Snow megadune fields on the East Antarctic Plateau: Extreme atmosphere‐ice interaction
Snow megadune fields on the East Antarctic Plateau: Extreme atmosphere‐ice interaction
复制标题
南极东部高原的雪沙丘场：极端的大气-冰相互作用
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
R. Kwok
中科院分区：
文献类型：
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作者：
M. Fahnestock;T. Scambos;C. Shuman;R. Arthern;D. Winebrenner;R. Kwok
大型沙丘区占据了南极东部高原50多万平方公里。“大波”，或长波表面波纹，振幅只有几米，波长只有几公里，平行波峰可以延伸100公里。它们发生在积雪少、积雪重结晶广泛、光谱微波部分散射强的地区。沙丘峰的方向垂直于区域倾斜风向。巨型雪团不太可能是由雪粒子的简单风运形成的。
Large dune fields occupy more than 500,000 km² of the East Antarctic Plateau. The “megadunes”, or long‐wavelength surface ripples, have amplitudes of only a few meters, wavelengths of a few kilometers, and parallel crests which can extend one hundred kilometers. They occur in areas characterized by low accumulation, extensively recrystallized snow, and strong scattering of the microwave part of the spectrum. Dune crests are oriented perpendicular to the regional katabatic wind direction. Snow megadunes are unlikely to be formed by simple wind transport of snow particles.