Carbon-oxygen balance analysis of the terrestrial ecosystem of Beijing-Tianjin-Hebei region in 2025
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摘要:
以2020年的京津冀地区数据为基准，测算出2020年释碳耗氧量、固碳释氧量，对2025年释碳耗氧量、固碳释氧量、生态用地需求面积进行预测。结果表明：2020年京津冀地区释碳量和耗氧量分别为125 576.1万和143 533.7万t。预测出2025年京津冀地区释碳量和耗氧量分别为135 957.0万和163 392.0万t。从2025年京津冀地区总体来看，维持碳平衡所需标准生态用地面积小于现有标准生态用地面积，说明不需要再另外增加面积。但分省（市）来看，北京、河北的生态用地面积均能够满足碳氧平衡需要，而天津还应增加标准生态用地，方能满足市内维持碳氧平衡的需要。在实际社会和经济发展过程中生态用地面积会略有调整，而且生态用地结构和质量也会发生变化，因此在实际生产和科研中，应根据每年生态用地的实际变化量来逐步修正。
Abstract:According to the data of Beijing-Tianjin-Hebei region in 2020, the carbon release and oxygen consumption, and carbon fixation and oxygen release in 2020 were calculated, and the carbon release and oxygen consumption, carbon fixation and oxygen release, as well as the demand area of ecological land in 2025 were calculated. The results showed that the carbon release and oxygen consumption in Beijing-Tianjin-Hebei region in 2020 were 125.5761 million tons and 143.5337 million tons, respectively, and in 2025, they would be 135.957 0 million tons and 163.392 0 million tons. In 2025, the required standard ecological land area to maintain carbon balance in Beijing-Tianjin-Hebei region was smaller than the existing standard ecological land area, indicating that there was no need to increase the area. However, from the perspective of different provinces, the ecological land area of Beijing and Hebei could meet the needs of carbon and oxygen balance, but Tianjin should increase the standard ecological land to meet the needs of maintaining carbon and oxygen balance in the city. In the process of actual social and economic development, the area of ecological land would be slightly adjusted, and the structure and quality of ecological land would also change. Therefore, in actual production and scientific research, it should be gradually corrected according to the actual annual change of ecological land.
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Key words:
- ecosystem /
- carbon-oxygen balance /
- ecological land /
- Beijing-Tianjin-Hebei region
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图 2 2025年京津冀地区耗氧量
Figure 2. Oxygen consumption in Beijing-Tianjin-Hebei region in 2025
表 1 生态用地单位面积固碳释氧量和折算系数
Table 1. Carbon fixation and oxygen release amount and conversion coefficient of ecological land per unit area
t/(hm2·a) 生态用地 生物量 固碳量 释氧量 折算标准生态用地系数 耕地 15.25 6.83 18.30 0.75 园地 9.20 4.14 11.04 0.45 林地 20.45 9.47 24.07 1.00 草地 7.65 3.44 9.18 0.37 湿地 10.00 4.50 12.00 0.49 
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表 2 不同能源燃烧释碳量
Table 2. Carbon release from combustion of different energy sources
万t 地区 煤炭 焦炭 原油 汽油 煤油 柴油 燃料 天然气 合计 北京 347.4 0.0 2 829.9 1 465.2 2105.9 501.1 1.5 4 095.2 11 346.2 天津 7 156.7 2 585.8 5 114.3 832.1 333.7 981.2 158.8 2 391.6 19 554.2 河北 54 611.7 2 6807.1 6 576.6 1 237.9 97.1 1 438.0 329.5 3 578.0 94 675.9 合计 62 115.8 29 392.9 14 520.8 3 535.2 2 536.7 2 920.3 489.8 10 064.8 125 576.3
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表 3 不同能源燃烧耗氧量
Table 3. Oxygen consumption by different energy sources
万t 地区 煤炭 焦炭 原油 汽油 煤油 柴油 燃料油 天然气 合计 北京 487.5 0 3 212.5 1 717.4 2 392.5 555.0 1.6 688.7 9 055.2 天津 10 043.0 2 410.6 5 805.8 975.3 379.1 1 086.6 171.4 402.2 21 274.0 河北 76 635.8 24 991.5 7 465.9 1 450.9 110.3 1 592.5 355.8 601.7 113 204.4 合计 87 166.3 27 402.1 16 484.2 4 143.6 2 881.9 3 234.1 528.8 1 692.6 143 533.6
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表 4 固碳量与释氧量需求关系
Table 4. Carbon sequestration related to oxygen demand
万t 省（市） 2025年固碳量 2025年释氧量 应固碳量 预测固碳量 差值 应释氧量 预测释氧量 差值 北京 3 958.1 5 194.3 −1 236.1 3 332.2 13 283.4 −9 951.2 天津 7 152.5 2 003.3 5 149.2 8 208.7 5 268.7 2 939.9 河北 34 208.4 56 782.1 −22 573.7 42 923.1 147 888.2 −104 965.2 合计 45 319.0 63 979.7 −18 660.6 54 464.0 166 440.3 −111 976.5
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表 5 维持碳氧平衡生态用地需求量
Table 5. Ecological land demand for maintaining carbon and oxygen balance
万hm2 省（市） 维持碳平衡标准
生态用地面积维持氧平衡标准
生态用地面积现有标准生态
用地面积维持碳氧平衡应增加最小
标准生态用地面积维持碳氧平衡应增加
最小生态用地面积北京 83.6 27.7 110.1 −26.5 −29.0 天津 151.1 68.2 43.2 107.9 140.4 河北 722.5 356.7 1 217.5 −495.0 −632.4 合计 957.2 452.6 1 370.8 −413.6 −521.0
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