Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-9623-2017 |
Possible climatic implications of high-altitude black carbon emissions | |
Govardhan, Gaurav1; Satheesh, Sreedharan Krishnakumari1,2; Nanjundiah, Ravi1,2; Moorthy, Krishnaswamy Krishna1; Babu, Surendran Suresh3 | |
2017-08-10 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:15 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | On account of its strong absorption of solar and terrestrial radiation, black carbon (BC) aerosol is known to impact large-scale systems, such as the Asian monsoon and the Himalayan glaciers, in addition to affecting the thermal structure of the lower atmosphere. While most studies focus on the near-surface abundance and impacts of BC, our study examines the implications of sharp and confined layers of high BC concentration (called elevated BC layers) at altitudes more than 4 km over the Indian region using the online regional chemistry transport model (WRF-Chem) simulations. These elevated BC layers were revealed in the recent in situ measurements using high-altitude balloons carried out on 17 March 2010, 8 January 2011 and 25 April 2011. Our study demonstrates that high-flying aircraft (with emissions from the regionally fine-tuned MACCity inventory) are the most likely cause of these elevated BC layers. Furthermore, we show that such aircraft-emitted BC can be transported to upper tropospheric or lower stratospheric heights (similar to 17 km) aided by the strong monsoonal convection occurring over the region, which is known to overshoot the tropical tropopause, leading to the injection of tropospheric air mass (along with its constituent aerosols) into the stratosphere. We show observational evidence for such an intrusion of tropospheric BC into the stratosphere over the Indian region using extinction coefficient and particle depolarisation ratio data from CALIOP Lidar on-board the CALIPSO satellite. We hypothesise that such intrusions of BC into the lower stratosphere and its consequent longer residence time in the stratosphere have significant implications for stratospheric ozone, espe-cially considering the already reported ozone-depleting potential of BC. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407464800001 |
WOS关键词 | AEROSOL LIGHT-ABSORPTION ; LOWER STRATOSPHERE ; UPPER TROPOSPHERE ; SOOT AEROSOL ; AIRCRAFT MEASUREMENTS ; CONVECTIVE-TRANSPORT ; RADIATIVE-TRANSFER ; OPTICAL-PROPERTIES ; INDIAN REGION ; GLOBAL-MODEL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30861 |
专题 | 地球科学 |
作者单位 | 1.Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bangalore, Karnataka, India; 2.Indian Inst Sci, Divecha Ctr Climate Change, Bangalore, Karnataka, India; 3.Vikram Sarabhai Space Ctr, Space Phys Lab, Thiruvananthapuram, Kerala, India |
推荐引用方式 GB/T 7714 | Govardhan, Gaurav,Satheesh, Sreedharan Krishnakumari,Nanjundiah, Ravi,et al. Possible climatic implications of high-altitude black carbon emissions[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(15). |
APA | Govardhan, Gaurav,Satheesh, Sreedharan Krishnakumari,Nanjundiah, Ravi,Moorthy, Krishnaswamy Krishna,&Babu, Surendran Suresh.(2017).Possible climatic implications of high-altitude black carbon emissions.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(15). |
MLA | Govardhan, Gaurav,et al."Possible climatic implications of high-altitude black carbon emissions".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.15(2017). |
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