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单词 periodicity
释义
periodicity

Geography
  • This refers to recurrences at regular intervals. The major external cycles affecting the Earth are lunar (with daily, monthly, and 18.6 year cycles), planetary cycles, with 20,000- and 400,000-year recurrences (see Milankovitch cycles), and solar cycles; Lean (2010) WIREs Clim. Change, 1: 111 is excellent on this.


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