New evidence for CH 4 enhancement in the upper troposphere associated with the Asian summer monsoon
Bibliographic Data
| ID | 15550813 |
|---|---|
| Authors | Mengchu Tao (0000-0002-1071-5953, Chinese Academy of Sciences), Zhaonan Cai (Institute of Atmospheric Physics, corresponding author), Sihong Zhu (0000-0003-2340-609X, Chinese Academy of Sciences), Yi Liu (0000-0001-7733-3290, Institute of Atmospheric Physics), Liang Feng (0000-0002-4587-7020, University of Edinburgh), Shuangxi Fang (0000-0002-2104-5721, Zhejiang University of Technology), You Yi (0009-0006-5341-3679, Institute of Atmospheric Physics), Jianchun Bian (0000-0001-8023-0751, Chinese Academy of Sciences) |
| Year | 2024 |
| Volume | 19 |
| Issue | 3 |
| Pages | 034033-034033 |
| Publication date | 2024-02-07 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ad2738 |
| OpenAlex | W4391618494 |
| Language | EN |
| Citations received | 2 |
| References cited | 39 |
The Asian summer monsoon (ASM) region is a key region transporting air to the upper troposphere (UT), significantly influencing the distribution and concentration of trace gases, including methane (CH 4 ), an important greenhouse gas. We investigate the seasonal enhancement of CH 4 in the UT over the ASM region, utilizing retrievals from the Atmospheric Infrared Sounder (AIRS), model simulations and in-situ measurements. Both the AIRS data and model simulation reveal a substantial enhancement in CH 4 concentrations within the active monsoon region of up to 3%, referring to the zonal means, and of up to 6% relative to the pre-monsoon season. Notably, the spatial distribution of the CH 4 plume demonstrates a southwestward shift in the AIRS retrievals, in contrast to the model simulations, which predict a broader enhancement, including a significant increase to the east. A cross-comparison with in-situ measurements, including AirCore measurements over the Tibetan Plateau and airline sampling across the ASM anticyclone (ASMA), favors the enhancement represented by model simulation. Remarkable CH 4 enhancement over the west Pacific is also evidenced by in-situ data and simulation as a dynamical extension of the ASMA. Our findings underscore the necessity for cautious interpretation of satellite-derived CH 4 distributions, and highlight the critical role of in-situ data in anchoring the assimilation of CH 4
Atmospheric sciences · Climatology · East Asian Monsoon · Geography · Meteorology · Monsoon · Troposphere · Atmospheric and Environmental Gas Dynamics · Atmospheric chemistry and aerosols · Atmospheric Ozone and Climate · Environmental Science · Geology
| Citations per year | 2 |
|---|---|
| Citation span | 2025 - 2026 (2) |
| Highly cited | No |