Ozone pollution aggravated by mountain-valley breeze over the western Sichuan Basin, Southwest China.

The impact of thermally driven mountain-valley breezes (MVB) on the atmospheric environment remains poorly understood, especially in ozone (O)-polluted regions with complex underlying topography. To address this knowledge gap, we focused on the western Sichuan Basin (SCB), situated immediately east of the Tibetan Plateau (TP), which is considered susceptible to MVB coupled with severe O pollution in southwest China. We revealed the MVB driving diurnal O variations and meteorological mechanisms using surface observations and ERA5 reanalysis data.

Recent-year variations in O pollution with high-temperature suppression over central China.

By analyzing environmental and meteorological monitoring data over recent years of 2015-2022, the Twain-Hu Basin (THB) in central China was identified as a regional O pollution center over China with the highest increasing trend at 1.10 %⸱yr in interannual variations of O concentrations with deteriorating O pollution over recent years. We explored the spatiotemporal variations in O pollution in the THB with ozone suppression (OS) under high air temperature over metropolitan, small urban, and mountainous areas.

Interannual variations in ozone pollution with a dipole structure over Eastern China associated with springtime thermal forcing over the Tibetan Plateau.

The Tibetan Plateau (TP) is essential in modulating climate change in downstream Eastern China (EC). As a meteorology-sensitive pollutant, changes in ozone (O) in connection with the TP have received limited attention. In this study, using climate analysis of the China High Air Pollutants O product and ERA5 reanalysis data of meteorology for 1980-2020, the effect of springtime TP thermal forcing on the warm season (April-September) O pollution over EC was investigated.

Inverse effects of aerosol radiative forcing on heavy PM pollution of local accumulation and regional transport over Central China.

Regional transport of air pollutants is a crucial factor influencing atmospheric environment, and aerosol radiative forcing (ARF) feedback to atmospheric boundary layer (ABL) structure and ambient air pollution is yet to be comprehensively understood over the receptor region of regional transport. By simulating meteorology and air pollutants during a heavy PM pollution event with WRF-Chem model, we quantitatively investigated the ARF and ABL interaction for PM pollution over the Twain-Hu Basin (THB), a key receptor region of regional transport over central China. Driven by northerly winds, PM was transported from upstream north China to downstream THB accompanied by high PM levels in the free troposphere.

Characterization of lncRNAs involved in cold acclimation of zebrafish ZF4 cells.

Long non-coding RNAs (lncRNAs) are increasingly regarded as a key role in regulating diverse biological processes in various tissues and species. Although the cold responsive lncRNAs have been reported in plants, no data is available on screening and functional prediction of lncRNAs in cold acclimation in fish so far. Here we compared the expression profile of lncRNAs in cold acclimated zebrafish embryonic fibroblast cells (ZF4) cultured at 18°C for 30 days with that of cells cultured at 28°C as control by high-throughput sequencing.