منابع مشابه
A global atmospheric model of meteoric iron
[1] The first global model of meteoric iron in the atmosphere (WACCM-Fe) has been developed by combining three components: the Whole Atmosphere Community Climate Model (WACCM), a description of the neutral and ion-molecule chemistry of iron in the mesosphere and lower thermosphere (MLT), and a treatment of the injection of meteoric constituents into the atmosphere. The iron chemistry treats sev...
متن کاملSemi-Molten Meteoric Iron Associated with a Crop Formation
We report the unusual discovery of a natural iron "glaze" composed of fused particles of meteoritic origin, concentrated entirely within a crop formation in England, appearing shortly after the intense Perseid meteor shower in August, 1993. Physical and chemical characteristics as well as spatial distributions indicated reheating to a semi-molten state at the time of crop impact, suggesting inv...
متن کاملRemoval of meteoric iron on polar mesospheric clouds.
Polar mesospheric clouds are thin layers of nanometer-sized ice particles that occur at altitudes between 82 and 87 kilometers in the high-latitude summer mesosphere. These clouds overlap in altitude with the layer of iron (Fe) atoms that is produced by the ablation of meteoroids entering the atmosphere. Simultaneous observations of the Fe layer and the clouds, made by lidar during midsummer at...
متن کاملHow the Fuzzy Creek Iva Iron Got so Fuzzy
gan, T. J. McCoy, R. J. Walker, N. L. Chabot, and W. F. McDonough. Dept of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003. E-mail: [email protected]. The John Hopkins University Applied Physics Lab. Laurel, MD 20723. Dept. Of Mineral Science, National Museum of Natural History, Smithsonian Institution, Washington DC 20560. Dept. of Geology, University o...
متن کاملTesting a Blowing Snow Model Against Distributed Snow Measurements at Upper Sheep Creek, Idaho, USA
In this paper a physically-based snow transport model (SnowTran-3D) was used to simulate snow drifting over a 30 m grid, and was compared to detailed snow water equivalence (SWE) surveys on three dates within a small 0.25 km 2 subwatershed, Upper Sheep Creek. Two precipitation scenarios and two vegetation scenarios were used to carry out four snow transport model runs in order to: (1) evaluate ...
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ژورنال
عنوان ژورنال: American Journal of Science
سال: 1900
ISSN: 0002-9599
DOI: 10.2475/ajs.s4-9.53.367