NATURE AND POSSIBLE CAUSES OF THE NORTHEASTERN UNITED STATES DROUGHT DURING 1962–65
NATURE AND POSSIBLE CAUSES OF THE NORTHEASTERN UNITED STATES DROUGHT DURING 1962–65
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1962-65 年美国东北部干旱的性质和可能原因
DOI：
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发表时间：
1966
期刊：
影响因子：
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通讯作者：
J. Namias
中科院分区：
文献类型：
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作者：
J. Namias
摘要在过去的4年里，美国大部分地区都发生了值得注意的持续天气波动，其中最突出的是东北部降水不足，而西南部和北方平原降水过多。这些异常的性质描述的帮助下，确定为40个气候均匀的地区的国家的降水的季节性频率分布。从这一点和其他材料表明，东北干旱主要是一个春季和夏季的现象，在同一时间，丰富的降雨发生在北方平原和远西南。大尺度高空气流通过与气团和风暴的相互作用促进或抑制降水，下面将加以描述。四年一度的高空风中最一致的年与年的特征是东部沿海附近西风带的一个向南倾斜，另一个在远东地区。
Abstract During the past 4 years noteworthy weather fluctuations of a persistent kind have occurred over large portions of the United States, the most prominent, of which have been the deficiency in precipitation over the Northeast and the excess over the Southwest and the Northern Plains. The nature of these abnormalities is described with the help of seasonal frequency distributions of precipitation determined for 40 climatologically homogeneous areas of the country. From this and other material it is shown that the Northeast drought has been largely a spring and summer phenomenon at the same time when abundant rains occurred over the Northern Plains and Far Southwest. The large-scale upper-air currents favoring or inhibiting precipitation through interactions with air masses and storms are next described. The most consistent year-to-year feature of these upper winds in the quadrennial has been the persistence of one southward dip in the westerlies just off the eastern seaboard and another over the Far ...