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- Mukunda M. Gogoi
- S. Suresh Babu
- B. S. Arun
- K. Krishna Moorthy
- A. Ajay
- P. Ajay
- Arun Suryavanshi
- Arup Borgohain
- Anirban Guha
- Atiba Shaikh
- Binita Pathak
- Biswadip Gharai
- Boopathy Ramasamy
- G. Balakrishnaiah
- Jagdish Chandra Kuniyal
- Jayabala Krishnan
- K. Rama Gopal
- M. Maheswari
- Manish Naja
- Parminder Kaur
- Pradip K. Bhuyan
- Pratima Gupta
- Prayagraj Singh
- Priyanka Srivastava
- R. S. Singh
- Ranjit Kumar
- Shantanu Rastogi
- Shyam Sundar Kundu
- Sobhan Kumar Kompalli
- Subhasmita Panda
- Tandule Chakradhar Rao
- Trupti Das
- Yogesh Kant
- Atiba A. Shaikh
- Avirup Sen
Journals
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Menon, Harilal B.
- Response of Ambient BC Concentration Across the Indian Region to the Nation-Wide Lockdown: Results from the ARFINET Measurements of ISRO-GBP
Abstract Views :307 |
PDF Views:89
Authors
Mukunda M. Gogoi
1,
S. Suresh Babu
1,
B. S. Arun
1,
K. Krishna Moorthy
2,
A. Ajay
3,
P. Ajay
4,
Arun Suryavanshi
5,
Arup Borgohain
6,
Anirban Guha
7,
Atiba Shaikh
8,
Binita Pathak
4,
Biswadip Gharai
9,
Boopathy Ramasamy
10,
G. Balakrishnaiah
11,
Harilal B. Menon
8,
Jagdish Chandra Kuniyal
12,
Jayabala Krishnan
13,
K. Rama Gopal
11,
M. Maheswari
13,
Manish Naja
14,
Parminder Kaur
7,
Pradip K. Bhuyan
4,
Pratima Gupta
15,
Prayagraj Singh
16,
Priyanka Srivastava
14,
R. S. Singh
17,
Ranjit Kumar
15,
Shantanu Rastogi
16,
Shyam Sundar Kundu
6,
Sobhan Kumar Kompalli
1,
Subhasmita Panda
10,
Tandule Chakradhar Rao
11,
Trupti Das
10,
Yogesh Kant
18
Affiliations
1 Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Divecha Centre for Climate Change, Indian Institute of Science, Bengaluru 560 012, IN
4 Centre for Atmospheric Studies, Dibrugarh University, Dibrugarh 786 004, IN
5 Regional Remote Sensing Centre, Indian Space Research Organisation, Nagpur 440 033, IN
6 North Eastern – Space Application Centres, Shillong 793 103, IN
7 Department of Physics, Tripura University, Suryamaninagar, Agartala 799 022, IN
8 Department of Marine Sciences, Goa University, Goa 403 206, IN
9 National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
10 Indian Institute of Mineral and Materials Technology, Bhubaneswar 751 013, IN
11 Sri Krishna Devaraya University, Anantapur 515 003, IN
12 G. B. Pant Institute of Himalayan Environment and Development, Kullu 175 126, IN
13 Tamil Nadu Agricultural University, Coimbatore 641 003, IN
14 Aryabhatta Research Institute of Observational Sciences, Nainital 263 002, IN
15 Department of Chemistry, Dayalbagh Educational Institute, Agra 282 005, IN
16 Department of Physics, D.D.U. Gorakhpur University, Gorakhpur 273 009, IN
17 Department of Chemical Engineering, IIT-BHU, Varanasi 221 005, IN
18 Indian Institute of Remote Sensing, Indian Space Research Organisation, Dehradun 248 001, IN
1 Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Divecha Centre for Climate Change, Indian Institute of Science, Bengaluru 560 012, IN
4 Centre for Atmospheric Studies, Dibrugarh University, Dibrugarh 786 004, IN
5 Regional Remote Sensing Centre, Indian Space Research Organisation, Nagpur 440 033, IN
6 North Eastern – Space Application Centres, Shillong 793 103, IN
7 Department of Physics, Tripura University, Suryamaninagar, Agartala 799 022, IN
8 Department of Marine Sciences, Goa University, Goa 403 206, IN
9 National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
10 Indian Institute of Mineral and Materials Technology, Bhubaneswar 751 013, IN
11 Sri Krishna Devaraya University, Anantapur 515 003, IN
12 G. B. Pant Institute of Himalayan Environment and Development, Kullu 175 126, IN
13 Tamil Nadu Agricultural University, Coimbatore 641 003, IN
14 Aryabhatta Research Institute of Observational Sciences, Nainital 263 002, IN
15 Department of Chemistry, Dayalbagh Educational Institute, Agra 282 005, IN
16 Department of Physics, D.D.U. Gorakhpur University, Gorakhpur 273 009, IN
17 Department of Chemical Engineering, IIT-BHU, Varanasi 221 005, IN
18 Indian Institute of Remote Sensing, Indian Space Research Organisation, Dehradun 248 001, IN
Source
Current Science, Vol 120, No 2 (2021), Pagination: 341-351Abstract
In this study, we assess the response of ambient aero-sol black carbon (BC) mass concentrations and spec-tral absorption properties across Indian mainland during the nation-wide lockdown (LD) in connection with the Coronavirus Disease 19 (COVID-19) pan-demic. The LD had brought near to total cut-off of emissions from industrial, traffic (road, railways, ma-rine and air) and energy sectors, though the domestic emissions remained fairly unaltered. This provided a unique opportunity to delineate the impact of fossil fuel combustion sources on atmospheric BC characte-ristics. In this context, the primary data of BC meas-ured at the national network of aerosol observatories (ARFINET) under ISRO-GBP are examined to assess the response to the seizure of emissions over distinct geographic parts of the country. Results indicate that average BC concentrations over the Indian mainland are curbed down significantly (10–40%) from pre-lockdown observations during the first and most in-tense phase of lockdown. This decline is significant with respect to the long-term (2015–2019) averaged (climatological mean) values. The drop in BC is most pronounced over the Indo-Gangetic Plain (>60%) and north-eastern India (>30%) during the second phase of lockdown, while significant reduction is seen during LD1 (16–60%) over central and peninsular Indian as well as Himalayan and sub-Himalayan regions. De-spite such a large reduction, the absolute magnitude of BC remained higher over the IGP and north-eastern sites compared to other parts of India. Notably, the spectral absorption index of aerosols changed very little over most of the locations, indicating the still persisting contribution of fossil-fuel emissions over most of the locations.Keywords
ARFINET, Black Carbon, COVID-19.References
- Ramanathan, V. and Carmichael, G., Global and regional climate changes due to black carbon. Nat. Geosci., 2008, 1, 221–227.
- Bond, T. C. et al., Bounding the role of black carbon in the cli-mate system: a scientific assessment. J. Geophys. Res. Atmos., 2013, 118, 5380–5552; doi:10.1002/jgrd.50171.
- Gogoi, M. M. et al., Radiative effects of absorbing aerosols over north-eastern India: observations and model simulations. J. Ge-ophys. Res. Atmos., 2017, 122(2), 1132–1157; doi:10.1002/ 2016JD025592.
- Li, G. L., Sun, L., Ho, K. F., Wong, K. C. and Ning, Z., Implica-tion of light absorption enhancement and mixing state of black carbon (BC) by coatings in Hong Kong. Aerosol Air Qual. Res., 2018, 18, 2753e2763.
- Lack, D. A., Moosmüller, H., McMeeking, G. R., Chakrabarty, R. K. and Baumgardner, D., Characterizing elemental, equivalent black, and refractory black carbon aerosol particles: a review of techniques, their limitations and uncertainties. Anal. Bioanal. Chem., 2014; doi:10.1007/s00216-013-7402-3.
- Weingartner, E., Saathof, H., Schnaiter, M., Streit, N., Bitnar, B. and Baltensperger, U., Absorption of light by soot particles: determination of the absorption coefficient by means of Ae-thalometers. J. Aerosol Sci., 2003, 34, 1445–1463; doi:10.1016/S0021-8502(03)00359-8.
- Drinovec, L. et al., The ‘dual-spot’ Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation. Atmos. Meas. Tech., 2015, 8, 1965–1979; doi: 10.5194/amt-8-1965-2015.
- Moorthy, K. K., Babu, S. S., Sunilkumar, S. V., Gupta, P. K. and Gera, B. S., Altitude profiles of aerosol BC, derived from aircraft measurements over an inland urban location in India. Geophys. Res. Lett., 2004; doi:10.1029/2004GL021336. L1B2103.
- Babu, S. S. et al., High altitude (~4520 m amsl) measurements of black carbon aerosols over western trans-Himalayas: seasonal heterogeneity and source apportionment. J. Geophys. Res. Atmos., 2011, 116(24), 1–15; doi:10.1029/2011JD016722.
- Gogoi, M. M. et al., Physical and optical properties of aerosols in a free tropospheric environment: Results from long-term observa-tions over western trans-Himalayas. Atmos. Environ., 2014, 84, 262–274.
- Arun, B. S., Aswini, A. R., Gogoi, M. M., Hegde, P., Kompalli, S. K., Sharma, P. and Babu, S. S., Physico-chemical and optical properties of aerosols at a background site (~4 km a.s.l.) in the western Himalayas. Atmos. Environ., 2019, doi:10.1016/j. atmosenv.2019.1170.
- Lau, K. M., Kim, M. K. and Kim, K. M., Aerosol induced anoma-lies in the Asian summer monsoon – the role of the Tibetan Plat-eau. Clim. Dyn., 2006, 26, 855–864; doi:10.1007/s00382-006-0114-z.
- Jain, S. and Sharma, T., Social and travel lockdown impact con-sidering coronavirus disease (COVID-19) on air quality in mega-cities of India: present benefits, future challenges and way for-ward. Aerosol Air Qual. Res., 2020; doi:10.4209/aaqr.2020. 04.0171.
- Mahato, S., Pal, S. and Ghosh, K. G., Effect of lockdown amid COVID-19 pandemic on air quality of the megacity Delhi, India. Sci. Total Environ., 2020; doi:10.1016/j.scitotenv.2020.139086.
- Sharma, S., Zhang, M., Anshika, Gao, J., Zhang, H. and Kota, S. H., Effect of restricted emissions during COVID-19 on air quality in India. Sci. Total Environ., 2020; doi:10.1016/j.scitotenv. 2020.138878.
- Bao, R. and Zhang, A., Does lockdown reduce air pollution? Evi-dence from 44 cities in northern China. Sci. Total Environ., 2020; doi:10.1016/j.scitotenv.2020.139052.
- Saadat, S., Rawtani, D. and Hussain, C. M., Environmental per-spective of COVID-19. Sci. Total Environ., 2020; doi:10.1016/ j.scitotenv.2020.138870.
- Xu, K., Cui, K., Young, L. H., Hsieh, Y. K., Wang, Y. F., Zhang, J. and Wan, S., Impact of the COVID-19 event on air quality in central China. Aerosol Air Qual. Res., 2020, 20, 915–929; doi: 10.4209/aaqr.2020.04.0150.
- Nakada, L. Y. K. and Urban, R. C., COVID-19 pandemic: Impacts on the air quality during the partial lockdown in São Paulo state, Brazil. Sci. Total Environ., 2020, 730, 139087; doi:10.1016/ j.scitotenv.2020.139087.
- Tobías, A. et al., Changes in air quality during the lockdown in Barcelona (Spain) one month into the SARS-CoV-2 epidemic. Sci. Total Environ., 2020, 726, 138540; doi:10.1016/j.scitotenv. 2020.138540.
- Otmani, A., Benchrif, A., Tahri, M., Bounakhla, M., Chakir, E. M., Bouch, M. E. and Krombi, M., Impact of COVID-19 lockdown on PM10, SO2 and NO2 concentrations in Salé City (Morocco). Sci. Total Environ., 2020; doi:10.1016/j.scitotenv. 2020.139541.
- Monserrate, M. A. Z. and Ruano, M. A., Has air quality improved in Ecuador during the COVID-19 pandemic? A parametric analy-sis. Air Quality Atmos. Health, 2020; doi:10.1007/s11869-020-00866-y.
- Bauwens, M. et al., Impact of coronavirus outbreak on NO2 pollu-tion assessed using TROPOMI and OMI observations. Geophys. Res. Lett., 2020; doi:10.1029/2020GL087978.
- Sicard, P. et al., Amplified ozone pollution in cities during the COVID-19 lockdown. Sci. Total Environ., 2020; doi:10.1016/ j.scitotenv.2020.139542.
- Schnaiter, M., Horvath, H., Mohler, O., Naumann, K.-H., Saatho, H. and Schock, O. W., UV-VIS-NIR spectral optical properties of soot and soot-containing aerosols. J. Aerosol Sci., 2003, 34, 1421–1444.
- Kirchstetter, T. W. and Novakov, T., Evidence that the spectral dependence of light absorption by aerosols is affected by organic carbon. J. Geophys. Res., 2004, 109, D21208; doi:10.1029/ 2004JD004999.
- Clarke, A. et al., Biomass burning and pollution aerosol over North America: Organic components and their influence on spec-tral optical properties and humidification response. J. Geophys. Res., 2007, 112, D12S18; doi:10.1029/2006JD007777.
- Kuniyal, J. C., Sharma, M., Chand, K. and Mathela, C. S., Water soluble ionic components in particulate matter (PM10) during high pollution episode days at Mohal and Kothi in the North-Western Himalaya, India. Aerosol Air Qual. Res., 2015, 15, 529–543.
- Joshi, H., Naja, M., David, L. M., Gupta, T., Gogoi, M. M. and Babu, S. S., Absorption characteristics of aerosols over the central Himalayas and its adjacent foothills. Atmos. Res., 2019, 233, 104718; doi:10.1016/j.atmosres.2019.104718.
- Dumka., U. C., Manchanda, R. K., Sinha, P. R., Sreenivasan, S., Moorthy, K. K. and Babu, S. S., Temporal variability and radia-tive impact of black carbon aerosol over tropical urban station Hyderabad. J. Atmos. Sol. Terr. Phys., 2013; doi:10.1016/ j.jastp.2013.08.003.
- Pandey, S. K. and Vinoj, V., Surprising increase in aerosol amid widespread decline in pollution over India during the Covid19 Lockdown, EarthArXiv., 2020; doi:10.31223/osf.io/5kmx2.
- Kumar, R. et al., Sources of black carbon aerosols in South Asia and surrounding regions during the integrated campaign for aero-sols, gases and radiation budget (ICARB). Atmos. Chem. Phys., 2015, 15(10), 5415–5428; doi:10.5194/acp-15-5415-2015.
- Effect Of SARS-CoV-2 Pandemic Induced Lockdown On The Aerosol Loading Over The Coastal State, Goa
Abstract Views :236 |
PDF Views:102
Authors
Affiliations
1 School of Earth, Ocean and Atmospheric Sciences, Goa University, Goa 403 206, IN
1 School of Earth, Ocean and Atmospheric Sciences, Goa University, Goa 403 206, IN
Source
Current Science, Vol 120, No 2 (2021), Pagination: 360-367Abstract
The SARS-CoV-2 pandemic resulted in India imposing a nationwide lockdown on 22 March 2020, bringing all human activities to a complete halt. The current study focuses on the effect of lockdown on the abundance of atmospheric aerosols over Goa. The study focused on pre-lockdown, lockdown and period corresponding to lockdown in 2019. The AOD spectra depicted a decrease in the anthropogenically derived fine mode aerosols during the lockdown compared to the pre-lockdown period. Mean AOD500 for prelockdown and lockdown periods were 0.43 ± 0.19 and 0.53 ± 0.11 respectively. The higher AOD500 during lockdown was due to an increase in naturally derived coarse mode aerosols, which is further confirmed with the lower Ångström exponent values (1.04 ± 0.11). The mean black carbon mass concentration for the respective periods were 1990.45 ± 470.87 ng m–3 and 1109.71 ± 218.33 ng m–3, and the mean atmospheric forcing during the respective periods were 25.13 ± 5.72 W m–2, 27.31 ± 3.71 W m–2 and 30.81 ± 5.59 W m–2 respectively.Keywords
Aerosol Optical Depth, Radiative Forcing, SARS-CoV-2.References
- Zambrano-monserrate, M. A., Alejandra, M. and Sanchez-alcalde, L., Science of the total environment indirect effects of COVID-19 on the environment. Sci. Total Environ., 2020, 728, 138813.
- Sharma, S., Zhang, M., Anshika, Gao, J., Zhang, H. and Kota, S. H., Effect of restricted emissions during COVID-19 on air quality in India. Sci. Total Environ., 2020, 728, 138878.
- Charlson, R. J. et al., Climate forcing by anthropogenic aerosols. Science, 1992, 255, 423–430.
- Ramanathan, V., Crutzen, P. J., Kiehl, J. T. and Rosenfeld, D., Aerosols, climate, and the hydrological cycle. Science, 2001, 294, 2119–2124.
- Pope III, C. A. and Dockery, D. W., Health effects of fine particulate air pollution: lines that connect health effects of fine particulate air pollution: lines that connect. J. Air Waste Manage. Assoc., 2006, 56, 709–742.
- Shirodkar, S. and Menon, H. B., Aerosol optical properties over a coastal site in Goa, along the west coast of India. J. Atmos. SolarTerrestrial Phys., 2015, 130, 182–189.
- Menon, H. B., Shirodkar, S., Kedia, S., Ramachandran, S., Babu, S. and Moorthy, K. K., Temporal variation of aerosol optical depth and associated shortwave radiative forcing over a coastal site along the west coast of India. Sci. Total Environ., 2014, 468, 83–92.
- Morys, M. et al., Design, calibration, and performance of MICROTOPS II handheld ozone monitor and Sun photometer. J. Geophys. Res. Atmos., 2001, 106, 14573–14582.
- Frouin, R. et al., Sun and sky radiance measurements and data analysis protocols. NASA/TM-2003-21621/Rev-Vol III, 60, 2003.
- Krishna Moorthy, K., Satheesh, S. K. and Krishna Murthy, B. V., Investigations of marine aerosols over the tropical Indian Ocean. J. Geophys. Res. Atmos., 1997, 102, 18827–18842.
- Ångström, A., Techniques of determining the turbidity of the atmosphere. Tellus, 1961, 13, 214–223.
- Hansen, A. D. A., Rosen, H. and Novakov, T., The aethalometer – an instrument for the real-time measurement of optical absorption by aerosol particles. Sci. Total Environ., 1984, 36, 191–196.
- Levelt, P. F. et al., Science objectives of the ozone monitoring instrument. IEEE Trans. Geosci. Remote Sens., 2006, 44, 1199– 1208.
- Hellerman, S. and Rosenstein, M., Normal monthly wind stress over the world ocean with error estimates. J. Phys. Oceanogr., 1983, 13, 1093–1104.
- Draxler, R. R. and Hess, G. D., Description of the HYSPLIT_4 Modeling System. NOAA Technical Memorandum ERL ARL224, NOAA Air Resour. Lab. Silver Spring, MD, 2004, p. 28.
- Stein, A. F., Draxler, R. R., Rolph, G. D., Stunder, B. J. B., Cohen, M. D. and Ngan, F., NOAA’s HYSPLIT atmospheric transport and dispersion modeling system. Bull. Am. Meteorol. Soc., 2015, 96, 2059–2077.
- Ricchiazzi, P., Yang, S., Gautier, C. and Sowle, D., SBDART: A research and teaching software tool for plane-parallel radiative transfer in the earth’s atmosphere. Bull. Am. Meteorol. Soc., 1998, 79, 2101–2114.
- Hess, M., Koepke, P. and Schult, I., Optical properties of aerosols and clouds: The software package OPAC. Bull. Am. Meteorol. Soc., 1998, 79, 831–844.
- Nair, S. K., Rajeev, K. and Parameswaran, K., Wintertime regional aerosol distribution and the influence of continental transport over Indian Ocean. J. Atmos. Solar-Terrestrial Phys., 2003, 65, 149–165.
- Moorthy, K. K. et al., Wintertime spatial characteristics of boundary layer aerosols over peninsular India. J. Geophys. Res. D Atmos., 2005, 110, 1–11.
- Moorthy, K. K., Satheesh, S. K., Babu, S. S. and Dutt, C. B. S., Integrated campaign for aerosols, gases and radiation budget (ICARB): an overview. J. Earth Syst. Sci., 2008, 117, 243–262.
- Eck, T. F. et al., Wavelength dependence of the optical depth of biomass burning, urban, and desert dust aerosols. J. Geophys. Res. Atmos., 1999, 104, 31333–31349.
- Toledano, C. et al., Aerosol optical depth and Ångström exponent climatology at El Arenosillo AERONET site (Huelva, Spain). Q. J. R. Meteorol. Soc. A J. Atmos. Sci. Appl. Meteorol. Phys. Oceanogr., 2007, 133, 795–807.
- Gogoi, M. M., Suresh Babu, S., Krishna Moorthy, K., Manoj, M. R. and Chaubey, J. P., Absorption characteristics of aerosols over the northwestern region of India: Distinct seasonal signatures of biomass burning aerosols and mineral dust. Atmos. Environ., 2013, 73, 92–102.