Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.09.018 |
Most probable mixing state of aerosols in Delhi NCR, northern India | |
Srivastava, Parul1; Dey, Sagnik1; Srivastava, Atul Kumar2; Singh, Sachchidanand3; Tiwari, Suresh2 | |
2018-02-01 | |
发表期刊 | ATMOSPHERIC RESEARCH
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ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 200页码:88-96 |
文章类型 | Article |
语种 | 英语 |
国家 | India |
英文摘要 | Unknown mixing state is one of the major sources of uncertainty in estimating aerosol direct radiative forcing (DRF). Aerosol DRF in India is usually reported for external mixing and any deviation from this would lead to high bias and error. Limited information on aerosol composition hinders in resolving this issue in India. Here we use two years of aerosol chemical composition data measured at megacity Delhi to examine the most probable aerosol mixing state by comparing the simulated clear-sky downward surface flux with the measured flux. We consider external, internal, and four combinations of core-shell (black carbon, BC over dust; water-soluble, WS over dust; WS over water-insoluble, WINS and BC over WINS) mixing. Our analysis reveals that choice of external mixing (usually considered in satellite retrievals and climate models) seems reasonable in Delhi only in the pre-monsoon (Mar-Jun) season. During the winter (Dec-Feb) and monsoon (Jul-Sep) seasons, 'WS coating over dust' externally mixed with BC and WINS appears to be the most probable mixing state; while 'WS coating over WINS' externally mixed with BC and dust seems to be the most probable mixing state in the post-monsoon (Oct-Nov) season. Mean seasonal TOA (surface) aerosol DRF for the most probable mixing states are 4.4 +/- 3.9 (- 25.9 +/- 3.9), - 16.3 +/- 5.7 (- 42.4 +/- 10.5), 13.6 +/- 11.4 (-76.6 +/- 16.6) and -5.4 +/- 7.7 (- 80.0 +/- 7.2) W m(-2) respectively in the pre-monsoon, monsoon, post-monsoon and winter seasons. Our results highlight the importance of realistic mixing state treatment in estimating aerosol DRF to aid in policy making to combat climate change. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416394400008 |
WOS关键词 | BLACK CARBON AEROSOLS ; OPTICAL-PROPERTIES ; HIMALAYAN FOOTHILLS ; ABSORPTION ; CITY ; AETHALOMETER ; RAINFALL ; AERONET ; KANPUR ; LIGHT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/38039 |
专题 | 地球科学 |
作者单位 | 1.Indian Inst Technol Delhi, Ctr Atmospher Sci, New Delhi 110016, India; 2.Indian Inst Trop Meteorol, Delhi Branch, Prof Ramnath Vij Marg, New Delhi 110060, India; 3.Natl Phys Lab, Radio & Atmospher Sci Div, Dr KS Krishnan Marg, New Delhi 110012, India |
推荐引用方式 GB/T 7714 | Srivastava, Parul,Dey, Sagnik,Srivastava, Atul Kumar,et al. Most probable mixing state of aerosols in Delhi NCR, northern India[J]. ATMOSPHERIC RESEARCH,2018,200:88-96. |
APA | Srivastava, Parul,Dey, Sagnik,Srivastava, Atul Kumar,Singh, Sachchidanand,&Tiwari, Suresh.(2018).Most probable mixing state of aerosols in Delhi NCR, northern India.ATMOSPHERIC RESEARCH,200,88-96. |
MLA | Srivastava, Parul,et al."Most probable mixing state of aerosols in Delhi NCR, northern India".ATMOSPHERIC RESEARCH 200(2018):88-96. |
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