Aerosol concentrations variability over China: two distinct leading modes
Understanding the variability in aerosol concentrations (ACs) over China is a scientific challenge and is of practical importance. The present study explored the month-to-month variability in ACs over China based on simulations of an atmospheric chemical transport model with a fixed emissions level....
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-20-9883-2020 https://doaj.org/article/4936a9fd81744a27abe74d7ab734b73b |
id |
ftdoajarticles:oai:doaj.org/article:4936a9fd81744a27abe74d7ab734b73b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:4936a9fd81744a27abe74d7ab734b73b 2023-05-15T17:35:02+02:00 Aerosol concentrations variability over China: two distinct leading modes J. Feng J. Zhu J. Li H. Liao 2020-08-01T00:00:00Z https://doi.org/10.5194/acp-20-9883-2020 https://doaj.org/article/4936a9fd81744a27abe74d7ab734b73b EN eng Copernicus Publications https://acp.copernicus.org/articles/20/9883/2020/acp-20-9883-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-9883-2020 1680-7316 1680-7324 https://doaj.org/article/4936a9fd81744a27abe74d7ab734b73b Atmospheric Chemistry and Physics, Vol 20, Pp 9883-9893 (2020) Physics QC1-999 Chemistry QD1-999 article 2020 ftdoajarticles https://doi.org/10.5194/acp-20-9883-2020 2023-01-08T01:40:27Z Understanding the variability in aerosol concentrations (ACs) over China is a scientific challenge and is of practical importance. The present study explored the month-to-month variability in ACs over China based on simulations of an atmospheric chemical transport model with a fixed emissions level. The month-to-month variability in ACs over China is dominated by two principal modes: the first leading monopole mode and the second meridional dipole mode. The monopole mode mainly indicates enhanced ACs over eastern China, and the dipole mode displays a south–north out-of-phase pattern. The two leading modes are associated with different climatic systems. The monopole mode relates to the 3 months leading the El Niño–Southern Oscillation (ENSO), while the dipole mode connects with the simultaneous variation in the North Atlantic Oscillation (NAO) or the Northern Hemisphere Annular Mode (NAM). The associated anomalous dynamic and thermal impacts of the two climatic variabilities are examined to explain their contributions to the formation of the two modes. For the monopole mode, the preceding ENSO is associated with anomalous convergence, decreased planetary boundary layer height (PBLH), and negative temperature anomalies over eastern China, which are unfavorable for emissions. For the dipole mode, the positive NAO is accompanied by opposite anomalies in the convergence, PBLH, and temperature over southern and northern China, paralleling the spatial formation of the mode. This result suggests that the variations originating from the tropical Pacific and extratropical atmospheric systems contribute to the dominant variabilities of ACs over China. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Pacific Atmospheric Chemistry and Physics 20 16 9883 9893 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 J. Feng J. Zhu J. Li H. Liao Aerosol concentrations variability over China: two distinct leading modes |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Understanding the variability in aerosol concentrations (ACs) over China is a scientific challenge and is of practical importance. The present study explored the month-to-month variability in ACs over China based on simulations of an atmospheric chemical transport model with a fixed emissions level. The month-to-month variability in ACs over China is dominated by two principal modes: the first leading monopole mode and the second meridional dipole mode. The monopole mode mainly indicates enhanced ACs over eastern China, and the dipole mode displays a south–north out-of-phase pattern. The two leading modes are associated with different climatic systems. The monopole mode relates to the 3 months leading the El Niño–Southern Oscillation (ENSO), while the dipole mode connects with the simultaneous variation in the North Atlantic Oscillation (NAO) or the Northern Hemisphere Annular Mode (NAM). The associated anomalous dynamic and thermal impacts of the two climatic variabilities are examined to explain their contributions to the formation of the two modes. For the monopole mode, the preceding ENSO is associated with anomalous convergence, decreased planetary boundary layer height (PBLH), and negative temperature anomalies over eastern China, which are unfavorable for emissions. For the dipole mode, the positive NAO is accompanied by opposite anomalies in the convergence, PBLH, and temperature over southern and northern China, paralleling the spatial formation of the mode. This result suggests that the variations originating from the tropical Pacific and extratropical atmospheric systems contribute to the dominant variabilities of ACs over China. |
format |
Article in Journal/Newspaper |
author |
J. Feng J. Zhu J. Li H. Liao |
author_facet |
J. Feng J. Zhu J. Li H. Liao |
author_sort |
J. Feng |
title |
Aerosol concentrations variability over China: two distinct leading modes |
title_short |
Aerosol concentrations variability over China: two distinct leading modes |
title_full |
Aerosol concentrations variability over China: two distinct leading modes |
title_fullStr |
Aerosol concentrations variability over China: two distinct leading modes |
title_full_unstemmed |
Aerosol concentrations variability over China: two distinct leading modes |
title_sort |
aerosol concentrations variability over china: two distinct leading modes |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-9883-2020 https://doaj.org/article/4936a9fd81744a27abe74d7ab734b73b |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Atmospheric Chemistry and Physics, Vol 20, Pp 9883-9893 (2020) |
op_relation |
https://acp.copernicus.org/articles/20/9883/2020/acp-20-9883-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-9883-2020 1680-7316 1680-7324 https://doaj.org/article/4936a9fd81744a27abe74d7ab734b73b |
op_doi |
https://doi.org/10.5194/acp-20-9883-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
16 |
container_start_page |
9883 |
op_container_end_page |
9893 |
_version_ |
1766134072801755136 |