The Emirates Mars Mission (EMM) science phase began in Martian Year 36, solar longitude 49, which is outside of the classical Mars dust storm season. EMM observed a distinct dust cloud at northern mid-to-high latitudes on 10 September 2021 (Martian Year 36, solar longitude 97). The dust cloud is an arc-shaped dust storm, typically observed at the northern polar cap edge. This type of non-season dust storm is a well-known phenomenon, but this particular case is interesting because the dust cloud has frontal structure. A large atmospheric front is unusual in this location and season. Moreover, EMM's unique observational coverage adds value to this observation. EMM provided a sequence of four camera images, which are separated by just 2–3 hr. The dust cloud showed very little motion over 7–8 hr, that is, it is quasi-stationary. We discuss relevant dynamical processes, supported by a consistency check with the Mars Climate Database.
|Journal||Geophysical Research Letters|
|Publication status||Published - Oct 28 2022|
- dust storm
- Emirates Mars mission
- polar cap
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)