Full
Outline
Jiangsu Province—one of China's major rice-producing regions—was selected as the research area. A high-precision CH4 observation system was established at a height of 50m in Taizhou City, central Jiangsu, and the period from 20th May to 31st October 2023, covering the local rice-growing season, was used for analysis. Paddy CH4 flux was retrieved at a 10d scale by coupling an atmospheric transport model with an optimized inversion framework. The main findings are as follows: (1) The "bottom-up" approach based EDGAR prior inventory exhibited neither distinct temporal variability nor emission peaks for paddy CH4 fluxes, inconsistent with the observed peak emissions during the tillering-booting stage in July~August in Jiangsu, which should be constrained and calibrated by using atmospheric CH4 observations. (2) Inversions revealed that both Taizhou City and Jiangsu Province experienced peak CH4 emissions in early to mid-August, followed by a gradual decline. The peak fluxes reached (966.6 ± 104.6) mg/(m2·d) and (1182.9 ± 128.0) mg/(m2·d), respectively, which were (3.27 ± 0.35) times higher than the prior estimates. (3) Over the entire study period, the posterior mean paddy CH4 flux for Taizhou and Jiangsu were (307.3 ± 40.5) mg CH4/(m2·d) and (376.7 ± 49.7) mg CH4/(m2·d), respectively, (1.37 ± 0.18) times the prior values. These results indicate that the prior inventory substantially underestimated both the magnitude and temporal variation of paddy CH4 emissions.
78
16
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
