PDF
Full
Outline
As one of the major greenhouse gases in the atmosphere, the spatial distribution characteristics of Methane（CH4）were the main content of climate research. However, differences were observed between the methane column concentration（XCH4）data from multiple satellite sources. A systematic evaluation of these differences was conducted to improve the accuracy of its scientific application. The XCH4 products obtained by the Greenhouse Gases Observing Satellite（GOSAT）and the Tropospheric Monitoring Instrument（TROPOMI）from March 2019 to February 2023 were compared and analyzed, and the Total Carbon Column Observing Network（TCCON）data were used for evaluation. The results showed that the two satellites shared the following common characteristics: XCH4 was higher near the equator and decreased towards the poles, with XCH4 values in the northern hemisphere generally being higher than those in the southern hemisphere; In the interannual variation, the fluctuation range in the southern hemisphere was larger, reaching ±15×10-9; Seasonal variation was characterized by lower values in summer and higher values in winter. The differences were as follows: The data volume of TROPOMI was found to be 1300 times greater than that of GOSAT; The annual average growth rates of GOSAT in North America and Africa（13.08×10-9/a and 13.92×10-9/a）were slightly lower than those of TROPOMI（13.34×10-9/a and 14.12×10-9/a）, while the interannual amplitude in South America（16.10×10-9/a）was found to be larger. The XCH4 difference between the two satellites in summer was found to be the largest, with a measurement of -5.00×10-9. Verification and analysis with TCCON data showed that both satellites exhibited high consistency, although errors were also observed. Specifically, the differences between TCCON and GOSAT and TROPOMI were -7.61×10-9（-4.59×10-9 and -4.63×10-9 in the northern and southern hemispheres, respectively）and -5.03×10-9（-6.70×10-9 and 0.18×10-9 in the northern and southern hemispheres, respectively）.
PDF
56
29
| 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
010-62199257
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
