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环北极地区多年冻土和地下冰状态图(V2)(1997)

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国家青藏高原科学数据中心2021-04-19 更新2024-03-01 收录
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数据集包括: 1、permaice(冻土类型图) 2、subsea(海底界线矢量图)3、treeline(林线矢量图)4、nhipa(栅格图)5、llipa(栅格图) Permaice包括属性字段:Num_code(冻土属性编码) Combo(冻土属性)extent(冻土范围)content(含冰量) 属性对照如下:(1)冻土属性对照表: 0 (No information ) 1 - chf (Continuous permafrost extent with high ground ice content and thick overburden) 2 - dhf (Discontinuous permafrost extent with high ground ice content and thick overburden ) 3 - shf (Sporadic permafrost extent with high ground ice content and thick overburden ) 4 - ihf (Isolated patches of permafrost extent with high ground ice content and thick overburden ) 5 - cmf (Continuous permafrost extent with medium ground ice content and thick overburden ) 6 - dmf (Discontinuous permafrost extent with medium ground ice content and thick overburden ) 7 - smf (Sporadic permafrost extent with medium ground ice content and thick overburden ) 8 - imf (Isolated patches of permafrost extent with medium ground ice content and thick overburden) 9 - clf (Continuous permafrost extent with low ground ice content and thick overburden ) 10 - dlf (Discontinuous permafrost extent with low ground ice content and thick overburden ) 11 - slf (Sporadic permafrost extent with low ground ice content and thick overburden ) 12 - ilf (Isolated patches of permafrost extent with low ground ice content and thick overburden) 13 - chr (Continuous permafrost extent with high ground ice content and thin overburden and exposed bedrock ) 14 - dhr (Discontinuous permafrost extent with high ground ice content and thin overburden and exposed bedrock ) 15 - shr (Sporadic permafrost extent with high ground ice content and thin overburden and exposed bedrock ) 16 - ihr (Isolated patches of permafrost extent with high ground ice content and thin overburden and exposed bedrock) 17 - clr (Continuous permafrost extent with low ground ice content and thin overburden and exposed bedrock ) 18 - dlr (Discontinuous permafrost extent with low ground ice content and thin overburden and exposed bedrock ) 19 - slr (Sporadic permafrost extent with low ground ice content and thin overburden and exposed bedrock) 20 - ilr (Isolated patches of permafrost extent with low ground ice content and thin overburden and exposed bedrock ) 21 - g (Glaciers) 22 - r (Relict permafrost) 23 - l (Inland lakes ) 24 - o (Ocean/inland seas ) 25 - ld (Land) (2)冻土范围对照表 c = continuous (90-100%) d = discontinuous (50- 90%) s = sporadic (10- 50%) i = isolated patches ( 0 - 10%) (3)含冰量对照表 h = high (>20% for "f" landform codes) (>10% for "r" landform codes) m = medium (10-20%) l = low (0-10%) ------------------------------------------------------------ Projection of the shapefiles is: PROJCS["Sphere_ARC_INFO_Lambert_Azimuthal_Equal_Area", GEOGCS["GCS_Sphere_ARC_INFO", DATUM["Sphere_ARC_INFO", SPHEROID["Sphere_ARC_INFO",6370997.0,0.0]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Lambert_Azimuthal_Equal_Area"], PARAMETER["False_Easting",0.0], PARAMETER["False_Northing",0.0], PARAMETER["longitude_of_center",180.0], PARAMETER["latitude_of_center",90.0], UNIT["Meter",1.0]] Projection for the raster (*.byte) files is: Projection: Lambert Azimuthal Units: meters Spheroid: defined Major Axis: 6371228.00000 Minor Axis: 6371228.000 Parameters: radius of the sphere of reference: 6371228.00000 longitude of center of projection: 0 latitude of center of projection: 90 false easting (meters): 0.00000 false northing (meters): 0.00000

本数据集包含以下地理要素图层:1、冻土类型图(permaice);2、海底界线矢量图(subsea);3、林线矢量图(treeline);4、栅格图(nhipa);5、栅格图(llipa)。 冻土类型图(permaice)的属性字段包括:Num_code(冻土属性编码)、Combo(冻土属性)、extent(冻土范围)、content(含冰量)。 属性对照说明如下: (1)冻土属性对照表: 0:无信息(No information) 1 - chf:连续多年冻土区,地下冰含量高且覆盖层厚(Continuous permafrost extent with high ground ice content and thick overburden) 2 - dhf:不连续多年冻土区,地下冰含量高且覆盖层厚(Discontinuous permafrost extent with high ground ice content and thick overburden) 3 - shf:零星多年冻土区,地下冰含量高且覆盖层厚(Sporadic permafrost extent with high ground ice content and thick overburden) 4 - ihf:孤立斑块状多年冻土区,地下冰含量高且覆盖层厚(Isolated patches of permafrost extent with high ground ice content and thick overburden) 5 - cmf:连续多年冻土区,地下冰含量中等且覆盖层厚(Continuous permafrost extent with medium ground ice content and thick overburden) 6 - dmf:不连续多年冻土区,地下冰含量中等且覆盖层厚(Discontinuous permafrost extent with medium ground ice content and thick overburden) 7 - smf:零星多年冻土区,地下冰含量中等且覆盖层厚(Sporadic permafrost extent with medium ground ice content and thick overburden) 8 - imf:孤立斑块状多年冻土区,地下冰含量中等且覆盖层厚(Isolated patches of permafrost extent with medium ground ice content and thick overburden) 9 - clf:连续多年冻土区,地下冰含量低且覆盖层厚(Continuous permafrost extent with low ground ice content and thick overburden) 10 - dlf:不连续多年冻土区,地下冰含量低且覆盖层厚(Discontinuous permafrost extent with low ground ice content and thick overburden) 11 - slf:零星多年冻土区,地下冰含量低且覆盖层厚(Sporadic permafrost extent with low ground ice content and thick overburden) 12 - ilf:孤立斑块状多年冻土区,地下冰含量低且覆盖层厚(Isolated patches of permafrost extent with low ground ice content and thick overburden) 13 - chr:连续多年冻土区,地下冰含量高、覆盖层薄且基岩裸露(Continuous permafrost extent with high ground ice content and thin overburden and exposed bedrock) 14 - dhr:不连续多年冻土区,地下冰含量高、覆盖层薄且基岩裸露(Discontinuous permafrost extent with high ground ice content and thin overburden and exposed bedrock) 15 - shr:零星多年冻土区,地下冰含量高、覆盖层薄且基岩裸露(Sporadic permafrost extent with high ground ice content and thin overburden and exposed bedrock) 16 - ihr:孤立斑块状多年冻土区,地下冰含量高、覆盖层薄且基岩裸露(Isolated patches of permafrost extent with high ground ice content and thin overburden and exposed bedrock) 17 - clr:连续多年冻土区,地下冰含量低、覆盖层薄且基岩裸露(Continuous permafrost extent with low ground ice content and thin overburden and exposed bedrock) 18 - dlr:不连续多年冻土区,地下冰含量低、覆盖层薄且基岩裸露(Discontinuous permafrost extent with low ground ice content and thin overburden and exposed bedrock) 19 - slr:零星多年冻土区,地下冰含量低、覆盖层薄且基岩裸露(Sporadic permafrost extent with low ground ice content and thin overburden and exposed bedrock) 20 - ilr:孤立斑块状多年冻土区,地下冰含量低、覆盖层薄且基岩裸露(Isolated patches of permafrost extent with low ground ice content and thin overburden and exposed bedrock) 21 - g:冰川(Glaciers) 22 - r:残留多年冻土(Relict permafrost) 23 - l:内陆湖泊(Inland lakes) 24 - o:海洋/内陆海(Ocean/inland seas) 25 - ld:陆地(Land) (2)冻土范围对照表: c = 连续(覆盖占比90%-100%) d = 不连续(覆盖占比50%-90%) s = 零星(覆盖占比10%-50%) i = 孤立斑块(覆盖占比0%-10%) (3)含冰量对照表: h = 高含量(针对“f”类地形编码,地下冰占比>20%;针对“r”类地形编码,地下冰占比>10%) m = 中含量(地下冰占比10%-20%) l = 低含量(地下冰占比0%-10%) 矢量Shapefile的投影定义如下: PROJCS["Sphere_ARC_INFO_Lambert_Azimuthal_Equal_Area", GEOGCS["GCS_Sphere_ARC_INFO", DATUM["Sphere_ARC_INFO", SPHEROID["Sphere_ARC_INFO",6370997.0,0.0]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Lambert_Azimuthal_Equal_Area"], PARAMETER["False_Easting",0.0], PARAMETER["False_Northing",0.0], PARAMETER["longitude_of_center",180.0], PARAMETER["latitude_of_center",90.0], UNIT["Meter",1.0]] 栅格(*.byte)文件的投影定义如下: 投影方式:兰伯特方位等面积投影 单位:米 参考椭球体:已定义 长半轴:6371228.00000米 短半轴:6371228.000米 投影参数: 参考球面半径:6371228.00000米 投影中心经度:0° 投影中心纬度:90° 伪东向偏移(米):0.00000 伪北向偏移(米):0.00000
提供机构:
O. Ferrians,J. A. Heginbottom,E. Melnikov,Tingjun Zhang,冉有华
创建时间:
2011-09-05
搜集汇总
数据集介绍
main_image_url
背景与挑战
背景概述
该数据集是环北极地区多年冻土和地下冰状态图(版本V2,参考时间1997年),包含冻土类型图、海底界线矢量图、林线矢量图及栅格图等文件,详细编码了冻土范围、含冰量和属性信息。数据大小为207.05 MB,采用开放获取共享方式,适用于冰冻圈科学中的冻土分布和地下冰研究,需遵循CC BY-NC-SA 4.0许可协议并正确引用相关文献。
以上内容由遇见数据集搜集并总结生成
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