30 year (1981 - 2010) annual average number of occurrences of dry and wet events for the Conterminous United States and District of Columbia
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This metadata record describes the annual average number of occurrences of dry and wet events during the 30-year period 1981 – 2010 for the conterminous United...
本元数据记录描述了1981—2010年这30年时段内，美国毗邻地区（conterminous United）干湿事件的年平均发生频次……
