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中国沙漠 ›› 2025, Vol. 45 ›› Issue (6): 59-69.DOI: 10.7522/j.issn.1000-694X.2025.00016

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19822024年中国典型沙地碳汇格局演变与驱动力

杜会石1(), 曲玮1, 哈斯额尔敦2()   

  1. 1.吉林师范大学 地理科学与旅游学院,吉林 四平 136000
    2.北京师范大学 地理科学学部自然资源学院,北京 100875
  • 收稿日期:2024-12-13 修回日期:2025-04-01 出版日期:2025-11-20 发布日期:2025-11-26
  • 通讯作者: 哈斯额尔敦
  • 作者简介:杜会石(1983—),男,吉林伊通人,博士,教授,主要从事干旱区地貌研究。E-mail: duhs@jlnu.edu.cn
  • 基金资助:
    国家自然科学基金项目(42271005)

Carbon sequestration in typical sandy lands of China from 1982 to 2024Patternsevolutionand driving forces

Huishi Du1(), Wei Qu1, Hasi Eerdun2()   

  1. 1.College of Geographical Science and Tourism,Jilin Normal University,Siping 136000,Jilin,China
    2.School of Natural Resources,Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China
  • Received:2024-12-13 Revised:2025-04-01 Online:2025-11-20 Published:2025-11-26
  • Contact: Hasi Eerdun

摘要:

中国典型沙地碳汇潜力缺乏长时间序列动态的系统分析和气候变化及人类活动驱动机制的定量解析。本文运用CASA与Thornthwaite Memorial模型,分析了1982—2024年毛乌素沙地、浑善达克沙地、科尔沁沙地、呼伦贝尔沙地和松嫩沙地等典型沙地净生态系统生产力(NEP,C固定量,g·m-2·a-1)的时空变化特征,并探讨了气象与人为因素对NEP演变的驱动机制。结果表明:2024年典型沙地总体NEP均值为166.67 g·m-2·a-1,并表现出显著的空间分异,东部地区沙地碳汇能力显著高于西部地区。其中,松嫩沙地碳汇能力最强,NEP均值为211.08 g·m-2·a-1;毛乌素沙地碳汇能力较弱,NEP均值仅为122.68 g·m-2·a-1。1982—2024年,典型沙地总体NEP呈先降后升趋势,2000年降至最低值130.68 g·m-2·a-1,随后至2024年回升到166.67 g·m-2·a-1;从空间变化来看,碳汇能力增加的区域占研究区总面积的59.96%(10.03万km²),其中显著增加区域占57.79%(96 682.67 km²),主要分布于呼伦贝尔沙地和松嫩沙地,而显著下降区域占35.85%(59 977.05 km²),主要位于毛乌素沙地和浑善达克沙地。人为因素是影响碳汇的主控因素,对碳汇的相对贡献率达49.33%。

关键词: 沙地生态系统, 碳汇, 净生态系统生产力, 气象因素, 人为因素

Abstract:

The potential of carbon sequestration in typical sandy regions of China has long been overlooked,with a lack of systematic analysis over long time series and quantitative assessments of the driving mechanisms of climate change and human activities. In this study,we employed the CASA and Thornthwaite Memorial models to analyze the spatiotemporal variations in net ecosystem productivity (NEP) across typical sandy areas,including the Mu Us Sandy Land,the Hunshandake Sandy Land,the Horqin Sandy Land,the Hulun Buir Sandy Land,and the Songnen Sandy Land,from 1982 to 2024. We also explored the driving mechanisms of meteorological and human factors on the evolution of NEP. The results show that,by 2024,the average annual NEP of the typical sandy regions was 166.67 g·m-2·a-1,with significant spatial differentiation. The carbon sequestration capacity in the eastern regions was notably higher than in the western regions. Among these areas,the Songnen Sandy Land exhibited the strongest carbon sequestration capacity,with an annual NEP of 211.08 g·m-2·a-1,while the Mu Us Sandy Land had a weaker carbon sequestration capacity,with an annual NEP of only 122.68 g·m-2·a-1. From 1982 to 2024,the overall NEP of these regions showed a decline followed by a recovery,reaching a minimum of 130.68 g·m-2·a-1 in 2000 and subsequently rising to 166.67 g·m-2·a-1 by 2024. In terms of spatial changes,the areas with increased carbon sequestration accounted for 59.96% (10.03×10⁴ km²) of the total study area,with significant increases covering 57.79% (96 682.67 km²),primarily distributed in the Hulun Buir Sandy Land and the Songnen Sandy Land. In contrast,areas with significant decreases accounted for 35.85% (59 977.05 km²),mostly in the Mu Us Sandy Land and the Hunshandake Sandy Land. Human activities were the dominant factor contributing to the improvement of carbon sequestration,with a relative contribution rate of 49.33%. This study provides scientific evidence for carbon neutrality and ecological conservation in sandy regions.

Key words: sandy land ecosystems, carbon sequestration, net ecosystem productivity, meteorological factors, human factors

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