荒漠化是指在干旱地区（包括极端干旱区，干旱指数AI < 0.05），2000年时为非森林的土地覆被类型转化为裸地，并导致其基本生态系统服务丧失的过程。根据土地退化类型，荒漠化可进一步划分为农业荒漠化、草地荒漠化、湿地荒漠化、灌木林地荒漠化和稀疏植被荒漠化。
\n本研究采用的数据包括：源自空间分辨率为4 km的TerraClimate数据库的干旱指数，欧洲空间局气候变化倡议的土地覆被产品（ESA CCI LC），以及经过联合国调整的、空间分辨率为300 m的WorldPop人口数据。
\n研究时段为2001年至2018年，空间分析分辨率为300 m。
\n荒漠化类型（203）包括农业荒漠化（代码2）、草地荒漠化（代码3）、湿地荒漠化（代码4）、灌木林地荒漠化（代码5）和稀疏植被荒漠化（代码6）。
", "ds_source": "干旱指数数据源自空间分辨率为4 km的TerraClimate数据集（https://www.climatologylab.org/terraclimate.html），土地覆被数据采用ESA CCI LC产品（https://maps.elie.ucl.ac.be/CCI/viewer/index.php），而已暴露于荒漠化的人口数据则基于经过联合国调整、空间分辨率为300 m的WorldPop人口统计数据集（https://www.worldpop.org/geodata/listing?id=69）。
", "ds_process_way": "以生态系统服务损失为切入点，动态评估全球已经荒漠化的土地面积及受影响人口规模。
", "ds_quality": "数据质量良好。
", "ds_acq_start_time": "2001-01-01 00:00:00", "ds_acq_end_time": "2018-12-31 00:00:00", "ds_acq_place": "全球", "ds_acq_lon_east": 180.0, "ds_acq_lat_south": 90.0, "ds_acq_lon_west": 180.0, "ds_acq_lat_north": 90.0, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 759145056, "ds_files_count": 7, "ds_format": ".shp", "ds_space_res": "300m", "ds_time_res": "年", "ds_coordinate": "WGS84", "ds_projection": "WGS_1984", "ds_thumbnail": "65aa0554-6913-4507-b5ca-e4b3fa49e6fb.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "0a4269e1-65f4-45f1-aeba-88ea3068eebf", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.5281/zenodo.7505440", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2023-07-24 17:59:04", "last_updated": "2025-11-19 09:58:06", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.ZENODO.DB3957.2023", "i18n": { "en": { "title": "A dataset of desertification exposure (2001-2018)", "ds_format": ".shp", "ds_source": "Aridity index is from TerraClimate with a 4-km resolution (https://www.climatologylab.org/terraclimate.html), land cover products are ESA CCI-LC product (http://maps.elie.ucl.ac.be/CCI/viewer/index.php), population data exposed to desertification are adjusted WorldPop population data (https://www.worldpop.org/geodata/listing?id=69) with a 300-m resolution。
", "ds_quality": "The data quality is good.
", "ds_ref_way": "", "ds_abstract": "Desertification is revised as: in dryland areas (including hyper-arid areas AI<0.05), non-forest land covers in 2000 change into bare land, and the bareness results in deprivation of essential ecosystem services. According to categories of land degradation, total desertification is further defined as agriculture desertification, grassland desertification, wetland desertification, shrubland desertificationand sparse vegetation desertification, respectively. \n
\nThe study period is 2001-2018, and the spatial resolution is 300-m.\n
\nDesertification types include agriculture desertification (code 2), grassland desertification (code 3), wetland desertification (code 4), shrubland desertification (code 5) and sparse vegetation desertification (code 6).
", "ds_time_res": "年", "ds_acq_place": "Global", "ds_space_res": "300m", "ds_projection": " WGS_1984", "ds_process_way": "Classify and process deserts based on various types of data.
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "ds_topic_tags": [ "荒漠化", "农业荒漠化", "草地荒漠化" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "全球" ], "ds_time_tags": [ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 ], "ds_contributors": [ { "true_name": "李国帅", "email": "liguoshuai@lzb.ac.cn", "work_for": "中国科学院西北生态环境与资源研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "李国帅", "email": "liguoshuai@lzb.ac.cn", "work_for": "中国科学院西北生态环境与资源研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "李国帅", "email": "liguoshuai@lzb.ac.cn", "work_for": "中国科学院西北生态环境与资源研究所", "country": "中国" } ], "category": "沙漠与荒漠化" }