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DOI | 10.1016/j.atrnosres.2018.03.013 |
Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India | |
Vachaspati, C. Viswanatha1; Begam, G. Reshma1,2; Ahammed, Y. Nazeer1; Kumar, K. Raghavendra3; Reddy, R. R.4 | |
2018-09-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 209页码:36-49 |
文章类型 | Article |
语种 | 英语 |
国家 | India; Peoples R China |
英文摘要 | In this paper, we present the optical and radiative properties of aerosols for the first time measured at Yogi Vemana University (YVU) campus (14.47 degrees N, 78.82 degrees E, 138m above sea level), Kadapa, a semi-arid region in southern India during December 2013-February 2015. The collocated measurements of aerosol optical depth (AOD) and black carbon (BC) mass concentration are carried out at Kadapa using the ten channels Multi Wavelength solar Radiometer (MWR) and seven wavelengths Aethalometer, respectively. This work mainly focused on studying the temporal and spectral behavior of aerosol properties, and their implications to the aerosol direct radiative forcing (ADRF). The respective seasonal mean values of AOD at 500 nm were found to be 0.33 +/- 0.01, 0.46 +/- 0.05, 0.27 +/- 0.02 and 0.37 +/- 0.06 during the winter, summer, monsoon and post monsoon, with an annual mean of 0.38 +/- 0.18. It is revealed that the Angstrom exponent (AE or asso-sso) value was observed to be maximum (minimum) in March (July) with 1.75 +/- 0.19 (0.65 +/- 0.14) indicates a predominance of fine (coarse) mode aerosols. Added to this, the diurnal variations of BC mass concentration exhibited two maxima with peaks occurred during 07:00-08:00 h and 20:00-21:00 h local time (LT), and a minimum of the afternoon hours around 13:00-16:00 h LT. Further, the AOD-AE relationship was investigated over Kadapa, and the results conclude that the urban-industrial/biomass burning (UI/BB) type aerosols are more dominated during the study period. The OPAC model retrieved single scattering albedo (SSA) at 500 nm was found to vary between 0.83 and 0.92 with relatively lower values during winter, suggest an increase in absorbing type aerosols produced from anthropogenic activities. The SBDART model computed seasonal averaged ADRF within the atmosphere (ADRFATm) was found to be 26.7 +/- 2.3, 25.1 +/- 1.0, 17.8 +/- 3.9 and 18.3 +/- 2.6 W m(-2) during the summer, winter, monsoon and post-monsoon seasons, respectively at Kadapa. This illustrated that the absorption of solar radiation in the ATM is high which produces a significant amount of heating effect, resulted in a maximum atmospheric heating rate of 0.75 K day(-1). |
英文关键词 | Aerosol optical depth Black carbon aerosol Aerosol types Single scattering albedo Aerosol direct radiative forcing Multi-wavelength solar radiometer |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435051100003 |
WOS关键词 | TROPICAL COASTAL STATION ; BLACK CARBON AEROSOLS ; LONG-RANGE TRANSPORT ; YANGTZE-RIVER DELTA ; WAVELENGTH DEPENDENCE ; ANGSTROM EXPONENT ; TEMPORAL HETEROGENEITY ; SOURCE IDENTIFICATION ; ATMOSPHERIC AEROSOLS ; SEASONAL VARIABILITY |
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/38132 |
专题 | 地球科学 |
作者单位 | 1.Yogi Vemana Univ, Dept Phys, Atmospher Sci Lab, Kadapa 516003, Andhra Pradesh, India; 2.Rajiv Gandhi Univ Knowledge Technol, Dr APJ Abdul Kalarn IITT Ongole IIIT Ongole, Dept Phys, Nuzividu 516330, Andhra Pradesh, India; 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Int Joint Lab Climate & Environm Change ILCEC,Min, Key Lab Aerosol Cloud Precipitat,China Meteorol A, Nanjing 210044, Jiangsu, Peoples R China; 4.Sri Krishnadevaraya Univ, Dept Phys, Aerosol & Atmospher Res Lab, Anantapur 515003, Andhra Pradesh, India |
推荐引用方式 GB/T 7714 | Vachaspati, C. Viswanatha,Begam, G. Reshma,Ahammed, Y. Nazeer,et al. Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India[J]. ATMOSPHERIC RESEARCH,2018,209:36-49. |
APA | Vachaspati, C. Viswanatha,Begam, G. Reshma,Ahammed, Y. Nazeer,Kumar, K. Raghavendra,&Reddy, R. R..(2018).Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India.ATMOSPHERIC RESEARCH,209,36-49. |
MLA | Vachaspati, C. Viswanatha,et al."Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India".ATMOSPHERIC RESEARCH 209(2018):36-49. |
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