Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China
Atmospheric column-averaged methane (XCH4) observations from GOSAT are analyzed to study the spatiotemporal variation of XCH4 in China. Furthermore, we investigate the driving mechanism of XCH4 spatiotemporal variations, especially for high XCH4 values shown over Sichuan Basin, by analyzing both the...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2015/125059 |
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| author | Xiuchun Qin Liping Lei Zhonghua He Zhao-Cheng Zeng Masahiro Kawasaki Masafumi Ohashi Yutaka Matsumi |
| author_facet | Xiuchun Qin Liping Lei Zhonghua He Zhao-Cheng Zeng Masahiro Kawasaki Masafumi Ohashi Yutaka Matsumi |
| author_sort | Xiuchun Qin |
| collection | DOAJ |
| description | Atmospheric column-averaged methane (XCH4) observations from GOSAT are analyzed to study the spatiotemporal variation of XCH4 in China. Furthermore, we investigate the driving mechanism of XCH4 spatiotemporal variations, especially for high XCH4 values shown over Sichuan Basin, by analyzing both the emission mechanism of rice planting process and the regional atmosphere dynamic transportation. The results indicate that spatially the Sichuan Basin presents a higher XCH4 concentration than other regions in China and is 17 ppb higher than the paddy area in the same latitude zone. Seasonally, XCH4 in Sichuan Basin during rice harvest season is generally higher than that in early cultivation period. However, comparing to paddy area in the same latitude zone, Sichuan Basin shows a relatively higher XCH4 value during the winter of noncultivation period when the emissions from rice paddies are weak and surface air temperature is low. To further investigate the high XCH4 concentration during this low-emission period, we use the HYSPLIT model to simulate the atmosphere dynamic transport process, and the result suggests that the typical closed topography of Sichuan Basin, which may lead to CH4 accumulation and keep it from diffusion, is one possible reason for the high XCH4 value in winter. |
| format | Article |
| id | doaj-art-8cb4858715f94cbaaa766c9939c58ad7 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-8cb4858715f94cbaaa766c9939c58ad72025-02-03T01:26:11ZengWileyAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/125059125059Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in ChinaXiuchun Qin0Liping Lei1Zhonghua He2Zhao-Cheng Zeng3Masahiro Kawasaki4Masafumi Ohashi5Yutaka Matsumi6Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, ChinaNagoya University, Nagoya 890-0065, JapanKagoshima University, Kagoshima 464-8601, JapanNagoya University, Nagoya 890-0065, JapanAtmospheric column-averaged methane (XCH4) observations from GOSAT are analyzed to study the spatiotemporal variation of XCH4 in China. Furthermore, we investigate the driving mechanism of XCH4 spatiotemporal variations, especially for high XCH4 values shown over Sichuan Basin, by analyzing both the emission mechanism of rice planting process and the regional atmosphere dynamic transportation. The results indicate that spatially the Sichuan Basin presents a higher XCH4 concentration than other regions in China and is 17 ppb higher than the paddy area in the same latitude zone. Seasonally, XCH4 in Sichuan Basin during rice harvest season is generally higher than that in early cultivation period. However, comparing to paddy area in the same latitude zone, Sichuan Basin shows a relatively higher XCH4 value during the winter of noncultivation period when the emissions from rice paddies are weak and surface air temperature is low. To further investigate the high XCH4 concentration during this low-emission period, we use the HYSPLIT model to simulate the atmosphere dynamic transport process, and the result suggests that the typical closed topography of Sichuan Basin, which may lead to CH4 accumulation and keep it from diffusion, is one possible reason for the high XCH4 value in winter.http://dx.doi.org/10.1155/2015/125059 |
| spellingShingle | Xiuchun Qin Liping Lei Zhonghua He Zhao-Cheng Zeng Masahiro Kawasaki Masafumi Ohashi Yutaka Matsumi Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China Advances in Meteorology |
| title | Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China |
| title_full | Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China |
| title_fullStr | Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China |
| title_full_unstemmed | Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China |
| title_short | Preliminary Assessment of Methane Concentration Variation Observed by GOSAT in China |
| title_sort | preliminary assessment of methane concentration variation observed by gosat in china |
| url | http://dx.doi.org/10.1155/2015/125059 |
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