کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8135833 1523525 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Present-day aeolian activity in Herschel Crater, Mars
ترجمه فارسی عنوان
فعالیت فعلی امروز در مریخ هرشل، مریخ
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
چکیده انگلیسی
We estimate an average dune migration of 0.8 m and a minimum ripple migration of 1.1 m in a time span of 3.7 Earth-years. These dunes and ripples are mainly shaped by prevailing winds coming from the north, however we also report the presence of secondary winds which elongate the barchans' horns. Such a complex wind scenario is likely caused by the influence of winds blowing off the western crater rim as suggested by the Mars Regional Atmospheric Modeling System (MRAMS), an atmospheric mesoscale model. A multi-directional wind regime at the local scale is also supported by the observed bimodal distribution of the ripple trends. For the first time, a survey integrating the assessment of dune and ripple migration is presented, showing how dune topography can influence the migration patterns of ripples and how underlying topography appears to control the rates of dune migration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 265, February 2016, Pages 139-148
نویسندگان
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