Trends in Aerosol Optical Depth over IndianTrends in ......Elevated aerosol layers & Meridional...
Transcript of Trends in Aerosol Optical Depth over IndianTrends in ......Elevated aerosol layers & Meridional...
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]/
An Integrated Approach
Campaigns
Ground based observationsNetwork observatories
SatelliteSatellite measurements
Models
ARFINET
Soot on Snow/Glaciers
BC near Sathopanth
Aerosol over HimalayasHanle (32.78 N, 78.96 E, 4520 amsl)
Babu et al., J Geophys. Res., 2011
Hanle (32.78 N, 78.96 E, 4520 amsl) vs NCOP(27.95 N, 86.82 E, 5079 amsl)
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
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
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
Regional Aerosol Warming Experiment (RAWEX)(RAWEX)
Integrated Campaign for Aerosols gases and
Radiation Budget ICARBRadiation Budget , ICARB
Moorthy et al., 2009
Spatial Heterogeneity in aerosol properties over
i ioceanic regions
(Moorthy et al.,QJRMS, 2009
Anthropogenic Radiative Forcing
(Nair et al.,J. Geophys.Res., 2010)
Aerosol Radiative Forcing & Efficiency over BoB during Winter
(Babu et al.,J. Geophys.Res., 2012)
(Babu et al.,J. Geophys.Res., 2012)
Do models simulate BC accurately?
(Moorthy et al.,Atmos. Env., 2013)
RegCM Simulations of BC
(Nair et.al., J. Geophys.Res., 2012)
T d i AODTrends in AOD
Multi Wavelength Radiometer
Moorthy et al., 1991; Saha et al., 2004;Babu et al., 2007; Gogoi et al., 2009;
Trend in Regional Mean AOD
Geophys. Res. Lett., 2013
Anthropogenic Influence
Geophys. Res. Lett., 2013
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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