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原文:
It was late in the northern martian spring when the HiRISE camera onboard the Mars Reconnaissance Orbiter spied this local denizen. Tracking across the flat, dust-covered Amazonis Planitia in 2012, the core of this whirling dust devil is about 140 meters in diameter. Lofting dust into the thin martian atmosphere, its plume reaches about 20 kilometers above the surface. Common to this region of Mars, dust devils occur as the surface is heated by the Sun, generating warm, rising air currents that begin to rotate. Tangential wind speeds of up to 110 kilometers per hour are reported for dust devils in other HiRISE images. Follow APOD on: Facebook, Google Plus, or Twitter
中文翻譯:
在北方火星春季的晚期,Mars Reconnaissance Orbiter 上的 HiRISE 相機拍攝到這個當地的居民。這個旋轉的塵暴於2012年橫掃平坦的、覆蓋著灰塵的亞馬遜平原,其核心直徑約為 140 米。它將灰塵捲入稀薄的火星大氣中,塵埃雲的高度可達約20公里。這種現象在火星這個區域十分常見,當地表受到陽光加熱時,產生溫暖的上升氣流,開始旋轉。在其他 HiRISE 圖像中報導的切向風速可高達 110 公里每小時。
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#火星 #塵暴 #HiRISE #亞馬遜平原 #科學探索 #太空攝影 #Mars #DustDevil #AmazonisPlanitia #SpaceScience #NASA
來源:NASA每日圖片