Abstract
Korea has occasionally suffered from various kinds of severe hazes such as long-range transported aerosol (LH), yellow sand (YS), and urban haze (UH). We classified haze days into LH, YS, and UH and analyzed the characteristics of its associated meteorological conditions for 2011–2016 using reanalysis data and surface observations. The results show that higher boundary layer height and stronger wind speed were found for the LH and YS hazes relative to those for UH. Intensive analysis on a golden episode of 10–18 January 2013 indicates that the cloud fraction increased along with extended light precipitation at a weaker rate by enhanced aerosol loading for an unprecedented LH event, which in turn brought about a decrease in boundary layer height (BLH) with less irradiance, that is, much stronger stability. Later, the intensified stability after the LH event accumulated and increased domestic aerosols, and eventually resulted in the longer-lasting severe haze. This study suggests that aerosol–meteorology interactions play an important role in both short-term weather and fine particle forecasts, especially on polluted days.
Highlights
Korea has occasionally suffered from serious haze events, which generally consist of various air pollutants accompanied by visibility degradation
The analysis is limited to one single episode, and it is certain that the inherent coherence of just aerosol and meteorology withhas the lots synoptic dependenceto cannot
Aerosolquite a long lifetime could be explained as an advertent weather modification experiment cloud–precipitation interactions have been examined and discussed in accordance with applied to Korea, when aerosol–meteorology are well represented by bothemthe the meteorological conditions modified by aninteractions external aerosol forcing, with a special observation reanalysis data inof the10relatively weak2013
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. We intend to understand aerosol–meteorology interactions by first examining aerosols’ effect on meteorology and in turn meteorology’s effect on aerosols For this purpose, the analysis is based on a golden episode of the January 2013 severe haze, when unprecedented aerosol loadings lasted largely for a week. The Atmosphere 2021, 12, 33 serious haze had occurred a couple of days before in the Beijing area, China, with PM2.5 concentrations exceeding 600 μg m−3 This episode would provide us with a better testbed to examine enhanced aerosol impacts on meteorology and, in turn, the modified meteorology impacts on aerosols. This kind of intensive analysis on the special episode would contribute to enlightening aerosol–cloud–precipitation interactions and further improving both short-term weather and fine particle forecasts especially on the polluted days
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