全球土壤有机碳的周转时间是陆地生态系统功能的核心要素。本数据整合了多项尖端观测数据集，包括逾90,000份地理定位土壤剖面、最新全球分布的根系观测数据以及大量卫星衍生的环境变量，从而生成表层土壤（0–0.3m）与底土（0.3–1m）中表观周转时间的全球分布图，其空间分辨率达30弧秒（赤道地区约1km）。", "ds_source": "
数据来源于ESSD网站（https://essd.copernicus.org/articles/17/2605/2025/）。", "ds_process_way": "
本数据加工方法围绕表层与下层土壤有机碳周转时间（τ）展开：先基于土壤样本数据库估算土壤有机碳（SOC）储量，并进行地下碳分配估算，以此为基础得到 τ 数值；再结合地理空间信息完成 τ 的地理空间制图；随后分析环境控制因素对 τ 空间分布的影响；最后通过交叉验证评估制图精度，并量化数据加工过程中的不确定性，形成完整流程。", "ds_quality": "
数据质量较好。", "ds_acq_start_time": null, "ds_acq_end_time": null, "ds_acq_place": "全球", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 5074661611, "ds_files_count": 2, "ds_format": "tiff", "ds_space_res": "30弧秒", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "343899f0-c8e4-4c97-8e9d-b483c36390e5.png", "ds_thumb_from": 2, "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": "", "subject_codes": [ "170.30" ], "quality_level": 3, "publish_time": "2025-09-29 21:25:07", "last_updated": "2026-01-14 11:09:41", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.ZENODO.DB7054.2025", "i18n": { "en": { "title": "Global maps of top- and subsoil organic carbon turnover times", "ds_format": "", "ds_source": "
The data is sourced from the ESSD website（ https://essd.copernicus.org/articles/17/2605/2025/ ）.", "ds_quality": "
The data quality is good.", "ds_ref_way": "", "ds_abstract": "
The turnover time of global soil organic carbon is a core element of terrestrial ecosystem function. This data integrates multiple cutting-edge observation datasets, including over 90000 geographically located soil profiles, the latest global distribution of root observation data, and a large number of satellite derived environmental variables, to generate a global distribution map of apparent turnover time in surface soil (0-0.3m) and subsoil (0.3-1m), with a spatial resolution of 30 arcseconds (approximately 1km in equatorial regions).
", "ds_time_res": "", "ds_acq_place": "global", "ds_space_res": "30弧秒", "ds_projection": "", "ds_process_way": "This data processing method revolves around the turnover time (τ) of organic carbon in the surface and lower layers of soil: firstly, the soil organic carbon (SOC) storage is estimated based on the soil sample database, and the underground carbon allocation is estimated, based on which the τ value is obtained; Combined with geographic spatial information, complete the geographic spatial mapping of τ; Subsequently, analyze the impact of environmental control factors on the spatial distribution of τ; Finally, the mapping accuracy is evaluated through cross validation, and the uncertainty in the data processing process is quantified to form a complete process.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_outside", "cstr_reg_from": "reg_outside", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "表层土壤", "底层土壤", "有机碳周转时间" ], "ds_subject_tags": [ "地球化学" ], "ds_class_tags": [], "ds_locus_tags": [ "全球" ], "ds_time_tags": [], "ds_contributors": [ { "true_name": "杨琳", "email": "yanglin@nju.edu.cn", "work_for": "南京大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "杨琳", "email": "yanglin@nju.edu.cn", "work_for": "南京大学", "country": "中国" } ], "ds_managers": [ { "true_name": "杨琳", "email": "yanglin@nju.edu.cn", "work_for": "南京大学", "country": "中国" } ], "category": "水文" }