气候变化领域集成服务门户(CCPortal): Transport of black carbon from planetary boundary layer to free troposphere during the summer monsoon over South Asia

CCPortal

DOI	10.1016/j.atmosres.2019.104761
	Transport of black carbon from planetary boundary layer to free troposphere during the summer monsoon over South Asia
	Singh P.; Sarawade P.; Adhikary B.
发表日期	2020
ISSN	0169-8095
卷号	235
英文摘要	This study uses Weather Research and Forecasting model, coupled with Chemistry (WRF-Chem), to understand black carbon (BC) vertical transport over South Asia during the active convection period. We analyze the climatology (1995–2014) of convective weather using TRMM lightning data. The results show both temporal and spatial variability within South Asia. The WRF-Chem model simulation for BC transport was conducted for an ENSO (El-Nino Southern Oscillation) moderate year - 2013. The model simulates the observed concentrations trend for most of the region except the central Himalayan cities. Our analysis indicates the dominant role of synoptic atmospheric dynamics and upper boundary conditions for the inverted seasonal trend of BC during the pre-monsoon season over these cities. The study presents time series and seasonal scale analysis of BC concentration over South Asia at various altitude levels. Our model simulations suggest that free troposphere (FT) BC concentration is higher in the monsoon season compared to the winter season at the same elevation. In addition, our results show the presence of a persistent BC plume from 500 hPa and above over central India with implications for the summer monsoon. The presence of an anti-cyclonic region during the monsoon season at the higher troposphere (500–300 hPa) contributes to this stable BC layer. Although individual high convection days (high helicity/CAPE) can easily transport a significant amount of BC from the surface to the FT, simulations do not show significant BC transported to the upper troposphere-lower stratosphere during these days. While satellite derived products provide some insights into model predictions, there is a need for in-situ measurements of BC concentration aloft over South Asia to further constrain model performance and improve understanding of BC transport to FT. © 2019
英文关键词	Black carbon; Convection; Monsoon; South Asia; Vertical
学科领域	Atmospheric pressure; Boundary layers; Carbon; Climatology; Heat convection; Time series analysis; Troposphere; Weather forecasting; Black carbon; El Nino southern oscillation; Monsoon; Planetary boundary layers; South Asia; Temporal and spatial variability; Vertical; Weather research and forecasting models; Atmospheric thermodynamics; atmospheric convection; atmospheric transport; black carbon; boundary layer; climatology; monsoon; summer; troposphere; weather forecasting; South Asia
语种	英语
scopus关键词	Atmospheric pressure; Boundary layers; Carbon; Climatology; Heat convection; Time series analysis; Troposphere; Weather forecasting; Black carbon; El Nino southern oscillation; Monsoon; Planetary boundary layers; South Asia; Temporal and spatial variability; Vertical; Weather research and forecasting models; Atmospheric thermodynamics; atmospheric convection; atmospheric transport; black carbon; boundary layer; climatology; monsoon; summer; troposphere; weather forecasting; South Asia
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120505
作者单位	Department of Physics, University of Mumbai, Mumbai, 400098, India; International Centre for Integrated Mountain Development (ICIMOD), Khumaltar, Lalitpur, Nepal
推荐引用方式 GB/T 7714	Singh P.,Sarawade P.,Adhikary B.. Transport of black carbon from planetary boundary layer to free troposphere during the summer monsoon over South Asia[J],2020,235.
APA	Singh P.,Sarawade P.,&Adhikary B..(2020).Transport of black carbon from planetary boundary layer to free troposphere during the summer monsoon over South Asia.Atmospheric Research,235.
MLA	Singh P.,et al."Transport of black carbon from planetary boundary layer to free troposphere during the summer monsoon over South Asia".Atmospheric Research 235(2020).