منابع مشابه
North polar cap of Mars: Polar layered deposit characterization and identification of a fundamental climate signal
[1] The record of recent climate change on Mars is encoded in the polar layered deposits within the north polar cap. Individual Mars Orbiter Camera (MOC) images of exposed layer sequences in cliffs and troughs provide the equivalent of high resolution ‘‘cores’’ through many sections in the upper part of the north polar layered terrain. In order to decode this record it is necessary 1) to quanti...
متن کاملCharacterization of the morphometry of impact craters hosting polar deposits in Mercury's north polar region
Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA. NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC, USA. Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York, USA. Planetary Science Institute, Tucson...
متن کاملOrigin and characteristics of the Mars north polar basal unit and implications for polar geologic history
Building upon previous studies, we have used Mars Orbiter Camera and Mars Orbiter Laser Altimeter data to characterize in detail the newly discovered north polar basal unit. Lying stratigraphically between the polar layered deposits, from which it is likely separated by an unconformity, and the Vastitas Borealis Formation, this unit has introduced new complexity into north polar stratigraphy an...
متن کاملA long-term climatology of North Atlantic polar lows
[1] A dynamical downscaling of the 6-hourly 1948–2006 NCEP/NCAR re-analyses for the subarctic region of the North Atlantic has been used to derive a climatology of polar lows by means of a tracking algorithm based on the simulated bandpass filtered MSLP-fields. This climatology is consistent with the limited observational evidence in terms of frequency and spatial distribution. The climatology ...
متن کاملMeter-scale morphology of the north polar region of Mars.
Mars' north pole is covered by a dome of layered ice deposits. Detailed ( approximately 30 centimeters per pixel) images of this region were obtained with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter (MRO). Planum Boreum basal unit scarps reveal cross-bedding and show evidence for recent mass wasting, flow, and debris accumulation. The north polar laye...
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ژورنال
عنوان ژورنال: Scottish Geographical Magazine
سال: 1903
ISSN: 0036-9225
DOI: 10.1080/00369220308733499