sunrise cloud shadow returns? par Marie-Emmanuelle BAILLEUL. As they study this cloud more, they hope to discover why it appears and reappears only in the morning hours. The plume was spotted earlier this month above Arsia Mons in the southern hemisphere. Free for commercial use, no attribution required. More evidence against the cloud being orographic is captured by Clyde Foster's high resolution color image of Arsia Mons and of the cloud and its long shadow in the early morning at Ls 260° that is very late Spring in the Southern Hemisphere. Click here for an annotated version of this image, which is … • High altitude thin clouds are associated with the elevated dustiness. As a comparison, the cone-shaped volcano has a diameter of about 250 km; a view of the region with labels is provided here. Dynamics of the extremely elongated cloud on Mars Arsia Mons volcano. Due to the sheer scale of this comment community, we are not able to give each post the same level of attention, but we have preserved this area in the interests of open debate. These are ice rich clouds over the summit of Arsia Mons. Our journalists will try to respond by joining the threads when they can to create a true meeting of independent Premium. This is not the first time the cloud has made an appearance. The stream forms as the airflow is influenced by the side of the volcano that does not face the wind, baffling scientists. Image via ESA . This black hole resides about 54 million light-years from Earth, Pluto, as pictured by Nasa's New Horizons spacecraft as it flew over the dwarf planet for the first time ever in July 2015, A coronal mass ejection as seen by the Chandra Observatory in 2019. Die Arsia Mons Elongated Cloud (AMEC) ist eine Lee-Wolke, die über dem mehr als 20 Kilometer hohen ruhenden Vulkan Arsia Mons auf dem Mars entdeckt wurde. The white and bluish areas in the images are thin clouds of water ice. By using our site, you acknowledge that you have read and understand our Privacy Policy The content is provided for information purposes only. Cloud near Arsia Mons is outlined in red and indicated by a red arrow. Bien que le volcan Arsia Mons de Mars ne soit pas en éruption, il s’offre tout de même en spectacle actuellement. However, we don't know yet if the clouds are always quite this impressive". A martian day, or sol, is slightly longer than an Earth day at 24 hours, 39 minutes and 35 seconds long. Adam Smith @adamndsmith. Ce nuage a une structure en forme de queue, il est constitué d'eau et de glace, et peut gagner plus de 1 800 kilomètres de longueur. Thursday 30 July 2020 13:19. The cloud can grow to be up to 1800 km (1120 miles) long. See Figure 2. “The extent of this huge cloud can't be seen if your camera only has a narrow field of view, or if you're only observing in the afternoon” said Eleni Ravanis, who works with the camera equipment on the Mars Express. A plume shaped white cloud was imaged a number of times from Sep. 13, 2018 through Nov. 12, 2018 by the Mars Express. Mars’ massive cloud is back. You can unsubscribe at any time and we'll never share your details to third parties. A curious elongated cloud, extending west of the Arsia Mons volcano on Mars, seen in a Mars Express image taken October 10, 2018. Why does it only form in the early morning? It would be a dense cloud of CO2 ice crystals therefore would cast a nice shadow. It appeared first thing in the morning, built across the landscape, then drifted away from the volcano and disappeared by early afternoon. July 2020; Conference: XIV Reunión Científica de la Sociedad Española de Astronomía • Favoring atmospheric conditions exist over Arsia Mons for high altitude clouds. It has been named Arsia Mons Elongated Cloud (AMEC), but the mysteries of why it is formed, and for how long it has been appearing and disappearing, are still unknown. The MCC and MARCI images show a cloud patch over Olympus Mons within the aphelion and a thin cloud trails over Arsia Mons within the perihelion of Mars years. The southern solstice is the period of the year when the Sun is in the southernmost position in the martian skies, just like 21 December on Earth. A mysteriously long, thin cloud has again appeared over the 20-km (~12 miles / 65,000 feet) high Arsia Mons volcano on Mars.. A recurrent feature, the cloud is made up of water ice, but despite appearances, it is not a plume linked to volcanic activity.Instead, the curious stream forms as airflow is influenced by the volcano’s ‘leeward’ slope − the side that does not face the wind. Images are provided of a plume-shaped white cloud located on the Western flank of Arsia Mons during apparitions going back to 2005.Images of the plume-shaped white cloud … “We have been investigating this intriguing phenomenon and were expecting to see such a cloud form around now,” said Jorge Hernandez-Bernal of the University of the Basque Country in Spain, who is leading an ongoing study on the cloud. The southern solstice is when the Sun is in the southernmost area of the sky. However, we don’t know yet if the clouds are always quite this impressive”. The long cloud streaming out from Arsia Mons. Instead, the curious stream forms as airflow is influenced by the volcano's 'leeward' slope − the side that does not face the wind. You can also choose to be emailed when someone replies to your comment. Arsia is the southernmost of the three Tharsis Montes. Click here for an annotated version of this image. Dynamics of the extremely elongated cloud on Mars Arsia Mons volcano. This site uses cookies to assist with navigation, analyse your use of our services, and provide content from third parties. Please continue to respect all commenters and create constructive debates. Tapez votre commentaire ici. A mysteriously long, thin cloud has again appeared over the 20-km-high Arsia Mons volcano on Mars. The image covers an area about 1100 kilometers wide. A mysterious elongated cloud that stretches some 1,100 miles over Mars has returned - it was last seen in 2018. Arsia Mons is 12 miles high and 270 miles wide, dwarfing Mauna Loa, Earth’s largest volcano, which is only 6.3 miles high and 75 miles wide, and mostly underwater. At a Glance. The Mars Express science team have now named the cloud the Arsia Mons Elongated Cloud, AMEC. We study the daily cycle of this cloud, showing how the morphology and other parameters of the cloud evolved with local time. Red arrow indicates Arsia Mons. The altitude of the clouds and speed they are blown by the wind is enough that there is significant difference in cloud locations between the short delay separating the filters. Start your Independent Premium subscription today. Water ice cloud patch and trail observed over Olympus and Arsia Mons. Named the Arsia Mons Elongated Cloud (AMEC), the cloud can reach up to 1,800 km (1,118 miles) in length. Download Image of Arsia Mons Spiral Cloud. These images of the cloud, which can reach up to 1800-km in length, were taken on 17 and 19 July by the Visual Monitoring Camera (VMC) on Mars Express, which has been studying the Red Planet from orbit for the past 16 years. Nous concevons et vous aidons à réaliser les projets innovants qui changeront votre futur. 13 novembre 2020. Stay tuned as scientists continue to investigate, and we reveal more mysteries from Mars. Please be respectful when making a comment and adhere to our Community Guidelines. Your email address is used only to let the recipient know who sent the email. The other volcanoes in the Tharsis Montes region are also visible, including Olympus Mons, visible in the image on the right, almost covered in shadow. or, by European Space Agency. The strange cloud was seen in 2018 where it stretched over 1,500km of the planet’s surface in late September, before disappearing in mid-October. Image of tail-like cloud over Mars released by ESA (Source: ESA/GCP/UPV/EHU Bilbao) A weird-looking, extremely elongated white cloud is back as it has been spotted after almost two years over an extinct Martian volcano, Arsia Mons which is located just a bit south of the Martian equator. Mars Express keeps an eye on curious cloud, A better reference genome for the rhesus macaque, Speed of magnetic domain walls found to be fundamentally limited, Mountain hares in Scotland are failing to adapt to climate change, making them more vulnerable to predators, Giant pulses detected in the pulsar PSR J1047−6709, Smaller-than-average male tree crickets found to boost the sound level of their chirps using baffles, Our Beautiful Universe - Photos and Videos. "Luckily for Mars Express, the highly elliptical orbit of the spacecraft, coupled with the wide field of view of the VMC instrument, lets us take pictures covering a wide area of the planet in the early morning. It is made up of water ice, but despite appearances it … Read our full mailing list consent terms here. Every year during Mars’ summer solstice, a cloud of water ice forms on the leeward side of Arsia Mons, one of Mars’ largest extinct volcanoes. You can find our Community Guidelines in full here. The spiral dust cloud over Arsia Mons can tower 15 to 30 kilometers (9 to 19 miles) above the volcano. So, for how long has it been disappearing and reappearing? The cloud isn’t linked to any volcanic activity, but its formation is associated with the form and altitude of Arsia Mons. A recurrent feature, the cloud is made up of water ice, but despite appearances it is not a plume linked to volcanic activity.Instead, the curious stream forms as airflow is influenced by the volcano’s ‘leeward’ slope − the side that does not face the wind. ISRO / ISSDC / Justin Cowart. The cloud can be seen in this view taken on 10 October by the Visual Monitoring Camera (VMC) on Mars Express – which has imaged it hundreds of times over the past few weeks – as the white, elongated feature extending 1500 km westward of Arsia Mons. The existing Open Comments threads will continue to exist for those who do not subscribe to Independent Premium. Click here to sign in with It would be a dense cloud of CO2 ice crystals therefore would cast a … The Arsia Mons Elongated Cloud (AMEC) is a lee cloud that is spotted over the 20-kilometers (12 miles) high Arsia Mons dormant volcano on Mars. A mysteriously long, thin cloud has again appeared over the 20-km (~12 miles / 65,000 feet) high Arsia Mons volcano on Mars.. 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