Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system
<p>An updated version of the Weather Research and Forecast model coupled with Chemistry (WRF-Chem) was applied to quantify and investigate the full effects of dust on the meteorological field over East Asia during March and April 2012. The performances of the model in simulating the shortwa...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-08-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/11529/2018/acp-18-11529-2018.pdf |
| _version_ | 1818188364735578112 |
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| author | L. Su J. C. H. Fung J. C. H. Fung |
| author_facet | L. Su J. C. H. Fung J. C. H. Fung |
| author_sort | L. Su |
| collection | DOAJ |
| description | <p>An updated version of the Weather Research and Forecast model coupled with
Chemistry (WRF-Chem) was applied to quantify and investigate the full effects
of dust on the meteorological field over East Asia during March and April
2012. The performances of the model in simulating the shortwave and
longwave radiation, surface temperature, and precipitation over East Asia
are improved by incorporating the effects of dust in the simulations. The
radiative forcing induced by the direct radiative effect of dust is greater
than that by the dust-enhanced cloud radiative effect. The indirect effects
of dust result in a substantial increase in ice clouds at the middle to upper
troposphere and a reduction in liquid clouds at the low to mid-troposphere. The
radiative forcing combined with the redistribution of atmospheric water
vapor results in an overall decrease in near-surface temperature and an
increase in temperature at the middle to upper troposphere over East Asia,
leading to an inhibition of atmospheric instability over most land areas, but
an enhancement of atmospheric instability over south China. Upon considering
the effects of dust, convective precipitation exhibits an inhibition over
areas from central to east China and an enhancement over south China.
Meanwhile, the locations of non-convective precipitation are shifted due to
the perturbation of cloud water path. The total amount of precipitation over
East Asia remains unchanged; however, the precipitation locations are
shifted. The precipitation can be enhanced or inhibited by up to 20 % at
particular areas.</p> |
| first_indexed | 2024-12-11T23:25:45Z |
| format | Article |
| id | doaj.art-7b638bee44ba4acbb9bba55498a5a719 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T23:25:45Z |
| publishDate | 2018-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-7b638bee44ba4acbb9bba55498a5a7192022-12-22T00:46:12ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-08-0118115291154510.5194/acp-18-11529-2018Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather systemL. Su0J. C. H. Fung1J. C. H. Fung2School of Science, Hong Kong University of Science and Technology, Hong Kong, ChinaDivision of Environment, Hong Kong University of Science and Technology, Hong Kong, ChinaDepartment of Mathematics, Hong Kong University of Science and Technology, Hong Kong, China<p>An updated version of the Weather Research and Forecast model coupled with Chemistry (WRF-Chem) was applied to quantify and investigate the full effects of dust on the meteorological field over East Asia during March and April 2012. The performances of the model in simulating the shortwave and longwave radiation, surface temperature, and precipitation over East Asia are improved by incorporating the effects of dust in the simulations. The radiative forcing induced by the direct radiative effect of dust is greater than that by the dust-enhanced cloud radiative effect. The indirect effects of dust result in a substantial increase in ice clouds at the middle to upper troposphere and a reduction in liquid clouds at the low to mid-troposphere. The radiative forcing combined with the redistribution of atmospheric water vapor results in an overall decrease in near-surface temperature and an increase in temperature at the middle to upper troposphere over East Asia, leading to an inhibition of atmospheric instability over most land areas, but an enhancement of atmospheric instability over south China. Upon considering the effects of dust, convective precipitation exhibits an inhibition over areas from central to east China and an enhancement over south China. Meanwhile, the locations of non-convective precipitation are shifted due to the perturbation of cloud water path. The total amount of precipitation over East Asia remains unchanged; however, the precipitation locations are shifted. The precipitation can be enhanced or inhibited by up to 20 % at particular areas.</p>https://www.atmos-chem-phys.net/18/11529/2018/acp-18-11529-2018.pdf |
| spellingShingle | L. Su J. C. H. Fung J. C. H. Fung Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system Atmospheric Chemistry and Physics |
| title | Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system |
| title_full | Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system |
| title_fullStr | Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system |
| title_full_unstemmed | Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system |
| title_short | Investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over East Asia – Part 2: modification of the weather system |
| title_sort | investigating the role of dust in ice nucleation within clouds and further effects on the regional weather system over east asia part 2 modification of the weather system |
| url | https://www.atmos-chem-phys.net/18/11529/2018/acp-18-11529-2018.pdf |
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