Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers
<p>The Tibetan Plateau significantly impacts regional and global climate systems due to its unique geographical location and complex environmental processes. This study investigates the variability and driving force of transboundary transport flux of carbon monoxide (CO) over the Tibetan Plate...
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Copernicus Publications
2025-07-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/25/6823/2025/acp-25-6823-2025.pdf |
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| author | Z. Sun H. Yin Z. Pan C. Li X. Lu K. Liu Y. Sun Y. Sun C. Liu C. Liu C. Liu C. Liu |
| author_facet | Z. Sun H. Yin Z. Pan C. Li X. Lu K. Liu Y. Sun Y. Sun C. Liu C. Liu C. Liu C. Liu |
| author_sort | Z. Sun |
| collection | DOAJ |
| description | <p>The Tibetan Plateau significantly impacts regional and global climate systems due to its unique geographical location and complex environmental processes. This study investigates the variability and driving force of transboundary transport flux of carbon monoxide (CO) over the Tibetan Plateau from May 2018–April 2024. The CO fluxes were calculated with a closed-loop integral method using the TROPOMI, ERA5, and GEOS-CF data products. The results show that the external influx and internal efflux of CO over the Tibetan Plateau in each year are relatively close and have similar seasonal characteristics. High levels of CO flux occur in late autumn to winter, and low levels occur in summer. In most cases, CO flux maximizes in November, December, or January and minimizes in July or August. The month-to-month variability during late autumn to winter is greater than that in summer. The Tibetan Plateau has experienced an increase of 2.86 <span class="inline-formula">Tg CO yr<sup>−1</sup></span> in external influx, while the internal efflux has slightly decreased by <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">1.70</mn><mspace linebreak="nobreak" width="0.125em"/><mrow class="unit"><mi mathvariant="normal">Tg</mi><mspace width="0.125em" linebreak="nobreak"/><mi mathvariant="normal">CO</mi><mspace linebreak="nobreak" width="0.125em"/><msup><mi mathvariant="normal">yr</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="83pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="7332a9d0e3e467d46eccb7681ee1c54c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-6823-2025-ie00001.svg" width="83pt" height="15pt" src="acp-25-6823-2025-ie00001.png"/></svg:svg></span></span>. The magnitude of the increase in external influx in the southwestern segment is greater than in the northeastern segment. Conversely, the magnitude of the decrease in internal efflux in the northeastern segment is greater than in the southwestern segment. The source attribution results reveal that the external input of CO into the Tibetan Plateau mainly comes from South Asia. The increase in external influx of CO in recent years over the Tibetan Plateau is potentially linked to the rapid rise in CO concentrations from South Asia.</p> |
| format | Article |
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| institution | DOAJ |
| issn | 1680-7316 1680-7324 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Copernicus Publications |
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| series | Atmospheric Chemistry and Physics |
| spelling | doaj-art-d8a6629e8c224f2e88f679437d5158012025-08-20T03:16:08ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242025-07-01256823684210.5194/acp-25-6823-2025Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and driversZ. Sun0H. Yin1Z. Pan2C. Li3X. Lu4K. Liu5Y. Sun6Y. Sun7C. Liu8C. Liu9C. Liu10C. Liu11School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, ChinaSchool of Energy and Environment, City University of Hong Kong, Hong Kong SAR, ChinaInstitutes of Physical Science and Information Technology, Anhui University, Hefei 230601, ChinaSchool of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, ChinaSchool of Atmospheric Sciences, Sun Yat-Sen University, Zhuhai 519082, ChinaState Grid Shanxi Electric Power Company, Marketing Service Center, Taiyuan 030021, ChinaSchool of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, ChinaKey Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaDepartment of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, ChinaCenter for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaKey Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230026, ChinaAnhui Province Key Laboratory of Polar Environment and Global Change, USTC, Hefei 230026, China<p>The Tibetan Plateau significantly impacts regional and global climate systems due to its unique geographical location and complex environmental processes. This study investigates the variability and driving force of transboundary transport flux of carbon monoxide (CO) over the Tibetan Plateau from May 2018–April 2024. The CO fluxes were calculated with a closed-loop integral method using the TROPOMI, ERA5, and GEOS-CF data products. The results show that the external influx and internal efflux of CO over the Tibetan Plateau in each year are relatively close and have similar seasonal characteristics. High levels of CO flux occur in late autumn to winter, and low levels occur in summer. In most cases, CO flux maximizes in November, December, or January and minimizes in July or August. The month-to-month variability during late autumn to winter is greater than that in summer. The Tibetan Plateau has experienced an increase of 2.86 <span class="inline-formula">Tg CO yr<sup>−1</sup></span> in external influx, while the internal efflux has slightly decreased by <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">1.70</mn><mspace linebreak="nobreak" width="0.125em"/><mrow class="unit"><mi mathvariant="normal">Tg</mi><mspace width="0.125em" linebreak="nobreak"/><mi mathvariant="normal">CO</mi><mspace linebreak="nobreak" width="0.125em"/><msup><mi mathvariant="normal">yr</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="83pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="7332a9d0e3e467d46eccb7681ee1c54c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-25-6823-2025-ie00001.svg" width="83pt" height="15pt" src="acp-25-6823-2025-ie00001.png"/></svg:svg></span></span>. The magnitude of the increase in external influx in the southwestern segment is greater than in the northeastern segment. Conversely, the magnitude of the decrease in internal efflux in the northeastern segment is greater than in the southwestern segment. The source attribution results reveal that the external input of CO into the Tibetan Plateau mainly comes from South Asia. The increase in external influx of CO in recent years over the Tibetan Plateau is potentially linked to the rapid rise in CO concentrations from South Asia.</p>https://acp.copernicus.org/articles/25/6823/2025/acp-25-6823-2025.pdf |
| spellingShingle | Z. Sun H. Yin Z. Pan C. Li X. Lu K. Liu Y. Sun Y. Sun C. Liu C. Liu C. Liu C. Liu Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers Atmospheric Chemistry and Physics |
| title | Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers |
| title_full | Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers |
| title_fullStr | Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers |
| title_full_unstemmed | Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers |
| title_short | Quantifying transboundary transport flux of CO over the Tibetan Plateau: variabilities and drivers |
| title_sort | quantifying transboundary transport flux of co over the tibetan plateau variabilities and drivers |
| url | https://acp.copernicus.org/articles/25/6823/2025/acp-25-6823-2025.pdf |
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