Probing into the wintertime meteorology and particulate matter (PM2.5 and PM10) forecast over Delhi

Atmospheric Pollution Research(2022)

引用 9|浏览11
暂无评分
摘要
The Indian Institute of Tropical Meteorology (IITM), in partnership with the National Center for Atmospheric Research (NCAR), has developed a high resolution (400 m) air-quality Early Warning System (EWS) for Delhi using an advanced approach of assimilating aerosol optical depth, fire emissions from a space-borne platform, and real-time aerosol observations from in-situ network in WRF-Chem model to produce a 72-h forecast. The present study summarizes the performance of EWS forecast and prevailing meteorological conditions for winter months of 2020–2021. We examined the performance of model-simulated meteorology by comparing against the in-situ observations. The model shows a positive bias in downwelling shortwave radiation (≈ 34 Wm−2) and warm bias in near-surface temperature (≈ 3 K). The simulated winds while having realistic magnitudes depict more southwesterly behavior compared to the observations. The model struggles to accurately predict Planetary Boundary Layer Height. The model realistically simulates the relationship between wind and air quality parameters. The air quality forecast from the model is found to be skillful in three different AQI categories, with accuracy > 88% for critical category events. The model also exhibits good statistical performance in predicting AQI, with low mean bias (¡ 8%), high correlation (¿ 0.68), and low variance (NMSE ¡ 0.09).
更多
查看译文
关键词
WRF-Chem,Particulate matter,Delhi NCR region,Winter fog,Meteorological parameters
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要