Temporal and spatial correlation analysis of land cover change and net ecosystem carbon exchange in globally representative river basins

doi:10.13474/j.cnki.11-2246.2024.0202

Abstract

Abstract: With socio-economic development, the management objectives of river basins shift from early flood control, water supply, and navigation to comprehensive management focusing on resource utilization and ecological protection, playing a significant role in the global ecosystem carbon balance. As an important indicator for quantifying ecosystem carbon sequestration capacity, net ecosystem carbon exchange (NEE) exhibits significant differences in carbon source/sink capacity among different surface cover types. Exploring the temporal and spatial correlation between globally representative river basin surface cover types and NEE is of great significance for basin ecological management. Based on the global 30 m surface cover dataset (GlobeLand30) and global land net ecosystem carbon exchange data, this study analyzes the temporal and spatial characteristics of surface cover and NEE changes in 8 typical river basins worldwide from 2000 to 2020, and investigates the temporal and spatial correlation between surface cover type changes and NEE. The results show that: ① From 2000 to 2020, the area of cropland, bare, artificial surfaces, wetlands, water, and tundra increased significantly, while grassland increased first and then decreases, it showed an overall increasing trend. ② From 2000 to 2020, the NEE value of the basin decreased first and then increased with the overall decreasing trend and enhanced carbon sink capacity. The basin exhibited a carbon sink, but the mean NEE showed an overall increasing trend, indicating a weakening carbon sink capacity. ③ During 2000—2020, there was a significant negative correlation between grassland and NEE, where the relationship between cropland, bare, artificial surface, wetland and water with NEE was positive in 2010—2020. The change of land cover type had a significant impact on NEE. This research provides theoretical references for basin carbon neutrality regulation and spatial optimization control, and promotes coordinated emission reduction and high-quality development of river basins.

Key words: net ecosystem carbon exchange, surface cover type, temporal and spatial changes, typical river basins

CLC Number:

P237

CHEN Lei, MA Ying, ZHA Fengli, LIN Yanzhen, SHI Guangbin. Temporal and spatial correlation analysis of land cover change and net ecosystem carbon exchange in globally representative river basins[J]. Bulletin of Surveying and Mapping, 2024, 0(2): 8-13,31.

References

[1] 陈小平,刘廷玺,王冠丽,等. 温度和水分对科尔沁草甸湿地净生态系统碳交换量的影响[J]. 应用生态学报,2018,29(5): 1523-1534.
[2] 孙学凯,林力涛,于占源,等. 施氮对沙质草地生态系统碳交换特征的影响[J]. 生态学杂志,2019,38(1): 104-112.
[3] 李文宇,张扬建,沈若楠,等. 氮磷共限制青藏高原高寒草甸生态系统碳吸收[J]. 应用生态学报,2022,33(1): 51-58.
[4] 王亚楠,龙慧灵,袁占良,等. 基于涡度相关的黑河玉米生态系统生长季碳通量和固碳能力变化特征研究[J]. 河南农业科学,2015,44(8): 154-159.
[5] 李俊,于强,孙晓敏,等. 华北平原农田生态系统碳交换及其环境调控机制[J]. 中国科学D辑: 地球科学,2006,36(S1): 210-223.
[6] 顾峰雪,曹明奎,于贵瑞,等. 典型森林生态系统碳交换的机理模拟及其与观测的比较研究[J]. 地球科学进展,2007,22(3): 313-321.
[7] 晨阳,李慧融,李冬楠,等. 锡林浩特草原净生态系统碳交换量特征及源区分布[J]. 应用生态学报,2023,34(6): 1509-1516.
[8] 王永志,刘胜林. 黄河三角洲芦苇湿地生态系统碳通量动态特征及其影响因素[J]. 生态环境学报,2021,30(5): 949-956.
[9] 邢白灵. 地表覆盖变化对南京市生态系统净初级生产力的影响[D]. 南京: 南京大学,2012.
[10] LI Hanwei,DING Juhua,ZHANG Jiang,et al. Effects of land cover changes on net primary productivity in the terrestrial ecosystems of China from 2001 to 2012[J]. Land,2020,9(12): 480.
[11] 陈军,廖安平,陈晋,等. 全球30 m地表覆盖遥感数据产品-Globe Land30[J]. 地理信息世界,2017,24(1): 1-8.
[12] XIE Huan,DU Li,LIU Sicong,et al. Dynamic monitoring of agricultural fires in China from 2010 to 2014 using MODIS and GlobeLand30 data[J]. ISPRS International Journal of Geo-Information,2016,5(10): 172.
[13] 李然,匡文慧,陈军,等. 基于GlobeLand30的全球人造地表利用效率时空差异特征分析[J]. 中国科学: 地球科学,2016,46(11): 1436-1445.
[14] LIAN Yi,LI Haixiao,RENYANG Qianqian,et al. Mapping the net ecosystem exchange of CO₂ of global terrestrial systems[J]. International Journal of Applied Earth Observation and Geoinformation,2023,116: 103176.
[15] 朱湾湾,许艺馨,余海龙,等. 降水量与氮添加对荒漠草原生态系统碳交换的影响[J]. 生态学报,2021,41(16): 6679-6691.
[16] 王赟博,孙宇,赵清格,等. 阴山北麓农牧交错区退耕地草地生态系统碳交换及水分利用效率[J]. 生态学报,2022,42(12): 4922-4932.