环北极多年冻土和地下冰分布图是1997年国际冻土协会联合多个国家的冻土研究机构编制的目前唯一的一个国际冻土数据图。该冻土图描述了北半球（20°N to 90°N）多年冻土的分布与属性及地下冰条件。通过连续性划分冻土范围，将多年冻土划分为连续（90-100%）、不连续（50-90%）、零星（10-50%）、岛状（小于10%）和无多年冻土。最上层20米的地下冰丰度通过冰的体积百分比划分（大于20%, 10-20%, 小于10% 和 0%）。发布的ESRI-shape文件源于1:10,000,000的纸质地图（Brown et al. 1997）。该图可用于全球气候变化、极地资源开发和环境保护等相关领域。 中国部分如图6所示。 更多信息参考文献（Heginbottom et al. 1993）。\n\n数据的格式为ESRI shapefiles，可通过美国冰雪数据中心下载（http://nsidc.org/data/ggd318.html）。
", "ds_source": "环北极多年冻土和地下冰分布图是1997年国际冻土协会联合多个国家的冻土研究机构编制的目前唯一的一个国际冻土数据图。
", "ds_process_way": "通过连续性划分冻土范围，将多年冻土划分为连续（90-100%）、不连续（50-90%）、零星（10-50%）、岛状（小于10%）和无多年冻土。最上层20米的地下冰丰度通过冰的体积百分比划分（大于20%, 10-20%, 小于10% 和 0%）。
", "ds_quality": "数据集通过严格的人工审核控制质量
", "ds_acq_start_time": "1997-01-01 00:00:00", "ds_acq_end_time": "1997-12-31 00:00:00", "ds_acq_place": "青藏高原", "ds_acq_lon_east": 135.5, "ds_acq_lat_south": 17.766666666666666, "ds_acq_lon_west": 73.19972222222222, "ds_acq_lat_north": 53.86638888888889, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 1326862, "ds_files_count": 3, "ds_format": "矢量", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "Albers", "ds_thumbnail": "16e16d96-482c-4a1a-9345-6f2fa350690e.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2021-01-11 09:41:26", "last_updated": "2023-08-23 16:46:30", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.577", "i18n": { "en": { "title": "Distribution map of permafrost in China based on \"Diagram of Permafrost and Subsurface Ice State of the Circumpolar Arctic\" (2nd Edition)", "ds_format": "Vector", "ds_source": "The distribution map of permafrost and underground ice around the Arctic is the only international permafrost data map compiled by the International Association of permafrost and permafrost research institutions of many countries in 1997.
", "ds_quality": "Data set quality control through strict manual audit
", "ds_ref_way": "", "ds_abstract": "The distribution map of permafrost and underground ice around the Arctic is the only international permafrost data map compiled by the International Association of permafrost and permafrost research institutions of many countries in 1997. The permafrost map describes the distribution and properties of permafrost in the northern hemisphere (20 ° n to 90 ° n) and the underground ice conditions. Permafrost can be divided into continuous (90-100%), discontinuous (50-90%), sporadic (10-50%), Island (less than 10%) and no permafrost. The underground ice abundance at the top 20 meters is divided by the volume percentage of ice (more than 20%, 10-20%, less than 10% and 0%). The ESRI shape file was released from a 1:10000000 paper map (Brown et al. 1997). The map can be used in global climate change, polar resource development, environmental protection and other related fields. The Chinese part is shown in Figure 6. For more information, refer to the literature (heginbottom et al. 1993).
", "ds_time_res": "", "ds_acq_place": "Qinghai Tibet Plateau", "ds_space_res": "", "ds_projection": "Albers", "ds_process_way": "Permafrost can be divided into continuous (90-100%), discontinuous (50-90%), sporadic (10-50%), Island (less than 10%) and no permafrost. The underground ice abundance at the top 20 meters is divided by the volume percentage of ice (more than 20%, 10-20%, less than 10% and 0%).
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "分布图", "多年冻土", "冻土" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "青藏高原" ], "ds_time_tags": [ 1997 ], "ds_contributors": [ { "true_name": "吴立宗", "email": "wulizong@pric.org.cn", "work_for": "国家极地科学数据中心", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "吴立宗", "email": "wulizong@pric.org.cn", "work_for": "国家极地科学数据中心", "country": "中国" } ], "ds_managers": [ { "true_name": "李红星", "email": "lihongxing@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "冻土" }