globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.03.013
Scopus记录号: 2-s2.0-85044573163
论文题名:
Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India
作者: Viswanatha Vachaspati C.; Reshma Begam G.; Nazeer Ahammed Y.; Raghavendra Kumar K.; Reddy R.R.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 209
起始页码: 36
结束页码: 49
语种: 英语
英文关键词: Aerosol direct radiative forcing ; Aerosol optical depth ; Aerosol types ; Black carbon aerosol ; Multi-wavelength solar radiometer ; Single scattering albedo
Scopus关键词: Arid regions ; Atmospheric aerosols ; Atmospheric radiation ; Atmospheric thermodynamics ; Fog ; Radiometers ; Sea level ; Solar radiation ; Aerosol direct radiative forcing ; Aerosol optical depths ; Aerosol types ; Black carbon aerosol ; Multi wavelength solar radiometers ; Single scattering albedo ; Optical properties
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°N, 78.82°E, 138 m 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 Ångström exponent (AE or α380–850) 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. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108868
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Atmospheric Science Laboratory, Department of Physics, Yogi Vemana University, Kadapa, Andhra Pradesh 516 003, India; Department of Physics, Dr. A. P. J. Abdul Kalam-IIIT Ongole (IIIT-Ongole), Rajiv Gandhi University of Knowledge TechnologiesAndhra Pradesh 516 330, India; Collaborative Innovation Centre for Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Meteorological Disasters, Ministry of Education (KLME), International Joint Laboratory on Climate and Environment Change (ILCEC), Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China; Aerosol & Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur, Andhra Pradesh 515 003, India

Recommended Citation:
Viswanatha Vachaspati C.,Reshma Begam G.,Nazeer Ahammed Y.,et al. Characterization of aerosol optical properties and model computed radiative forcing over a semi-arid region, Kadapa in India[J]. Atmospheric Research,2018-01-01,209
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