Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter
The canonical view of the northeast Asian anomalous anticyclone (NAAA) is a crucial factor for determining poor air quality (i.e., higher particulate matter, PM 2.5 concentrations) in the North China Plain (NCP) on the interannual timescale. However, there is considerable intraseasonal variability i...
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ftdoajarticles:oai:doaj.org/article:9082e945628642368e0b362a65cba1cd 2023-05-15T17:36:50+02:00 Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter X. An W. Chen P. Hu S. Chen L. Sheng 2022-05-01T00:00:00Z https://doi.org/10.5194/acp-22-6507-2022 https://doaj.org/article/9082e945628642368e0b362a65cba1cd EN eng Copernicus Publications https://acp.copernicus.org/articles/22/6507/2022/acp-22-6507-2022.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-22-6507-2022 1680-7316 1680-7324 https://doaj.org/article/9082e945628642368e0b362a65cba1cd Atmospheric Chemistry and Physics, Vol 22, Pp 6507-6521 (2022) Physics QC1-999 Chemistry QD1-999 article 2022 ftdoajarticles https://doi.org/10.5194/acp-22-6507-2022 2022-12-31T02:31:37Z The canonical view of the northeast Asian anomalous anticyclone (NAAA) is a crucial factor for determining poor air quality (i.e., higher particulate matter, PM 2.5 concentrations) in the North China Plain (NCP) on the interannual timescale. However, there is considerable intraseasonal variability in the NAAA in early winter (November–January), and the corresponding mechanism of its impacts on PM 2.5 pollution in the NCP is not well understood. Here, we find that the intraseasonal NAAA usually establishes quickly on day 3 prior to its peak day with a duration of 8 d, and its evolution is closely tied to the Rossby wave from upstream (i.e., the North Atlantic). Moreover, we find that the NAAA with a westward tilt might be mainly related to the wavenumbers 3–4. Further results reveal that against this background, the probability of regional PM 2.5 pollution for at least 3 d in the NCP is as high as 69 % (80 % at least 2 d) in the Nov–Jan (NDJ) period 2000–2021. In particular, air quality in the NCP tends to deteriorate on day 2 prior to the peak day and reaches a peak on the next day with a life cycle of 4 d. In the course of PM 2.5 pollution, a shallower atmospheric boundary layer and stronger surface southerly wind anomaly associated with the NAAA in the NCP appear 1 d earlier than poor air quality, which provides dynamic and thermal conditions for the accumulation of pollutants and finally occurrence of the PM 2.5 pollution on the following day. Furthermore, we show that the stagnant air leading to poor air quality is determined by the special structure of temperature in the vertical direction of the NAAA, while weak ventilation conditions might be related to a rapid build-up of the NAAA. The present results quantify the impact of the NAAA on PM 2.5 pollution in the NCP on the intraseasonal timescale. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Atmospheric Chemistry and Physics 22 10 6507 6521 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 X. An W. Chen P. Hu S. Chen L. Sheng Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
The canonical view of the northeast Asian anomalous anticyclone (NAAA) is a crucial factor for determining poor air quality (i.e., higher particulate matter, PM 2.5 concentrations) in the North China Plain (NCP) on the interannual timescale. However, there is considerable intraseasonal variability in the NAAA in early winter (November–January), and the corresponding mechanism of its impacts on PM 2.5 pollution in the NCP is not well understood. Here, we find that the intraseasonal NAAA usually establishes quickly on day 3 prior to its peak day with a duration of 8 d, and its evolution is closely tied to the Rossby wave from upstream (i.e., the North Atlantic). Moreover, we find that the NAAA with a westward tilt might be mainly related to the wavenumbers 3–4. Further results reveal that against this background, the probability of regional PM 2.5 pollution for at least 3 d in the NCP is as high as 69 % (80 % at least 2 d) in the Nov–Jan (NDJ) period 2000–2021. In particular, air quality in the NCP tends to deteriorate on day 2 prior to the peak day and reaches a peak on the next day with a life cycle of 4 d. In the course of PM 2.5 pollution, a shallower atmospheric boundary layer and stronger surface southerly wind anomaly associated with the NAAA in the NCP appear 1 d earlier than poor air quality, which provides dynamic and thermal conditions for the accumulation of pollutants and finally occurrence of the PM 2.5 pollution on the following day. Furthermore, we show that the stagnant air leading to poor air quality is determined by the special structure of temperature in the vertical direction of the NAAA, while weak ventilation conditions might be related to a rapid build-up of the NAAA. The present results quantify the impact of the NAAA on PM 2.5 pollution in the NCP on the intraseasonal timescale. |
format |
Article in Journal/Newspaper |
author |
X. An W. Chen P. Hu S. Chen L. Sheng |
author_facet |
X. An W. Chen P. Hu S. Chen L. Sheng |
author_sort |
X. An |
title |
Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
title_short |
Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
title_full |
Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
title_fullStr |
Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
title_full_unstemmed |
Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM 2.5 pollution in the North China Plain in early winter |
title_sort |
intraseasonal variation of the northeast asian anomalous anticyclone and its impacts on pm 2.5 pollution in the north china plain in early winter |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/acp-22-6507-2022 https://doaj.org/article/9082e945628642368e0b362a65cba1cd |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmospheric Chemistry and Physics, Vol 22, Pp 6507-6521 (2022) |
op_relation |
https://acp.copernicus.org/articles/22/6507/2022/acp-22-6507-2022.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-22-6507-2022 1680-7316 1680-7324 https://doaj.org/article/9082e945628642368e0b362a65cba1cd |
op_doi |
https://doi.org/10.5194/acp-22-6507-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
10 |
container_start_page |
6507 |
op_container_end_page |
6521 |
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1766136457707126784 |