Indicative distribution map for Ecosystem Functional Group T6.1 Ice sheets, glaciers and perennial snowfields

This archive contains indicative distribution maps and profiles for T6.1 Ice sheets, glaciers and perennial snowfields, a ecosystem functional group (EFG, level 3) of the IUCN Global Ecosystem Typology (v2.0). Please refer to Keith et al. (2020) for details. The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).本归档文件包含T6.1冰盖、冰川与永久积雪场的示意性分布图与描述性概览，该分类单元属于世界自然保护联盟（International Union for Conservation of Nature, IUCN）全球生态系统分类体系（v2.0）中的三级生态系统功能群（Ecosystem Functional Group, EFG）。详细信息请参阅Keith等人（2020）的研究成果。 本描述性概览简要总结了该类生态系统的关键生态特征与生态过程；所附分布图仅用于展示全球整体分布格局，无法反映精细尺度的局部分布特征。该类地图标注了全球范围内各生态系统功能群的主要分布区（数值为1，以红色标注）与次要分布区（数值为2，以黄色标注）：次要分布区指生态系统功能群以斑块状零散分布于其他生态系统功能群的基质中，或仅在大区域的局部范围内形成大面积分布的区域。 考虑到源数据的分辨率与精度限制，此类地图仅应用于查询某区域内可能存在的生态系统功能群，而非用于确认特定点位的实际分布情况。该分布图的详细制作方法与参考文献已收录于格式为XML的概览文档中。