trends in aerosol optical depth over indiantrends in ......elevated aerosol layers & meridional...
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Trends in Aerosol Optical Depth over IndianTrends in Aerosol Optical Depth over Indian region: Potential causes and Impacts
S. Suresh BabuSpace Physics Laboratory
Vikram Sarabhai Space CentreThiruvananthapuram, INDIAp ,[email protected]/
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An Integrated Approach
Campaigns
Ground based observationsNetwork observatories
SatelliteSatellite measurements
Models
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ARFINET
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Soot on Snow/Glaciers
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BC near Sathopanth
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Aerosol over HimalayasHanle (32.78 N, 78.96 E, 4520 amsl)
Babu et al., J Geophys. Res., 2011
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Hanle (32.78 N, 78.96 E, 4520 amsl) vs NCOP(27.95 N, 86.82 E, 5079 amsl)
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Evidence of free troposphere warming by absorbing aerosol: Do BC build ‘their own homes’ up in the atmosphere?
Babu et al.,Geophys. Res. Lett., 2011
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Evidence of free troposphere warming by absorbing aerosol: Do BC build ‘their own homes’ up in the atmosphere?
Babu et al.,Geophys. Res. Lett., 2011
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Elevated aerosol layers & Meridional gradientsElevated aerosol layers & Meridional gradients
O C lOver Central India > 70% of aerosols reside above the clouds during pre-g pmonsoon
D l t d b bi lDo elevated absorbing aerosol layers build their ‘own homes’?If h d th ff tIf so, how do they affect regional climate?
Satheesh et al.,Geophys. Res. Lett., 2008
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Regional Aerosol Warming Experiment (RAWEX)(RAWEX)
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Integrated Campaign for Aerosols gases and
Radiation Budget ICARBRadiation Budget , ICARB
Moorthy et al., 2009
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Spatial Heterogeneity in aerosol properties over
i ioceanic regions
(Moorthy et al.,QJRMS, 2009
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Anthropogenic Radiative Forcing
(Nair et al.,J. Geophys.Res., 2010)
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Aerosol Radiative Forcing & Efficiency over BoB during Winter
(Babu et al.,J. Geophys.Res., 2012)
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(Babu et al.,J. Geophys.Res., 2012)
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Do models simulate BC accurately?
(Moorthy et al.,Atmos. Env., 2013)
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RegCM Simulations of BC
(Nair et.al., J. Geophys.Res., 2012)
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T d i AODTrends in AOD
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Multi Wavelength Radiometer
Moorthy et al., 1991; Saha et al., 2004;Babu et al., 2007; Gogoi et al., 2009;
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Trend in Regional Mean AOD
Geophys. Res. Lett., 2013
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Anthropogenic Influence
Geophys. Res. Lett., 2013
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Trend in Stratospheric AOD
0.0001 year-1
0.0002 year-1
0 00007 10.00007 year-1
(Vernier J, P., et al., 2011, GRL)
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Thank youThank you