气候变化领域集成服务门户(CCPortal): Vertically resolved black carbon measurements and associated heating rates obtained using in situ balloon platform

CCPortal

DOI	10.1016/j.atmosenv.2020.117541
	Vertically resolved black carbon measurements and associated heating rates obtained using in situ balloon platform
	Ratnam M.V.; Raj S.T.A.; Madhavan B.L.; Vernier J.P.; Kiran V.R.; Jain C.D.; Basha G.; Nagendra N.; Kumar B.S.; Pandit A.K.; Murthy B.V.K.; Jayaraman A.
发表日期	2020
ISSN	1352-2310
卷号	232
英文摘要	Vertically resolved Black Carbon (BC) measurements are obtained in situ up to 10 km during the summer monsoon season using a micro-aethalometer on-board balloon platform from Hyderabad (17.48oN, 78.40oE, 557 m msl), India. Simultaneous (on-board) aerosol size-segregated mass concentration measurements are made at particle sizes 0.5, 1.0, 2.5, 5.0 and 10.0 μm using a Particle plus Optical Particle Counter for estimating the fractions of BC in size segregated (SS) PM2.5 and the fraction of SSPM2.5 in SSPM10. A prominent aerosol layer with large BC mass concentrations in the range of 10–25 μg/m3 is found below 4 km (above mean sea level) which matches well with the measured SSPM2.5 concentrations showing consistency in the two independent measurements. Thin layers of BC are also detected at mid-tropospheric region at altitude ~7 km and another between 8 and 10 km. FLEXPART analysis for back trajectories suggests that these high concentrations of BC are transported from over the west Asian region of Somalia, Gulf of Aden and Oman. Meteorological parameters along with ozone concentrations obtained simultaneously using radiosonde and ozonesonde together with BC concentrations are used to estimate the actual BC heating rates for the first time. Shortwave BC heating rates as high as 4 K/day are observed in the lower thick layer. It is suggested that this strong heating rate can act as a feedback in weakening the stable layer and well mixing of pollutants up to 4–5 km altitude. Heating rates obtained using standard tropical atmosphere model is found to be overestimated in this case suggesting the use of real time atmospheric conditions for actual estimates. © 2020 Elsevier Ltd
英文关键词	Black carbon profile; Heating rates; Micro-aethalometer
语种	英语
scopus关键词	Aerosols; Balloons; Carbon; Heating; Heating rate; Meteorological instruments; Particle size analysis; Sea level; Atmospheric conditions; Back trajectories; Independent measurement; Mass concentration; Meteorological parameters; Optical particle counters; Ozone concentration; Tropical atmospheres; Particle size; black carbon; ozone; altitude; black carbon; concentration (composition); heating; mixing; ozone; ozonesonde; particle size; radiosonde; real time; vertical distribution; Article; atmospheric dispersion; Gulf of Aden; heating; meteorology; Oman; particle size; particulate matter; pollution monitoring; priority journal; rainy season; Somalia; summer; Arabian Sea; Gulf of Aden; Hyderabad [Telangana]; Indian Ocean; Oman; Somalia
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129480
作者单位	National Atmospheric Research Laboratory, Gadanki, India; National Institute of Aerospace, Hampton, VA, United States; NASA Langley Research Center, United States; Tata Institute of Fundamental Research Balloon Facility, Hyderabad, India; Universities Space Research AssociationMD, United States; B1, CEBROS, Chennai, India; Bangalore University, Bangalore, India
推荐引用方式 GB/T 7714	Ratnam M.V.,Raj S.T.A.,Madhavan B.L.,et al. Vertically resolved black carbon measurements and associated heating rates obtained using in situ balloon platform[J],2020,232.
APA	Ratnam M.V..,Raj S.T.A..,Madhavan B.L..,Vernier J.P..,Kiran V.R..,...&Jayaraman A..(2020).Vertically resolved black carbon measurements and associated heating rates obtained using in situ balloon platform.Atmospheric Environment,232.
MLA	Ratnam M.V.,et al."Vertically resolved black carbon measurements and associated heating rates obtained using in situ balloon platform".Atmospheric Environment 232(2020).