Model analysis of soil dust impacts on the boundary layer meteorology and air quality over East Asia in April 2015

Cycling and Budgets of Organic and Black Carbon in Coastal Bohai Sea, China: Impacts of Natural and Anthropogenic Perturbations

“…Dust storms are a typical natural weather event in northern China in spring (March–May). During the spring 2015 atmospheric deposition sampling campaign, China's National Weather Bureau recorded two major dust episodes, which circulated over northern China and the BS on 28–31 March and 15–16 April, respectively (Chen et al, ; Wang et al, ). During these two events, the PM concentrations in Bohai Rim were extremely high.…”

“…Based on observations conducted in Beijing, ~150 km upwind from the nearest BS coastline (Figure a), during the first dust event on 28 March, mass concentrations of particles with an aerodynamic diameter ≤10 μm (PM 10 ) reached a maximum of 800 μg/m 3 . The hourly PM 10 mass concentration exceeded 1,000 μg/m 3 during the second dust event on 16 April, which was regarded as the worst sandstorm event over the past decade, despite persisting for only 2 days (Chen et al, ).…”

“…Studies using numerical modeling and backward trajectory analysis showed that the dust in spring 2015 was composed primarily of mineral particles from the arid and semiarid desert regions of Mongolia and western and northern China. The dust was transported to the BS by a strong northwesterly wind (>10 m/s) (Chen et al, ; Wang et al, ). The Inner Mongolia Autonomous Region of China is estimated to be responsible for approximately 31% of the total Asian dust yield (Zhang et al, ).…”

“…Significant amounts of the anthropogenic OC and BC are readily transported to the coastal Bohai Sea (BS) and subsequently participate in the coastal BS carbon cycle, owing to the combined influences of the northwesterly prevailing winter, spring East Asian monsoon, and high riverine discharge, including that of the Yellow River, which yields the world's second largest riverine sediment flux into the ocean (Hu et al, ). Concurrently, extreme natural weather events, such as frequent and intense spring dust storms that occur in northern China (Chen et al, ; Wang et al, ), can deliver dust particles and particle‐bound OC and BC into the BS following long‐range transport. Tan et al () reported that the total deposition of dust particles for the days on which dust storms affected Chinese seas was ~36 million tons, which was equivalent to ~5% of the total emission of spring dust storms in Inner Mongolia during 2000–2007.…”

Modeling Impacts of Urbanization and Urban Heat Island Mitigation on Boundary Layer Meteorology and Air Quality in Beijing Under Different Weather Conditions

“…For instance, UHI based on land surface temperature (LST) measurements can be obtained from remote sensors (Lazzarini et al, ; Owen et al, ; Shen et al, ; Zhou et al, ). However, coarse temporal resolutions, classification uncertainties in underlying surface types, and impacts of clouds and aerosols during rainy seasons or over heavy polluted regions may generate large biases (Chen, Zhang, Zhu, et al, ; Reynolds et al, ; Xie et al, ).…”