The Impacts of Different PBL Schemes on the Simulation of PM2.5 during Severe Haze Episodes in the Jing-Jin-Ji Region and Its Surroundings in China
Item
Title (Dublin Core)
The Impacts of Different PBL Schemes on the Simulation of PM2.5 during Severe Haze Episodes in the Jing-Jin-Ji Region and Its Surroundings in China
Description (Dublin Core)
In this study, three schemes [Yonsei University (YSU), Mellor-Yamada-Janjic (MYJ), and Bougeault-Lacarrère (Boulac)] were employed in the Weather Research and Forecasting/Chemistry (WRF-Chem) model to simulate the severe haze that occurred in February 2014 in the Jing-Jin-Ji region and its surroundings. The PM2.5 concentration simulated using the three schemes, together with the meteorological factors closely related to PM2.5 (wind speed, local vertical diffusivity, and PBL height), was evaluated through comparison with observations. The results indicated that the eastern plain cities produced better simulation results than the western cities, and the cities under the eastern root of Taihang Mountain produced the worst results in simulating high PM2.5 concentration in haze. All three schemes simulated very similar variation trends of the surface PM2.5 concentration compared with observations. The diurnal variations of simulated surface PM2.5 were not as reasonable as their reflection of daily averaged variation. The simulated concentrations of surface PM2.5 using the YSU, MYJ, and Boulac schemes all showed large negative errors during daytime in polluted days due to their inefficient descriptions of local atmospheric stability or diffusion processes in haze. The lower ability of PBL schemes in distinguishing the diffusion between haze and clean days in the complex topography areas in China is an important problem for PM2.5 forecasting, which is worthy of being studied in detail.
Creator (Dublin Core)
Tian Li
Hong Wang
Tianliang Zhao
Min Xue
Yaqiang Wang
Huizheng Che
Chao Jiang
Subject (Dublin Core)
Meteorology. Climatology
QC851-999
Publisher (Dublin Core)
Hindawi Limited
Date (Dublin Core)
2016-01-01T00:00:00Z
Type (Dublin Core)
article
Identifier (Dublin Core)
1687-9309
1687-9317
10.1155/2016/6295878
https://doaj.org/article/2e3a535c3a6244d59e59b3b217f36290
Source (Dublin Core)
Advances in Meteorology, Vol 2016 (2016)
Language (Dublin Core)
EN
Relation (Dublin Core)
http://dx.doi.org/10.1155/2016/6295878
https://doaj.org/toc/1687-9309
https://doaj.org/toc/1687-9317
Provenance (Dublin Core)
Journal Licence: CC BY