甘肃省土地利用转变对碳储量变化的影响研究

doi:10.12118/j.issn.1000-6060.2024.040

Abstract

Abstract:

There is a close relationship between the carbon stock in terrestrial ecosystems and the global climate crisis. Using the InVEST model and ArcGIS software, combined with land use data for Gansu Province, China across three phases (2000, 2010, and 2020), the dynamic changes in land use types and carbon stock were assessed and analyzed. The results indicate that: (1) The areas of unused land and arable land decreased significantly between 2000 and 2020, while construction land, grassland, forest land, and water bodies exhibited an increasing trend. Land type transitions within the province were primarily dominated by conversions between grassland and arable land. (2) The cumulative increase in carbon stock in Gansu Province from 2000 to 2020 amounted to 331.24×10⁴ t, following a trend of initial increase followed by a decline. (3) The conversion of unused land to arable land and grassland to forest land contributed to the enhancement of regional carbon stock, whereas the conversion of arable land to construction land and grassland to unused land posed significant constraints on the increase in regional carbon stock. This study provides a valuable reference for future land use planning and ecological restoration efforts in Gansu Province.

Key words: carbon stock, land use type, InVEST modeling, Gansu Province

JIANG Xiaoxiao, LI Xuemei, HAN Hui, XU Min, LING Hongbo. Influence of land use transformation on carbon storage change in Gansu Province[J].Arid Land Geography, 2024, 47(12): 2075-2082.

Figures/Tables 7

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References 32

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土地利用类型	地上碳密度	地下碳密度	土壤有机碳密度	死亡有机物碳密度
耕地	1.10	15.00	91.10	0.74
林地	8.10	22.00	158.80	4.78
草地	6.70	16.40	83.90	1.83
水域	0.60	0.00	0.00	0.32
建设用地	0.50	0.00	0.00	0.00
未利用地	0.20	0.00	21.60	0.00

年份	耕地	林地	草地	水域	建设用地	未利用地
2000	65592.35	37654.03	142665.13	3302.68	3568.89	172736.68
2010	65054.49	38549.23	142976.28	3543.75	4311.77	171085.44
2020	63882.16	38516.77	143663.40	3840.51	5564.31	170030.48

指标	2000年	2010年	2020年
地上碳储量	13713.19	13802.49	13838.94
地下碳储量	41716.60	41882.28	41808.46
土壤有机碳储量	276556.41	277392.38	276621.47
死亡有机物碳储量	4906.59	4951.86	4955.16
总碳储量	336892.79	338029.01	337224.03
总碳储量变化量	-	1136.22	-804.98
总碳储量变化率/%	-	0.34	-0.24

Influence of land use transformation on carbon storage change in Gansu Province

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