地理学报

地理学报 ›› 2023, Vol. 78 ›› Issue (9): 2209-2222.doi: 10.11821/dlxb202309006

• 土地利用与“双碳”研究 • 上一篇    下一篇

2000—2020年中国陆地土壤碳储量及土地管理碳汇核算

童荣鑫1,2(), 梁迅1,2,3(), 关庆锋1,2,3, 宋宇1, 陈玉玲3, 王钦艺2,3, 郑丽娜4, 金群4, 余艳平4, 何杰5, 熊雪晖6, 廖威林7   

  1. 1.中国地质大学（武汉）国家地理信息系统工程技术研究中心，武汉 430078
    2.中国地质大学（武汉）自然资源部国土碳汇智能监测与空间调控工程技术创新中心，武汉 430078
    3.中国地质大学（武汉）地理与信息工程学院，武汉 430078
    4.湖北省自然资源厅信息中心，武汉 430071
    5.湖北省地质环境总站，武汉 430034
    6.广东省环境科学研究院，广州 510045
    7.中山大学地理科学与规划学院，广州 510275
  • 收稿日期:2022-11-11 修回日期:2023-06-12 出版日期:2023-09-25 发布日期:2023-09-28
  • 通讯作者: 梁迅(1990-), 男, 教授, 博士生导师, 研究方向为土地利用变化建模和地理时空动态模拟。E-mail: liangxun@cug.edu.cn
    梁迅(1990-), 男, 教授, 博士生导师, 研究方向为土地利用变化建模和地理时空动态模拟。E-mail: liangxun@cug.edu.cn
  • 作者简介:童荣鑫(1994-), 男, 硕士生, 研究方向为土地利用碳储量核算及预测。E-mail: tongrx@cug.edu.cn
  • 基金资助:
    国家自然科学基金项目(42271437);国家自然科学基金项目(42171466);湖北省自然资源厅科研计划项目(ZRZY2022KJ12)

Estimation of soil carbon storage change from land use and management at a high spatial resolution in China during 2000-2020

TONG Rongxin1,2(), LIANG Xun1,2,3(), GUAN Qingfeng1,2,3, SONG Yu1, CHEN Yuling3, WANG Qinyi2,3, ZHENG Lina4, JIN Qun4, YU Yanping4, HE Jie5, XIONG Xuehui6, LIAO Weilin7   

  1. 1. National Engineering Research Center for Geographic Information System, China University of Geosciences, Wuhan 430078, China
    2. Technology Innovation Center for Intelligent Monitoring and Spatial Regulation of Land Carbon Sink, MR of China, China University of Geosciences, Wuhan 430078, China
    3. School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China
    4. Information Center of Department of Natural Resources of Hubei Province, Wuhan 430071, China
    5. Geological Environmental Center of Hubei Province, Wuhan 430034, China
    6. Guangdong Province Academy of Environmental Science; Guangzhou 510045, China
    7. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2022-11-11 Revised:2023-06-12 Published:2023-09-25 Online:2023-09-28
  • Supported by:
    National Natural Science Foundation of China(42271437);National Natural Science Foundation of China(42171466);Scientific Research Program of the Department of Natural Resources of Hubei Province(ZRZY2022KJ12)

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摘要：

中国陆地土壤碳储量和土壤碳汇及管理碳汇对全球碳循环有重要的影响；然而，已有的土壤碳储量和碳汇估算研究主要采用较低分辨率的土地利用数据开展，且生态系统的管理碳汇较少被学者关注。为了解决这个问题，本文基于2000年、2020年中国30 m分辨率土地利用数据、中国气候区、中国温度带等多源数据，汇总国内土壤碳储量、土壤碳汇及土地利用管理碳汇相关的文献成果，采用土壤碳储量、土壤碳储量变化、土地管理碳汇、土地利用转变土壤碳变化核算模型，综合评估了中国2000—2020年农田和草地管理土壤（0~100 cm）碳汇、2000—2020年森林管理碳汇、2000年及2020年中国土壤碳储量（0~100 cm）、2000—2020年土壤碳储量的变化及土地利用转变土壤碳储量的变化。研究发现：① 2000—2020年中国农田管理土壤碳汇达17.918 Tg C a-1，草地管理土壤碳汇约为20.171 Tg C a-1；② 2000—2020年中国森林管理碳汇约为81.622 Tg C a-1。③ 2000年和2020年中国土壤碳储量分别达到86.074 Pg C、86.771 Pg C；④ 2000—2020年土壤碳增加约34.850 Tg C a-1；⑤ 研究时间段内，中国土地利用转变导致土壤碳储量减少约17.621 Tg C a-1。本文研究成果有助于理清中国21世纪土壤碳储量和土壤碳汇及管理碳汇状况，为中国实现“双碳”目标提供科学的数据支持。

关键词: 土壤碳储量, 土壤碳汇, 高分辨率, 土地利用变化, 土地管理碳汇

Abstract:

Soil organic carbon (SOC) storage and soil carbon sinks play a crucial role in the global carbon cycle of terrestrial ecosystem. However, many previous studies of soil carbon storage and sinks utilized low-resolution land use dataset, with limited focus on soil carbon sinks from farmland and grassland management. To address this issue, this study employed a series of accounting models to estimate the carbon sink from farmland and grassland management, the carbon sink from forest management, changes in soil carbon storage, changes in carbon storage due to land use conversion from 2000 to 2020, as well as the soil carbon storage in China in 2000 and 2020 using a 30 m-resolution land use dataset. The results showed that the national carbon sink from farmland management in China was approximately 17.918 Tg C a-1 and the carbon sink from grassland management was approximately 20.171 Tg C a-1 during 2000-2020. The carbon sink from forest management in China was approximately 81.622 Tg C a-1 during 2000-2020. The soil carbon storage (0-100 cm) in China increased from 86.074 Pg C in 2000 to 86.771 Pg C in 2020. The soil carbon storage increased by approximately 34.850 Tg C a-1 from 2000 to 2020. The land use transformation during the study period resulted in a decrease of approximately 17.621 Tg C a-1 in soil carbon storage. The findings of this study can help researchers understand China's carbon storage and provide scientific data to China's 2060 Carbon Neutrality Target.

Key words: soil carbon storage, carbon sinks, high resolution, land use change, carbon sinks from management