Concept information
优选词，正式主题词
创建的: 2019-09-04T12:02:37
定义
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A polynya is an area of open water surrounded by sea ice. It is used as a geographical term for an area of unfrozen seawater within otherwise contiguous pack ice or fast ice.
(en)
上位概念
其它语言
URI
http://aims.fao.org/aos/agrovoc/c_86bda733
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