气候变化领域集成服务门户(CCPortal): Simulations of black carbon over the Indian region: Improvements and implications of diurnality in emissions

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DOI	10.5194/acp-19-8229-2019
	Simulations of black carbon over the Indian region: Improvements and implications of diurnality in emissions
	Govardhan G.; Krishnakumari Satheesh S.; Krishna Moorthy K.; Nanjundiah R.
发表日期	2019
ISSN	16807316
起始页码	8229
结束页码	8241
卷号	19 期号:12
英文摘要	With a view to improving the performance of WRF-Chem over the Indian region in simulating BC (black carbon) mass concentrations as well as its short-term variations, especially on a diurnal scale, a region-specific diurnal variation scheme has been introduced in the model emissions and the performance of the modified simulations has been evaluated against high-resolution measurements carried out over eight ARFI (Aerosol Radiative Forcing over India) network observatories spread across India for distinct seasons: pre-monsoon (represented by May), post-monsoon (represented by October) and winter (represented by December). In addition to an overall improvement in the simulated concentrations and their temporal variations, we have also found that the effects of prescribing diurnally varying emissions on the simulated near-surface concentrations largely depend on the boundary layer turbulence. The effects are perceived quickly (within about 2-3 h) during the evening-early morning hours when the atmospheric boundary layer is shallow and convective mixing is weak, while they are delayed, taking as much as about 5-6 h, during periods when the boundary layer is deep and convective mixing is strong. This information would also serve as an important input for agencies concerned with urban planning and pollution mitigation. Despite these improvements in the near-surface concentrations, the simulated columnar aerosol optical depth (AOD) still remains largely underestimated vis-à-vis the satellite-retrieved products. These modifications will serve as a guideline for further model-improvement initiatives at a regional scale. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; black carbon; computer simulation; diurnal variation; emission inventory; numerical model; optical depth; performance assessment; radiative forcing; India
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144318
作者单位	Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, India; Divecha Centre for Climate Change, Indian Institute of Science, Bangalore, India; Indian Institute of Tropical Meteorology, Pune, India
推荐引用方式 GB/T 7714	Govardhan G.,Krishnakumari Satheesh S.,Krishna Moorthy K.,et al. Simulations of black carbon over the Indian region: Improvements and implications of diurnality in emissions[J],2019,19(12).
APA	Govardhan G.,Krishnakumari Satheesh S.,Krishna Moorthy K.,&Nanjundiah R..(2019).Simulations of black carbon over the Indian region: Improvements and implications of diurnality in emissions.Atmospheric Chemistry and Physics,19(12).
MLA	Govardhan G.,et al."Simulations of black carbon over the Indian region: Improvements and implications of diurnality in emissions".Atmospheric Chemistry and Physics 19.12(2019).